D7E Track-Type Tractor Power Train Recoil Cylinder - Disassemble Caterpillar


Recoil Cylinder - Disassemble
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1.1. Disassembly Procedure

Disassembly Procedure

Start By:

  1. Remove the track adjuster and the recoil cylinder.

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     152-4252     Hydraulic Repair Bench     1    
B     175-5507     Nitrogen Charging Group     1    
338-0500 Regulator Assembly     1    
346-3622 Relief Valve     1    
C     8T-0372     Bolt     2    
D     1H-3109     Leg     1    
5F-9887 Adapter     1    
5P-4807 Cap     1    
- 1 1/2" Socket 1" Drive     1    
E     9U-5919     Spanner     1    
209-6756 Clamp As     1    
4J-2620 Wear Ring     2    
9X-3579 Wear Ring     2    
8T-7850 Wear Ring     2    
F     FT-3233     Spanner Wrench As.     1    
5P-3521 Pin     3    
5P-3522 Pin     3    

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

High pressure cylinder. Parts can separate with explosive force if proper care is not used during disassembly.

This can cause injury or death.

Do not disassemble any part of this cylinder until you have read and understand the instructions given in the service manual. Observe the instructions given in the service manual.

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



    Illustration 1g03483240

  1. Secure cylinder (1) to the hydraulic repair bench.

  1. Remove bolts (2) and guard (3) .



    Illustration 2g03483316

  1. Attach Tooling (A) to valve (4) . Slowly vent the nitrogen from the cylinder, until all pressure is released. Refer to Special Instruction, REHS5464, "Accumulator Discharging and Charging Procedures" for further information.



    Illustration 3g03483261



    Illustration 4g03500319

  1. After all the pressure is released from the recoil cylinder, remove valve (4) from manifold (5) .

  1. Remove bolts (7) , bolts (8) , manifold (5) , and spring pin (6) .

    Note: Cylinder groups that do not include spring pin (6) or holes for spring pin (6) Refer to Special Instruction, REHS8537, "Installation Procedure for Installing Spring Pins in the Recoil Cylinder of Certain D7E Track-Type Tractors".




    Illustration 5g03512697

  1. Secure cylinder (1) to the hydraulic repair bench. Use Tooling (B) and the hydraulic repair bench to remove head assembly (9) from cylinder (1) .

    Note: Some oil will drain during this step.




    Illustration 6g03501036

  1. Remove O-ring seal (10) , O-ring seal (12) , and backup ring (11) from head assembly (9) .



    Illustration 7g03501166

  1. Remove plug (13) from cylinder (1) .



    Illustration 8g03501175



    Illustration 9g03501201

  1. Reorient and secure cylinder (1) to the hydraulic repair bench.

  1. Use Tooling (D) and the hydraulic repair bench to push the rod assembly until spacer (14) can be removed.

    Note: To prevent damage to cylinder (1) wrap Tooling (D) with padding (as shown).

  1. Remove spacer (14) from the cylinder.

  1. Remove O-ring seals (15) from spacer (14) .



    Illustration 10g03501156

  1. Remove rod assembly (16) and piston assembly (17) from cylinder (1) .

  1. Inspect Cylinder (1) for any internal damage. Refer to Specifications, "Recoil Cylinder" for more information.



    Illustration 11g03501560

  1. Secure rod assembly (16) , piston assembly (17) , and Tooling (E) to the hydraulic repair bench.

  1. Remove spring pin (18) from between rod assembly (16) and piston assembly (17) .

    Note: Cylinder groups that did not include a spring pin or setscrew (18) or had a spring pin previously installed Refer to Special Instruction, REHS8537, "Installation Procedure for Installing Spring Pins in the Recoil Cylinder of Certain D7E Track-Type Tractors".




    Illustration 12g03501568

  1. Use Tooling (F) and the hydraulic repair bench to remove piston assembly (17) while holding the rod assembly with Tooling (E) .



    Illustration 13g03502309

  1. Remove O-ring seal (19) and backup ring (20) from piston assembly (17) .



    Illustration 14g03502332

  1. Remove wear band (21) , energized wear ring assembly (22) , backup rings (23) , T seal (24) , and wear band (25) from piston (17) .



    Illustration 15g03502403



    Illustration 16g03502502

  1. Use Tooling (F) and the hydraulic repair bench to remove cap assembly (26) from cylinder (1) .

    Note: Remove only if replacing cap assembly (26) . The seals can be replaced without removing cap assembly (26) .

  1. Remove scraper seal (27) , backup rings (29) , and O-ring seal (28) from cap assembly (26) .

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