TM-9-2350-277-20-1

CARRIER M113A3, M577A3, M1059A3, M1064A3, M1068A3 AND M58

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL VOLUME 1 OF 6

TM-9-2350-277-20-1 - Page 150 of 855

TM 9-2350-277-20-1

ENGINE OVERHEATS (NEW VSFD CONFIGURATION) — Continued

0014 01

10Y

1. Allowsystemtoremainat13to15psipressureforfiveminutes

.

2.

Does pressure drop less than one psi?

10YN

1.

Internal coolant system leak. Beyond

unit maintenance repair.

2.

Notify supervisor.

11Y

1.

Replace coolant pump (WP 0241 00).

2.

Verify no faults found.

BY

1.

Engage variable speed fan drive override switch. See

TM 9-2350-277-10.

2.

Does fan still fail to rotate?

BYN

1.

Replace VSFD controller

(WP 0250 01).

2.

Verify no faults found.

B2Y

1.

Stop engine. See TM 9-2350-277-10.

2.

Install jumper wire on wiring harness (P/N 12474786)

terminals E3 and E4.

3.

Start engine. See TM 9-2350-277-10.

4.

Does fan rotate?

BY2N

GO TO

CY

(PAGE 0014 01-6)

B3Y

1.

Stop engine. See TM 9-2350-277-10.

2.

Remove ventilating fan drive belt (WP 0111 00).

3.

Manually rotate ventilating fan drive shaft pulley (1).

4.

Does fan spin freely?

B3YN

1.

Faulty fan drive gearbox. Beyond

unit maintenance repair.

2.

Notify supervisor.

001401-5

Change 5