Minimum Pressure/Check Valve Maintenance; Solenoid Valve Maintenance - Sullair 10B Series Operator's Manual

Section 6
MAINTENANCE
NOT tighten either coupling until the entire joint
has been assembled.
2. Tighten the nuts to the torque valve shown in Ta-
ble 2. RECOMMENDED ASSEMBLY TOR--
QUE MUST BE MAINTAINED. Re---tightening
of the coupler will be necessary if leakage oc-
curs.
SPECIAL NOTES
1. Assembly of the gaskets can be made easier by
dipping the gaskets in water or the oil to be
sealed. DO NOT USE THE RUBBER LUBRI-
CANTS.
2. Flexible joints are not intended to support end
loads caused by internal pressure or other
forces causing pipe separation.
MINIMUM PRESSURE/CHECK VALVE MAINTE-
NANCE
Refer t o Figure 6 ---
valve (P/N 241581) maintenance is quite minimal.
The only part which normally requires replacement
is the o---ring on the piston. To replace this ring, or-
der seal repair kit no. 250020---344 and follow the
procedure explained below.
Before performing maintenance on the valve, be
sure that all pressure has been relieved in the
compressor sump, and all downstream pressure
has been vented to the atmosphere. Also be sure
that the components of the compressor are cool
to the touch.
1. Unscrew the minimum pressure/check valve (P/
N 241581) from the receiver cover.
2. Remove the hexagonal retaining cap from the
main body.
3. Remove the flat washer and heavy spring from
the main body.
4. Tap the piston assembly (with a screwdriver)
from the bottom of the main body and remove.
The o---ring will now be seen easily.
5. Remove the seal ring and discard.
6. Clean piston assembly and valve thoroughly.
7. Replace seal ring and coat the piston and seal
with Parker Super "O" Ring Seal or an equivalent
quality grease.
Extreme caution should be used when removing
the cap from the body because there is spring
tension on the cap.
8. Reset piston assembly into the main body and
reposition spring and flat washer.
9. Replace retaining cap.
10. Reattach valve to receiver cover and reconnect
all piping.
SOLENOI D VA LVE M A I NTENA NCE
Refer t o Figure
250017---993) maintenance is quite minimal but a
periodic cleaning is desirable. The time between
cleanings will vary depending on operating condi-
30
11. Minimum pressure/ check
WARNING
!
WARNING
!
6 --- 12. Solenoid va lve (P/ N
Figure 6 ---11 Minimum Pressure / Check Valve
(P/N 241581)
* Repair Kit P/N 250026---758
tions. In general, if the voltage to the coils is correct,
sluggish valve operation or excessive leakage will
indicate that cleaning is required. If parts replace-
ment is required, order repair kit number
250018---970 or number 250018---971 and follow
the procedure explained below:
!
Turn off all power, relieve line pressure, and dis-
connect coil lead wires to the valve before making
repairs.
It is not necessary to remove the valve from the pipe
line for repairs.
DISASSEMBLY AND REASSEMBLY
1. Remove the retaining cap and slip the entire so-
lenoid off the solenoid base subassembly.
2. Unscrew the solenoid base assembly. Remove
the core assembly, core spring and body gas-
ket.
3. Next, remove the end cap, body gasket, disc
spring, and disc holder assembly.
4. All parts are now accessible for cleaning or re-
placement. Replace worn or damaged parts
with repair kit number 250018---970 for best re-
sults.
WARNING