BENDIX R-12P PILOT RELAY VALVE Handbuch - Seite 8

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CLEANING & INSPECTION

1. Using mineral spirits or an equivalent solvent, clean and

thoroughly dry all metal parts. Do not damage bores

with metal tools.

2. Wash all non-metallic components in a soap and water

solution. Dry thoroughly.

3. Inspect interior and exterior of all metal parts for severe

corrosion, pitting, and cracks. Superﬁ cial corrosion

and/or pitting on the exterior of the body and cover

is acceptable. Replace the entire valve if the body or

cover interior show signs of corrosion or pitting.

4. After washing, inspect relay piston for cracks, wear,

or distortion. Replace the valve if these conditions are

found.

5. Make certain the air channel running from the cover

through the top surface of the body to the supply port

is clear and free of obstruction.

6. Inspect the pipe threads in the body. Make certain they

are clean and free of thread sealant.

7. Inspect all air line ﬁ ttings for corrosion. Replace as

necessary. Remove all old thread sealant before

reuse.

ASSEMBLY

1. Before assembly, lubricate all o-rings, seals, and pistons

as well as body and cover bores, using the lubricant

provided in the maintenance kit. Use all of the lubricant,

and spread it evenly on all rubbing surfaces.

2. Install valve retainer(11) on inlet/exhaust valve(12) so

that the ﬂ ange of the retainer surrounds the rubber

portion of the valve.

3. Install inlet/exhaust valve(12) in the body.

4. Install valve spring(10) over the inlet/exhaust valve in

the body.

5. Install large and small diameter o-rings(8) and (9) in

exhaust cover(7).

6. Place the exhaust cover on the inlet/exhaust valve

spring. Then depress the cover against the spring's

force into the body. Secure the cover with snap

ring(6).

7. Install o-rings(4) and (5) onto the relay piston. Then

place the reserve spring in the piston and install the

piston into the body.

8. Install the load piston's o-ring(3) onto the load piston.

Then install the load piston into the cover, small end

ﬁ rst.

9. Install small o-ring(1) that seals the internal channel

and large o-ring(2) onto the cover.

10. Place the cover on the body and secure with its four

fasteners. Torque to 120 - 150 in. lbs.

11. Perform OPERATIONAL AND LEAKAGE TESTS before

returning the vehicle to service.