PSP FOR REPLACING FAILED EXHAUST VALVES ON CERTAIN - SEE PAPER COPY FOR APPLICABLE MODELS - PS0452 - MAILED US AND CANADA, CAC O, COFA - REVISED 12/90
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PSP FOR REPLACING FAILED EXHAUST VALVES ON CERTAIN - SEE PAPER COPY FOR APPLICABLE MODELS - PS0452 - MAILED US AND CANADA, CAC O, COFA - REVISED 12/90
NOTE: The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
(Revised December 1990) U-75 A-87 AU-86 PRODUCT SUPPORT PROGRAM FOR REPLACING FAILED EXHAUST VALVES ON CERTAIN D10 TRACTORS; 631, 631B, 633, 637, 641, 641B, 650, 650B, 651, 651B, 657, 657B, 660, 660B, 666, AND 666B TRACTORS; 657, 657B, 666, AND 666B SCRAPERS; 768B, 772, AND 776 TRACTORS; 769, 769B, 773, AND 777 TRUCKS; 824B TRACTORS; 825B AND 826B COMPACTS; 830M AND 834 TRACTORS; AND 983, 988, 992, AND 992B LOADERS 1105 PS0452 NOTE: This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS0452" as Part Number, "7755" as Group Number, and "96" as Description Code. NOTE: Although this Program is to be administered as described above on the Affected Product, parts should be removed from parts stock as soon as possible. NOTE: This Revised Service Letter replaces the April 17, 1990 (Revised June 1990) Service Letter. Changes have been made to clarify the failure mode, include additional Affected Product, and to remove the COSA mail code.
Termination Date
April 30, 1992
Problem
Cyclical loading may cause 8N3725 Exhaust Valves not identified with the letter "E" to fail about 4 to 4.5 inches from the top end of the stem in certain D10 Tractors; 631, 631B, 633, 637, 641, 641B, 650, 650B, 651, 651B, 657, 657B, 660, 660B, 666, and 666B Tractors; 657, 657B, 666, and 666B Scrapers; 768B, 772, and 776 Tractors; 769, 769B, 773, and 777 Trucks; 824B Tractors; 825B and 826B Compacts; 830M and 834 Tractors; and 983, 988, 992, and 992B Loaders. If this type of failure occurs, the head end of the valve will fall into the cylinder. New 7E7830 Exhaust Valves or 8N3725 Exhaust Valves marked with the letter "E" can be installed if cyclical loading has caused this type of failure.
Affected Product
Model Identification Number D10 76X1-Up 84W1-Up 631 & 631B 51F1-Up 13G1-Up 633 44J1-Up 637 65M1-Up 641 & 641B 64F1-Up 65K1-Up 41M1-Up 650 & 650B 63F1-Up 77F1-Up 58K1-Up 651 & 651B 33G1-Up 67K1-Up 44M1-Up 657 & 657B 31G1-Up 53K1-Up 68K1-Up 46M1-Up 47M1-Up 660 & 660B 77F1-Up 90F1-Up 58K1-Up 666 & 666B 77F1-Up 20G1-Up 32G1-Up 64H1-Up 66K1-Up 768B 79S1-Up 769 & 769B 99F1-Up 772 11S1-Up 80S1-Up 773 63G1-Up 776 14H1-Up 777 84A11-Up 824B 36H1-Up 825B 43N1-Up 826B 58U1-Up 830M 41E1-Up 834 43E1-Up 983 38K1-Up 988 87A1-Up 992 & 992B 25K1-Up
Parts Needed
Use as required. Replace all damaged parts resulting from an exhaust valve stem failure.
Action Required
***** Parts Stock ***** Remove all 8N3725 Valves-Exhaust from parts stock that are not marked with the letter "E". Inspect all new and remanufactured cylinder head groups for 8N3725 Valves-Exhaust that are not marked with the letter "E", and replace the valves if found. ***** Affected Product ***** Inspect the engine for signs of overfueling, overspeed, or incorrect timing. Valve failures related to engine abuse or poor maintenance are not eligible for this Program. Replace all parts damaged as a result of an exhaust valve stem failure due to cyclical loading.
Service Claim Allowances
***** Parts Stock ***** Submit one claim for all 8N3725 Valves-Exhaust (not marked with the letter "E") that were removed from parts stock or from cylinder head groups in parts stock. ***** Affected Product ***** D10 Tractors 631, 631B, 633, 637, 641, 641B, 650, 650B, 651, 651B, 657, 657B, 660, 660B, 666, and 666B Tractors 657, 657B, 666, and 666B Scrapers 772 Tractors 824B Tractors 825B and 826B Compactors 830M and 834 Tractors Part Caterpillar Dealer Suggested Customer Suggested smu/age Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs. whichever (D/N) (Cost) (C/L) (Sell) comes first 0-3000 100% 32 0 32 0 0 0-12 mo 3001-6000 33 1/3% 16 0 16 50% 32 13-24 mo NOTE: This is a 64-hour job including removal and installation of the engine. No labor will be allowed at overhaul. NOTE: If there has been a previous repair, retain a copy of the previous repair invoice in the dealer's records for audit purposes, and specify repair date and machine hours in the "Additional Comments" section of the warranty claim. ***** Affected Product ***** 768B, 772, and 776 Tractors 769, 769B, 773, and 777 Trucks 824B Tractors 825B and 826B Compactors 983, 988, 992, and 992B Loaders Part Caterpillar Dealer Suggested Customer Suggested smu/age Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs. whichever (D/N) (Cost) (C/L) (Sell) comes first 0-3000 100% 16 0 16 0 00-12 mo 3001-6000 33 1/3% 8 0 8 50% 16 13-24 mo NOTE: This is a 32-hour job including removing and installing the cylinder heads and repairing one cylinder. No labor will be allowed at overhaul. NOTE: If there has been a previous repair, retain a copy of the previous repair invoice in the dealer's records for audit purposes, and specify repair date and machine hours in the "Additional Comments" section of the warranty claim.
Parts Disposition
Any parts removed (with the exception of cores used for Caterpillar Remanufactured parts) can be rendered useless and scrapped immediately upon completion of the repair.
Caterpillar Information System:
SERVICE LETTER SUPPLEMENT FOR MARCH 29, 1990 SL - PI3462 - PRIORITY - DIFFERENTIAL BEARING CAP BOLTS NEED TO BE TIGHTENED ON CERTAIN 814B WHEEL TRACTORS; 815B, 816B COMPACTORS; 966E LOADERS - MAIL US AND CANADA, CACO, CFEL, COSA, COFA SERVICE LETTER SUPPLEMENT FOR MARCH 29, 1990 SL - PI3462 - PRIORITY - DIFFERENTIAL BEARING CAP BOLTS NEED TO BE TIGHTENED ON CERTAIN 814B WHEEL TRACTORS; 815B, 816B COMPACTORS; 966E LOADERS - MAIL US AND CANADA, CACO, CFEL, COSA, COFA
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PSP FOR TURBOCHARGER TURBINE WHEEL ON D11N TRACTORS; 776B TRACTORS; 777B TRUCKS; AND 3508 ENGINES (SPARE) - PS4394 - MAI LED US AND CANADA, CACO, COFA, CFEL, COSA PSP FOR TURBOCHARGER TURBINE WHEEL ON D11N TRACTORS; 776B TRACTORS; 777B TRUCKS; AND 3508 ENGINES (SPARE) - PS4394 - MAI LED US AND CANADA, CACO, COFA, CFEL, COSA
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PSP FOR REWORKING THE WINCH CONTROLS ON CERTAIN 518 SKIDDERS - PS4421 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA PSP FOR REWORKING THE WINCH CONTROLS ON CERTAIN 518 SKIDDERS - PS4421 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA
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Product Support Program For Replacing The Cylinder Block On Certain D8L Tractors And 631E Wheel Tractors Product Support Program For Replacing The Cylinder Block On Certain D8L Tractors And 631E Wheel Tractors
PSP FOR REPEAT TRACK JOINT FAILURES (LEAKS) ON D8N TRACTORS - PS0430 - MAILED CACO PSP FOR REPEAT TRACK JOINT FAILURES (LEAKS) ON D8N TRACTORS - PS0430 - MAILED CACO
PSP FOR REPAIR OF CRACKS AND REINFORCEMENT OF THE CASE AND FRAME ASSEMBLY ON D5H CUSTOM SKIDDERS - PS4448 - MAILED US, CAN ADA PSP FOR REPAIR OF CRACKS AND REINFORCEMENT OF THE CASE AND FRAME ASSEMBLY ON D5H CUSTOM SKIDDERS - PS4448 - MAILED US, CAN ADA
PARTS STOCK ACTION ONLY - 8D6947 AND 9G5589 SWITCHES NEED TO BE REMOVED FROM PARTS STOCK - PI7234 - MAILED US AND CANADA, CAC O, COFA, BRAZIL, CFEL, COSA PARTS STOCK ACTION ONLY - 8D6947 AND 9G5589 SWITCHES NEED TO BE REMOVED FROM PARTS STOCK - PI7234 - MAILED US AND CANADA, CAC O, COFA, BRAZIL, CFEL, COSA
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Product Support Program For Installing A New Torque Converter Output Shaft On Certain 631E And 637E Wheel Tractors Product Support Program For Installing A New Torque Converter Output Shaft On Certain 631E And 637E Wheel Tractors
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