Section 6
MAINTENANCE
24
* Repair Kit P/N 250020---353
Figure 6---6 Sullicon Control (P/N 011682 ---003)
Figure 6---12 for the location). When the jam nut is
loosened, turn the adjusting screw clockwise to in-
crease or counterclockwise to decrease the set-
ting.
Above 100 PSIG (689kPa), the regulator should al-
low pressure to flow into the control chamber of the
Sullicon Control (P/N 011682---003). The Sullicon
Control lever should start t o move a t t his t ime. Cy -
cle the Control System several times and recheck
all pressure settings. For Sullicon Control replace -
ment, order repair kit number 250020---353.
MINIMUM PRESSURE VALVE ACTUATOR
MAINTENANCE
Refer t o Figure 6 --- 7. Under n ormal circumstances,
the only maintenance required would be the
changing of the seal cups, o---rings and wiper seal.
Use repair kit number 001116, and follow the pro-
cedure explained below for proper repair.
1. Remove the spherical rod end from the end of
the actuator.
2. Evenly remove the nuts securing front end cap.
Exercise extreme caution when removing the
nuts as the end cap is under heavy spring ten-
sion. Hold the end cap in place while removing
the nuts and ease the end cap off until the spring
tension is relieved.
3. Remove the spring.
4. Pull the piston rod and piston from the cylinder to
change the seal cups and o---ring.
5. Disassemble the pistons and seal cups by re-
moving the !@4” nut on the end of the piston.
6. Remove and replace the o---rings on each pis-
ton. Lubricate the piston o---rings with Parker
Super “O” Seal or an equivalent quality silico-
ne---based lubricant. Re---assemble the pistons
and seal cups using the new seal cups. Coat the
seal cups with the silicone---base lubricant and
slide the piston rod with the assembled pistons
and seal cups into t he cylinder to prevent dirt
from coming in contact with the seal cups.
7. Remove and replace the o---rings which seal the
end caps and cylinder. These o---rings are lo-
catedineachendcap.
8. A rod wiper seal is also provided with t he kit. Re-
move and replace this seal. Prior to installing the
new seal, lubricate with silicone lubricant.
9. With all new parts installed, the actuator is now
ready to be reassembled. Position the cylinder
back in place over the rear end cap and run the
tie studs through the 4 holes in the end cap.
10. If you haven’t placed the piston rod and seal cup
assembly into the cylinder, do that at this time.
11. Replace the spring.
12. The next step is to replace the front end cap. A
significant amount of spring tension is realized
when attempting to replace the end cap. It will
be necessary to use a large clamp to overcome
the s pring tension. Push the end cap into place
and hold while replacing the nuts to secure the
end cap.
13. Tighten t he nuts on t he end caps a nd replace t he
rod end jam nut on the exposed end of the pis-
ton rod.
14. Reinstall the actuator.
DRIVE COUPLING INSTALLATION AND ALIGN-
MENT
Refer t o Figures 6 --- 8 a nd 6 --- 9. For coupling instal -
lation and alignment, the tools required will be one
set of standard allen wrenches, one set of standard
socket wrenches and a dial indicator. Should a dial
indicator not be available, an alternate method of
checking the a lignment may be used as a second-
ary or less desirable technique. This method of
checking is done by careful use of a square, feeler
gauge and a set of outside calipers (see Figure
6 --- 9 ) . T h os e s p e c if ic a t ion s in Ta b le 1 w h ic h a r e
designated in inches are provided for this method.
When you are changing the element, DO NOT at -
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