BENDIX SD-03-817 User Manual download pdf

SD-03-817

Bendix

E-6

& E-10

™

Dual Brake Valves

DESCRIPTION

The Bendix

E-6

(Figure 1) and E-10

™

(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. Each

provides the driver with a graduated control for applying

and releasing the vehicle brakes.

The E-10

™

dual brake valve (Figure 2) is similar to the E-6

dual brake valve except that a metal coil spring housed in

an upper body assembly replaces the rubber spring used

in the E-6

valve. The use of a metal coil spring (and the

upper body assembly) provides greater treadle travel and,

therefore, provides the driver with a less sensitive “feel”

when making a brake application. The E-10

™

dual brake

valve is generally used on buses, where smooth brake

applications contribute to passenger comfort.

The circuits in the Bendix

E-6/E-10 dual brake valves are

identiﬁ ed as follows: The primary circuit is that portion of the

valve between the spring seat which contacts the plunger

and the relay piston; the 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.

OPERATION

APPLYING: NORMAL OPERATION - PRIMARY

CIRCUIT PORTION

When the brake treadle is depressed, the plunger exerts

force on the spring seat, graduating spring, and primary

piston. The primary piston, which contains the exhaust

valve seat, closes the primary exhaust valve. As the

exhaust valve closes, the primary inlet valve is moved

off its seat, allowing primary air to ﬂ ow out the primary

delivery port.

FIGURE 1 - BENDIX

E-6

DUAL BRAKE VALVE

FIGURE 2 - BENDIX

E-10

™

DUAL BRAKE VALVE

3/8” P.T.

PRIMARY

DELIVERY

3/8” P.T.

PRIMARY

SUPPLY

3/8” P.T.

SECONDARY

DELIVERY

EXHAUST

3/8” P.T.

SECONDARY

SUPPLY

TREADLE

MOUNTING

PLATE

3/8” P.T.

PRIMARY

SUPPLY

3/8” P.T.

SECONDARY

SUPPLY

3/8” P.T.

PRIMARY

DELIVERY

EXHAUST

3/8” P.T.

SECONDARY

DELIVERY

MOUNTING

PLATE

TREADLE

BOOT

1 2 3 4 5 6

Summary of Contents

Page 1 - Dual Brake Valves

1SD-03-817Bendix® E-6® & E-10™ Dual Brake ValvesDESCRIPTIONThe Bendix® E-6® (Figure 1) and E-10™ (Figure 2) dual brake valves are ﬂ oor-mounted, t

Page 2

2delivery ports – the primary piston will mechanically move the relay piston, allowing the piston to close the secondary exhaust valve and open the se

Page 3 - PREVENTIVE MAINTENANCE

3the effort exerted by the driver’s foot on the treadle. A balanced position in the secondary portion is reached when air pressure on the secondary si

Page 4 - SERVICE CHECKS

4SERVICE CHECKSOPERATING CHECKCheck the delivery pressure of both primary and secondary circuits using accurate test gauges. Depress the treadle to se

Page 5 - INJURY OR DEATH:

515. Disassemble the primary piston by rotating the spring seat nut (25) counterclockwise. Separate the spring seat nut, spring seat (26), rubber spri

Page 6

64. If the work is being performed on the vehicle’s air brake system, or any auxiliary pressurized air systems, make certain to drain the air pressure

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BENDIX SD-03-817 User Manual

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Summary of Contents

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