SERVICE MANUAL
TIREBOSS
TM
Tire Pressure Control
4-7
f:tec\manuals\Service\SERVICEv5.indd - V6-0615
Wheel End Valve Operational Check
Wheel End Valves (WEV)
Operational Checks and AIR Flow Checks
1: Run truck with all wheel valves open to highest tire pressure setting
(i.e. 95 or 100 PSI).
2: Shut down truck and turn on ignition switch so controller is in operational mode.
Check tire pressure with tire gauge at each individual pressure test fi tting at WEV.
Should be same as at controller +/- 2 PSI.
3: Remove air supply hose at hanger end carefully, as it is under high pressure.
Tire Air Pressure will be dropping rapidly - Use Eye and Ear Protection
4: Confi rm “Tire Pressure Loss” warning activates on controller
5: Allow air to completely defl ate until it stops.
This may take 1.5 to 2 minutes (larger tires may take longer).
6: Confi rm tire pressure with tire gauge at each individual WEV pressure test fi tting.
All should be around 8-12 PSI (299-2502), 12-18 PSI (299-2501),
18-22 PSI (299-2500), 38-42 PSI (299-2504), 68-72 PSI (299-2503).
This means WEV is closing properly & air fl ow is okay as tire defl ated.
Re-install air supply hose.
7: Run truck and re-infl ate tires to highest pressures. Spray with soapy water to
check all hoses and valves.
8: Defl ate tires to lowest setting using the controller & confi rm pressures stabilize
without excessive cycling or overshooting set point and no alerts/warnings are
coming on. Also confi rm reading at each tire pressure test fi tting is not higher
than monitor pressure when at lowest setting.
This confi rms the WEV did not close prior to the lowest programmed setting.
9: Re-install pressure test fi tting caps.
!
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