BENDIX E-10 Service Data - Page 5

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15. Disassemble the primary piston by rotating the spring

seat nut (25) counterclockwise. Separate the spring

seat nut, spring seat (26), rubber spring (27) and

remove the piston o-ring (28).

16. Remove the large (30) and small (31) o-rings from the

relay piston (20).

17. Remove the retaining ring (32) securing the primary

inlet and exhaust valve assembly (33) in the upper body

and remove the valve assembly.

CLEANING AND INSPECTION

1. Wash all metal parts in mineral spirits and dry.

2. Inspect all parts for excessive wear or deterioration.

3. Inspect the valve seats for nicks or burrs.

4. Check the springs for cracks or corrosion.

5. Replace all rubber parts and any part not found to

be serviceable during inspection, using only genuine

Bendix

brand replacement parts.

ASSEMBLY

Prior to reassembling, lubricate all o-rings, o-ring grooves,

piston bores and metal to metal moving surfaces with Dow

Corning 55 M pneumatic grease (Bendix piece number

291126).

Note: All torques speciﬁ ed in this manual are assembly

torques and can be expected to fall off, after assembly

is accomplished. Do not retorque after initial assembly

torques fall.

1. Install the primary inlet and exhaust assembly (33) in

the upper body and replace the retaining ring (32) to

secure it. Be sure the retaining ring is seated completely

in its groove.

2. Install the large (30) and small (31) o-rings on the relay

piston.

3. Install the primary piston o-ring (28) in the piston o-ring

groove.

BENDIX

E-6

BRAKE VALVE ONLY:

4. Install the rubber spring (do not lubricate) (27), concave

side down in the primary piston (22) and place the

spring seat (26), ﬂ at side up, over the rubber spring.

5. Install the primary piston spring seat nut (25), with its

hex closest to the spring seat, and rotate clockwise

until the top surface of the spring seat is even with the

top surface of the piston. Set aside.

6. Install large (30) and small (31) o-rings on relay piston

(20).

7. Place relay piston, spring (21) (if used) in concave

portion of relay piston and install relay piston through

No. 1 inlet/exhaust assembly (33) and into under side

of upper body.

8. Place screwdriver, blade up, in vise. Place stem (17) in

relay piston upper body sub assembly over the blade

of the screwdriver with blade engaged in the slot in the

head of the stem.

9. Place the washer (24) over the stem. This washer

should be installed in all valves.

10. Install primary return spring (23) in upper body piston

bore.

11. Install the primary piston rubber spring sub assembly

(steps 4 & 5) over the stem, into the upper body piston

bore.

12. Compress the primary and relay pistons into the upper

body from either side and hold them compressed,

either manually or mechanically. See the cautionary

note under step 11 in the Disassembly section of this

manual.

13. Place the stem spring (19) over the spring seat nut (25)

and the spring seat (18) over the stem.

14. Install the lock nut (16) on the stem and torque to

20 - 30 inch pounds.

15. Install the primary piston retainer (15) over the piston,

making certain all three lock tabs have engaged the

outer lip of the body.

GENERAL SAFETY GUIDELINES

WARNING! PLEASE READ AND FOLLOW

THESE INSTRUCTIONS TO AVOID PERSONAL

INJURY OR DEATH:

When working on or around a vehicle, the following

general precautions should be observed at all

times.

1. Park the vehicle on a level surface, apply the

parking brakes, and always block the wheels.

Always wear safety glasses.

2. Stop the engine and remove ignition key when

working under or around the vehicle. When

working in the engine compartment, the engine

should be shut off and the ignition key should be

removed. Where circumstances require that the

engine be in operation, EXTREME CAUTION should

be used to prevent personal injury resulting from

contact with moving, rotating, leaking, heated or

electrically charged components.

3. Do not attempt to install, remove, disassemble

or assemble a component until you have read

and thoroughly understand the recommended

procedures. Use only the proper tools and observe

all precautions pertaining to use of those tools.