RAP R11: Low Pressure Air Relay Valve Service and Adjustment
ARV-VA001-102-00
05/05/11
Air Relay Valve
Page 1
Figure 1: Air Relay Valve with 1-1/4 Diaphragm
A.
Disassemble and Clean
Information enclosed in brackets (item 1 etc.) is in reference to the complete assembly
drawings on page 6 and the illustrations throughout the document.
1. Remove spring retainer (item 2), adjusting cap (item 3) and locknut (item 4), by
unscrewing as a unit, from the body (item 1) and set aside.
2. Remove diaphragm cylinder assembly (item 9), by unscrewing as a unit, from the
body (item 1) and set aside.
3. Slowly pull valve stem (item 7) out of body (item 1) and set aside on a clean surface.
4. Carefully remove end valve sleeves (item 6) and center valve sleeve (item 5).
Note how they go together.
5. Clean stem (item 7) with a soft
cloth, Do Not scratch the stem.
Clean the end sleeves (item 6) and
center sleeve (item 5).
6. Lubricate and install new outer o-
ring (item 10) and install new inner
o-ring (item 11), without lube, on
one end sleeve (item 6). From the
spring retainer end, fit the end
sleeve into the bore of the body
with the o-rings toward the spring
retainer threads. Insert the sleeve
until the outer o-ring is about to
enter the bore. (See Figure 2.)
Figure 2: Placing End Sleeve Seals
Adjusting Cap (3)
Locknut (4)
Spring Retainer (2)
Body (1)
Diaphragm Cylinder Assembly (9)
