156884-9500 ZEXEL 9 423 611 627 BOSCH COMPRESSION SPRING 9423611627 1568849500 1157499760

Table 1
Revision Summary of Changes
01 Updated Illustration 1
02 Updated effectivity Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.Problem
Inadequate battery negative bonding to engine block causing incorrect diagnostic codes/tripping in the units that are disconnected from the engine-mounted charging alternator.Solution
Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.
Illustration 1 g06575359
Generator set isolated DC supply system
(1) Electronic subsystem 1
(2) Electronic subsystem 2
(3) Electronic subsystem 3
(4) Generator set subsystem loads
(5) Engine ECM
(6) Starter
(7) Electronics power buss
(8) Electronics single point ground
(9) 12AWG (4 Sq.mm) bonding jumper (multi strand) wire
(10) Battery disconnect switch
(11) Customer ground connection
(12) Battery
(13) Battery charger
(14) Customer scopeNote: The red color connections in Illustration 1 are to be connected at customer site. Connections should be made after the battery disconnect switch (10).Caterpillar is aware of the problem, and is recommending the following interim solution.Install a 12AWG (4 Sq.mm) bonding jumper (multi strand) wire (9) connecting all electrical sensor grounding points (8) at the power distribution box to the customer ground connection (11). Refer to Illustration 1.Reference: Refer to Special Instruction, REHS4634, "Grounding Design Guide for Electric Power Generation Products".