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 142 of 855

TM 9-2350-277-20-1

ENGINE OVERHEATS (OLD VSFD CONFIGURATION) — Continued

0014 00

7Y

1.

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

2.

Observe ventilating fan speed.

3.

Does speed stay the same?

7YN

1.

Replace thermostatic fan switch

(WP 0231 00).

2.

Verify no faults found.

8Y

1.

Observe rotation of ventilating fan (1) and generator drive

pulleys (2) on drive unit.

2.

Is fan pulley rotating as fast as the generator pulley?

8YN

1.

Disengage thermostatic fan

speed switch.

2.

Replace variable speed fan drive

(WP 0249 00).

3.

Verify no faults found.

001400-3

Change 5