ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0066 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
GENERAL MAINTENANCE
REPAIR
Actuator Repair:
Parts (TM 10-4610-309-24P):
Actuator Repair Kit for actuator with a 3-inch valve
Actuator Repair Kit for actuator with a 2-inch valve
Material:
Grease, Molybdenum Disulfide (WP 0079, Table 1, item 23)
Equipment Condition:
Butterfly valve assembly removed from the TWPS and actuator removed from the butterfly valve.
Refer to Butterfly Valve Replacement.
Repair a Actuator as follows:
1. Disassemble the actuator as follows (see Figure 20):
a. Loosen the 2 travel stop lock nuts.
b. Remove the 2 travel stop bolts, 2 lock nuts, and 2 sealing washers.
WARNING
Spring tension. There is spring tension against both actuator end caps. When
removing an end cap, each of the four end cap bolts must be loosened a little at a
time until there is no spring tension on the end cap. Failure to observe this
warning may result in distortion of and damage to the bolts and possible injury
due to the sudden release of the springs.
c.
Remove one of the two end caps as follows:
1) Loosen each of the four end cap bolts a little at a time until there is no spring
tension on the end cap.
2) Finish removing the four end cap bolts and four flat washers.
3) Lift the end cap and the spring assemblies out of the actuator body.
d.
Remove the other end cap in the same manner in which the first end cap was removed.
e.
Remove the pistons as follows:
1) Set the actuator with the base plate facing up.
2) Insert the shaft adapter into the pinion shaft.
3) Insert a suitable tool (such as the nose of a needle nose pliers) into the shaft
adapter and turn the pinion shaft clockwise to force the pistons out of the body.
4) Pull the pistons out of the body.
f.
Remove the four base plate cap head bolts and spring washers from the bottom of the
base plate and gently pull the base plate off the actuator body.
g.
Gently pry the position indicator cap off the top of the pinion shaft (a flat head screw-
driver works well.)
h.
Withdraw the pinion shaft out the bottom of the actuator.
i.
Remove the two air connection plate cap head bolts and washers from the air connection
plate and lift the connection plate off the actuator body.
0066 00-21
