BENDIX LQ-5 BOBTAIL RATIO VALVE Manual - Página 7

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5. Make certain all air channels are clear and free of

obstruction.

6. Inspect all pipe threads and make sure they are clean

and free of thread sealant.

7. Inspect all air line fittings for corrosion and replace as

necessary.

ASSEMBLY

1. Before assembly, lubricate o-rings, pistons, and body

and cover bores with the lubricant in the Bendix mainte-

nance kit.

2. Install o-rings (3 & 4) on proportioning piston. Install

o-rings (2 & 4) on blend back piston. Install o-ring (1) on

cover.

3. Place inlet/exhaust valve (5) into the inner diameter of

the proportioning piston and retain with valve spring (6).

Use needle nose pliers to install the spring by grasping

it on the bar that intersects its end and turning clock-

wise while pressing down. The bar must be away from

(not touching) the valve.

Note: Make sure spring coils do not overlap each other

as the spring compresses into the proportioning piston.

Also, make sure the valve is square, contacts the seat,

and doesn't bind.

4. Insert the proportioning piston into the small bore of the

blend back piston and install the piston assembly in the

body.

5. Install spring seat into the piston assembly bore, small

end first.

6. Install the "initial delivery" spring on the inner wall of the

spring seat.

7. Install the blend back spring in the inner diameter of the

blend back piston so that it surrounds the "initial

delivery" spring.

8. Place the cover on the body in the proper position, as

marked in Disassembly, Step 2. Make sure the springs

are square when the cover is attached to the body.

9. Using the Phillips head screws and their lock-washers,

secure the cover to the body. Torque the screws to 50-

80 inch pounds.

10. Install all air line fittings, making sure thread sealing

material does not enter the valve.

™

11. Mount LQ-5

valve on the vehicle and perform Operation

and Leakage Tests before returning the vehicle to

service.