BENDIX E-7 DUAL BRAKE VALVE Manual - Página 5

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7. Insert relay piston spring (5) and relay piston in top end

of lower static piston, and primary circuit piston spring

(8) and primary circuit piston assembly in the bottom of

lower static piston.

8. Install stem bolt through bore of relay piston, invert entire

lower static piston assembly and position over a

screwdriver mounted in a vise. Engage screwdriver blade

in slot in head of stem.

9. Depress primary circuit piston assembly against spring

until locking groove is accessible through rectangular

hole in side of lower static piston. Engage a screwdriver

or wire in locking groove and release pressure on piston.

10. Install stem spring, (23), spring seat, (15) and stem nut,

(14). Torque to 20-30 inch Ibs.

11. Install lower static piston assembly in valve body. Install

retainer, (18), making certain locking tabs engage boss

on valve body.

PEDAL ASSEMBLY

Install pedal assembly using three cap screws. Check to be

certain plunger is in contact with spring seat. The stop but-

ton should be adjusted so that the roller and plunger contact

after adjustment, roller should be able to be turned freely by

thumb.

SLACK

ADJUSTER

FIGURE 3 - TYPICAL PIPING SCHEMATIC

MV-3

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MANIFOLD

VALVE

TRAILER

CONTROL

VALVE

BRAKE

CHAMBER

DUAL BRAKE

VALVE

AIR DRYER

SUPPLY

RESERVOIR

COMPRESSOR

SERVICE CHECKS

OPERATING

Check the delivery pressure of both primary and secondary

circuits using accurate test gauges. Depress the pedal to

several positions between the fully released and fully ap-

plied positions, and check the delivered pressure on the

test gauges to see that it varies proportionately with the

movement of the brake pedal.

When the treadle is fully applied, the reading on the test

gauge should fall off to zero promptly when the application

is released. It should be noted that the primary circuit delivery

pressure will be about 2 psi greater than secondary circuit

delivery pressure with primary and secondary circuit supply

reservoirs at the same pressure. This is normal in this valve.

LEAKAGE

1. Make and hold full brake application.

2. Coat the exhaust port and body of the brake valve with

soap solution.

3. Leakage not to exceed a 1" bubble in 3 seconds in both

the applied and released position.

If the brake valve does not function as described above or

leakage is excessive, it is recommended that it be replaced

with a genuine Bendix new or remanufactured unit, available

at your local authorized Bendix parts outlet.

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TP-5

TRACTOR

PROTECTION VALVE

DOUBLE

CHECK

VALVE

#1 SERVICE

#2 SERVICE

RESERVOIR

SLACK

SPRING

ADJUSTER

BRAKES

QUICK

RELEASE

VALVE

BP-R1

BOBTAIL

PROPORTIONING

VALVE

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