2002/06/10 Caterpillar


Installing a Stiffener Plate to the Lift Cylinder Tube Assemblies Increases Service Life {5057}

Usage:

R1700G 8XZ
Load Haul Dump:
R1700G (S/N: 8XZ)

Reference: Systems Operation Testing and Adjusting, RENR4668 (9EP5398), "R1700G LHD Hydraulic System", "Hydraulic System Pressure - Release". This module is part of Service Manual RENR4656 (9EP5386)

Description of Change: Installing a stiffener plate to the lift cylinder tube assemblies increases service life of the lift cylinder tube assemblies.

Adaptable To: The stiffener plates are adaptable to R1700G (S/N: 8XZ1-UP) by using the following procedure.


NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. 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 in Caterpillar machines.

Dispose of all fluids according to local regulations and mandates.


Procedure


Illustration 1g00893941

(1) Lift Cylinder Tube Assemblies

  1. Release hydraulic system pressure. Refer to Systems Operation Testing and Adjusting, RENR4668 (9EP5398), "R1700G LHD Hydraulic System", "Hydraulic System Pressure - Release".

  1. Remove all components that are needed to facilitate the removal of lift cylinder tube assemblies (1).

  1. Remove lift cylinder tube assemblies (1) .



    Illustration 2g00896438

    (A) 123 mm (4.84 inch)

    (B) 59 mm (2.32 inch)

    (C) 21 mm (0.83 inch)

    (D) 8 mm (0.32 inch) X 45 ° Chamfer - 2 Places Typical

  1. Manufacture a stiffener plate from 6 mm (0.24 inch) mild steel plate. Refer Illustration 2.



    Illustration 3g00894212

    (1) Lift cylinder tube assembly

    (2) Manufactured stiffener plate

  1. Weld stiffener plate (2) to lift cylinder tube assembly (1). Refer to Illustration 3.

  1. Install lift cylinder tube assemblies (1) that were removed in step 3.

  1. Install the components that were removed in step 2.

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