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 397 of 481
TM 9-2320-272-10
3-48
3-11. WHEELS AND TIRES (Contd)
(7) Rear Tire Removal (M939A2 series vehicles).
(a)
Remove CTIS tools from tool compartment.
(b)
Remove spare tire from vehicle.
WARNING
• Air in system is under pressure. Make sure engine is shut down
and air reservoirs are drained before disconnecting CTIS compo-
nents to prevent serious injury to personnel.
• Air is under pressure and creates danger to eyes. Shield eyes to
prevent serious personal injury.
• Ensure brake is set and vehicle is properly chocked. Failure to do
so may result in serious injury to personnel.
(c)
Remove valve core cap (12) and valve core (13) from tank valve (14) to
exhaust all air from tire (16). Replace valve core (13) and valve core cap (12).
(d)
Remove hose assembly (11) from turret valve (15).
(e)
Remove valve cap (18) and valve core (19) from turret valve (20) of
spare tire (21) to exhaust air. Install valve core (19) and valve cap (18) from spare
tire (21) in turret valve (15) of damaged tire (16).
(f)
Remove two locknuts (8) and washers (7) holding shield (6) on wheel
valve (5).
(g)
Remove two screws (10), washers (9), and shield (6) from hub cap (17)
and wheel valve (5). Replace two screws (10) and washers (9) in hub cap (17) and
hand-tighten.
(h)
Loosen adapter nut (4) until wheel valve (5) can be removed.
(i)
Remove wheel valve (5) and hose assembly (11) as a complete assem-
bly from adapter nut (4).
(j)
Before removing adapter, clean surface of hub body of dirt and foreign
material which could clog CTIS air passages. Failure to do so will result in improper
inflation or damage to wheel valve.
CAUTION
• Temporarily seal hole in hub body by rapping electrical tape around
hub body at least twice, ensuring that tape completely covers hole.
Failure to do so may result in introduction of dirt or foreign material
into critical CTIS components.
• Temporarily reattach adapter, O-ring, and washer to wheel valve and
rap with electrical tape to seal end and hold O-ring and washer in
place.
(k)
Clean area around adapter.
(l)
Reinstall parts and tape together.
(m)
Remove adapter nut (4), O-ring (3), and washer (2) from hub
body (1). Seal hole in hub body (1) with electrical tape.
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