Usage:
CONFIDENTIAL
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TECHNICAL INFORMATION BULLETIN |
March 13, 2001 |
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Engines |
3306B (8NS, LRW) 3406C (9ES, LRX) 3406E (8AZ) 3412 (4BZ) 3412C (9EP, BCW, LRY) 3508 (CAW, CNF) 3508B (BGX, CNB) 3512 (24Z, 6WW, CMJ, FDR) 3512B (BLF, BRK, CMC) 3516 (8TW, CAL, CMD) 3516B (BMB, BPJ, CPA, FDN) |
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Component Code: 1417 |
SUBJECT: Engine Starter Circuit Breaker on Generator Set
PROBLEM:
In order to protect the engine starting system's wiring, a 116-7654 Breaker Assembly is installed in the Electronic Modular Control Panel II (EMCP II) and the Electronic Modular Control Panel II+ (EMCP II+). Occasionally, the engine starter may experience a butt start that will cause the 116-7654 Breaker Assembly to trip. A butt start occurs when the pinion gear's teeth do not properly engage the flywheel. When a butt start occurs, the pinion solenoid current remains in the high pull-in level and the circuit breaker is tripped. Since the 116-7654 Breaker Assembly is not auto resetting, any subsequent attempts to start the engine will fail. The 116-7654 Breaker Assembly will need to be manually reset.
SOLUTION:
The electric starter motor's wiring system has been redesigned to eliminate failure-to-start situations. An auto-resetting type circuit breaker is now installed in a separate box that is mounted on the generator set.
Griffin Built 3412 Product
The 169-0228 Control Box Group (not serviceable) is installed on the 3412 generator set package. The 169-0228 Control Box Group includes the auto-resetting 20 Ampere 9H-1958 Circuit Breaker Group. The 9H-1958 Circuit Breaker Group is shown as CB2 in the following wiring diagrams:
Griffin Built 3500 Family Product
The 147-3348 Wiring Enclosure (not serviceable) is installed on the 3500 generator set packages. The 147-3348 Wiring Enclosure includes the 40 Ampere 8D-7265 Circuit Breaker. The 8D-7265 Circuit Breaker is shown as CB2 in the following wiring diagrams:
- 188-0647
- 194-9618
The 8D-7265 Circuit Breaker is shown as SSM in the following wiring diagrams:
- 188-0646
- 194-9620
Larne Built 3300 and 3400 Family Product
An auto resetting 200-8577 Circuit Breaker is installed in Larne-built 3300 and 3400 family products.
Larne Built 3500 Family Product
The 3500-family generator sets built in Larne include the same 147-3348 Wiring Enclosure (not serviceable) and 40 Ampere 8D-7265 Circuit Breaker that is installed in the Griffin built units.
Currently, the above changes DO NOT apply to the following generator sets:
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