WHEELS AND TIRES (Contd)
Rear Tire Removal (M939A2 series vehicles).
Remove CTIS tools from tool compartment.
Remove spare tire from vehicle.
Air in system is under pressure. Make sure engine is shut down and air reservoirs are drained
before disconnecting CTIS components 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
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).
Remove hose assembly (11) from turret valve (15).
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).
Remove two locknuts (8) and washers (7) holding shield (6) on wheel valve (5).
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.
Loosen adapter nut (4) until wheel valve (5) can be removed.
Remove wheel valve (5) and hose assembly (11) as a complete assembly from adapter nut (4).
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.
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.
Clean area around adapter.
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