This is a very practical manual

1. Printed in U.S.A.
Copyright © 2012 CNH America LLC. All Rights Reserved.
Case is a registered trademark of CNH America LLC.
Racine Wisconsin 53404 U.S.A.
Part number 84605841
1st edition English
May 2012
SERVICE MANUAL
621F
721F
Tier 4
Wheel Loader
from PIN NBF213602 and above

2. Contents
INTRODUCTION
Engine....................................................................................... 10
Engine and crankcase.................................................................... 10.001
Air cleaners and lines..................................................................... 10.202
Engine lubrication system ................................................................ 10.304
Aftercooler ................................................................................ 10.310
Engine cooling system ................................................................... 10.400
Fan and drive............................................................................. 10.414
Selective Catalytic Reduction (SCR) exhaust treatment ................................. 10.500
Engine generic sub-group ............................................................... 10.AAA
Transmission.............................................................................. 21
Powershift transmission .................................................................. 21.113
Powershift transmission external controls ................................................ 21.135
Powershift transmission internal components ............................................ 21.155
Four-Wheel Drive (4WD) system .................................................. 23
Drive shaft ................................................................................ 23.314
Front axle system ....................................................................... 25
Powered front axle ....................................................................... 25.100
Front bevel gear set and differential...................................................... 25.102
Final drive hub, steering knuckles, and shafts ........................................... 25.108
Rear axle system........................................................................ 27
Powered rear axle ........................................................................ 27.100
Rear bevel gear set and differential ...................................................... 27.106
Planetary and final drives................................................................. 27.120
Brakes and controls .................................................................... 33
Hydraulic service brakes ................................................................. 33.202
Hydraulic systems....................................................................... 35
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3. Hydraulic systems ........................................................................ 35.000
Variable displacement pump ............................................................. 35.106
Pilot system............................................................................... 35.357
Main control valve ........................................................................ 35.359
Auxiliary hydraulic valves and lines ...................................................... 35.525
Front loader arm hydraulic system ....................................................... 35.701
Steering..................................................................................... 41
Auxiliary steering ......................................................................... 41.910
Wheels...................................................................................... 44
Front wheels.............................................................................. 44.511
Cab climate control ..................................................................... 50
Air conditioning ........................................................................... 50.200
Electrical systems....................................................................... 55
Electrical system ......................................................................... 55.000
Fuel tank system ......................................................................... 55.011
Engine cooling system ................................................................... 55.012
Engine control system .................................................................... 55.015
Service brake electrical system .......................................................... 55.030
Parking brake electrical system .......................................................... 55.031
Hydraulic system control ................................................................. 55.036
Steering control system .................................................................. 55.047
Heating, Ventilation, and Air-Conditioning (HVAC) control system....................... 55.050
Cab Heating, Ventilation, and Air-Conditioning (HVAC) controls......................... 55.051
Harnesses and connectors ............................................................... 55.100
Engine starting system ................................................................... 55.201
Cold start aid ............................................................................. 55.202
Alternator ................................................................................. 55.301
Battery .................................................................................... 55.302
External lighting .......................................................................... 55.404
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4. External lighting switches and relays..................................................... 55.405
Warning indicators, alarms, and instruments............................................. 55.408
Loader arm and bucket control system................................................... 55.415
Cab/Platform harnesses and connectors................................................. 55.510
Cab controls .............................................................................. 55.512
Cab lighting............................................................................... 55.514
Wiper/Washer system .................................................................... 55.518
Cab brake controls ....................................................................... 55.519
Cab controls (Lift arm, Boom, Dipper, Bucket) ........................................... 55.524
Selective Catalytic Reduction (SCR) electrical system................................... 55.988
FAULT CODES .......................................................................... 55.DTC
Platform, cab, bodywork, and decals............................................. 90
Pneumatically-adjusted operator seat .................................................... 90.124
Cab ....................................................................................... 90.150
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5. INTRODUCTION
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1

6. Contents
INTRODUCTION
Torque – 621F Torque Specifications ........................................................... 3
621F WE, 621F NA
Torque – 721F Torque Specifications ........................................................... 5
721F WE, 721F NA
Capacities ....................................................................................... 7
621F WE, 621F NA, 721F WE, 721F NA
Consumables - Biodiesel Fuel ................................................................ 12
Hydraulic contamination ...................................................................... 13
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7. INTRODUCTION
Torque – 621F Torque Specifications
621F WE, 621F NA
Axle
Wheel mounting nuts 640 - 720 N·m (472 - 531 lb ft)
Front axle mounting bolts 651 - 678 N·m (480 - 500 lb ft)
Rear axle trunnion pin bolts 325 - 353 N·m (240 - 260 lb ft)
Chassis
Cab mounts 773 - 854 N·m (570 - 630 lb ft)
Exhaust stack to hood 36 - 44 N·m (27 - 32 lb ft)
Counterweight mounting bolts 955 - 1075 N·m (704 - 793 lb ft)
Articulation pivot pin bolts 224 - 278 N·m (165 - 205 lb ft)
Articulation mount pin retainer bolts 69 N·m (51 lb ft)
Seat mounting bolts 73 - 87 N·m (54 - 64 lb ft)
Steering wheel retaining nut 50 N·m (37 lb ft)
Hydraulic oil filter mounting bolts 23 - 27 N·m (17 - 20 lb ft)
Steering cylinder base end pin retaining bolt 290 - 375 N·m (214 - 277 lb ft)
Steering cylinder rod end pin retaining bolt Bolts must turn freely
Horn mounting bolt 53 - 62 N·m (39 - 46 lb ft)
Hood - rear grill bolts 9 - 11 N·m (7 - 8 lb ft)
Hood hinge bolts 65 - 79 N·m (48 - 58 lb ft)
Steps - lower entry strap bolts 27 - 31 N·m (20 - 23 lb ft)
Cooling
Fan to fan hub 40 - 48 N·m (30 - 35 lb ft)
Fan hub to motor shaft (no impact tools) 67 - 74 N·m (49 - 55 lb ft)
Radiator hose clamps 10.1 - 11.3 N·m (7.4 - 8.3 lb ft)
Hydraulic tank cover nuts 14 - 18 N·m (10 - 13 lb ft)
Hydraulic tank sight gauge 2.7 - 5.5 N·m (2.0 - 4.1 lb ft)
Diesel Exhaust Fluid (DEF) System
Heater valve bolts 17 - 19 N·m (13 - 14 lb ft)
Dosing module bolts 7 - 8 N·m (58 - 68 lb in)
DEF control module/pump assembly mounting bolts 20 - 28 N·m (15 - 21 lb ft)
Driveshafts
Coupling to flywheel 53 - 62 N·m (39 - 46 lb ft)
Driveshaft to coupling 53 - 62 N·m (39 - 46 lb ft)
Front driveshaft yoke nut 339 - 373 N·m (250 - 275 lb ft)
Carrier bearing mounting bolts 99 - 128 N·m (73 - 94 lb ft)
550R U-joints 75 - 81 N·m (55 - 60 lb ft)
410R U-joints 61 - 81 N·m (45 - 60 lb ft)
Dust cover mounting bolts 20 - 27 N·m (15 - 20 lb ft)
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8. INTRODUCTION
Engine
Engine mounting brackets 118 - 133 N·m (87 - 98 lb ft)
Engine rubber isolator mounts (Qty 4) 244 - 298 N·m (180 - 220 lb ft)
Brake pump to engine mounting 57 - 65 N·m (42 - 48 lb ft)
Brake pump gear nut (no impact tools) 70 - 79 N·m (52 - 58 lb ft)
Turbo to turbo exhaust elbow clamp 5 N·m (4 lb ft)
Muffler to turbo elbow exhaust clamp 20 - 25 N·m (15 - 18 lb ft)
Front muffler bracket to engine block 118 - 133 N·m (87 - 98 lb ft)
Muffler brackets to muffler 114 - 128 N·m (84 - 94 lb ft)
Charge Air Cooler (CAC) hose clamps (Qty 8) 10.1 - 11.3 N·m (7.4 - 8.3 lb ft)
Air cleaner to turbo hose clamp 10.1 - 11.3 N·m (7.4 - 8.3 lb ft)
Alternator pulley (no impact tools) 60 - 70 N·m (44 - 52 lb ft)
Starter mounting nuts 40 - 50 N·m (30 - 37 lb ft)
Loader
XT loader linkage bolts 650 - 732 N·m (479 - 540 lb ft)
XT guide link nuts 240 - 305 N·m (177 - 225 lb ft)
Loader link pin keeper 325 - 373 N·m (240 - 275 lb ft)
Transmission
Transmission rubber isolator mounts (Qty 3) 890 - 1000 N·m (656 - 738 lb ft)
Transmission upper mounting bracket bolts 251 - 319 N·m (185 - 235 lb ft)
Transmission lower mounting bracket bolts (Qty 2) 481 - 590 N·m (355 - 435 lb ft)
Hydraulic pump to transmission mounting 335 - 375 N·m (247 - 277 lb ft)
Cooler clamps 10.1 - 11.3 N·m (7.4 - 8.3 lb ft)
Hydraulic pump suction hose clamp flange 73 - 90 N·m (54 - 66 lb ft)
Steering priority manifold to pump 37 - 48 N·m (27 - 35 lb ft)
Transmission fill tube bolts 17 - 33 N·m (13 - 24 lb ft)
Transmission sight gauge bolts 2.7 - 5.5 N·m (2 - 4 lb ft)
Wheels
Wheel nuts Initial torque: 298 N·m (220 lb ft)
Final torque: 640 - 720 N·m (472 - 531 lb ft)
RCPH10WHL320AAH 1
Do the following initial and final torque procedures:
1. Tighten wheel nuts to an initial torque of 298 N·m (220 lb ft) in sequence shown in figure
2. Tighten wheel nuts to a final torque of 640 - 720 N·m (472 - 531 lb ft). in sequence shown in figure
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9. INTRODUCTION
Torque – 721F Torque Specifications
721F WE, 721F NA
Axle
Wheel mounting bolts 640 - 720 N·m (472 - 531 lb ft)
Front axle mounting bolts 765 - 855 N·m (564 - 631 lb ft)
Rear axle trunnion pin bolts 651 - 678 N·m (480 - 500 lb ft)
Chassis
Cab mounts 773 - 854 N·m (570 - 630 lb ft)
Exhaust stack to hood 36 - 44 N·m (27 - 32 lb ft)
Counterweight mounting bolts 955 - 1075 N·m (704 - 793 lb ft)
Articulation pivot pin bolts 224 - 278 N·m (165 - 205 lb ft)
Articulation mount pin retainer bolts 69 N·m (51 lb ft)
Seat mounting bolts 73 - 87 N·m (54 - 64 lb ft)
Steering wheel retaining nut 50 N·m (37 lb ft)
Hydraulic oil filter mounting bolts 23 - 27 N·m (17 - 20 lb ft)
Steering cylinder base end pin retaining bolt 290 - 375 N·m (214 - 277 lb ft)
Steering cylinder rod end pin retaining bolt Bolts must turn freely
Horn mounting bolt 53 - 62 N·m (39 - 46 lb ft)
Hood - rear grill bolts 9 - 11 N·m (7 - 8 lb ft)
Hood hinge bolts 65 - 79 N·m (48 - 58 lb ft)
Steps - lower entry strap bolts 27 - 31 N·m (20 - 23 lb ft)
Cooling
Fan to fan hub 40 - 48 N·m (30 - 35 lb ft)
Fan hub to motor shaft (no impact tools) 67 - 74 N·m (49 - 55 lb ft)
Radiator hose clamps 10.1 - 11.3 N·m (7.4 - 8.3 lb ft)
Hydraulic tank cover nuts 14 - 18 N·m (10 - 13 lb ft)
Hydraulic tank sight gauge 2.7 - 5.5 N·m (2.0 - 4.1 lb ft)
Diesel Exhaust Fluid (DEF) System
Heater valve bolts 17 - 19 N·m (13 - 14 lb ft)
Dosing module bolts 7 - 8 N·m (58 - 68 lb in)
DEF control module/pump assembly mounting bolts 20 - 28 N·m (15 - 21 lb ft)
Driveshafts
Coupling to flywheel 53 - 62 N·m (39 - 46 lb ft)
Driveshaft to coupling 53 - 62 N·m (39 - 46 lb ft)
Front driveshaft yoke nut 339 - 373 N·m (250 - 275 lb ft)
Carrier bearing mounting bolts 99 - 128 N·m (73 - 94 lb ft)
550R U-joints 75 - 81 N·m (55 - 60 lb ft)
Dust cover mounting bolts 20 - 27 N·m (15 - 20 lb ft)
Flex plate to flywheel bolts 33 - 41 N·m (24 - 30 lb ft)
Carrier bearing bolt 150 - 164 N·m (111 - 121 lb ft)
Drive line mounting bolts 136 - 149 N·m (100 - 110 lb ft)
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10. INTRODUCTION
Engine
Engine mounting brackets 118 - 133 N·m (87 - 98 lb ft)
Engine rubber isolator mounts (Qty 4) 244 - 298 N·m (180 - 220 lb ft)
Brake pump to engine mounting 57 - 65 N·m (42 - 48 lb ft)
Brake pump gear nut (no impact tools) 70 - 79 N·m (52 - 58 lb ft)
Turbo to turbo exhaust elbow clamp 5 N·m (4 lb ft)
Muffler to turbo elbow exhaust clamp 20 - 25 N·m (15 - 18 lb ft)
Muffler bracket to muffler 114 - 128 N·m (84 - 94 lb ft)
Charge Air Cooler (CAC) hose clamps (Qty 8) 10.1 - 11.3 N·m (7.4 - 8.3 lb ft)
Air cleaner to turbo hose clamp 10.1 - 11.3 N·m (7.4 - 8.3 lb ft)
Alternator pulley (no impact tools) 60 - 70 N·m (44 - 52 lb ft)
Starter mounting nuts 40 - 50 N·m (30 - 37 lb ft)
Loader
XT loader linkage bolts 650 - 732 N·m (479 - 540 lb ft)
XT guide link nuts 240 - 305 N·m (177 - 225 lb ft)
Loader link pin keeper 325 - 373 N·m (240 - 275 lb ft)
Transmission
Transmission rubber isolator mounts (Qty 3) 890 - 1000 N·m (656 - 738 lb ft)
Transmission upper mounting bracket bolts 251 - 319 N·m (185 - 235 lb ft)
Transmission lower mounting bracket bolts (Qty 2) 481 - 590 N·m (355 - 435 lb ft)
Cooler clamps 10.1 - 11.3 N·m (7.4 - 8.3 lb ft)
Hydraulic pump suction hose clamp flange 73 - 90 N·m (54 - 66 lb ft)
Steering priority manifold to pump 37 - 48 N·m (27 - 35 lb ft)
Transmission fill tube bolts 17 - 33 N·m (13 - 24 lb ft)
Transmission sight gauge bolts 2.7 - 5.5 N·m (2 - 4 lb ft)
Wheels
Wheel bolts Initial torque: 298 N·m (220 lb ft)
Final torque: 640 - 720 N·m (472 - 531 lb ft)
RCPH10WHL320AAH 1
Do the following initial and final torque procedures:
1. Tighten wheel bolts to an initial torque of 298 N·m (220 lb ft) in sequence shown in figure
2. Tighten wheel bolts to a final torque of 640 - 720 N·m (472 - 531 lb ft). in sequence shown in figure
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11. INTRODUCTION
Capacities
621F WE, 621F NA, 721F WE, 721F NA
621F Capacities and Specifications
Engine
Type of oil CASE AKCELA ENGINE OIL 15W-40
Capacity (with filter change) 13.25 l (14.0 US qt)
Total system capacity 15.1 l (16 US qt)
Cooling System
System capacity 26.8 l (28.4 US qt)
Hydraulic System
Type of fluid CASE AKCELA HY-TRAN® ULTRA™ HYDRAULIC TRANSMISSION
OIL
Total system capacity 147.6 l (39.0 US gal)
Reservoir capacity 90.8 l (24.0 US gal)
Fuel System
System capacity 246 l (65.0 US gal)
Transmission
Type of oil CASE AKCELA NEXPLORE™ FLUID
Service capacity (with filter change) 26.7 l (28.2 US qt)
Axles
Type of oil CASE AKCELA NEXPLORE™ FLUID
Standard front axle 22 l (23.2 US qt)
Standard rear axle 22 l (23.2 US qt)
Optional front axle 35 l (37.0 US qt)
Optional rear axle 35 l (37.0 US qt)
Diesel Exhaust Fluid (DEF)
Total capacity 41.3 l (10.9 US gal)
Grease Fittings
As required CASE AKCELA MOLY GREASE
NOTE: Machines are shipped from the factory with break-in oil.
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12. INTRODUCTION
721F Capacities and Specifications
Engine
Type of oil CASE AKCELA ENGINE OIL 15W-40
Capacity (with filter change) 13.25 l (14.0 US qt)
Total system capacity 15.1 l (16 US qt)
Cooling System
System capacity 28.4 l (30.0 US qt)
Hydraulic System
Type of fluid CASE AKCELA HY-TRAN® ULTRA™ HYDRAULIC TRANSMISSION
OIL
Total system capacity 177.8 l (47.0 US gal)
Reservoir capacity 90.8 l (24.0 US gal)
Fuel System
System capacity 253 l (66.8 US gal)
Transmission
Type of oil CASE AKCELA NEXPLORE™ FLUID
Service capacity (with filter change) 34 l (35.9 US qt)
Axles
Type of oil CASE AKCELA NEXPLORE™ FLUID
Standard front axle 35 l (37.0 US qt)
Standard rear axle 23 l (24.3 US qt)
Optional front axle 35 l (37.0 US qt)
Optional rear axle 35 l (37.0 US qt)
Diesel Exhaust Fluid (DEF)
Total capacity 41.3 l (10.9 US gal)
Grease Fittings
As required CASE AKCELA MOLY GREASE
NOTE: Machines are shipped from the factory with break-in oil.
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13. INTRODUCTION
Engine Oil Viscosity/Temperature Range
RCPH11WHL023FAH 1
NOTE: Use of an engine oil pan heater or an engine coolant heater may be required when operating temperatures
are in Winter or Arctic conditions.
Transmission Oil Viscosity/Temperature Range
RCPH10WHL453BAH 2
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14. INTRODUCTION
Hydraulic/Brake System Temperature Range
RCPH10WHL006EAL 3
Coolant Solution
Only use ethylene-glycol coolant solution in the cooling system. Use good quality ethylene-glycol that has a high
boiling point with no additives to prevent leakage. Do not use non-approved anti-rust additives.
NOTICE: Anti-rust additives and ethylene-glycol can mix and work against each other, reducing anti-corrosion pro-
tection, forming deposits in the cooling system, and causing damage to the cooling system and radiator. Contact your
dealer who can supply you with the suitable coolant solution.
Anti-freeze/Anti-corrosion
Use anti-freeze in all seasons to protect the cooling system from corrosion and risk of freezing. For areas where the
ambient temperature is over -36 °C (-32.8 °F) use a blend of 50 % ethylene-glycol based anti-freeze.
For areas where the temperature is below -36 °C (-32.8 °F)- it is advisable to use a blend of 40 % water and 60 %
anti-freeze.
Fuel
• Use diesel fuel suitable for the ambient temperature conditions (ASTM-D-975).
• Use fuel which is to ASTM (American Society for Testing and Materials) D975 standard.
• Use grade No. 2 fuel. The use of other types of fuel can result in a loss of power of the engine and may cause
high fuel consumption.
• For very low ambient temperatures, use a mixture of fuels No. 1 and No. 2 as necessary. Consult your fuel
supplier for appropriate fuel supply.
• If the temperature falls below the fuel cloud point (point at which wax begins to form, the wax crystals will cause
power loss or will prevent the engine from starting.
• In cold weather, fill the fuel tank at the end of the day's work in order to prevent the formation of condensation.
Fuel Storage
Prolonged storage of fuel can lead to the accumulation of impurities and condensation in the fuel. Engine trouble can
often be traced to the presence of water in the fuel.
The storage tank must be placed outside and the temperature of the fuel should be kept as low as possible. Drain off
water and impurities regularly.
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15. INTRODUCTION
Hydraulic Fluid
CASE AKCELA HY-TRAN® ULTRA™ HYDRAULIC TRANSMISSION OIL is specifically designed for high pressure applica-
tions and for Case hydraulic systems. Your Case Dealer can provide hydraulic fluid to fulfill different climate/temper-
ature conditions. Refer to the charts at the beginning of this section.
Transmission Component Oil
Extreme pressure oil should be used for enclosed transmission components. Choose an oil that is manufactured for
your climate/temperature conditions such as CASE AKCELA NEXPLORE™ FLUID. See charts at the beginning of this
section.
Grease
The type of grease to use depends on ambient temperature such as: CASE AKCELA MOLY GREASE.
Environment
Before servicing machine and disposing oil, fluids, and lubricants, follow all environmental regulations. Do not drain
oil or fluids on to the ground or into containers that leak. Check with your local environmental recycling center or your
dealer for correct disposal information.
Engine Oil
CASE AKCELA ENGINE OIL 15W-40 is recommended for
your engine. This oil insures correct lubrication of your en-
gine in all working conditions. See charts at the beginning
of this section to choose the correct oil for climate/temper-
atures.
If CASE AKCELA ENGINE OIL 15W-40 cannot be obtained,
use only oil of the API SERVICE CI-4 category.
NOTE: Do not put any Performance Additive or other ad-
ditive in the sump. Oil change intervals shown in this man-
ual are based on tests carried out utilizing Case lubricants. RCPH10WHL012AAD 4
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16. INTRODUCTION
Consumables - Biodiesel Fuel
Fatty Acid Methyl Ester Biodiesel (Biodiesel Fuel) consists of a family of fuels derived from vegetable oils treated with
methyl esters.
NOTICE: Biodiesel fuel blends are approved for your engine only if they comply with Specification Standards EN
14214 or ASTM D6751.
NOTICE: Verify with your local dealer which blends are approved for your engine. Use of biodiesel fuel that does not
comply with the Standards EN14214 or ASTM D6751 could lead to severe damage to engine and fuel system. Use
of non-approved biodiesel fuels may void warranty coverage.
Biodiesel Fuel Usage Conditions
Biodiesel fuels must be purchased from a trusted supplier that understands the product and maintains good fuel
quality. Biodiesel fuels must be pre-blended by the supplier. Mixing biodiesel fuels on site can result in an incorrect
mixture which can damage engine and fuel system.
Engine performance is effected by the use of biodiesel fuels. There may be up to 12 percent reduction in power or
torque depending on the blend used.
NOTICE: DO NOT modify the engine and/or fuel injection pump settings to recover reduced performance.
The reduced power must be accepted if using any biodiesel fuel blends.
NOTICE: The use of high biodiesel fuel blends is not recommended in cold weather conditions.
Using biodiesel fuels may require changing engine oil, engine oil filters, and fuel filter elements more frequently.
Biodiesel fuels can remove rust and other particles that adhere to the inside of the fuel tank. These particles are
trapped by vehicle filters and may cause shortened filter life or filter blockages. Blockages are more common in cold
weather conditions. Consult your dealer for information on cold weather operation and proper maintenance intervals
when using any biodiesel fuel blend.
Biodiesel fuel may degrade natural rubber gaskets and hoses, as it is more solvent than petro-diesel. Frequently
inspect hoses and other engine components when using biodiesel fuel.
DO NOT allow water to collect in the fuel or storage tanks. Biodiesel fuel attracts moisture from the atmosphere.
Keep fuel tanks and storage tanks as full as possible to limit the amount of air and water vapors. It may be necessary
to drain machine fuel filter more frequently. Potential oxidation and stability could create a problem with fuel stored in
the machine.
Biodiesel Storage
NOTICE: DO NOT store machines for more than three months with biodiesel blends in the fuel system. DO NOT
store biodiesel fuel in on-site storage tanks for more than three months.
If long periods of storage are required, run the machine for 20 hours using regular diesel fuel to flush the biodiesel
fuel from the engine fuel system.
NOTICE: Biodiesel fuels must not be stored in on-site storage tanks for more than 3 months. Any spillage of biodiesel
fuels must be cleaned up immediately before it can cause damage to the environment or the paint finish of the ma-
chine. Before using biodiesel fuel blends, you should consult with your dealer to receive full information about the
approved blend for your machine and any detailed conditions of its usage. Failure to follow the requirements and
conditions of biodiesel fuel usage will void your machine’s warranty.
NOTE: B7 is the highest biodiesel (7% blend) that should be used in this machine.
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17. INTRODUCTION
Hydraulic contamination
Contamination in the hydraulic system is a major cause of the malfunction of hydraulic components. Contamination
is any foreign material in the hydraulic oil. Contamination can enter the hydraulic system in several ways.
(A) When you drain the oil or disconnect any line.
(B) When you disassemble a component.
(C) From normal wear of the hydraulic components.
(D) From damaged or worn seals.
(E) From a damaged component in the hydraulic system.
All hydraulic systems operate with some contamination. The design of the components in this hydraulic system per-
mits efficient operation with a small amount of contamination. An increase in this amount of contamination can cause
problems in the hydraulic system. The following list includes some of these problems.
(A) Cylinder rod seals leak.
(B) Control valve spools do not return to neutral.
(C) Movement of control valve spools is difficult.
(D) Hydraulic oil becomes too hot.
(E) Pump gears, housing, and other parts wear rapidly.
(F) Relief valves or check valves held open by dirt.
(G) Quick failure of components that have been repaired.
(H) Cycle times are slow; machine does not have enough power.
If your machine has any of these problems, check the hydraulic oil for contamination. There are two types of contam-
ination, microscopic and visible.
Microscopic contamination occurs when very fine particles of foreign material are in suspension in the hydraulic oil.
These particles are too small to see or feel. Microscopic contamination can be found by identification of the following
problems or by testing in a laboratory. Examples of the problems:
(A) Cylinder rod seal leak.
(B) Control valve spools do not return to NEUTRAL.
(C) The hydraulic system has a high operating temperature.
Visible contamination is foreign material that can be found by sight, touch, or odor. Visible contamination can cause
a sudden failure of components. Examples of visible contamination:
(A) Particles of metal or dirt in the oil.
(B) Air in the oil.
(C) The oil is dark and thick.
(D)The oil has an odor of burned oil.
(E) Water in the oil.
If you find contamination, use a Portable Filter to clean the hydraulic system.
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18. CONSUMABLES INDEX
Consumable IU PAGE
CASE Akcela Engine oil
15W-40
Capacities 7
CASE Akcela HY-TRAN®
Ultra™ hydraulic transmission
oil
Capacities 7
CASE Akcela NEXPLORE™
fluid
Capacities 7
CASE Akcela NEXPLORE™
fluid
Capacities 7
CASE Akcela Moly grease Capacities 7
CASE Akcela Engine oil
15W-40
Capacities 8
CASE Akcela HY-TRAN®
Ultra™ hydraulic transmission
oil
Capacities 8
CASE Akcela NEXPLORE™
fluid
Capacities 8
CASE Akcela NEXPLORE™
fluid
Capacities 8
CASE Akcela Moly grease Capacities 8
CASE Akcela HY-TRAN®
Ultra™ hydraulic transmission
oil
Capacities 11
CASE Akcela NEXPLORE™
fluid
Capacities 11
CASE Akcela Moly grease Capacities 11
CASE Akcela Engine oil
15W-40
Capacities 11
CASE Akcela Engine oil
15W-40
Capacities 11
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19. SERVICE MANUAL
Engine
621F
721F
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20. Contents
Engine - 10
Engine and crankcase...................................................................... 10.001
621F , 721F
Air cleaners and lines....................................................................... 10.202
621F , 721F
Engine lubrication system .................................................................. 10.304
621F , 721F
Aftercooler .................................................................................. 10.310
621F , 721F
Engine cooling system ..................................................................... 10.400
621F , 721F
Fan and drive............................................................................... 10.414
621F , 721F
Selective Catalytic Reduction (SCR) exhaust treatment ................................... 10.500
621F NA, 621F WE, 721F NA, 721F WE
Engine generic sub-group ................................................................. 10.AAA
621F , 721F
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21. CONSUMABLES INDEX
Consumable IU PAGE
DEF/AdBlue® Engine - Remove 10.001 / 22
DEF/AdBlue® Engine - Remove 10.001 / 22
DEF/AdBlue® Engine - Remove 10.001 / 23
DEF/AdBlue® Engine - Remove 10.001 / 23
DEF/AdBlue® Engine - Remove 10.001 / 23
DEF/AdBlue® Engine - Install 10.001 / 33
DEF/AdBlue® Engine - Install 10.001 / 33
DEF/AdBlue® Engine - Install 10.001 / 34
DEF/AdBlue® Engine - Install 10.001 / 34
DEF/AdBlue® Engine - Install 10.001 / 35
CASE Akcela Engine oil
15W-40
Engine - Install 10.001 / 50
Loctite® 242 Radiator - Install 10.400 / 16
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 20
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 20
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 20
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 21
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 21
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 21
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 22
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 22
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 24
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 24
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 25
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 25
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 26
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 27
DEF/AdBlue® Diesel Exhaust Fluid 10.500 / 27
DEF/AdBlue® Coolant control valve - Remove 10.500 / 29
DEF/AdBlue® Coolant control valve - Remove 10.500 / 29
DEF/AdBlue® Coolant control valve - Install 10.500 / 31
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23. Engine - 10
Engine and crankcase - 001
621F
721F
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24. Contents
Engine - 10
Engine and crankcase - 001
SERVICE
Engine
Remove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
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25. CONSUMABLES INDEX
Consumable IU PAGE
DEF/AdBlue® Engine - Remove 10.001 / 22
DEF/AdBlue® Engine - Remove 10.001 / 22
DEF/AdBlue® Engine - Remove 10.001 / 23
DEF/AdBlue® Engine - Remove 10.001 / 23
DEF/AdBlue® Engine - Remove 10.001 / 23
DEF/AdBlue® Engine - Install 10.001 / 33
DEF/AdBlue® Engine - Install 10.001 / 33
DEF/AdBlue® Engine - Install 10.001 / 34
DEF/AdBlue® Engine - Install 10.001 / 34
DEF/AdBlue® Engine - Install 10.001 / 35
CASE Akcela Engine oil
15W-40
Engine - Install 10.001 / 50
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26. 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 machine on a level surface and lower the bucket
to the ground. Put articulation lock in LOCKED posi-
tion and stop the engine.
RCPH10WHL063BAL 1
2. Actuate the brake pedal several times to discharge
brake accumulators.
RCPH10WHL435AAH 2
3. Put key switch in ON position. Pilot control switch
must be in the ON position and then move loader
control lever(s) back and forth at least 30 times to
release any pressure from hydraulic circuit. Put key
switch in OFF position.
RCPH10WHL119BAL 3
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27. Engine - Engine and crankcase
4. Raise grill located above the cooler box just behind
the cab. Then slowly loosen the hydraulic reservoir
filler cap to release pressure in the reservoir.
RCPH10WHL099BAL 4
5. Locate the master and hood raise switch by the bat-
tery box. Then raise the hood and put the master
disconnect switch in the OFF position.
RCPH10WHL106AAH 5
6. Raise both side panels (1). Then remove the thumb
screws (2) and inner fender panels (3).
NOTE: Left side of the machine is shown. The operation
is similar for the right side.
RAPH12WEL0597AA 6
7. Place a suitable container below radiator drain, re-
move radiator cap and coolant drain plug (arrow) to
drain engine coolant. Then reinstall drain plug and
radiator cap after coolant has drained.
NOTE: See machine specifications for cooling system vol-
ume.
RCPH10WHL054BAL 7
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28. Engine - Engine and crankcase
8. Place a suitable container below engine oil drain.
Remove drain plug and drain oil into container. Then
reinstall drain plug.
NOTE: See machine specifications for engine oil sump vol-
ume.
RCPH10WHL054BAL 8
9. After oil drains, disconnect drain hose from frame by
removing jam nut (1). Then pull hose from frame in
preparation for engine removal. (2)
RAPH12WEL0598AA 9
10. Double up a nylon lifting strap (1) and slide through
the exhaust stack (2) on the hood.
RAPH12WEL0599AA 10
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29. Engine - Engine and crankcase
11. Place a bar or pipe through the strap loop inside the
hood and attach the strap to a suitable lifting device.
Then raise the hood with the strap to release tension
on the lifting motor.
RAPH12WEL0600AA 11
12. Tag and disconnect the camera wire harness (if ma-
chine is equipped with a camera.)
RAPH12WEL0601AA 12
13. Cut wire ties and remove camera wire harness from
hood. Then place it off to the side in a safe location.
(If machine is equipped with a camera.)
RAPH12WEL0602AA 13
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30. Engine - Engine and crankcase
14. Remove mount bolt (1) and backup alarm wiring har-
ness clamp from cooler housing. Then tag and re-
move hood ground wire (2) from cooler housing.
RAPH12WEL0603AA 14
15. Tag and disconnect hood wiring harness connector
from rear chassis wiring harness connector.
RAPH12WEL0604AA 15
16. Have another person balance the hood and
LOOSEN the hood hinge mounting bolts (arrows)
from the cooler frame.
NOTE: Do not remove the hood hinge mounting bolts at
this time.
RAPH12WEL0605AA 16
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31. Engine - Engine and crankcase
17. Remove the pin from the bottom of the lifting motor
cylinder where it attaches to the loader frame.
RAPH12WEL0606AA 17
18. Put the master disconnect switch in the ON position.
Then, retract the lifting motor cylinder (2), replace pin
and disconnect wiring harness (1).
RAPH12WEL0062AA 18
19. Put master disconnect switch (1) in OFF position.
Remove the battery cover and disconnect ground
lead from the batteries (2). You may replace battery
cover if desired to give you a place to stand.
RAPH12WEL0608AA 19
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32. Engine - Engine and crankcase
20. Have another person balance the hood and remove
the hood hinge mounting bolts (arrows) from the
cooler frame.
RAPH12WEL0605AA 20
21. Carefully raise and remove hood from loader. Lower
hood onto suitable platform and disconnect lifting
equipment.
NOTE: Radiator overflow hose may interfere with left hand
hood hinge movement and hood removal.
RAPH12WEL0609AA 21
22. Tag and disconnect engine wiring harness connector
from air filter restriction switch.
RAPH12WEL0610AA 22
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33. Engine - Engine and crankcase
23. Tag and disconnect engine wiring harness connector
from air inlet humidity sensor.
RAPH12WEL0611AA 23
24. Loosen clamp (1) on the crankcase ventilation hose
(2) and disconnect hose.
RAPH12WEL0612AA 24
25. Loosen clamps on turbocharger and air filter hous-
ing. Then remove the intake air hose. Cover tur-
bocharger inlet to prevent debris entry.
RAPH12WEL0613AA 25
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34. Engine - Engine and crankcase
26. Loosen the clamp on the turbocharger for the after
cooler inlet elbow.
RAPH12WEL0614AA 26
27. Loosen the clamp on the hose at the after cooler inlet
and remove the tube.
RAPH12WEL0615AA 27
28. Loosen clamp on the air inlet hose at the air filter
housing.
RAPH12WEL0616AA 28
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35. Engine - Engine and crankcase
29. Remove bolts from the cooler box (1) and the cen-
ter support bracket (2) securing the air inlet hose
bracket. Then remove air inlet hose and bracket.
RAPH12WEL0617AA 29
30. Remove four the bolts securing the air filter housing
to the mounting support bracket. Then remove air
filter housing.
RAPH12WEL0618AA 30
31. Remove the four mounting bolts from the belt cover.
Then remove the cover.
NOTE: After removing the belt cover, remove the cover
mounting bracket from the left rear side of machine frame.
RAPH12WEL0619AA 31
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36. Engine - Engine and crankcase
32. Remove the drive belt from the engine.
RAPH12WEL0620AA 32
33. If loader is equipped with air conditioning, identify,
tag, and disconnect the engine wiring harness con-
nectors from air compressor clutch connector (1) and
high pressure switch (2). Then remove the three
mounting bolts (3) for the compressor and carefully
set it on the left battery cover.
RAPH12WEL0621AA 33
34. Tag and disconnect the wiring from the alternator.
RAPH12WEL0622AA 34
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37. Engine - Engine and crankcase
35. Remove SCR coolant return line.
RAPH12WEL0623AA 35
36. Tag and remove the wires from the starter solenoid
(1), the ground cable (2), and ground strap (3) from
the starter.
NOTE: Move the starter cables away from the engine.
RAPH12WEL0624AA 36
37. Remove bolts securing wiring harness clamps to en-
gine.
RAPH12WEL0625AA 37
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38. Engine - Engine and crankcase
38. Remove ground wires from the engine.
NOTE: Move the wiring harness away from the engine.
RAPH12WEL0625AA 38
39. If the machine is so equipped, unplug the engine
block heater and set it aside.
RAPH12WEL0626AA 39
40. Loosen the exhaust clamp from the turbocharger.
RAPH12WEL0627AA 40
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39. Suggest:
If the above button click is invalid.
Please download this document
first, and then click the above link
to download the complete manual.
Thank you so much for reading

40. Engine - Engine and crankcase
41. Disconnect the engine coolant vent hose from the
engine.
RAPH12WEL0628AA 41
42. Loosen clamps and remove lower coolant hose from
the engine.
RAPH12WEL0629AA 42
43. Remove the radiator hose from the engine.
RAPH12WEL0630AA 43
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