PUMP GP-PISTON 20R0090 - Caterpillar

Partsstock action only CERTAIN SMR SEALS NEED TOBE REMOVED FROM PARTS STOCK
4052 PI70018
The information supplied in this serviceletter may not be valid after the termination date of this program. Donot perform the work outlined in this Service Letter after the terminationdate without first contacting your Caterpillar product analyst.TERMINATION DATE
March 31, 2001PROBLEM
Certain 1882103 SMR seals that were manufacturedbefore the date code of December 13, 2000 may not have a correct radiusat the metal ring ?neck?, which will eventually cut the rubber ring, resultingin final drive oil leakage.ACTION REQUIRED
Using the instructions provided in this letter,inspect all 1882103 SMR seals for seals manufactured prior to the datecode of December 13, 2000. The date code can be found at the metal ringI.D. Remove the seals from dealer stock.1882103 Seal Gp ? SMR Usability Guidelines
These guidelines are intended to prevent the installationof seals that have a sharp corner on the back of the metal seal ring thatcould cut the rubber load ring.
Guidelines by Date Code:
Any seal with a date code earlier thanAugust 29, 2000 should not be used.
Any seal with a date code of August29th through Dec 12, 2000 needs to be inspected according tothe guidelines below.
Any seal with a date code of Dec 13,2000 or later does not need to be inspected and is a good seal.
Inspection Guidelines:A usable seal will have a roundededge at the O.D. and tooth area on the opposite side of the load surfaceas shown in Figure 1. An alternate geometry that is also a good seal hasthe rounded edge at the O.D. and tooth area and a step that moves the sharpcorner away from the O.D. This geometry is shown in Figure 2. If some amountof this step is left around the entire circumference of the seal then theseal is good and no further inspection is needed. Any portion of the circumferencewhere this step has been entirely removed needs to be inspected for sharpcorners.
Having a sharp edge at the O.D.or tooth area makes a seal unusable. An example is shown in Figure 3. Figures 4 and 5 show examples of radius in thetooth area that are acceptable and unacceptable. Figure 4 shows a tootharea that has the bare minimum amount of radius left. Any sharper of acorner than what is shown here should not be used. Figure 5 shows a toothwhere too much of the radius has been removed and the corner could cutthe load ring.Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 SERVICE CLAIM ALLOWANCES
Submit one claim for all 1882103 SMR Seals removedfrom parts stock.PARTS DISPOSITION
All dealers are to make sure the outsideof the shipping container is marked PI70018.***** U.S. and Canadian Dealers *****Return all 1882103 that are removed from partsstock and a copy of the claim to:Caterpillar Inc.
Attn: Supplier Recovery PI70018
Service Claims Room
8201 N. University
Peoria, IL 61615
***** CofA *****Return all 1882103 that are removed from partsstock and a copy of the claim to:Caterpillar of Australia
Warranty Claims Area
1 Sharps Rd.
Tullamarine Vic 3043***** COSA Dealers *****Contact:Claim Section Supervisor
Grimbergen Parts DepotCaterpillar Overseas S.A.
Warranty Claims Area / PI70018
Humbeeksesteenweg, 98
1850