Minimum Pressure Valve Maintenance; Thermal Valve Maintenance - Sullair 32 250L Series Operator's Manual

Figure 5-5 Sullicon Control
justed by physically propping the pressure switch
contacts open at the plastic contact carrier board
and turning the Sullicon Control stop screw until
the sump pressure gauge reads 40-55 PSI. the
stop screw is turned clockwise to increase the
pressure and counterclockwise to decrease the
pressure.
DANGER
DO NOT touch the electrical contacts
terminal board or leads pressure switch
with any metallic object. Severe electri-
cal shocks will occur.
Cycle the Control System several times and re-
check all pressure settings.

MINIMUM PRESSURE VALVE MAINTENANCE

Refer to Figure 5-6. Minimum Pressure Valve Main-
tenance is quite minimal. The only parts which nor-
mally require replacement are the seal ring on the
piston rod and the "0" rings which seal the housing.
Follow the procedure explained below for replace-
ment of these parts.
1. Evenly remove the four bolts securing the cover
to the housing. CAUTION: This cover is spring
loaded, remove carefully.
2. Remove cover and "0" ring.
MAINTENANCE
3. Remove the spring.
4. Remove piston rod.
5. Remove quad ring.
6. Remove the cover plate and sleeve.
7. Discard the stop and cover plate "0" ring.
8. Clean all parts thoroughly including the cover
bore, housing bore and sleeve.
9. Replace the piston rod quad ring.
10. Coat the piston rod, cover bore, housing bore
and sleeve with Parker Super "0" Lube or an
equivalent quality grease.
11. Replace cover plate "0" ring.
12. Install stop and sleeve.
13. Replace cover plate.
14. Replace piston rod.
15. Install spring.
16. Replace cover "0" ring and cover (tighten bolts
evenly) .

THERMAL VALVE MAINTENANCE

Refer to Figure 5-7. For thermal valve maintenance,
use repair kit number 1084. Follow the procedure
explained below for repair kit installation.
1. Remove appropriate piping for disassembly of
the thermal valve housing.
2. Remove the four (4) capscrews which hold the
housing together and pull the upper housing
away from the lower housing.
3. Remove element.
4. Remove and replace the element seal in the up-
per housing.
5. Remove and replace the "0" ring between the
upper and lower housings.
Figure 5-6 Minimum Pressure Valve
Section 5
19