Rating:
Information stopper Denso
Include in ##:
Cross reference number
Part num
Firm num
Firm
Name
09109-82352
ME728721
STOPPER
Information:
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.
This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS8544" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use "T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.
This Revised Service Letter replaces the January 4, 1996 Service Letter. Changes have been made to the Problem, Affected Product, Parts Needed, Action Required.
Termination Date
January 31, 1997Problem
Group 1
Certain 3126 HEUI Truck Engines may have some 1249714 Jumper Tube Assemblies that crack at the junction of the tube body and the flare at the injector end.This crack could propagate to a point where a hydraulic oil leak will shut down the engine.The warning signals are multiple 164-11 Events, hard hot starting, low power, and/or an inability to have the actual hydraulic oil pressure equal the desired hydraulic oil pressure when running the Injection Actuation Pressure Test on a warm engine.Hold-down clamps are also being replaced to allow access to the flange screws and eliminate the need for service tool 1252583.
The engines with serial numbers 1WM2133-2485 were built with the improved jumper tubes, but these tubes may have been installed with insufficient torque on the clamp bolt. The result could be a failure of the jumper tube. These engines do not need new 1136145 Seats or 1265424 Clamps. Both of these components can be reused. Otherwise the engines should be treated like serial numbers 1WM210-2132.
Group 2
Certain 3126 HEUI Truck Engines may have injectors with machining defects which could result in injector failures. These injectors need to be replaced.
Affected Product
Model & Identification Number
Group 1
3126 (1WM210-2485)
Group 2
3126 (1WM250-250, 1WM1621-1621, 1WM1623-1623, 1WM1640-1652, 1WM1654-1670, 1WM1675-1675, 1WM1683-1683 , 1WM1707-1707, 1WM1709-1709, 1WM1685-1685, 1WM1689-1689, 1WM1710-1710, 1WM1724-1724, 1WM1732-1732 , 1WM1739-1739, 1WM1752-1752, 1WM1753-1753, 1WM1755-1755, 1WM1756-1756, 1WM1773-1773, 1WM1775-1775, 1WM1805-1807 , 1WM1821-1895, 1WM1906-1939, 1WM1946-2000, 1WM2001-2028 , 1WM2030-2046, 1WM2052-2052, 1WM2053-2053, 1WM2055-2055, 1WM2059-2059, 1WM2078-2078 , 1WM2079-2079, 1WM2097-2097, 1WM2098-2098, 1WM2103-2103, 1WM2115-2115, 1WM2118-2118, 1WM2122-2122, 1WM2131-2174 , 1WM2179-2179, 1WM2181-2181)
Some engine serial numbers fall within Group 1 and Group 2. Those serial numbers will require the rework for both Groups 1 and 2 to be performed.
Parts Needed
Group 1
6 - 1136145 Seat6 - 1136303 Seal-O-Ring1 - 1192940 Gasket6 - 1249714 Tube Assembly6 - 1265424 Clamp-InjectorGroup 2
6 - 0R4970 Injector (for 230 HP and Above)6 - 0R4972 Injector (for 210 HP and Below)6 - 1136303 Seal O-Ring (if not included in group 1)6 - 1148718 Seal O-Ring1 - 1192940 Gasket (if not included in group 1)6 - 1231199 Seal6 - 1258274 Seal O-RingAction Required
See attached rework procedure.
Service Claim Allowances
Group 1
Affected Product
* After failure repairs made prior to January 1,
This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS8544" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use "T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.
This Revised Service Letter replaces the January 4, 1996 Service Letter. Changes have been made to the Problem, Affected Product, Parts Needed, Action Required.
Termination Date
January 31, 1997Problem
Group 1
Certain 3126 HEUI Truck Engines may have some 1249714 Jumper Tube Assemblies that crack at the junction of the tube body and the flare at the injector end.This crack could propagate to a point where a hydraulic oil leak will shut down the engine.The warning signals are multiple 164-11 Events, hard hot starting, low power, and/or an inability to have the actual hydraulic oil pressure equal the desired hydraulic oil pressure when running the Injection Actuation Pressure Test on a warm engine.Hold-down clamps are also being replaced to allow access to the flange screws and eliminate the need for service tool 1252583.
The engines with serial numbers 1WM2133-2485 were built with the improved jumper tubes, but these tubes may have been installed with insufficient torque on the clamp bolt. The result could be a failure of the jumper tube. These engines do not need new 1136145 Seats or 1265424 Clamps. Both of these components can be reused. Otherwise the engines should be treated like serial numbers 1WM210-2132.
Group 2
Certain 3126 HEUI Truck Engines may have injectors with machining defects which could result in injector failures. These injectors need to be replaced.
Affected Product
Model & Identification Number
Group 1
3126 (1WM210-2485)
Group 2
3126 (1WM250-250, 1WM1621-1621, 1WM1623-1623, 1WM1640-1652, 1WM1654-1670, 1WM1675-1675, 1WM1683-1683 , 1WM1707-1707, 1WM1709-1709, 1WM1685-1685, 1WM1689-1689, 1WM1710-1710, 1WM1724-1724, 1WM1732-1732 , 1WM1739-1739, 1WM1752-1752, 1WM1753-1753, 1WM1755-1755, 1WM1756-1756, 1WM1773-1773, 1WM1775-1775, 1WM1805-1807 , 1WM1821-1895, 1WM1906-1939, 1WM1946-2000, 1WM2001-2028 , 1WM2030-2046, 1WM2052-2052, 1WM2053-2053, 1WM2055-2055, 1WM2059-2059, 1WM2078-2078 , 1WM2079-2079, 1WM2097-2097, 1WM2098-2098, 1WM2103-2103, 1WM2115-2115, 1WM2118-2118, 1WM2122-2122, 1WM2131-2174 , 1WM2179-2179, 1WM2181-2181)
Some engine serial numbers fall within Group 1 and Group 2. Those serial numbers will require the rework for both Groups 1 and 2 to be performed.
Parts Needed
Group 1
6 - 1136145 Seat6 - 1136303 Seal-O-Ring1 - 1192940 Gasket6 - 1249714 Tube Assembly6 - 1265424 Clamp-InjectorGroup 2
6 - 0R4970 Injector (for 230 HP and Above)6 - 0R4972 Injector (for 210 HP and Below)6 - 1136303 Seal O-Ring (if not included in group 1)6 - 1148718 Seal O-Ring1 - 1192940 Gasket (if not included in group 1)6 - 1231199 Seal6 - 1258274 Seal O-RingAction Required
See attached rework procedure.
Service Claim Allowances
Group 1
Affected Product
* After failure repairs made prior to January 1,