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FIGURE 10 - EXPLODED VIEW
INSTALLATION
1. Use the mounting bracket provided, or, if securing the
valve to a reservoir, use a Schedule 80 (heavy wall)
short couple pipe nipple.
2. Reconnect all air lines to the valve using the
identifi cation made during removal. Be sure to use pipe
thread sealant.
3. Test all air fi ttings for excessive leakage and tighten as
needed. Also, perform OPERATIONAL AND LEAKAGE
TESTS before placing the vehicle back into service.
DISASSEMBLY
The following procedure is for reference only. Always
have the appropriate maintenance kit on hand, and use
its instructions in lieu of those presented here. Refer to
Figure 10 throughout.
CAUTION: The R-12P
™
a bench vise during disassembly. However,
overclamping will cause damage to the valve
and result in leakage and/or malfunction. If a
vise is used, position the valve so the jaws
bear on the supply ports on opposing sides
of the valve's body.
FASTENER
1
valve may be lightly clamped in
COVER
LOAD
PISTON
3
2
RESERVE
SPRING
BODY
12
11
10
9
8
1. Remove the four fasteners that secure the cover to the
body. Then slowly remove the cover.
2. Remove and discard the small o-ring(1) that seals the
internal channel and the large o-ring(2) between the
cover and the body.
3. Remove the load piston from the cover. Note: If
necessary, use approximately 20 psi of shop air,
directed into the load piston's air passage in the cover,
to dislodge it. CAUTION: The piston will leave the cover
with some force.
4. Remove and discard the load piston's o-ring(3).
5. Remove the reserve spring and the relay piston from the
body. Remove and discard the relay piston's o-rings(4)
and (5).
6. While holding exhaust cover(7), remove and discard
the snap ring(6) that secures the cover to the body.
7. Remove and discard exhaust cover(7) and its o-rings(8)
and (9).
8. Remove and discard valve spring(10), valve retainer(11),
and inlet/exhaust valve(12) from the body.
RELAY PISTON
4
5
7
6
7
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