TM-9-2320-283-20-2

TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 2 OF 3

DECEMBER 1983

TM-9-2320-283-20-2 - Page 224 of 852

TM 9-2320-283-20-2

ELECTRICAL SYSTEM.

3-100.

HOT ENGINE TEMPERATURE SWITCH REPLACEMENT (Continued).

LOCATION/ITEM

ACTION

REMARKS

D.

OPERATIONAL CHECK.

11. Engine.

Start.

Monitor water temp-

Refer to TM 9-2320-283-

perature gage.

Switch should

10.

Shutdown engine

close and activate indicator

after operational check.

lamp when coolant reaches

225°F on gage.

WARNING

Let radiator cool before removing cap.

Remove radiator cap in two steps.

First, place a thick cloth over the

cap and slowly rotate cap counter-

clockwise

to its first stop; pause,

and let pressure escape from the cool-

ing system.

Then rotate cap further

counterclockwise until it can be

removed.

Failure to follow this pro-

cedure can result in burns and serious

personal injury.

NOTE

Follow-on maintenance action required:

Fill radiator (para 3-52).

Check for coolant leaks around hot

engine temperature switch and

shutterstat valve.

Tighten if

necessary.

3-596