BENDIX PP-7 TRAILER SUPPLY VALVE

2
Double Check
Valve
#1 Service
Reservoir
PP-7
™
Control
Valve
Modulator
Park
Control
DS-1
Supply
Reservoir
TP-3
™
Tractor Protection
#2 Service
Reservoir
LQ-3
™
Valve
E-7
™
Dual
Brake Valve
LP-3
™
Low
Pressure Indicator
SB-3
SR-1
™
Spring
Brake Valve
R-8
™
RELAY
VALVE
SB-3
SB-3 SB-3
TRACTOR DUAL AIR BRAKE SYSTEM
FIGURE 3 - PIPING DIAGRAM
FIGURE 4 - PP-7
™
TRAILER SUPPLY VALVE LESS THAN 50 PSI SYSTEM PRESSURE
PP-7
™
VALVE LESS THAN 50 PSI
SYSTEM PRESSURE
#1 Service
Reservoir
#2 Service
Reservoir
Double
Check
Valve
Park
Control
Valve
To
Parking
Brakes
Supply
Port
Plunger
Inlet & Exhaust
Exhaust Vent
Control Inlet
and Exhaust
Exhaust
Port
Control
Piston
To Tractor
Protection
Control Port