Section 6
MAINTENANCE
25
* Repair Kit P/N 250020-353
Figure 6-6 Sullicon Control (P/N 011682-003)
PILOT PRESSURE REGULATOR VALVE MAIN-
TENANCE
Refer to Figure 6-7. Pressure regulator valve (P/N
048059) maintenance normally requires the replace-
ment of the internal diaphragm. Use repair kit no.
048409 and follow the procedure below for proper in-
stallation.
1. Loosen the locknut and turn the adjusting screw
counterclockwise until the inner spring tension is
relieved. The adjusting screw should turn freely
when the spring tension is relieved.
2. Remove the spring chamber from the body to al-
low access to internal parts.
3. Next, remove the spring button and the spring.
The dampener will stayinside thespring as it is re-
moved. Leave the dampener inside the spring as
there is no need to remove it.
4. After removing the spring, remove the diaphragm
stop.
5. At this time, remove the pressure plate nut and
disassemble the pressure plate, diaphragm, dia-
phragm gasket (rubberized asbestos), seat disc
and seat gasket.
6. Remove and discard the seat ring.
7. The next step is to reassemble the regulator using
the new parts provided in the repair kit.
8. Reassemble the diaphragm, pressure plate, dia-
phragm gasket, seat disc and seat disc gasket
and tighten the nut. All of the these parts with the
exception of pressure plate are provided in the re-
pair kit.
9. Replace the seat ring with the new seat ring pro-
vided.
10. Replace the existing diaphragm stop.
11. Next, place these parts in their properplace on the
body and replace the spring as it was prior to dis-
assembly.
12. Place the spring button over the spring as shown.
13. With all parts in order, replace the spring chamber
and tighten.
14. Tighten the adjusting screw until tension is real-
ized.
15. At this time, refer to Control System Adjustment
Procedure to readjust the control regulator.
CONTROL PRESSURE REGULATOR VALVE
Refer to Figure 6-8. Maintenance for the control
pressure regulator valve (P/N 048354) normally re-
quires the replacement of the internal diaphragm.
Use repair kit no. 048410, and follow the procedure
below for proper installation.
1. Loosen the locknut and turn the adjusting screw
counterclockwise until the inner spring tension is
relieved. The adjusting screw should turn freely
Figure 6-7 Pressure Regulator Valve
* Repair Kit P/N 048409
(P/N 048059)
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