301.6C and 301.8C Mini Hydraulic Excavators Machine Systems Caterpillar


Bucket Cylinder - Remove and Install

Usage:

301.6C JBB

Removal Procedure

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     1P-1859     Retaining Ring Pliers     1    

Start By:

  1. Remove the bucket linkage. Refer to Disassembly and Assembly, "Bucket Linkage - Remove and Install".
  2. Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".

------ WARNING! ------

Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed.

Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death.

Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder.

----------------------

Note: Put identification marks on all hoses, on all hose assemblies, on all wires, and on all tube assemblies for installation purposes. Plug all hose assemblies and all tube assemblies. This helps to prevent fluid loss, and this helps to keep contaminants from entering the system.

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.





    Illustration 1g01186028

  1. Attach a suitable lifting device to bucket cylinder (5). The weight of bucket cylinder (5) is approximately 29 kg (65 lb).

  1. Disconnect hose assemblies (3) .

  1. Use Tooling (A) to remove retaining rings (1). Remove washers (2) and pin (4) .

  1. Remove bucket cylinder (5) .

Disassembly and Assembly Information

Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
B     127-4904     Repair Stand     1    
C     1P-0808     Multipurpose Grease     1    
D     5P-3520     Spanner Wrench     1    
E     195-4609     Seal Pick     1    
F     5P-4197     Spacer     1    
FT-3038 Puller Plate     1    
9U-6833 Nut     1    
6V-7047 Single Acting Cylinder     1    
2U-7544 Warning Plate     1    
5P-4776 Tool Stud     1    
1U-7544 Hydraulic Hand Pump Gp     1    

------ WARNING! ------

Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed.

Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death.

Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder.

----------------------



Illustration 2g01182838

(1) Lubricate the seals.

(2) Apply Tooling (C) to the threads. Use Tooling (D) to tighten the head to a torque of 450 ± 50 N·m (332 ± 37 lb ft).

(3) Apply Tooling (C) to the threads. Tighten the nut to a torque of 235 ± 24 N·m (173 ± 18 lb ft).

Installation Procedure

Table 3
Required Tools    
Tool     Part Number     Part Description     Qty    
A     1P-1859     Retaining Ring Pliers     1    

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.


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.





    Illustration 3g01186028

  1. Position bucket cylinder (5) .

  1. Install pin (4) and washers (2). Use Tooling (A) to install retaining rings (1) .

  1. Connect hose assemblies (3) .

End By: Install the bucket linkage. Refer to Disassembly and Assembly, "Bucket Linkage - Remove and Install".

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