Caterpillar cat 301.8 c mini hydraulic excavator (prefix jbb) service repair manual (jbb00001 and up)

Service Repair Manual
Models
301.6C and 301.8C
Mini Hydraulic Excavator

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Product: MINI HYD EXCAVATOR
Model: 301.6C MINI HYD EXCAVATOR JBB
Configuration: 301.6C & 301.8C Mini Hydraulic Excavators JBB00001-UP (MACHINE) POWERED BY L3E Engine
Disassembly and Assembly
301.6C and 301.8C
Mini Hydraulic Excavators
Machine Systems
Media Number -RENR9157-01 Publication Date -01/11/2005 Date Updated -06/12/2005
i02365060
Recoil Spring - Remove and Install
SMCS - 4158-010
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 6H-1627 Spacer 1
Start By:
A. Remove the track adjuster. Refer to Disassembly and Assembly, "Hydraulic Track Adjuster
- Remove and Install".
Illustration 1 g01181246
1/6301.6C & 301.8C Mini Hydraulic Excavators JBB00001-UP (MACHINE) POWERE...
2020/3/10https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

1. Remove bolts (1) and idler assembly (2) .

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 cotter pin (2). Use Tooling (A) and a suitable press in order to compress recoil
spring (5). Loosen nut (3) .
3. Slowly release the spring tension. Remove nut (3), plate (4), and recoil spring (5) from
cylinder assembly (6) .
Installation Procedure
Table 2
Required Tools
A 6H-1627 Spacer 1
B 9S-3263 Thread Lock Compound 1

(X) 138.00 ± 1.50 mm (5.430 ± 0.060 inch)

1. Install recoil spring (5), plate (4), and nut (3) onto cylinder assembly (6) .
2. Use Tooling (A) and a suitable press in order to compress recoil spring (5) to Dimension
(X). Tighten nut (3) and install cotter pin (2) .
3. Slowly release the spring tension.
4. Apply Tooling (B) to bolts (1). Position idler assembly (2) and install bolts (1) .

End By: Install the track adjuster. Refer to Disassembly and Assembly, "Hydraulic Track
Adjuster - Remove and Install".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Tue Mar 10 21:31:08 UTC+0800 2020

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301.6C and 301.8C
Machine Systems
i02355300
Front Idler - Remove and Install
SMCS - 4159-010
Removal Procedure
Start By:
A. Remove the front idler, the recoil spring, and the hydraulic track adjuster. Refer to
Disassembly and Assembly, "Front Idler, Recoil Spring and Hydraulic Track Adjuster -
Remove and Install".

1. Remove bolts (4) and spring assembly (2).
2. Remove bolts (1), supports (5), and front idler (3) .
Table 1
Required Tools
A 9S-3263 Thread Lock Compound 1

1. Apply Tooling (A) to bolts (1) and (4) .
2. Position front idler (3) and supports (5). Install bolts (1) .
3. Position spring assembly (2) and install bolts (4) .
End By: Install the front idler, the recoil spring, and the hydraulic track adjuster. Refer to
Disassembly and Assembly, "Front Idler, Recoil Spring and Hydraulic Track Adjuster - Remove
and Install".
Tue Mar 10 21:32:05 UTC+0800 2020

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301.6C and 301.8C
Machine Systems
i02355327
Hydraulic Track Adjusters - Remove and Install
SMCS - 4157-010
Removal Procedure
Start By:
A. Remove the front idler, the recoil spring, and the hydraulic track adjuster. Refer to
Disassembly and Assembly, "Front Idler, Recoil Spring and Hydraulic Track Adjuster -
Remove and Install".
Note: Cleanliness is an important factor. Before you begin the disassembly procedure, the exterior
of the components should be thoroughly cleaned. This will help to prevent dirt from entering the
internal mechanism. Precision components can be damaged by contaminants or by dirt. Perform
disassembly procedures on a clean work surface. Keep components covered and protected at all
times.

1. Remove track adjuster (1) .
2. Remove seal (2). Remove ring (3) and O-ring seal (4) .
3. Remove bolts (8), plates (6) and (7), and grease fitting (5) .
Table 1
Required Tools
Note: Cleanliness is an important factor. Before assembly, thoroughly clean all parts in cleaning
fluid. Allow the parts to air dry. Do not use wiping cloths or rags to dry parts. Lint may be
deposited on the parts which may cause trouble. Inspect all parts. If any parts are worn or
damaged, use new parts for replacement. Dirt and other contaminants can damage the precision
component. Perform assembly procedures on a clean work surface. Keep components covered and
protected at all times.

1. Apply Tooling (A) to bolts (9) .
2. Position plates (6) and (7). Install bolts (8) and grease fitting (5) .
3. Install ring (3) and O-ring seal (4). Install seal (2) .
4. Install track adjuster (1) .
End By: Install the front idler, the recoil spring, and the hydraulic track adjuster. Refer to
Disassembly and Assembly, "Front Idler, Recoil Spring and Hydraulic Track Adjuster - Remove
and Install".
Tue Mar 10 21:33:02 UTC+0800 2020

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301.6C and 301.8C
Machine Systems
i02355301
Sprocket - Remove and Install
SMCS - 4164-010
Removal Procedure
Start By:
A. Remove the track. Refer to Disassembly and Assembly, "Track - Remove and Install".
1. Remove bolts (1) and sprocket (2) .
Table 1
Required Tools

1. Apply Tooling (A) to bolts (1) .
2. Position sprocket (2) and install bolts (1) .
End By: Install the track. Refer to Disassembly and Assembly, "Track - Remove and Install".
Tue Mar 10 21:33:59 UTC+0800 2020

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301.6C and 301.8C
Machine Systems
i02360053
Final Drive and Travel Motor - Remove
SMCS - 4050-011; 4351-011
Removal Procedure
Table 1
Required Tools
A 138-7575 Link Bracket 1
Start By:
A. Remove the track. Refer to Disassembly and Assembly, "Track - Remove and Install".
Note: Cleanliness is an important factor. Before you begin the removal procedure, the exterior of
the components should be thoroughly cleaned. This will help to prevent dirt from entering the
internal mechanism.
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 Dealer Service
Tool Catalog" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.

Dispose of all fluids according to local regulations and mandates.
1. Drain the hydraulic tank into a suitable container for storage or disposal. Refer to Operation
and Maintenance Manual, "Hydraulic System Oil - Change".
2. Remove cover (1) .
3. Disconnect hose assemblies (2) .

4. Attach Tooling (A) and a suitable lifting device to the final drive and travel motor (4). The
weight of the final drive and travel motor (4) is approximately 27 kg (60 lb). Remove bolts
(3) and the final drive and travel motor (4) .
Tue Mar 10 21:34:56 UTC+0800 2020

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301.6C and 301.8C
Machine Systems
i02355294
Final Drive and Travel Motor - Disassemble
SMCS - 4050-015; 4351-015
Disassembly Procedure
Table 1
Required Tools
A 1P-1857 Retaining Ring Pliers 1
B 8B-7554 Bearing Cup Puller Gp 1
C 1P-1855 Retaining Ring Pliers 1
D 1P-1859 Retaining Ring Pliers 1
E 1P-1863 Retaining Ring Pliers 1
F 154-6181 Forcing Screw 2
Start By:
A. Remove the track motor. Refer to Disassembly and Assembly, "Final Drive and Travel
Motor - Remove".

1. Remove plug (1) and the O-ring seal.
2. Remove spring (4) and washer (3) .
3. Remove spool (2) .
4. Repeat Steps 1 through Steps 2 for the opposite side.

5. Remove bolts (5) and head assembly (6) .
6. Remove bearing (7) .

Caterpillar cat 301.8 c mini hydraulic excavator (prefix jbb) service repair manual (jbb00001 and up)

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