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 389 of 481
TM 9-2320-272-10
3-40
3-11. WHEELS AND TIRES (Contd)
c. Tire Replacement.
WARNING
Engage parking brake and chock wheels on both sides to keep
vehicle from rolling. Failure to do so may result in injury to per-
sonnel.
(1) Tire Removal (M939 series vehicles).
(a)
Remove hydraulic jack (10), jack handle (12), wheel stud nut wrench
(1), and wrench handle (14) from tool compartment. Remove spare tire from storage
location.
NOTE
Wheel stud nuts on left side have left-hand threads. Those on right
side have right-hand threads. Studs and nuts are marked L and R
accordingly.
(b)
Install wrench handle (14) through wheel stud nut wrench (1) and
position wrench (1) on wheel stud nuts (2). Loosen ten wheel stud nuts (2) but do
not remove.
(c)
Turn jack screw (9) of jack (10) out approximately 3 in. (7.6 cm) by
hand.
(d)
Turn valve (11) at base of jack (10) by turning clockwise with slotted
end of jack handle (12) until closed securely.
WARNING
Do not work under vehicle supported by jack only. Jack may slip
causing vehicle to fall, which will result in injury or death.
NOTE
• Place a block under jack if used on soft terrain.
• Use jack stands if available.
• Expansible van bodies must be retracted on M934 models before
jacking vehicle up.
(e)
Position jack (10) under axle housing (8) near tire to be removed.
Insert jack handle (12) into jack (10). Move jack handle (12) up and down until tire
is off the ground.
NOTE
Use special second wheel stud wrench NSN 5120-00-378-4411 to
hold inner adapter spacer nuts in place when braking outer lug nut.
(f)
If rear dual tire is to be replaced, remove ten wheel stud nuts (2) from
adapter spacer nuts (4) and outer tire (3) from axle hub (13). If rear inner wheel (6)
is to be removed, reverse wheel stud nut wrench (1), remove handle (14), and install
near large end of wrench (1). Remove ten adapter spacer nuts (4) and inner tire (6).
(g)
If front tire is to be replaced, remove ten wheel stud nuts (2) from
studs (7) and tire (6) from hub (13).
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