ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
0016 00
OPERATOR INSTRUCTIONS
MAINTAINING NORMAL OPERATION UNDER USUAL CONDITIONS
MF Sonic Test:
The sonic test holds the air pressure by leaving the air valve open. Leakage may be a result of leaking
filtrate valve V202 or O-rings as well as broken fibers.
Perform the MF Sonic Test as follows:
1.
Set the System Mode Switch to Fill/Hold.
2.
When the Fill/Hold cycle is completed, set the System Mode Switch back to Standby.
3.
Set the MF Test Switch to SONIC.
4.
Listen for the sound of air bubbling through water as follows (see Figure 5):
a. Remove the Mechanic's Stethoscope from the toolbox.
b. Place the end on the body of the Filtrate Flow Control Valve V-202. Leakage is noted by
noise heard with the stethoscope.
c. If the leak is at V-202, notify unit maintenance and continue operation. There is no
problem with the MF elements.
d. If the leakage is not at V-202, continue and listen to each MF module starting at the top
collar and moving down to the bottom collar.
FILTRATE FLOW
CONTROL VALVE
V-202
MECHANIC'S
STETHOSCOPE
Figure 5. Performing the MF Sonic Test.
5. If the leak is limited to one or two MF modules, isolate the modules by turning both their top and
bottom filtrate valves off as follows (see Figure 6):
a. Remove the MF Valve Tool from the toolbox.
b. Press in the Tee handle to open the jaws of the tool. The jaws fit over the valve stem.
c. Push the tool up through the hole in the TWPS frame below the module to be isolated.
d. Engage the valve stem with the valve tool jaws.
e. Turn the valve stem turn clockwise.
f. Pull the valve outwards, then turn the valve turn counter-clockwise.
g. Repeat for the valve at the top of the module.
0016 00-13
