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 806 of 852

TM 9-2320-283-20-2

BRAKE SYSTEM.

3-198. AIR DRYER REPLACEMENT (Continued).

LOCATION / ITEM

ACTION

REMARKS

D.

OPERATIONAL CHECK.

WARNING

Ensure that, when engine is running, wheels are

blocked, transmission is set to neutral, and vehicle

is secured. Failure to

secure vehicle could cause

injury or death to persons working in and around

vehicle.

16.

Engine.

a.

Close air system drain-

Refer to TM 9-2320-283-

cocks. Start up and

10.

charge air system until

air pressure reaches 100

psi. Verify that there is

is no air leakage at cover

(18) or at any air line

connections.

b.

Charge the system until

A sharp burst of air

the compressor unloads.

should exhaust from

Verify that system purges.

item (18).

NOTE

For the next step, thermostat assembly should

be

exposed

to

temperatures below 50°F.

17.

Cover (19).

a.

Having run engine for a

Item (19) should be

minimum of five minutes,

warm. If not, item (19)

verify that heating ele-

should be replaced.

ment is working.

(Refer to para 3-199).

b.

Shut down engine.

Refer to TM 9-2320-283-

10.

NOTE

Follow-on maintenance action required:

None.

3-1178