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Part number 51428262
2nd
edition English
December 2017
SERVICE MANUAL
521G
Tier 4B (final)
Wheel Loader
Printed in U.S.A.
© 2018 CNH Industrial Italia S.p.A. All Rights Reserved.
Case is a trademark registered in the United States and many
other countries, owned or licensed to CNH Industrial N.V.,
its subsidiaries or affiliates.
SERVICE MANUAL
521G WHEEL LOADER XR-EH, NEW CAB TIER4B NA
521G WHEEL LOADER XT-EH, NEW CAB TIER4B NA
521G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA
51428262_EN 14/12/2017
EN
Contents
INTRODUCTION
Engine....................................................................................... 10
[10.001] Engine and crankcase ............................................................. 10.1
[10.216] Fuel tanks .......................................................................... 10.2
[10.202] Air cleaners and lines .............................................................. 10.3
[10.500] Selective Catalytic Reduction (SCR) exhaust treatment ........................... 10.4
[10.400] Engine cooling system ............................................................. 10.5
[10.414] Fan and drive ...................................................................... 10.6
[10.310] Aftercooler.......................................................................... 10.7
[10.304] Engine lubrication system.......................................................... 10.8
Transmission.............................................................................. 21
[21.113] Powershift transmission ............................................................ 21.1
[21.135] Powershift transmission external controls.......................................... 21.2
[21.155] Powershift transmission internal components...................................... 21.3
Four-Wheel Drive (4WD) system .................................................. 23
[23.314] Drive shaft.......................................................................... 23.1
Front axle system ....................................................................... 25
[25.100] Powered front axle ................................................................. 25.1
[25.102] Front bevel gear set and differential ............................................... 25.2
[25.108] Final drive hub, steering knuckles, and shafts ..................................... 25.3
[25.310] Final drives ......................................................................... 25.4
Rear axle system........................................................................ 27
[27.100] Powered rear axle.................................................................. 27.1
[27.106] Rear bevel gear set and differential................................................ 27.2
[27.120] Planetary and final drives .......................................................... 27.3
[27.124] Final drive hub, steering knuckles, and shafts ..................................... 27.4
51428262_EN 14/12/2017
Brakes and controls .................................................................... 33
[33.202] Hydraulic service brakes ........................................................... 33.1
[33.110] Parking brake or parking lock ...................................................... 33.2
Hydraulic systems....................................................................... 35
[35.000] Hydraulic systems.................................................................. 35.1
[35.300] Reservoir, cooler, and filters........................................................ 35.2
[35.106] Variable displacement pump ....................................................... 35.3
[35.359] Main control valve.................................................................. 35.4
[35.357] Pilot system ........................................................................ 35.5
[35.204] Remote control valves ............................................................. 35.6
[35.752] Hydraulic fan drive cooling system................................................. 35.7
[35.701] Front loader arm hydraulic system ................................................. 35.8
[35.723] Front loader bucket hydraulic system .............................................. 35.9
[35.734] Tool quick coupler hydraulic system ............................................. 35.10
Frames and ballasting ................................................................. 39
[39.100] Frame .............................................................................. 39.1
Steering..................................................................................... 41
[41.200] Hydraulic control components...................................................... 41.1
[41.216] Cylinders ........................................................................... 41.2
[41.910] Auxiliary steering ................................................................... 41.3
Wheels...................................................................................... 44
[44.511] Front wheels........................................................................ 44.1
[44.520] Rear wheels........................................................................ 44.2
Cab climate control ..................................................................... 50
[50.200] Air conditioning..................................................................... 50.1
Electrical systems....................................................................... 55
[55.000] Electrical system ................................................................... 55.1
[55.100] Harnesses and connectors......................................................... 55.2
51428262_EN 14/12/2017
[55.201] Engine starting system ............................................................. 55.3
[55.301] Alternator........................................................................... 55.4
[55.302] Battery.............................................................................. 55.5
[55.988] Selective Catalytic Reduction (SCR) electrical system ............................ 55.6
[55.989] Exhaust Gas Recirculation (EGR) electrical system ............................... 55.7
[55.512] Cab controls........................................................................ 55.8
[55.415] Loader arm and bucket control system ............................................ 55.9
[55.530] Camera........................................................................... 55.10
[55.DTC] FAULT CODES.................................................................. 55.11
Front loader and bucket............................................................... 82
[82.100] Arm................................................................................. 82.1
[82.300] Bucket.............................................................................. 82.2
Platform, cab, bodywork, and decals............................................. 90
[90.150] Cab................................................................................. 90.1
[90.120] Mechanically-adjusted operator seat............................................... 90.2
[90.124] Pneumatically-adjusted operator seat.............................................. 90.3
[90.105] Machine shields and guards ....................................................... 90.4
51428262_EN 14/12/2017
INTRODUCTION
51428262_EN 14/12/2017
1
INTRODUCTION
Safety rules
Personal safety
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all
safety messages that follow this symbol to avoid possible death or injury.
Throughout this manual you will find the signal words DANGER, WARNING, and CAUTION followed by special in-
structions. These precautions are intended for the personal safety of you and those working with you.
Read and understand all the safety messages in this manual before you operate or service the machine.
DANGER indicates a hazardous situation that, if not avoided, will result in death or serious injury.
WARNING indicates a hazardous situation that, if not avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.
FAILURE TO FOLLOW DANGER, WARNING, AND CAUTION MESSAGES COULD RESULT
IN DEATH OR SERIOUS INJURY.
Machine safety
NOTICE: Notice indicates a situation that, if not avoided, could result in machine or property damage.
Throughout this manual you will find the signal word Notice followed by special instructions to prevent machine or
property damage. The word Notice is used to address practices not related to personal safety.
Information
NOTE: Note indicates additional information that clarifies steps, procedures, or other information in this manual.
Throughout this manual you will find the word Note followed by additional information about a step, procedure, or
other information in the manual. The word Note is not intended to address personal safety or property damage.
51428262_EN 14/12/2017
3
INTRODUCTION
Personal safety
Carefully read this Manual before proceeding with main-
tenance, repairs, refuelling or other machine operations.
Repairs have to be carried out only by authorized and in-
structed staff; specific precautions have to be taken when
grinding, welding or when using mallets or heavy ham-
mers.
Non-authorized persons are not allowed to repair or carry
out maintenance on this machine. Do not carry out any
work on the equipment without prior authorization.
Ask your employer about the safety instructions in force
and safety equipment.
Nobody should be allowed in the cab during machine
maintenance unless he is a qualified operator helping
with the maintenance work.
If it is necessary to move the equipment to carry out re-
pairs or maintenance, do not lift or lower the equipment
from any other position than the operator’s seat.
TULI12WEX2004AA 1
Never carry out any operation on the machine when the
engine is running, except when specifically indicated.
Stop the engine and ensure that all pressure is relieved
from hydraulic circuits before removing caps, covers,
valves, etc.
All repair and maintenance operations should be carried
out with the greatest care and attention.
Service stairs and platforms used in a workshop or in the
field should be built in compliance with the safety rules in
force.
Any functional disorders, especially those affecting the
safety of the machine, should therefore be rectified im-
mediately.
DANGER
Unexpected movement!
Make sure parking brake is applied. Secure
machine with wheel chocks.
Failure to comply will result in death or serious
injury.
D0013A
TULI12WEX2005AA 2
Before performing any work on the machine, attach a
maintenance in progress tag. This tag can be applied on
the left-hand control lever, safety lever or cab door.
51428262_EN 14/12/2017
4
INTRODUCTION
Emergency
Be prepared for emergencies. Always keep a fire extin-
guisher and first aid kit readily available. Ensure that the
fire extinguisher is serviced in accordance with the man-
ufacturer’s instructions.
SMIL12WEX0174AA 3
Equipment
Wear close fitting clothing and safety equipment appropri-
ate for the job:
• Safety helmet
• Safety shoes
• Heavy gloves
• Reflective clothing
• Wet weather clothing
If working conditions require, the following personal safety
equipment should be on hand:
• Respirators (or dust proof masks)
• Ear plugs or acoustic ears protections
• Goggles with lateral shield or masks for eye protection
Do not wear rings, wristwatches, jewelry, unbuttoned or
flapping clothing such as ties, torn clothes, scarves, open
jackets or shirts with open zips which could get caught into
moving parts.
TULI12WEX2008AA 4
Engine - Radiator
Never leave the engine running in enclosed spaces with-
out proper ventilation which is able to evacuate toxic ex-
haust gases- Keep the exhaust manifold and tube free
from combustible materials.
Do not refuel with the engine running, especially if hot, as
this increases fire hazard in case of fuel spillage.
Never attempt to check or adjust the belts when the en-
gine is running.
Never lubricate the machine with the engine running.
TULI12WEX2009AA 5
51428262_EN 14/12/2017
5
INTRODUCTION
Product identification - Identification of machine components
LEIL16WHL1254FB 1
1. Cab door and hand holds 5. Roll Over Protection System (ROPS) cab
2. Steps 6. Loader lift arm
3. Bucket (Z-bar version) 7. Battery compartment
4. Bucket cylinder 8. Timed disconnect switch and optional battery jump
post
51428262_EN 14/12/2017
23
INTRODUCTION
LEIL16WHL1255FB 2
1. Cab side window 5. Cab air filter door
2. Driving lights 6. Windshield washer reservoir
3. Bucket (Z-bar version) 7. DIESEL EXHAUST FLUID (DEF)/ADBLUE® fill tank
4. Drive shaft
51428262_EN 14/12/2017
24
SERVICE MANUAL
Engine
521G WHEEL LOADER XR-EH, NEW CAB TIER4B NA
521G WHEEL LOADER XT-EH, NEW CAB TIER4B NA
521G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA
51428262_EN 14/12/2017
10
Contents
Engine - 10
[10.001] Engine and crankcase ............................................................... 10.1
[10.216] Fuel tanks ............................................................................ 10.2
[10.202] Air cleaners and lines ................................................................ 10.3
[10.500] Selective Catalytic Reduction (SCR) exhaust treatment ............................. 10.4
[10.400] Engine cooling system ............................................................... 10.5
[10.414] Fan and drive ........................................................................ 10.6
[10.310] Aftercooler............................................................................ 10.7
[10.304] Engine lubrication system............................................................ 10.8
51428262_EN 14/12/2017
10
Engine - 10
Engine and crankcase - 001
521G WHEEL LOADER XR-EH, NEW CAB TIER4B NA
521G WHEEL LOADER XT-EH, NEW CAB TIER4B NA
521G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA
51428262_EN 14/12/2017
10.1 [10.001] / 1
Engine - Engine and crankcase
Engine - General specification
Engine with 4 Speed Transmission
A. Low idle 1020 – 1080 RPM
Alternate low idle 870 – 930 RPM
Alternate Accelerated Idle 1270 – 1330 RPM
B. Maximum No Load RPM 2074 – 2244 RPM
C. Converter Stall 1950 – 2030 RPM
D. Hydraulic Stall 2020 – 2220 RPM
E. Converter and Hydraulic Stall 1400 – 1600 RPM
Temperature of the torque converter oil 82 – 104 °C (180 – 219 °F)
Temperature of the hydraulic oil 54 – 57 °C (129 – 135 °F)
NOTE: hydraulic stall and converter and hydraulic stall RPM values are read with the lift arms raised, the bucket held
in rolled back position, and the engine at Wide Open Throttle (WOT) in maximum power mode with the transmission
in manual mode and in third gear.
Engine - Engine horse power
Design characteristics
Displacement 4485 cm³ (273.7 in³)
Engine Configuration 4 cylinder in line, 4 stroke
Intake Air Turbocharged, 4 valves/cyl
Fuel injection High pressure common rail
EGR: No
Performance
Altitude Capability 3000 m (9842.5 ft)
High Idle Speed 2170 RPM
Low Idle Speed 700 RPM
Rated Power 105 kW at 2000 RPM
Peak Torque 608 N·m at 1600 RPM
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10.1 [10.001] / 3
Engine - Engine and crankcase
LEIL17WHL0355GA 1
NOTE: performances detected at engine test bench.
NOTE: BSFC indicates the (Brake Specific Fuel Consumption).
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10.1 [10.001] / 4
Engine - Engine and crankcase
Engine - Remove
NOTE: emissions sensors mounted in the exhaust stream are sensitive to extreme vibrations. Use of tools that gen-
erate extreme vibrations, such as impact wrenches and hammers, will result in damage to emission sensors. Avoid
using these tools during any service procedure in close proximity of emission sensors. If the use of these tools cannot
be avoided, remove the sensors using extreme caution prior to performing any service procedure.
1. Park the machine on a level surface and lower the
bucket to the ground. Put the articulation lock in the
LOCKED position.
RAPH12WEL1412AA 1
2. Turn the engine OFF. Actuate the brake pedal several
times to discharge the brake accumulators.
LEIL15WHL0564AA 2
3. Turn the key switch to the ON position.
Move the control lever(s) back and forth minimally 30
times to release pressure from the hydraulic circuit.
Put the key switch to the OFF position.
LEIL16WHL1286AA 3
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Engine - Engine and crankcase
4. Slowly loosen the hydraulic reservoir filler cap to re-
lease air pressure in the hydraulic reservoir.
RCPH10WHL099BAL 4
5. Raise the engine hood using the handle hood under the
rear grill.
LEIL16WHL2000AB 5
6. Remove the retaining bolts of the inner fender panels.
NOTE: right-hand side of the machine is shown. The op-
eration is similar for the left-hand side.
LEIL16WHL1378AB 6
7. Locate the timed disconnect switch under the engine
hood, on the left-hand side of the machine. Turn the
timed disconnect switch to the OFF position.
LEIL16WHL1382AB 7
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Engine - Engine and crankcase
8. Remove the two battery covers. Disconnect the batter-
ies from the machine.
LEIL16WHL1225AA 8
9. Loosen the screw (1) and open the access cover (2)
under the battery.
RAPH12WEL1494AA 9
10. Place a suitable container below the radiator drain.
Remove the drain plug (1) and radiator cap to drain
the engine coolant into the container. then reinstall
the radiator cap after the coolant has drained.
NOTE: see machine specifications for cooling system vol-
ume.
RAPH12WEL1411AA 10
11. Place a suitable container below the engine oil drain.
Remove the engine oil cap (2) to drain the engine oil
into the container. Then reinstall the engine oil cap
after the engine oil has drained.
NOTE: see machine specifications for cooling system vol-
ume.
NOTE: after draining the engine oil, disconnect the drain
hose from the frame to aid in removal of engine.
RAPH12WEL1411AA 11
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Engine - Engine and crankcase
12. Double up a nylon lifting strap and slide the strap
through the exhaust stack (1), located on the engine
hood.
LEIL14WHL0400AB 12
13. Place a solid steel bar through the nylon strap. Raise
the engine hood and release the tension on the lifting
motor.
RAPH12WEL1458AA 13
14. Remove the right-hand gas strut from the engine
hood.
Remove the left-hand gas strut from the engine hood.
RAPH12WEL1489AA 14
15. Remove the gas spring to separate the engine hood
from the rear chassis.
NOTE: engine hood is NOT shown.
LEIL16WHL1432AB 15
51428262_EN 14/12/2017
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Engine - Engine and crankcase
16. Disconnect the hood wiring harness connector from
the rear chassis wiring harness connector. Identify
and tag the connectors to aid in reassembly.
LEIL15WHL0142AB 16
17. Tag and disconnect the backup alarm connector (1).
Remove the two straps cable tie (2).
LEIL15WHL0143AB 17
18. Remove the connector (1) from the battery isolator.
LEIL16WHL1381AB 18
19. Tag and disconnect the battery to isolator cable (1)
and the isolator to starter cable (2) from the battery
isolator.
Disconnect the connector (3) from the timed discon-
nect switch.
LEIL16WHL1342AB 19
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Engine - Engine and crankcase
20. With the assistance of another technician, balance the
engine hood and remove the hood hinge mounting
bolts (1) near the cab (2) from the cooler frame. Re-
peat the procedure for the other side.
RAPH12WEL1461AA 20
21. Carefully raise and remove the engine hood from the
machine. Lower the engine hood onto a suitable plat-
form. Disconnect the lifting equipment from the ex-
haust stack (1).
LEIL14WHL0400AB 21
22. Loosen the two bolts (2) and the related washers to
remove the bracket (1) of the relay decal.
LEIL15WHL0195AB 22
23. Tag and disconnect the engine wiring harness con-
nector from the air filter sensor (1). Loosen the clamp
(2) on the air intake hose (3) and disconnect the hose.
LEIL15WHL0196AB 23
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Engine - Engine and crankcase
24. Tag and disconnect the engine wiring harness con-
nector from the air inlet humidity sensor (1).
LEIL15WHL0197AB 24
25. Loosen the clamps (2) on the turbocharger.
26. Loosen the clamps (3) on the air filter housing.
27. Loosen the clamp (4) on the crankcase vent hose (5).
28. Remove the intake air hose (1). Cover the tur-
bocharger inlet to prevent debris entry.
LEIL15WHL0198AB 25
29. Loosen the bolt to separate the P-clamp (of the alter-
nate hose) on the engine side of the heat shield.
LEIL15WHL0148AA 26
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Engine - Engine and crankcase
30. Remove the two securing bolts (3), the four washers
(4), and two nuts (5). Remove the bracket (2) with the
air filter (1) as an assembly.
LEIL15WHL0171BB 27
31. Remove the four mounting bolts and the four washers
from the belt cover. Remove the cover.
LEIL16WHL1311AB 28
LEIL16WHL1362AB 29
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Engine - Engine and crankcase
32. After removing the belt cover, remove the cover
mounting bracket from the right rear side of machine
frame.
LEIL16WHL1343AB 30
33. If machine is equipped with the air conditioning sys-
tem, identify, tag, and disconnect the engine wiring
harness connectors from the air compressor clutch
connector (1).
Recovery the refrigerant, as indicated in Air condi-
tioning - Service instruction (50.200). Disconnect
the low-pressure line (2) from the suction port and
the high-pressure line (3) from the discharge port, lo-
cated on the compressor. Immediately install protec-
tive caps on the open ports and lines.
LEIL16WHL1349AB 31
34. Remove the belt (4). Remove the three mounting
bolts (2). Remove the bolt (3) and carefully remove
the compressor (1) with the support bracket.
LEIL16WHL1380AB 32
35. Remove the drive belt from the engine.
LEIL15WHL0192AB 33
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Engine - Engine and crankcase
36. Loosen the clamp. Remove and discard the O-ring
and the air intake tube of the turbocharger.
LEIL16WHL1346AB 34
37. Loosen the clamp of the hose of the after cooler inlet
and remove the hose.
LEIL15WHL0263AB 35
38. Remove the clamp (2) and the clamp (3).
Separate the clamp (4) from the bracket of the coolant
overflow tank.
Loosen the bolts (1) to remove the coolant tank.
LEIL15WHL0264AB 36
39. Remove the bolts and the washers (2) to separate the
bracket (1) of the overflow tank from the rear plate of
the cooling system frame.
LEIL15WHL0265AB 37
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Engine - Engine and crankcase
40. Loosen the bolts (1) and remove the two clamps to
separate the SCR sensor wiring harness from the rear
chassis.
LEIL15WHL0272AB 38
41. Tag and disconnect the SCR sensor connector from
the rear chassis harness connector.
LEIL16WHL1347AB 39
42. Loosen the hexagonal nut of the temperature sensor
(1). Disconnect the temperature sensor (1) on the
exhaust pipe (DOC to SCR).
43. Tag and disconnect the wire harness (3) of the rear
chassis wiring harness of the temperature sensor (1).
Cut the straps (2) that hold the sensor lead.
LEIL16WHL1348AB 40
44. Remove the bolts, the washers, and the nuts (3) to
separate the bracket (2) of the tube radiator from the
muffler support (1).
LEIL15WHL0267AB 41
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Engine - Engine and crankcase
45. Remove the two bolts (1), the four washers (2), and
the two nuts (3) to separate the clamps (4) and (6)
from the bracket (8).
Remove the clamp (4) from the DEF bundle (5). Re-
move the clamp (6) from the hose coolant assembly
(7).
LEIL15WHL0193BB 42
46. Remove the two bolts (4), the washers (5), the spacer
(10), and the nut (6) to separate the clamp (3) from
the bracket (11). Remove the clamp (3) from the hose
coolant assembly (1).
47. Remove the two bolts (8), the washers (9), and the
nut (6) to separate the clamp (7) from the bracket (11).
Remove the clamp (7) from the DEF bundle (2).
LEIL15WHL0261BB 43
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Engine - Engine and crankcase
48. Drain the engine coolant.
Disconnect the hoses (1) from the Dosing Module (2).
LEIL15WHL0323AB 44
49. Disconnect the electrical connector (3) from the Dos-
ing Module (2).
LEIL15WHL0176AA 45
50. Loosen the bolt to remove the P-clamps (1). Discon-
nect the return coolant hose (2) and remove it from
the machine.
LEIL15WHL0270AB 46
51. Loosen the bolt (1) and remove the P-clamp (3) from
the supply module support (4). Remove the P-clamp
(2). Tag and disconnect the hose (5) from the DEF/
ADBLUE® tank vent filter.
LEIL15WHL0269AB 47
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Engine - Engine and crankcase
52. Remove the bolts (2) to remove the DEF/ADBLUE®
tank vent filter (1) from the rear plate of the cooling
system frame.
LEIL15WHL0268AB 48
53. Remove the bolts (2) and washers to remove the
bracket (1) from the engine.
LEIL15WHL0191AB 49
54. Loosen the clamp (1) to separate the exhaust flap from
the inlet DOC pipe.
LEIL15WHL0172AB 50
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Engine - Engine and crankcase
55. Attach a suitable lifting straps to support the muffler
support (1) with the Diesel Oxidation Catalyst (DOC)
(6) and the Selective Catalytic Reduction muffler
(SCR) (7).
56. Remove the bolts (4) and (5) with their related wash-
ers to separate the muffler support (1) from the sup-
port structures (2) and (3).
57. Remove the muffler support (1), the SCR and the SCR
sensor harness as an assembly.
NOTE: do not damage the muffler support during removal.
LEIL16WHL1345BB 51
58. Tag and disconnect the DEF/ADBLUE® supply and re-
turn lines (1) from the supply module. Tag and discon-
nect the coolant water supply and return lines (2) from
the supply module. Tag and disconnect the wiring har-
ness (3) from the supply module.
LEIL16WHL1497AB 52
59. Push inward on the fitting retaining clip and discon-
nect the coolant outlet (2), the coolant inlet (1) and
by-pass (3) lines from the heater control valve. Tag
and disconnect the machine wiring harness (4) from
the heater control valve.
LEIL16WHL1375AB 53
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Engine - Engine and crankcase
60. Tag and disconnect the fuel filter heater wire (1) and
the water sensor (2). Drain the fuel filter and discon-
nect the inlet fuel line (3) and outlet fuel line (4) from
the fuel filter head. Plug the lines and cap the fittings.
LEIL16WHL1374AB 54
61. Remove the fuel line from the top of the ECU (Engine
Control Unit).
Plug the line and cap the fitting.
LEIL15WHL0306AB 55
62. Remove the two bolts (1), the washers, and the nuts to
separate the bracket (2) of the supply module from the
support (3). Remove the two bolts (4), the washers,
and the nuts to separate the bracket (2) of the supply
module from the rear chassis. Remove the bracket
(2) of the supply module, with the supply module, the
DEF/ADBLUE® Heater Control valve and the fuel pre-
filter as an assembly.
NOTE: pay attention to supply module and heater valve.
LEIL16WHL1373AB 56
63. Remove the six bolts (1) and the six washer (2). Re-
move the DEF/ADBLUE® storage tank cover (3) lo-
cated on the right-hand side of the machine.
LEIL15WHL0303AB 57
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Engine - Engine and crankcase
64. Tag and disconnect the wire harness and DEF/
ADBLUE® supply and return lines from the
DEF/ADBLUE® storage tank. Cap the supply lines.
LEIL15WHL0304AA 58
65. Remove the bolts (1), the washers, and the nuts to
remove the supply module support (2).
LEIL15WHL0276AB 59
66. Remove the four bolts (3) and the four washers (4) to
remove the support structures (1)from the rear chas-
sis (2).
LEIL16WHL1344BB 60
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Engine - Engine and crankcase
67. Loosen the clamp on the intake manifold that secures
the after cooler output hose.
RAPH12WEL1464AA 61
68. Loosen the clamp (2) on the after cooler and remove
the output hose (1) of the after cooler from the inter-
cooler.
LEIL15WHL0277AB 62
69. Remove the cooling fan screen (3) and the bottom
cooling fan screen (2) removing the four bolts (1) and
the related nuts.
LEIL15WHL0301AB 63
70. Loosen the clamps (1) and (2) to remove the bottom
hose coolant (3) from the engine.
NOTE: the battery cover plate has been hidden for clarify.
LEIL15WHL0278AB 64
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Engine - Engine and crankcase
71. Cut the tie straps (1) and remove the clamp (4). Sep-
arate the breather hose (3) from the radiator hose (2).
Loosen clamp (6) from the hose (5). Loosen clamp on
the engine then remove the hose (5).
LEIL15WHL0279AB 65
72. Remove the nuts (2) from the U-bolt clamp, to sepa-
rate the radiator hose (3) from the bracket (1).
LEIL15WHL0280AB 66
73. Remove the clamp (1) to disconnect the breather hose
(2) from the engine.
LEIL15WHL0291AB 67
74. Remove the bolts (1), the washers, and the nuts to re-
move the bracket (2) from the rear plate of the cooling
system frame.
LEIL15WHL0292AB 68
51428262_EN 14/12/2017
10.1 [10.001] / 23

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Case 521 g tier 4b (final) wheel loader service repair manual

  • 1. Part number 51428262 2nd edition English December 2017 SERVICE MANUAL 521G Tier 4B (final) Wheel Loader Printed in U.S.A. © 2018 CNH Industrial Italia S.p.A. All Rights Reserved. Case is a trademark registered in the United States and many other countries, owned or licensed to CNH Industrial N.V., its subsidiaries or affiliates.
  • 2. SERVICE MANUAL 521G WHEEL LOADER XR-EH, NEW CAB TIER4B NA 521G WHEEL LOADER XT-EH, NEW CAB TIER4B NA 521G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA 51428262_EN 14/12/2017 EN
  • 3. Contents INTRODUCTION Engine....................................................................................... 10 [10.001] Engine and crankcase ............................................................. 10.1 [10.216] Fuel tanks .......................................................................... 10.2 [10.202] Air cleaners and lines .............................................................. 10.3 [10.500] Selective Catalytic Reduction (SCR) exhaust treatment ........................... 10.4 [10.400] Engine cooling system ............................................................. 10.5 [10.414] Fan and drive ...................................................................... 10.6 [10.310] Aftercooler.......................................................................... 10.7 [10.304] Engine lubrication system.......................................................... 10.8 Transmission.............................................................................. 21 [21.113] Powershift transmission ............................................................ 21.1 [21.135] Powershift transmission external controls.......................................... 21.2 [21.155] Powershift transmission internal components...................................... 21.3 Four-Wheel Drive (4WD) system .................................................. 23 [23.314] Drive shaft.......................................................................... 23.1 Front axle system ....................................................................... 25 [25.100] Powered front axle ................................................................. 25.1 [25.102] Front bevel gear set and differential ............................................... 25.2 [25.108] Final drive hub, steering knuckles, and shafts ..................................... 25.3 [25.310] Final drives ......................................................................... 25.4 Rear axle system........................................................................ 27 [27.100] Powered rear axle.................................................................. 27.1 [27.106] Rear bevel gear set and differential................................................ 27.2 [27.120] Planetary and final drives .......................................................... 27.3 [27.124] Final drive hub, steering knuckles, and shafts ..................................... 27.4 51428262_EN 14/12/2017
  • 4. Brakes and controls .................................................................... 33 [33.202] Hydraulic service brakes ........................................................... 33.1 [33.110] Parking brake or parking lock ...................................................... 33.2 Hydraulic systems....................................................................... 35 [35.000] Hydraulic systems.................................................................. 35.1 [35.300] Reservoir, cooler, and filters........................................................ 35.2 [35.106] Variable displacement pump ....................................................... 35.3 [35.359] Main control valve.................................................................. 35.4 [35.357] Pilot system ........................................................................ 35.5 [35.204] Remote control valves ............................................................. 35.6 [35.752] Hydraulic fan drive cooling system................................................. 35.7 [35.701] Front loader arm hydraulic system ................................................. 35.8 [35.723] Front loader bucket hydraulic system .............................................. 35.9 [35.734] Tool quick coupler hydraulic system ............................................. 35.10 Frames and ballasting ................................................................. 39 [39.100] Frame .............................................................................. 39.1 Steering..................................................................................... 41 [41.200] Hydraulic control components...................................................... 41.1 [41.216] Cylinders ........................................................................... 41.2 [41.910] Auxiliary steering ................................................................... 41.3 Wheels...................................................................................... 44 [44.511] Front wheels........................................................................ 44.1 [44.520] Rear wheels........................................................................ 44.2 Cab climate control ..................................................................... 50 [50.200] Air conditioning..................................................................... 50.1 Electrical systems....................................................................... 55 [55.000] Electrical system ................................................................... 55.1 [55.100] Harnesses and connectors......................................................... 55.2 51428262_EN 14/12/2017
  • 5. [55.201] Engine starting system ............................................................. 55.3 [55.301] Alternator........................................................................... 55.4 [55.302] Battery.............................................................................. 55.5 [55.988] Selective Catalytic Reduction (SCR) electrical system ............................ 55.6 [55.989] Exhaust Gas Recirculation (EGR) electrical system ............................... 55.7 [55.512] Cab controls........................................................................ 55.8 [55.415] Loader arm and bucket control system ............................................ 55.9 [55.530] Camera........................................................................... 55.10 [55.DTC] FAULT CODES.................................................................. 55.11 Front loader and bucket............................................................... 82 [82.100] Arm................................................................................. 82.1 [82.300] Bucket.............................................................................. 82.2 Platform, cab, bodywork, and decals............................................. 90 [90.150] Cab................................................................................. 90.1 [90.120] Mechanically-adjusted operator seat............................................... 90.2 [90.124] Pneumatically-adjusted operator seat.............................................. 90.3 [90.105] Machine shields and guards ....................................................... 90.4 51428262_EN 14/12/2017
  • 7. INTRODUCTION Safety rules Personal safety This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible death or injury. Throughout this manual you will find the signal words DANGER, WARNING, and CAUTION followed by special in- structions. These precautions are intended for the personal safety of you and those working with you. Read and understand all the safety messages in this manual before you operate or service the machine. DANGER indicates a hazardous situation that, if not avoided, will result in death or serious injury. WARNING indicates a hazardous situation that, if not avoided, could result in death or serious injury. CAUTION indicates a hazardous situation that, if not avoided, could result in minor or moderate injury. FAILURE TO FOLLOW DANGER, WARNING, AND CAUTION MESSAGES COULD RESULT IN DEATH OR SERIOUS INJURY. Machine safety NOTICE: Notice indicates a situation that, if not avoided, could result in machine or property damage. Throughout this manual you will find the signal word Notice followed by special instructions to prevent machine or property damage. The word Notice is used to address practices not related to personal safety. Information NOTE: Note indicates additional information that clarifies steps, procedures, or other information in this manual. Throughout this manual you will find the word Note followed by additional information about a step, procedure, or other information in the manual. The word Note is not intended to address personal safety or property damage. 51428262_EN 14/12/2017 3
  • 8. INTRODUCTION Personal safety Carefully read this Manual before proceeding with main- tenance, repairs, refuelling or other machine operations. Repairs have to be carried out only by authorized and in- structed staff; specific precautions have to be taken when grinding, welding or when using mallets or heavy ham- mers. Non-authorized persons are not allowed to repair or carry out maintenance on this machine. Do not carry out any work on the equipment without prior authorization. Ask your employer about the safety instructions in force and safety equipment. Nobody should be allowed in the cab during machine maintenance unless he is a qualified operator helping with the maintenance work. If it is necessary to move the equipment to carry out re- pairs or maintenance, do not lift or lower the equipment from any other position than the operator’s seat. TULI12WEX2004AA 1 Never carry out any operation on the machine when the engine is running, except when specifically indicated. Stop the engine and ensure that all pressure is relieved from hydraulic circuits before removing caps, covers, valves, etc. All repair and maintenance operations should be carried out with the greatest care and attention. Service stairs and platforms used in a workshop or in the field should be built in compliance with the safety rules in force. Any functional disorders, especially those affecting the safety of the machine, should therefore be rectified im- mediately. DANGER Unexpected movement! Make sure parking brake is applied. Secure machine with wheel chocks. Failure to comply will result in death or serious injury. D0013A TULI12WEX2005AA 2 Before performing any work on the machine, attach a maintenance in progress tag. This tag can be applied on the left-hand control lever, safety lever or cab door. 51428262_EN 14/12/2017 4
  • 9. INTRODUCTION Emergency Be prepared for emergencies. Always keep a fire extin- guisher and first aid kit readily available. Ensure that the fire extinguisher is serviced in accordance with the man- ufacturer’s instructions. SMIL12WEX0174AA 3 Equipment Wear close fitting clothing and safety equipment appropri- ate for the job: • Safety helmet • Safety shoes • Heavy gloves • Reflective clothing • Wet weather clothing If working conditions require, the following personal safety equipment should be on hand: • Respirators (or dust proof masks) • Ear plugs or acoustic ears protections • Goggles with lateral shield or masks for eye protection Do not wear rings, wristwatches, jewelry, unbuttoned or flapping clothing such as ties, torn clothes, scarves, open jackets or shirts with open zips which could get caught into moving parts. TULI12WEX2008AA 4 Engine - Radiator Never leave the engine running in enclosed spaces with- out proper ventilation which is able to evacuate toxic ex- haust gases- Keep the exhaust manifold and tube free from combustible materials. Do not refuel with the engine running, especially if hot, as this increases fire hazard in case of fuel spillage. Never attempt to check or adjust the belts when the en- gine is running. Never lubricate the machine with the engine running. TULI12WEX2009AA 5 51428262_EN 14/12/2017 5
  • 10. INTRODUCTION Product identification - Identification of machine components LEIL16WHL1254FB 1 1. Cab door and hand holds 5. Roll Over Protection System (ROPS) cab 2. Steps 6. Loader lift arm 3. Bucket (Z-bar version) 7. Battery compartment 4. Bucket cylinder 8. Timed disconnect switch and optional battery jump post 51428262_EN 14/12/2017 23
  • 11. INTRODUCTION LEIL16WHL1255FB 2 1. Cab side window 5. Cab air filter door 2. Driving lights 6. Windshield washer reservoir 3. Bucket (Z-bar version) 7. DIESEL EXHAUST FLUID (DEF)/ADBLUE® fill tank 4. Drive shaft 51428262_EN 14/12/2017 24
  • 12. SERVICE MANUAL Engine 521G WHEEL LOADER XR-EH, NEW CAB TIER4B NA 521G WHEEL LOADER XT-EH, NEW CAB TIER4B NA 521G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA 51428262_EN 14/12/2017 10
  • 13. Contents Engine - 10 [10.001] Engine and crankcase ............................................................... 10.1 [10.216] Fuel tanks ............................................................................ 10.2 [10.202] Air cleaners and lines ................................................................ 10.3 [10.500] Selective Catalytic Reduction (SCR) exhaust treatment ............................. 10.4 [10.400] Engine cooling system ............................................................... 10.5 [10.414] Fan and drive ........................................................................ 10.6 [10.310] Aftercooler............................................................................ 10.7 [10.304] Engine lubrication system............................................................ 10.8 51428262_EN 14/12/2017 10
  • 14. Engine - 10 Engine and crankcase - 001 521G WHEEL LOADER XR-EH, NEW CAB TIER4B NA 521G WHEEL LOADER XT-EH, NEW CAB TIER4B NA 521G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA 51428262_EN 14/12/2017 10.1 [10.001] / 1
  • 15. Engine - Engine and crankcase Engine - General specification Engine with 4 Speed Transmission A. Low idle 1020 – 1080 RPM Alternate low idle 870 – 930 RPM Alternate Accelerated Idle 1270 – 1330 RPM B. Maximum No Load RPM 2074 – 2244 RPM C. Converter Stall 1950 – 2030 RPM D. Hydraulic Stall 2020 – 2220 RPM E. Converter and Hydraulic Stall 1400 – 1600 RPM Temperature of the torque converter oil 82 – 104 °C (180 – 219 °F) Temperature of the hydraulic oil 54 – 57 °C (129 – 135 °F) NOTE: hydraulic stall and converter and hydraulic stall RPM values are read with the lift arms raised, the bucket held in rolled back position, and the engine at Wide Open Throttle (WOT) in maximum power mode with the transmission in manual mode and in third gear. Engine - Engine horse power Design characteristics Displacement 4485 cm³ (273.7 in³) Engine Configuration 4 cylinder in line, 4 stroke Intake Air Turbocharged, 4 valves/cyl Fuel injection High pressure common rail EGR: No Performance Altitude Capability 3000 m (9842.5 ft) High Idle Speed 2170 RPM Low Idle Speed 700 RPM Rated Power 105 kW at 2000 RPM Peak Torque 608 N·m at 1600 RPM 51428262_EN 14/12/2017 10.1 [10.001] / 3
  • 16. Engine - Engine and crankcase LEIL17WHL0355GA 1 NOTE: performances detected at engine test bench. NOTE: BSFC indicates the (Brake Specific Fuel Consumption). 51428262_EN 14/12/2017 10.1 [10.001] / 4
  • 17. Engine - Engine and crankcase Engine - Remove NOTE: emissions sensors mounted in the exhaust stream are sensitive to extreme vibrations. Use of tools that gen- erate extreme vibrations, such as impact wrenches and hammers, will result in damage to emission sensors. Avoid using these tools during any service procedure in close proximity of emission sensors. If the use of these tools cannot be avoided, remove the sensors using extreme caution prior to performing any service procedure. 1. Park the machine on a level surface and lower the bucket to the ground. Put the articulation lock in the LOCKED position. RAPH12WEL1412AA 1 2. Turn the engine OFF. Actuate the brake pedal several times to discharge the brake accumulators. LEIL15WHL0564AA 2 3. Turn the key switch to the ON position. Move the control lever(s) back and forth minimally 30 times to release pressure from the hydraulic circuit. Put the key switch to the OFF position. LEIL16WHL1286AA 3 51428262_EN 14/12/2017 10.1 [10.001] / 5
  • 18. Engine - Engine and crankcase 4. Slowly loosen the hydraulic reservoir filler cap to re- lease air pressure in the hydraulic reservoir. RCPH10WHL099BAL 4 5. Raise the engine hood using the handle hood under the rear grill. LEIL16WHL2000AB 5 6. Remove the retaining bolts of the inner fender panels. NOTE: right-hand side of the machine is shown. The op- eration is similar for the left-hand side. LEIL16WHL1378AB 6 7. Locate the timed disconnect switch under the engine hood, on the left-hand side of the machine. Turn the timed disconnect switch to the OFF position. LEIL16WHL1382AB 7 51428262_EN 14/12/2017 10.1 [10.001] / 6
  • 19. Engine - Engine and crankcase 8. Remove the two battery covers. Disconnect the batter- ies from the machine. LEIL16WHL1225AA 8 9. Loosen the screw (1) and open the access cover (2) under the battery. RAPH12WEL1494AA 9 10. Place a suitable container below the radiator drain. Remove the drain plug (1) and radiator cap to drain the engine coolant into the container. then reinstall the radiator cap after the coolant has drained. NOTE: see machine specifications for cooling system vol- ume. RAPH12WEL1411AA 10 11. Place a suitable container below the engine oil drain. Remove the engine oil cap (2) to drain the engine oil into the container. Then reinstall the engine oil cap after the engine oil has drained. NOTE: see machine specifications for cooling system vol- ume. NOTE: after draining the engine oil, disconnect the drain hose from the frame to aid in removal of engine. RAPH12WEL1411AA 11 51428262_EN 14/12/2017 10.1 [10.001] / 7
  • 20. Engine - Engine and crankcase 12. Double up a nylon lifting strap and slide the strap through the exhaust stack (1), located on the engine hood. LEIL14WHL0400AB 12 13. Place a solid steel bar through the nylon strap. Raise the engine hood and release the tension on the lifting motor. RAPH12WEL1458AA 13 14. Remove the right-hand gas strut from the engine hood. Remove the left-hand gas strut from the engine hood. RAPH12WEL1489AA 14 15. Remove the gas spring to separate the engine hood from the rear chassis. NOTE: engine hood is NOT shown. LEIL16WHL1432AB 15 51428262_EN 14/12/2017 10.1 [10.001] / 8
  • 21. Engine - Engine and crankcase 16. Disconnect the hood wiring harness connector from the rear chassis wiring harness connector. Identify and tag the connectors to aid in reassembly. LEIL15WHL0142AB 16 17. Tag and disconnect the backup alarm connector (1). Remove the two straps cable tie (2). LEIL15WHL0143AB 17 18. Remove the connector (1) from the battery isolator. LEIL16WHL1381AB 18 19. Tag and disconnect the battery to isolator cable (1) and the isolator to starter cable (2) from the battery isolator. Disconnect the connector (3) from the timed discon- nect switch. LEIL16WHL1342AB 19 51428262_EN 14/12/2017 10.1 [10.001] / 9
  • 22. Engine - Engine and crankcase 20. With the assistance of another technician, balance the engine hood and remove the hood hinge mounting bolts (1) near the cab (2) from the cooler frame. Re- peat the procedure for the other side. RAPH12WEL1461AA 20 21. Carefully raise and remove the engine hood from the machine. Lower the engine hood onto a suitable plat- form. Disconnect the lifting equipment from the ex- haust stack (1). LEIL14WHL0400AB 21 22. Loosen the two bolts (2) and the related washers to remove the bracket (1) of the relay decal. LEIL15WHL0195AB 22 23. Tag and disconnect the engine wiring harness con- nector from the air filter sensor (1). Loosen the clamp (2) on the air intake hose (3) and disconnect the hose. LEIL15WHL0196AB 23 51428262_EN 14/12/2017 10.1 [10.001] / 10
  • 23. Engine - Engine and crankcase 24. Tag and disconnect the engine wiring harness con- nector from the air inlet humidity sensor (1). LEIL15WHL0197AB 24 25. Loosen the clamps (2) on the turbocharger. 26. Loosen the clamps (3) on the air filter housing. 27. Loosen the clamp (4) on the crankcase vent hose (5). 28. Remove the intake air hose (1). Cover the tur- bocharger inlet to prevent debris entry. LEIL15WHL0198AB 25 29. Loosen the bolt to separate the P-clamp (of the alter- nate hose) on the engine side of the heat shield. LEIL15WHL0148AA 26 51428262_EN 14/12/2017 10.1 [10.001] / 11
  • 24. Engine - Engine and crankcase 30. Remove the two securing bolts (3), the four washers (4), and two nuts (5). Remove the bracket (2) with the air filter (1) as an assembly. LEIL15WHL0171BB 27 31. Remove the four mounting bolts and the four washers from the belt cover. Remove the cover. LEIL16WHL1311AB 28 LEIL16WHL1362AB 29 51428262_EN 14/12/2017 10.1 [10.001] / 12
  • 25. Engine - Engine and crankcase 32. After removing the belt cover, remove the cover mounting bracket from the right rear side of machine frame. LEIL16WHL1343AB 30 33. If machine is equipped with the air conditioning sys- tem, identify, tag, and disconnect the engine wiring harness connectors from the air compressor clutch connector (1). Recovery the refrigerant, as indicated in Air condi- tioning - Service instruction (50.200). Disconnect the low-pressure line (2) from the suction port and the high-pressure line (3) from the discharge port, lo- cated on the compressor. Immediately install protec- tive caps on the open ports and lines. LEIL16WHL1349AB 31 34. Remove the belt (4). Remove the three mounting bolts (2). Remove the bolt (3) and carefully remove the compressor (1) with the support bracket. LEIL16WHL1380AB 32 35. Remove the drive belt from the engine. LEIL15WHL0192AB 33 51428262_EN 14/12/2017 10.1 [10.001] / 13
  • 26. Engine - Engine and crankcase 36. Loosen the clamp. Remove and discard the O-ring and the air intake tube of the turbocharger. LEIL16WHL1346AB 34 37. Loosen the clamp of the hose of the after cooler inlet and remove the hose. LEIL15WHL0263AB 35 38. Remove the clamp (2) and the clamp (3). Separate the clamp (4) from the bracket of the coolant overflow tank. Loosen the bolts (1) to remove the coolant tank. LEIL15WHL0264AB 36 39. Remove the bolts and the washers (2) to separate the bracket (1) of the overflow tank from the rear plate of the cooling system frame. LEIL15WHL0265AB 37 51428262_EN 14/12/2017 10.1 [10.001] / 14
  • 27. Engine - Engine and crankcase 40. Loosen the bolts (1) and remove the two clamps to separate the SCR sensor wiring harness from the rear chassis. LEIL15WHL0272AB 38 41. Tag and disconnect the SCR sensor connector from the rear chassis harness connector. LEIL16WHL1347AB 39 42. Loosen the hexagonal nut of the temperature sensor (1). Disconnect the temperature sensor (1) on the exhaust pipe (DOC to SCR). 43. Tag and disconnect the wire harness (3) of the rear chassis wiring harness of the temperature sensor (1). Cut the straps (2) that hold the sensor lead. LEIL16WHL1348AB 40 44. Remove the bolts, the washers, and the nuts (3) to separate the bracket (2) of the tube radiator from the muffler support (1). LEIL15WHL0267AB 41 51428262_EN 14/12/2017 10.1 [10.001] / 15
  • 28. Engine - Engine and crankcase 45. Remove the two bolts (1), the four washers (2), and the two nuts (3) to separate the clamps (4) and (6) from the bracket (8). Remove the clamp (4) from the DEF bundle (5). Re- move the clamp (6) from the hose coolant assembly (7). LEIL15WHL0193BB 42 46. Remove the two bolts (4), the washers (5), the spacer (10), and the nut (6) to separate the clamp (3) from the bracket (11). Remove the clamp (3) from the hose coolant assembly (1). 47. Remove the two bolts (8), the washers (9), and the nut (6) to separate the clamp (7) from the bracket (11). Remove the clamp (7) from the DEF bundle (2). LEIL15WHL0261BB 43 51428262_EN 14/12/2017 10.1 [10.001] / 16
  • 29. Engine - Engine and crankcase 48. Drain the engine coolant. Disconnect the hoses (1) from the Dosing Module (2). LEIL15WHL0323AB 44 49. Disconnect the electrical connector (3) from the Dos- ing Module (2). LEIL15WHL0176AA 45 50. Loosen the bolt to remove the P-clamps (1). Discon- nect the return coolant hose (2) and remove it from the machine. LEIL15WHL0270AB 46 51. Loosen the bolt (1) and remove the P-clamp (3) from the supply module support (4). Remove the P-clamp (2). Tag and disconnect the hose (5) from the DEF/ ADBLUE® tank vent filter. LEIL15WHL0269AB 47 51428262_EN 14/12/2017 10.1 [10.001] / 17
  • 30. Thank you very much for your reading. Please Click Here. Then Get COMPLETE MANUAL. NO WAITING NOTE: If there is no response to click on the link above, please download the PDF document first and then click on it.
  • 31. Engine - Engine and crankcase 52. Remove the bolts (2) to remove the DEF/ADBLUE® tank vent filter (1) from the rear plate of the cooling system frame. LEIL15WHL0268AB 48 53. Remove the bolts (2) and washers to remove the bracket (1) from the engine. LEIL15WHL0191AB 49 54. Loosen the clamp (1) to separate the exhaust flap from the inlet DOC pipe. LEIL15WHL0172AB 50 51428262_EN 14/12/2017 10.1 [10.001] / 18
  • 32. Engine - Engine and crankcase 55. Attach a suitable lifting straps to support the muffler support (1) with the Diesel Oxidation Catalyst (DOC) (6) and the Selective Catalytic Reduction muffler (SCR) (7). 56. Remove the bolts (4) and (5) with their related wash- ers to separate the muffler support (1) from the sup- port structures (2) and (3). 57. Remove the muffler support (1), the SCR and the SCR sensor harness as an assembly. NOTE: do not damage the muffler support during removal. LEIL16WHL1345BB 51 58. Tag and disconnect the DEF/ADBLUE® supply and re- turn lines (1) from the supply module. Tag and discon- nect the coolant water supply and return lines (2) from the supply module. Tag and disconnect the wiring har- ness (3) from the supply module. LEIL16WHL1497AB 52 59. Push inward on the fitting retaining clip and discon- nect the coolant outlet (2), the coolant inlet (1) and by-pass (3) lines from the heater control valve. Tag and disconnect the machine wiring harness (4) from the heater control valve. LEIL16WHL1375AB 53 51428262_EN 14/12/2017 10.1 [10.001] / 19
  • 33. Engine - Engine and crankcase 60. Tag and disconnect the fuel filter heater wire (1) and the water sensor (2). Drain the fuel filter and discon- nect the inlet fuel line (3) and outlet fuel line (4) from the fuel filter head. Plug the lines and cap the fittings. LEIL16WHL1374AB 54 61. Remove the fuel line from the top of the ECU (Engine Control Unit). Plug the line and cap the fitting. LEIL15WHL0306AB 55 62. Remove the two bolts (1), the washers, and the nuts to separate the bracket (2) of the supply module from the support (3). Remove the two bolts (4), the washers, and the nuts to separate the bracket (2) of the supply module from the rear chassis. Remove the bracket (2) of the supply module, with the supply module, the DEF/ADBLUE® Heater Control valve and the fuel pre- filter as an assembly. NOTE: pay attention to supply module and heater valve. LEIL16WHL1373AB 56 63. Remove the six bolts (1) and the six washer (2). Re- move the DEF/ADBLUE® storage tank cover (3) lo- cated on the right-hand side of the machine. LEIL15WHL0303AB 57 51428262_EN 14/12/2017 10.1 [10.001] / 20
  • 34. Engine - Engine and crankcase 64. Tag and disconnect the wire harness and DEF/ ADBLUE® supply and return lines from the DEF/ADBLUE® storage tank. Cap the supply lines. LEIL15WHL0304AA 58 65. Remove the bolts (1), the washers, and the nuts to remove the supply module support (2). LEIL15WHL0276AB 59 66. Remove the four bolts (3) and the four washers (4) to remove the support structures (1)from the rear chas- sis (2). LEIL16WHL1344BB 60 51428262_EN 14/12/2017 10.1 [10.001] / 21
  • 35. Engine - Engine and crankcase 67. Loosen the clamp on the intake manifold that secures the after cooler output hose. RAPH12WEL1464AA 61 68. Loosen the clamp (2) on the after cooler and remove the output hose (1) of the after cooler from the inter- cooler. LEIL15WHL0277AB 62 69. Remove the cooling fan screen (3) and the bottom cooling fan screen (2) removing the four bolts (1) and the related nuts. LEIL15WHL0301AB 63 70. Loosen the clamps (1) and (2) to remove the bottom hose coolant (3) from the engine. NOTE: the battery cover plate has been hidden for clarify. LEIL15WHL0278AB 64 51428262_EN 14/12/2017 10.1 [10.001] / 22
  • 36. Engine - Engine and crankcase 71. Cut the tie straps (1) and remove the clamp (4). Sep- arate the breather hose (3) from the radiator hose (2). Loosen clamp (6) from the hose (5). Loosen clamp on the engine then remove the hose (5). LEIL15WHL0279AB 65 72. Remove the nuts (2) from the U-bolt clamp, to sepa- rate the radiator hose (3) from the bracket (1). LEIL15WHL0280AB 66 73. Remove the clamp (1) to disconnect the breather hose (2) from the engine. LEIL15WHL0291AB 67 74. Remove the bolts (1), the washers, and the nuts to re- move the bracket (2) from the rear plate of the cooling system frame. LEIL15WHL0292AB 68 51428262_EN 14/12/2017 10.1 [10.001] / 23