Usage:
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 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 "PS4338" 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.
Termination Date
June 30, 1999Problem
The 7E7202 Button used in the 7E7205 Rocker Arm Assembly may become separated from the rocker arm when a unit injector sticks during engine operation. Damage to the unit injector may result when the engine is operated with the button separated from the rocker arm.
Affected Product
Model & Identification Number
3606 (8RB298, 8RB585, 8RB590, 8RB591)
3608 (6MC246, 6MC255, 6MC310, 6MC311, 6MC313, 6MC332, 6MC333, 6MC380, 6MC410, 6MC411, 6MC415 , 6MC481, 6MC482, 6MC488-490)
3612 (9RC121, 9RC130, 9RC131, 9RC143, 9RC187, 9RC188)
3616 (1PD24, 1PD82-85, 1PD103, 1PD104, 1PD108-110, 1PD112-115, 1PD117, 1PD119-143 , 1PD148, 1PD154, 1PD156-161, 1PD163, 1PD165, 1PD167, 1PD168, 1PD206 , 1PD211-215, 1PD217, 1PD238, 1PD241-244, 1PD251-261, 1PD264, 1PD267-275 )
Parts Needed
Action Required
See the attached rework procedure.
Service Claim Allowances
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.
- (1-Rework Procedure)
Rework Procedure
The following procedure provides instructions to install the 1514881 Button onto the 1514918 Rocker Insert used in the 7E7205 Rocker Arm Assembly for the 3600 Series Engine. The button requires a 5P6031 Lock Wire to secure it to the insert.
Recommended Tooling
- - Standard or inch tip screwdriver
- - 10 or 12 inch multiple position pliers (Channel Locks)
- - 12 oz Ball Peen Hammer
- - (2.4 mm) Punch
- - 10 or 12 inch multiple position pliers (Channel Locks)
Installation Of 1514881 Button
1. Remove the 1267473 Rocker Arm Group from the engine and place on a work bench. Use a standard or inch tip screw driver to remove the previous 7E7202 Button and 5P8119 O-Ring by prying between the button and rocker arm.
2. Be sure no damage has occurred to the oil passage in the insert. If damage has occurred it is necessary to replace the insert. A 1514883 Rocker Arm Assembly should be used which includes the 1514881 Button and 1514882 Locking Wire assembled to the insert.
3. If there is no damage to the insert hold the 1514881 Button on the insert using a pair of 10 or 12 inch multiple position pliers. The button has a 2.6 mm (0.10 inch) hole in the side. Make sure the hole in the side of the button is in a position so the wire can be inserted. Insert the wire into the hole.
4. With one person holding the button squarely on the insert with pliers, another person is to hold the wire firmly. Apply pressure on the wire and use a ball peen hammer to drive the wire into the hole. The wire will move around the insert until it is completely installed.
5. Use a 2.4 mm ( inch) punch to drive the wire into the hole until the end of the wire is completely inside the groove in the insert.
6. Be sure the button is free to move on the insert and look to see if the ends of the wire are in the groove. If the button does not move freely remove the insert from the rocker arm and replace with a 1514883 Insert Assembly.
7. End by installing the rocker arm group on the engine. Tighten the two hold down bolts to the correct torque and go through the steps to set valve lash and unit injector timing.