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 144 of 855

TM 9-2350-277-20-1

ENGINE OVERHEATS (OLD VSFD CONFIGURATION) — Continued

0014 00

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 thermostatic fan speed switch. See TM 9-2350-277-10.

2.

Does fan still fail to rotate?

BYN

1.

Replace thermostatic fan speed

switch (WP 0231 00).

2.

Verify no faults found.

B2Y

1.

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

2.

Remove ventilating fan drive belt (WP 0243 00).

3.

Manually rotate ventilating fan drive shaft pulley (1).

4.

Does fan spin freely?

B2YN

1.

Faulty fan drive gearbox. Beyond

unit maintenance repair.

2.

Notify supervisor.

001400-5

Change 5