2012/06/15 Caterpillar

Backhoe Loader:

416E (S/N: SHA1-UP; CBD1-UP)

420E (S/N: HLS1-UP)

Electric Power Generation:

C4.4 GEN SET (S/N: NCD1-UP; D4B1-UP; D4D1-UP; GLD1-UP; N4D1-UP; N4E1-UP; N4R1-UP; N4X1-UP)

C3.3 GEN SET (S/N: N3C1-UP; N3X1-UP)

C6.6 GEN SET (S/N: SDA1-UP; N6D1-UP; MRW1-UP)

Engine:

C4.4 (S/N: 4441-UP)

C6.6 (S/N: 6661-UP)

Generator Set:

3456 GEN SET (S/N: CBX1-UP)

Industrial Engine:

3054C (S/N: 3341-UP)

C4.4 (MECH) (S/N: 4461-UP)

Transmission:

TURNER (S/N: LKT1-UP)

Skid Steer Loader:

242B (S/N: BXM1-UP)

Wheel Loader:

924GZ (S/N: RTA1-UP)

980GSeries II 100GA (S/N: TBL1-UP)

Work Tool:

PR190 (S/N: GLB173-UP)

ReferenceRefer to Special Instruction, REHS0354, "Charging System Troubleshooting".

Alternators used on the above Cat products fails due to electrical overstress. The common causes of electrical overstress are listed below:

• Reverse jump-start or battery connection.

• High Voltage jump-start (overvoltage).

• Load Dump from loose battery or junction block.

• Loss of Ground connection.

• Battery + to Ground short (wiring chafe, accidental short, component short circuit).

To protect the alternators against these common causes:

1. Follow OMM procedure for jump starting an engine if the battery is flat.

2. Make sure that all connections are tight and wired to the correct terminals.

3. Check all associated wiring for damage or potential shorting to ground.