4
FIGURE 5 - PUSH-PULL VALVE LEAKAGE KEY
S-1
VALVE V-1
VALVE V-2
VALVE V-3
S-3
S-2
S-4
S-5
S-6
P-6
FIGURE 6 - TRACTOR SPRING BRAKE DELIVERY
P-2
P-3 (SUPPLY)
P-5
(DELIVERY TO
TRAILER AIR
SUPPLY
P-6 (EXHAUST)
FIGURE 7
AUXILIARY MODULE LEAKAGE CHART
OPERATING MODE (SUPPLY CHARGED TO 100 PSI)
VALVE
POSITION
T-1
T-2
Leakage
Symptoms
Correction
OFF
OFF
S-1
Replace spool assy.
in T-1
S-4
Replace spool assy.
in T-2
Exhaust Hole P-7 Replace spool assy.
in T-1
Exhaust Hole P-8 Replace spool assy.
in T-2
ON
ON
Exhaust Hole P-7 Replace spool assy.
in T-1
Exhaust Hole P-8 Replace spool assy.
in T-2