INJECTOR GP- 3282577 - Caterpillar

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 must be administered as soon as possible. When reporting the repair, use "PI3700" as the Part Number, "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code. Exception: If the repair is done after failure, use "PI3700" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
Completion Date
November 30, 1994Termination Date
May 31, 1995Problem
The wrong ROM was installed in the controller on certain 330 and 330L Excavators. The ROM will cause lack of hydraulic power in both power mode 1 and 2. No problems will occur in power mode 3.
Affected Product
Model & Identification Number
330 (8RL44-45, 8RL49-51, 8RL53-71)
300L (9ML81-87)
Parts Needed
Dealers will need to order parts for this Program.
1 - 1060226 Control KitAction Required
Usually installing the 1060226 Control Kit is all that is needed. In those cases the automatic governor actuator and the proportional reducing valve do not need to be recalibrated. If a reworked controller is installed on a machine different than the machine from which it was removed, then recalibration of the automatic governor actuator and the proportional reducing valve is required per the Testing and Adjusting Manual.
See the attached rework procedure.
Service Claim Allowances
This is a 1 hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.
Attach.(1-Rework Procedure)Rework Procedure
Before touching the ROM or controller, the mechanic should touch a metal structure to get rid of any static electricity. Change the controller ROM indoors to prevent dust or moisture from entering the controller.
1. Turn the key switch and disconnect switch off.2. Remove the 40-pin and 24-pin connectors from the controller with 4.0 mm hex wrench. 3. Remove the controller from the machine.4. Remove controller cover mounting bolts and carefully raise the cover. Short wires connect the cover and the controller body. Remove the cover gently to avoid damaging the inner wires. The cover cannot be fully raised. See Illustration 1.
Illustration 15. Remove the O-ring seal for the cover. Do not reuse the seal.6. Push ROM holders in direction F to remove them. See Illustration 2.
Illustration 27. Insert screwdriver under the ROM as shown in Illustration 3 and raise it slightly. Do the same for other end. Repeat this step and remove the ROM carefully so as not to break pins of the ROM.
Illustration 38. Before installing the new ROM, practice ROM insertion using the removed ROM. Before touching the new ROM, touch a metal piece such as the controller cover to remove any static electricity from your hands.
9. Install the new ROM in the controller. The ROM pins should be at a right angle to the ROM body for easy installation.