HOOK AS 5208239 - Caterpillar

© 2018 Caterpillar All Rights Reserved. This guideline is for the use of Cat dealers only. Unauthorized use of this document or the proprietary processes therein without permission may be violation of intellectual property law.Information contained in this document is considered Caterpillar: Confidential Yellow.This Reuse and Salvage Guideline contains the necessary information to allow a dealer to establish a parts reusability program. Reuse and salvage information enables Caterpillar dealers and customers to benefit from cost reductions. Every effort has been made to provide the most current information that is known to Caterpillar. Continuing improvement and advancement of product design might have caused changes to your product which are not included in this publication. This Reuse and Salvage Guideline must be used with the latest technical information that is available from Caterpillar.For technical questions when using this document, work with your Dealer Technical Communicator (TC).To report suspected errors, inaccuracies, or suggestions regarding the document, submit a form for feedback in the Service Information System (SIS Web) interface.Canceled Part Numbers and Replaced Part Numbers
This document may include canceled part numbers and replaced part numbers. Use NPR on SIS for information about canceled part numbers and replaced part numbers. NPR will provide the current part numbers for replaced parts.Summary
During normal operation, wear occurs in the slots of transmission and brake piston tangs. Just as the slots become worn on clutch plates, the slots of the piston tangs also become indented on one or both sides. Refer to Illustration 1. This wear causes unnecessary circumferential movement that could cause an interference with the housing resulting in incorrect shifting or braking.Refer to Table 3 for wear limits in the pin slots.Tooling
Table 2
Required Tooling
Part Number Description
222-3074 Die Grinder
233-8145 Mechanics Vise
4C-3750 Jaw Caps
- Weld Electrode 1.98 mm (0.078 inch) Diameter
- 1/4 inch Shank Carbide Burring Bit Pin Slot Wear
Table 3
Reaction Pin Diameter Slot Width (A)
Maximum Radial Indent Width (B)
Maximum
12.70 mm (0.500 inch) 16.3 mm (0.64 inch) 9.7 mm (0.38 inch)
15.88 mm (0.625 inch) 19.3 mm (0.76 inch) 9.7 mm (0.38 inch)
Illustration 1 g02159074
Nomenclature for pin slot wear limits
Illustration 2 g02159962Preparation
Thoroughly clean and de-grease the piston. Secure the piston in the vise. Check to make sure that the 4C-3750 Jaw Caps are in place to prevent damaging the face of the piston. Use the die grinder and bit to buff the worn surface of the pin slot, prior to welding.Salvage Procedure
Position the piston with the worn side of the slot downward. Use weld electrode to build up the worn area. Do not put an excessive amount of weld in the slot, higher than the unworn area. Refer to Illustrations 3 and 4.
Illustration 3 g02159964
Worn Area
Illustration 4 g02159973
Welded Area
Use the die grinder and bit to grind the weld flush with the unworn surface of the tang. Grind both sides of the tang and slot area. The ground surface in the pin slot should be parallel with the other side of the slot. The shot width should approximately be 0.25 mm (0.010 inch) to 0.38 mm (0.015