TM-9-2320-272-10

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; OPERATOR'S MANUAL

SEPTEMBER 2004

CHANGE 2

TM-9-2320-272-10 - Page 379 of 481

TM 9-2320-272-10

3-30

3-9. AIR RESERVOIRS

3-10. TRANSMISSION OIL LEVEL

a. General.

Four drainvalves, located on right side of vehicle next to toolbox,

are used to drain moisture from air reservoirs.

b. Service.

(1)

Turn drainvalves (1) counter-

clockwise to drain moisture from:

(a)

Airbrake system wet tank

reservoir drainvalve 1.

(b)

Spring brake air reservoir

drainvalve 2.

(c)

Primary airbrake system air

reservoir drainvalve 3.

(d)

Secondary airbrake system

air reservoir drainvalve 4.

(2)

After all moisture has been drained and only air is coming out, turn

drainvalves (1) clockwise to close.

c. Final Inspection.

Make sure drainvalves (1) are closed tight to prevent air

from escaping. If air escapes after drainvalves are closed tightly, notify unit

maintenance immediately.

CAUTION

When checking transmission oil level, do not permit dirt, dust or grit

to enter transmission filler tube. Make sure dipstick handle and end

of filler tube are clean to prevent internal transmission damage.

a. General.

The transmission oil level is checked weekly with engine running

at idle, transmission in neutral, and parking brake applied. In M939/A1 series

vehicles, transmission dipstick (3) is located under access door (4) in center of cab

floor. In M939A2 series vehicles, transmission dipstick (3) is on right side of engine

compartment.