ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
GENERAL MAINTENANCE
Limit Stop Replacement:
Parts (TM 10-4610-309-24P):
Limit Stop Assembly
Material:
Antiseizing tape (BII) (WP 0079, Table 1, item 43, 44)
Equipment Condition:
TWPS in Standby Shutdown with Drain-Down
MF Lower Feed Inlet Valve V-113 is the only butterfly valve on the TWPS that has a limit stop assembly.
The limit stop replacement procedures listed here may be used to replace the limit stop assembly or for
ensuring proper limit stop installation when replacing the valve or actuator for MF Lower Feed Inlet Valve
V-113. Replace the limit stop as follows:
1. Back the stop screws most of the way out of the limit stop body.
2. Remove MF Lower Feed Inlet Valve V-113 from the TWPS and remove the actuator from the
valve. Refer to the Butterfly Valve Replacement procedures.
3. If replacing an existing limit stop assembly, remove the old limit stop cam, body, and threaded
studs from the bottom of the actuator.
4. Install a limit stop assembly as follows:
a. Secure the actuator in a vise with the bottom of the actuator facing up.
b. Make sure the valve shaft adapter and adapter sleeve are inserted into the actuator bore
so that when the valve is assembled onto the actuator, the valve body will be aligned with
the actuator as shown in Figure 8).
ACTUATOR
ADAPTER SLEEVE
VALVE SHAFT ADAPTER
THREADED STUD
VALVE SHAFT ADAPTER
ADAPTER SLEEVE
STOP SCREW
LIMIT STOP BODY
LIMIT STOP CAM
VALVE STEM BUSHING
VALVE BODY
ACTUATOR BORE
LOCK WASHER
HEX NUT
Figure 8. Valve Shaft Adapter and Adapter Sleeve Installation.
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