Product Support Program For Replacing The Camshaft On Certain D6H And D7H Tractors; 12G, 14G And 140G Motor Graders; D25C, D25D, D30C, D30D, D35C, D250B, D300B, D350C, And D350D Articulated Dump Trucks; Challenger 65 Tractors; 235C Excavators; 528 Sk Caterpillar

Product Support Program For Replacing The Camshaft On Certain D6H And D7H Tractors; 12G, 14G And 140G Motor Graders; D25C, D25D, D30C, D30D, D35C, D250B, D300B, D350C, And D350D Articulated Dump Trucks; Challenger 65 Tractors; 235C Excavators; 528 Sk

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Caterpillar: Confidential Yellow

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.

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 "PS0455" as Part Number, "7755" as Group Number, and "96" as Description Code.

NOTE: This Revised Service Letter replaces the August 30, 1990 Service Letter. Changes have been made to reflect the addition and removal of Affected Product. Mail Code TT-11 was removed.

Termination Date

August 31, 1992

Problem

The camshaft on certain D6H and D7H Tractors; 12G, 14G, and 140G Motor Graders; D25C, D25D, D30C, D30D, D35C, D250B, D300B, D350C, and D350D Articulated Dump Trucks; Challenger 65 Tractors; 235C Excavators; 528 Skidders; 615C, 627E, and 637E Scrapers; 815B and 816B Compactors; 966E Loaders; 973 Loaders; and 3306 Industrial Engines may pit and/or spall. Pitting or spalling can only cause the camshaft to wear faster than normal.

Affected Product
Model & Identification Number

D6H (4RC1-2581; 3ZF1-1375; 3YG1-555)

D7H (5BF1-890; 79Z1-2346; 80Z1-804)

12G (3WC1-1380; 61M1-13706)

14G (03L1-215; 96U1-7912)

140G (72V1-12892; 13W1-790)

D25C (9YC1 -1011)

D25D ( 1HK1-240)

D30C (7ZC1-257)

D30D (3AJ1-180, 3AJ183-183, 3AJ184-184)

D35C (2GD1-124)

D250B (5WD1-474)

D300B (4SD1-490)

D350C (8XC1-404)

D350D (9RF1-259)

CH65 (7YC1-1658)

235C (5AF1-985; 3WG1-555)

528 (96C1-735; 97C1-378)

615C (5TF1-394)

627E (6EB1-693; 6FB1-661; 6GB1-777)

637E (1FB1-489; 1HB1-550; 1JB1-695)

815B (17Z1-1157)

816B (15Z1-998)

966E (99Y5315-7164)

973 (86B1-1174)

3306 (7JB1-4275; 5KD1-2271)

Parts Needed

1 - 4P2942 Camshaft Kit

NOTE: Make sure the camshaft kit being used has been updated to include the new 7E6167 Cylinder Head Gasket. See the June 7, 1990 Service Letter - PI7237.

Action Required

Replace the existing camshaft and related components with the parts in the camshaft kit. When installing the cylinder head, make sure that the bolts are coated with 6V4876 Molykote.

Service Claim Allowances

NOTE: This is a 24-hour job.

Parts Disposition

Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

Caterpillar Information System:

PARTS STOCK ACTION ONLY - 3T9343 SWITCH GROUPS NEED TO BE REMOVED FROM PARTS STOCK - PI7249 - MAILED US AND CANADA, CACO, CO FA, BRAZIL, CFEL, COSA PARTS STOCK ACTION ONLY - 3T9343 SWITCH GROUPS NEED TO BE REMOVED FROM PARTS STOCK - PI7249 - MAILED US AND CANADA, CACO, CO FA, BRAZIL, CFEL, COSA

PRIORITY - PARTS STOCK ACTION NEEDED - NEW OIL LEVEL GAUGE NEEDS TO BE INSTALLED IN CERTAIN 3508, 3512, AND 3516 ENGINES EQU IPPED WITH A SHALLOW FABRICATED PAN - PI3478 - MAILED US AND CANADA, CACO, COFA, BRAZIL, CFEL, COSA, MARINE TEPS - REVISE D 0 PRIORITY - PARTS STOCK ACTION NEEDED - NEW OIL LEVEL GAUGE NEEDS TO BE INSTALLED IN CERTAIN 3508, 3512, AND 3516 ENGINES EQU IPPED WITH A SHALLOW FABRICATED PAN - PI3478 - MAILED US AND CANADA, CACO, COFA, BRAZIL, CFEL, COSA, MARINE TEPS - REVISE D 0

PRIORITY - TRANSMISSION OIL TEMPERATURE GAUGE SENDING UNIT NEEDS TO BE MOVED ON CERTAIN D40D AND D400D ARTICULATED DUMP TRU CKS - PI3460 - MAILED US AND CANADA, CFEL, COSA, LIMITED COFA PRIORITY - TRANSMISSION OIL TEMPERATURE GAUGE SENDING UNIT NEEDS TO BE MOVED ON CERTAIN D40D AND D400D ARTICULATED DUMP TRU CKS - PI3460 - MAILED US AND CANADA, CFEL, COSA, LIMITED COFA

PRIORITY - THE CENTER DRIVE SHAFT BEARINGS NEED TO BE INSPECTED FOR CORRECT ADJUSTMENT ON CERTAIN 518 AND 528 SKI DDERS - PI3479 - MAILED US AND CANADA, CACO, COSA, LIMITED COFA PRIORITY - THE CENTER DRIVE SHAFT BEARINGS NEED TO BE INSPECTED FOR CORRECT ADJUSTMENT ON CERTAIN 518 AND 528 SKI DDERS - PI3479 - MAILED US AND CANADA, CACO, COSA, LIMITED COFA

PSP FOR REPLACING THE IGNITION TUBE SEAL ON CERTAIN 3408B AND 3412B SI ENGINES - PS4522 - MAILED US AND CANADA, CACO, COFA, CFE L, COSA PSP FOR REPLACING THE IGNITION TUBE SEAL ON CERTAIN 3408B AND 3412B SI ENGINES - PS4522 - MAILED US AND CANADA, CACO, COFA, CFE L, COSA

PSP FOR INSTALLING NEW THROTTLE CONTROL CONSOLE PARTS THAT ARE MORE RESISTANT TO CRACKING ON CERTAIN CP643, CS643, CP653, AND CS6 53 COMPACTORS; AND CERTAIN ALBARET BUILT VM1203 AND VM1204 COMPACTORS - PS4518 - MAILED COSA PSP FOR INSTALLING NEW THROTTLE CONTROL CONSOLE PARTS THAT ARE MORE RESISTANT TO CRACKING ON CERTAIN CP643, CS643, CP653, AND CS6 53 COMPACTORS; AND CERTAIN ALBARET BUILT VM1203 AND VM1204 COMPACTORS - PS4518 - MAILED COSA

PSP FOR INSTALLING A CHECK VALVE IN THE FUEL FILTER LINES GROUP ON CERTAIN E110B, E120B, E200B, EL200B, 213B, 314B, 224B, E2 40B, EL240B EXCAVATORS; 446 BACKHOE LOADERS; AND 3114 AND 3116 GENERATOR SET, INDUSTRIAL, AND MARINE ENGINES - PS0472 - MAILE PSP FOR INSTALLING A CHECK VALVE IN THE FUEL FILTER LINES GROUP ON CERTAIN E110B, E120B, E200B, EL200B, 213B, 314B, 224B, E2 40B, EL240B EXCAVATORS; 446 BACKHOE LOADERS; AND 3114 AND 3116 GENERATOR SET, INDUSTRIAL, AND MARINE ENGINES - PS0472 - MAILE

PSP FOR REPLACING THE CONTROL GROUP (PERSONALITY MODULE) ON CERTAIN 261 KW (350 HP) 3406B PEEC ENGINES - PS4502 - MAILED US AND CANADA, COFA, TRUCK TEPS PSP FOR REPLACING THE CONTROL GROUP (PERSONALITY MODULE) ON CERTAIN 261 KW (350 HP) 3406B PEEC ENGINES - PS4502 - MAILED US AND CANADA, COFA, TRUCK TEPS

PSP FOR REDUCING BLACK SMOKE ON CERTAIN E200B AND EL200B EXCAVATORS - PS0466 - MAILED US AND CANADA, CACO PSP FOR REDUCING BLACK SMOKE ON CERTAIN E200B AND EL200B EXCAVATORS - PS0466 - MAILED US AND CANADA, CACO

PSP FOR REDUCING BLACK SMOKE ON CERTAIN E200B AND EL200B EXCAVATORS - PS0466 - MAILED US AND CANADA, CACO PSP FOR REDUCING BLACK SMOKE ON CERTAIN E200B AND EL200B EXCAVATORS - PS0466 - MAILED US AND CANADA, CACO

Product Support Program For Replacing The Jacket Water Radiator Top Tank On Certain 789 Trucks With A Separate Circuit Radiator Top Tank Product Support Program For Replacing The Jacket Water Radiator Top Tank On Certain 789 Trucks With A Separate Circuit Radiator Top Tank

PSP FOR INSTALLING A THROTTLE BODY THRUST WASHER ON CERTAIN 3408 AND 3412 SI INDUSTRIAL ENGINES TO INCREASE THE SERVICE LIF E OF THE THROTTLE ASSEMBLY - PS4507 - MAILED US AND CANADA, COFA, CFEL, COSA PSP FOR INSTALLING A THROTTLE BODY THRUST WASHER ON CERTAIN 3408 AND 3412 SI INDUSTRIAL ENGINES TO INCREASE THE SERVICE LIF E OF THE THROTTLE ASSEMBLY - PS4507 - MAILED US AND CANADA, COFA, CFEL, COSA

PSP FOR REPAIRING THE IMPLEMENT VALVE MOUNTING BRACKET ON CERTAIN 14G AND 16G MOTOR GRADERS - PS4528 - MAILED US AND CAN ADA, CACO, COFA, CFEL, COSA PSP FOR REPAIRING THE IMPLEMENT VALVE MOUNTING BRACKET ON CERTAIN 14G AND 16G MOTOR GRADERS - PS4528 - MAILED US AND CAN ADA, CACO, COFA, CFEL, COSA

PSP FOR REPAIRING THE 9N3723 FAN DRIVE GROUP ON CERTAIN 3406B TRUCK ENGINES - PS4501 - MAILED US AND CANADA, COSA, TRUCK TEP S PSP FOR REPAIRING THE 9N3723 FAN DRIVE GROUP ON CERTAIN 3406B TRUCK ENGINES - PS4501 - MAILED US AND CANADA, COSA, TRUCK TEP S

PARTS STOCK ACTION ONLY - 7C1813 CRANKSHAFT SEAL GROUPS AND 7X7973 FRONT STRUCTURE GASKET KITS IN PARTS STOCK NEED TO BE INS PECTED - PI7250 - MAILED US AND CANADA, TRUCK TEPS PARTS STOCK ACTION ONLY - 7C1813 CRANKSHAFT SEAL GROUPS AND 7X7973 FRONT STRUCTURE GASKET KITS IN PARTS STOCK NEED TO BE INS PECTED - PI7250 - MAILED US AND CANADA, TRUCK TEPS

PSP FOR REPLACING THE 7W1454 OR 7W1455 ACTUATOR ASSEMBLIES AND 9Y4603 THROTTLE ASSEMBLY ON CERTAIN 3408 SI AND 3412 SI GEN ERATOR SET ENGINES - PS4526 - MAILED US AND CANADA, CFEL, COSA, LIMITED COFA - REVISED 11/90 PSP FOR REPLACING THE 7W1454 OR 7W1455 ACTUATOR ASSEMBLIES AND 9Y4603 THROTTLE ASSEMBLY ON CERTAIN 3408 SI AND 3412 SI GEN ERATOR SET ENGINES - PS4526 - MAILED US AND CANADA, CFEL, COSA, LIMITED COFA - REVISED 11/90

Product Support Program For Replacing Failed Fuel Injection Nozzles On Certain 3208 Engines Product Support Program For Replacing Failed Fuel Injection Nozzles On Certain 3208 Engines

PARTS STOCK ACTION ONLY - CERTAIN 9N1547 BEARINGS NEED TO BE REMOVED FROM PARTS STOCK - PI7253 - MAILED US AND CANADA, CACO, CO FA, BRAZIL, CFEL, COSA PARTS STOCK ACTION ONLY - CERTAIN 9N1547 BEARINGS NEED TO BE REMOVED FROM PARTS STOCK - PI7253 - MAILED US AND CANADA, CACO, CO FA, BRAZIL, CFEL, COSA

Product Support Program For Governor Servo Pin Loss On Certain 3304, 3306, 3306B, 3406 And 3406B Engines Product Support Program For Governor Servo Pin Loss On Certain 3304, 3306, 3306B, 3406 And 3406B Engines

PSP FOR INSTALLING STRONGER EXHAUST VALVE PUSH RODS ON CERTAIN 3116 TRUCK ENGINES - PS4530 - MAILED US AND CANADA, LIMITED TRU CK TEPS PSP FOR INSTALLING STRONGER EXHAUST VALVE PUSH RODS ON CERTAIN 3116 TRUCK ENGINES - PS4530 - MAILED US AND CANADA, LIMITED TRU CK TEPS

PARTS STOCK ACTION ONLY - CERTAIN WATER PUMPS AND WATER PUMP GASKET KITS FOR 3176 ENGINES NEED TO BE REMOVED FROM PARTS STO CK - PI7254 - MAILED US AND CANADA, TRUCK TEPS PARTS STOCK ACTION ONLY - CERTAIN WATER PUMPS AND WATER PUMP GASKET KITS FOR 3176 ENGINES NEED TO BE REMOVED FROM PARTS STO CK - PI7254 - MAILED US AND CANADA, TRUCK TEPS

SERVICE LETTER SUPPLEMENT FOR AUGUST 17, 1990 SL - PI3460 - PRIORITY - TRANSMISSION OIL TEMPERATURE GAUGE SENDING UNIT NEE DS TO BE MOVED ON CERTAIN D40D AND D400D ARTICULATED DUMP TRUCKS - MAILED US AND CANADA, CFEL, COSA, LIMITED COFA SERVICE LETTER SUPPLEMENT FOR AUGUST 17, 1990 SL - PI3460 - PRIORITY - TRANSMISSION OIL TEMPERATURE GAUGE SENDING UNIT NEE DS TO BE MOVED ON CERTAIN D40D AND D400D ARTICULATED DUMP TRUCKS - MAILED US AND CANADA, CFEL, COSA, LIMITED COFA

Service Letter Supplement Service Letter Supplement

SERVICE LETTER SUPPLEMENT FOR JUNE 12, 1990 SL - PS0446 - PSP FOR REPLACING WORN INTAKE VALVE AND/OR VALVE SEATS ON CERTAIN 350 8, 3512, AND 3516 MARINE AND GENERATOR SET ENGINES - MAILED US AND CANADA, CACO, COFA, BRAZIL, CFEL, COSA, MARINE TEPS SERVICE LETTER SUPPLEMENT FOR JUNE 12, 1990 SL - PS0446 - PSP FOR REPLACING WORN INTAKE VALVE AND/OR VALVE SEATS ON CERTAIN 350 8, 3512, AND 3516 MARINE AND GENERATOR SET ENGINES - MAILED US AND CANADA, CACO, COFA, BRAZIL, CFEL, COSA, MARINE TEPS