User's Manual

43
Date of Origin – 02/01/08
AIR BRAKE SYSTEM - TROUBLESHOOTING GUIDE
CAUTION! Block wheels before servicing trailer air brake
system. Drain resevoirs before removing air lines, hoses, valves, or servicing valve plug units. Consult spring brake manufacturer’s recommendations before working on spring brake chambers.
!
LEGEND
SRV - SERVICE RELAY VALVE (REFERENCE PG 38 BUBBLE 6)
EV - EMERGENCY VALVE (REFERENCE PG 38 BUBBLE 22)
TPV = TRACTOR PROTECTION VALVE