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f:tec\manuals\Service\SERVICEv5.indd - V6-0615
SERVICE MANUAL
TIREBOSS
TM
Tire Pressure Control
Air Flow Check Procedures
Regular checks of tire air fl ow will ensure good passage of air into and out of the tires keeping in-
fl ate and defl ate times to a minimum. Air fl ow checks should be done regularly on a monthly basis.
1. With the TIREBOSS
TM
Tire Pressure Control System at the highest setting and tires infl ated
to maximum and stabilized, turn off truck.
2. Close all wheel end valves at the tires for drives,steers and trailers (if applicable).
3. Bleed air from the main air line at the fi ller port on the side of the TIREBOSS
TM
Tire
Pressure Control System Valve Box. This will de-pressurize the main air lines and allow
you to open and remove the metal screen from the Y-Filter safely. (Also located on the side
of the Valve Box in the fi tting that holds the fi ller port).
NOTE: Each tire group has its own Y-fi lter at the side of the valve box. Ensure you bleed
the correct fi ller port for that group. (Typically the bottom Y-fi lter and fi ller port is for the
drive group of tires.)
Schrader Valve
4. Use this opportunity to thoroughly clean the Y-fi lter
screen.
5. One by one, open and close each tire wheel end valve
and note the rate of the air escaping from the Y-fi lter
body. Air fl ows should be strong and consistent. If any
tire air fl ows seem restricted, there is a obstruction in the
wheel hoses or valve stem. Clear these obstructions as
required.
6. Reinstall the Y-fi lter screen and replace seal washer.
7. Repeat procedure for all wheel groups. (i.e. steers and
trailers)
SIDE OF VALVE BOX
Y-fi lter Body
Metal Screen
Seal
Washer
Y-fi lter Cap
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