TM-9-2320-285-24-1

TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1

TECHNICAL MANUAL; ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

OCTOBER 1985

TM-9-2320-285-24-1 - Page 148 of 987

TM 9-2320-285-24-1

2-15.

COOLING SYSTEM MAINTENANCE

a.

Radiator.

(1)

Servicing.

This task covers servicing of the radiator consisting of checking coolant level, draining

coolant, flushing, and filling the radiator with coolant.

INITIAL SETUP:

Tools

Personnel Required

No.

1 Common Organizational Maintenance

Wheel Vehicle Mechanic MOS 63B

Tool Kit

Socket wrench set

Equipment Condition

Adjustable open end wrench

Paragraph

Condition Description

Safety glasses

Flushing gun

Vehicle parked on level

surface, engine off, parking

Materials/Parts

brake applied, and hood open.

Antifreeze,

ethylene glycol

Item 25, Appendix C

Hose, 1-3/4 inch

inside diameter

15 gallon container

STEP

LOCATION

ITEM

ACTION

REMARKS

COOLANT LEVEL CHECK

1

Radiator

Reservoir tank

Check cool-

If tank is empty, proceed to

ant level

step 2 below

2

Cab

a.

Radiator access

Unlatch and

panel

raise

WARNING

Remove radiator cap slowly to relieve pressure before completely removing when engine is

hot.

Failure to do so could cause severe injury.

If you are scalded by steam, obtain medical

attention immediately.

b.

Radiator cap

Loosen, then

Turn counterclockwise to

remove

first detent.

Allow pres-

sure to escape before re-

moving

2-125