Caterpillar cat 301.8 mini hydraulic excavator (prefix 3 yw) service repair manual (3yw00001 and up)

Service Repair Manual
Models
301.5 301.6 301.8
Mini Hydraulic Excavator

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Product: MINI HYD EXCAVATOR
Model: 301.5 MINI HYD EXCAVATOR 3YW
Configuration: 301.5 301.6 301.8 Mini Hydraulic Excavator 3YW00001-UP (MACHINE) POWERED BY 3003 Engine
Disassembly and Assembly
301.5, 301.6 and 301.8 Mini-Hydraulic Excavator Engine Supplement
Media Number -RENR2803-01 Publication Date -01/05/2005 Date Updated -11/05/2005
i00914441
Engine and Pumps - Install
SMCS - 1017-012; 1024-012
Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 6V-2157 Link Bracket 2
Personal injury can result from hydraulic oil pressure and hot oil.
Hydraulic oil pressure can remain in the hydraulic system after the
engine has been stopped. Serious injury can be caused if this pressure is
not released before any service is done on the hydraulic system.
Make sure all of the attachments have been lowered, oil is cool before
removing any components or lines. Remove the oil filler cap only when
the engine is stopped, and the filler cap is cool enough to touch with
your bare hand.
At operating temperature, the engine coolant is hot and under pressure.
1/11301.5 301.6 301.8 Mini Hydraulic Excavator 3YW00001-UP (MACHINE) POWERE...
2020/4/19https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

Steam can cause personal injury.
Check the coolant level only after the engine has been stopped and the
fill cap is cool enough to touch with your bare hand.
Remove the fill cap slowly to relieve pressure.
Cooling system conditioner contains alkali. Avoid contact with the skin
and eyes to prevent personal injury.
Illustration 1 g00489663
1. Apply suitable lifting chains to the lifting points on the engine. Apply enough tension on the
chains in order to support the weight of the engine.
2. Lower the engine and pumps into position in the engine compartment. The weight of the
engine and pumps is 125 kg (275 lb) .

3. Install six bolts and washers (44) . The other three bolts are located on the rear of the
engine.
4. Install two nuts and two washers (43) .
5. Install electrical clip (42) .
6. Install the bolt and washer (41) .

7. Install the exhaust manifold and install four nuts (40) .
8. Install ground cable (39) .
9. Install clip (38) .
11. Install nut (36) .

12. Install hose (35) and tighten the hose clamp.
13. Install two hoses (34) .
14. Install two electrical clips (33) .
15. Install the two bolts and washers (32) .

16. Install plate assembly (31) .
17. Install the wires. Install two bolts and washers (30) .
18. Install two bolts and washers (29) .
19. Install electrical reset (28) and install two bolts.
20. Install battery (27) .
21. Install battery bracket (26) .
23. Connect the battery cables.
24. Install hose (24) .

25. Install hose (23) .
26. Tighten hose clamp (22) .
27. Place the engine throttle cable in position and tighten nut (21) .
28. Install pin (20) and install clip (19) .

29. Install wire (18) and install nut (17) .
30. Install wire (16) and install bolt (15) .
31. Install two hoses (14) and tighten two hose clamps (13) .

Note: The seat is removed for photographic purposes.
32. Install tooling (A) and apply suitable lifting straps.
33. Install wall plate assembly (12) .
35. Install three bolts and washers (10) .

37. Install three bolts and washers (8) .
38. Remove fuel tank cap (4) and install side panel (7) .
40. Install bolt (5) .
41. Install fuel tank cap (4) .
10/11301.5 301.6 301.8 Mini Hydraulic Excavator 3YW00001-UP (MACHINE) POWER...

42. Install left side corner protector (3) .
43. Tighten two bolts (2) .
44. Install the two bolts and washers (1) .
,,,,,
End By:
a. Install the cab. Refer to Disassembly and AssemblyRENR2808, "Cab - Install" .
b. Install the alternator. Refer to Disassembly and AssemblyRENR2803, "Alternator - Remove
and Install" .
c. Install the electric starting motor. Refer to Disassembly and AssemblyRENR2803, "Electric
Starting Motor - Remove and Install" .
d. Install the radiator. Refer to Disassembly and AssemblyRENR2803, "Radiator and Fan -
Remove and Install" .
e. Install the hood. Refer to Disassembly and AssemblyRENR2803, "Hood - Remove and
Install" .
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sun Apr 19 18:58:12 UTC+0800 2020
11/11301.5 301.6 301.8 Mini Hydraulic Excavator 3YW00001-UP (MACHINE) POWER...

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3003, 3013, 3014 and 3024 Engines for Caterpillar Built Machines
Media Number -SENR5027-05 Publication Date -01/05/2005 Date Updated -16/05/2005
i01783524
Fuel Filter Base - Remove
SMCS - 1262-011
Removal Procedure
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.

Typical example
1. Remove fuel filter (5) from the fuel filter base, as follows:
a. Remove the collar and cap (1) from the top of fuel filter base (2). This will help
prevent spillage of fuel from the fuel filter.
b. Hold fuel filter (5) while locking collar (4) is turned in the counterclockwise
direction.
c. Pull fuel filter (5) from fuel filter base (2) and remove locking collar (4) .
2. Disconnect fuel line (3) from fuel filter base (2). Plug all openings or cap all openings
immediately in order to help prevent contamination.
Typical example
3. Remove two bolts (6) that fasten fuel filter base (2) to the mounting bracket.
4. Remove fuel filter base (2) from the mounting bracket.

Note: Some engines may have a hand priming pump on the fuel filter base. Refer to the
Disassembly and Assembly, "Fuel Filter Base - Disassemble" topic for information on
removing the hand priming pump.
Sun Apr 19 18:59:31 UTC+0800 2020

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i01783533
Fuel Filter Base - Disassemble
SMCS - 1262-015
Disassembly Procedure
Hand Priming Pump (if equipped)

Hand Priming Pump
(1) Cap ring
(2) Priming button
(3) Diaphragm
(4) Spring cap
(5) Spring
(6) Valve plate
(7) O-ring seal
(8) Fuel filter base
1. Unscrew cap ring (1) from fuel filter base (8).

Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
2. Remove priming button (2) and diaphragm (3) from spring cap (4). Inspect the rubber
diaphragm (3) for cracks or for wear. If the diaphragm is worn or damaged, use a new part
for replacement.
3. Remove spring cap (4) and spring (5) from valve plate (6) .
4. Remove valve plate (6) from fuel filter base (8).
Sun Apr 19 19:00:28 UTC+0800 2020

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i01783534
Fuel Filter Base - Assemble
SMCS - 1262-016
Assembly Procedure
Hand Priming Pump (if equipped)

Hand Priming Pump
(1) Cap ring
(2) Priming button
(3) Diaphragm
(4) Spring cap
(5) Spring
(6) Valve plate
(7) O-ring seal
(8) Fuel filter base
1. Apply a thin film of clean engine oil to O-ring seal (7) and to valve plate (6) .

2. Insert valve plate (6) into fuel filter base (8). The valve plate must be installed with the O-
ring (7) first. Ensure that the rubber valve extends through the center hole of fuel filter base
(8). Push valve plate (6) firmly into the correct position.
Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
3. Install spring (5) into valve plate (6) and place spring cap (4) on top of the spring.
4. Install rubber diaphragm (3) into priming button (2). Ensure that diaphragm (3) fits firmly
into the correct position. Place the assembly over spring cap (4) .
5. Install cap ring (1) over priming button (2). Depress priming button (2) until diaphragm (3)
is seated firmly onto fuel filter base (8). Tighten cap ring (1) hand tight while the priming
button (2) is depressed.
6. Prime the fuel system. Refer to Testing and Adjusting, "Fuel System - Prime" for more
information.
Sun Apr 19 19:01:24 UTC+0800 2020

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i01783535
Fuel Filter Base - Install
SMCS - 1262-012
Installation Procedure
NOTICE
Typical example
1. Put fuel filter base (2) in position on the mounting bracket.

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2. Install two bolts (6) that fasten the fuel filter base to the mounting bracket.
Typical example
3. Remove the cap or the plug and connect fuel line (3) to fuel filter base (2) .
4. Install fuel filter (5) on fuel filter base (2), as follows:
a. Replace the seal on fuel filter base (2) .
b. Insert fuel filter (5) in fuel filter base (2) .
c. Install collar (4) on the fuel filter and turn the collar in the clockwise direction in
order to lock fuel filter (5) on the fuel filter base. The locking collar is hand tightened
only.
d. Insert cap (1) into the top of fuel filter base (2). Install the collar that holds the cap
into position.
Note: Some engines may have a hand priming pump on the fuel filter base. Refer to the
Disassembly and Assembly Module, "Fuel Filter Base - Assemble" topic for information on
installing the hand priming pump.
Sun Apr 19 19:02:21 UTC+0800 2020

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i01590349
Fuel Transfer Pump - Remove
SMCS - 1256-011
Removal Procedure
NOTICE
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.

1. Loosen hose clamps and remove the two fuel lines from fuel transfer pump (1) .
2. Remove two bolts (4) that fasten fuel transfer pump (1) to the cylinder block.
Note: Before removing the fuel transfer pump (1) from the cylinder block, note the position
of the flange (2) of the fuel transfer pump (1) for assembly.
3. Remove fuel transfer pump (1) and O-ring (3). Replace the O-ring when you install the fuel
transfer pump.
Note: In order to remove the fuel transfer pump from the engine, it may be necessary to
rotate the crankshaft until the rocker arm of the fuel transfer pump is not under pressure.
Sun Apr 19 19:03:18 UTC+0800 2020

Caterpillar cat 301.8 mini hydraulic excavator (prefix 3 yw) service repair manual (3yw00001 and up)

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Caterpillar cat 301.8 mini hydraulic excavator (prefix 3 yw) service repair manual (3yw00001 and up)