SEAL 0773637 - Caterpillar

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Table 1
Revision Summary of Changes in REHS1765
28 Added new serial number prefixes
27 Added new serial number prefixes
26 Added new serial number prefixes.
Added new tooling.
25 Added new serial number prefixes.
24 Added new serial number prefixes. © 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 enables dealers and dealer customers to benefit from cost reductions made possible through an established parts reusability and salvage program Every effort has been made to provide the most current information known to Caterpillar Since the company makes ongoing product changes and product improvements, this guideline must be used with the latest technical information. Using the latest technical information available from Caterpillar ensures that such changes and improvements are incorporated where applicable.For questions or additional information concerning this guideline, submit a feedback form in the Service Information System web site. To address an urgent need, use the following to forward your request to Caterpillar Repair Process Engineering:
Cat Dealer Technical Communicator
Global Dealer Solution Network
Cat Technical Representative
Knowledge NetworkCanceled Part Numbers and Replaced Part Numbers
This document may not 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
Illustration 1 g01042701
Cylinder Tester
This guideline will enable dealers to test double acting cylinders and extension cylinders. The 188-3926 Caterpillar Cylinder Tester or 9U-6803 Caterpillar Cylinder Tester is used to perform the tests. The function of the cylinder tester is to conduct a leakage test of piston and rod seals in resealed hydraulic cylinders.The test of whether piston and rod seals are resealed is determined in two (2) ways:
By watching the rod, piston drift, and external leaks at the rod. The seals will leak and cause the rod to drift if the wrong piston seals have been installed. Also, check to see if the seals have been "cut" during assembly. Damaged seals will also cause drifting or leaking.
By watching the rod, cap (and head) end, and gauge readings. If the pressures hold, piston and rod seals are resealed, the test was effective. If the pressures drop and equalize, a leakage path exists either through the seal or past a scratch in