BENDIX BW2066 ユーザーズマニュアル

Refer to Figures 4, 5 and 6 for item numbers referenced 
in parenthesis.

The Bendix

®

 E-8P

™

 (Figure 1) and E-10P

™

 (Figure 2) 

dual brake valves are fl oor mounted, treadle operated 
type brake valves with two separate supply and delivery 
circuits for service (primary and secondary) braking, which 
provides the driver with a graduated control for applying and 
releasing the vehicle brakes.

The E-10P

™

 dual brake valve (Figure 2) is similar to the 

E-8P

™

 dual brake valve except that a metal coil spring 

(5) housed in an upper body assembly replaces the 
rubber spring (27) used in the E-8P

™

 valve. The use 

of a metal coil spring (and the upper body assem-
bly) provides greater treadle travel and, therefore, 
provides the driver with a less sensitive “feel” when 
making a brake application. The E-10P

™

 dual brake 

valve is generally used on buses, where smooth brake 
applications contribute to passenger comfort.

The circuits in the E-8P

™

/E-10P

™

 dual brake valves are 

identifi ed as follows: The No. 1 or primary circuit is that 
portion of the valve between the spring seat which contacts 
the plunger and the relay piston; the No. 2 or secondary 
circuit is that portion between the relay piston and the 
exhaust cavity.

The primary circuit of the valve is similar in operation to a 
standard single circuit air brake valve and under normal 
operating conditions the secondary circuit is similar in 
operation to a relay valve.

Both primary and secondary circuits of the brake valve use 
a common exhaust protected by an exhaust diaphragm.

VALVE

MOUNTING 

PLATE

TREADLE

SUPPLY

DELIVERY

(4)

AUXILIARY

SUPPLY

VALVE

MOUNTING 

PLATE

TREADLE

DELIVERY

(4)

SUPPLY

(4)

EXHAUST

EXHAUST