ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0066 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
GENERAL MAINTENANCE
CAUTION
Do NOT use the travel stop screws to move or reposition the actuator pinion shaft.
Failure to observe this caution will result in damage to cams on the pinion shaft or
to the ends of the stop screws.
m. Set the actuator travel stops as follows (see Figure 24):
1) Thread a lock nut onto both of the two travel stop screws.
2) Fit a sealing washer onto both of the two travel stop screws.
3) With the actuator setting on its baseplate and the air connection plate facing you,
screw in the left travel stop screw to an estimated position.
4) Apply 100-120 psig air to port "A" to fully operate the actuator.
5) Check the position indicator. With the air connection plate facing you, release air
pressure as necessary until the position indicator is pointing as follows:
a) To the left end of the actuator with a normally closed valve.
b) To the air connection plate with a normally open valve.
6) Reset the travel stop screw then tighten the lock nut to secure the stop screw.
7) Screw in the right travel stop screw to an estimated position.
8) Apply 100-120 psig air to port "A" again to fully operate the actuator.
9) With the air connection plate facing you, release air pressure as necessary until
the position indicator is pointing as follows:
a) To the left end of the actuator with a normally closed valve.
b) To the air connection plate with a normally open valve.
10) Reset the travel stop screw then tighten the lock nut to secure the stop screw.
POSITION INDICATOR FOR
NORMALLY CLOSED VALVE
BEFORE AIR IS APPLIED
LOCK NUT
TRAVEL STOP SCREW
PORT A
AIR CONNECTION PLATE
Figure 24. Actuator Travel Stops.
5. Secure the actuator to the butterfly valve. Refer to Butterfly Valve Replacement.
6. Secure the butterfly valve assembly to the TWPS. Refer to Butterfly Valve Replacement
0066 00-26
