ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
REVERSE OSMOSIS SYSTEM
PUMP CASING GASKET
STATIONARY SEAT GASKET
INTERNAL BYPASS HOLE
IMPELLER
PUMP COVER
SLEEVE
SEAL
SCREW GASKET
KEY
MOTOR
O-RING SPRING SCREW
CAP SCREW
STATIONARY SEAT
ADAPTER
MOTOR DRIVE SHAFT
Figure 22. RO Feed Pump Installation.
7. If the wear ring is damaged, replace it as follows (see Figure 23):
a. Drill a hole through the wear ring in two places opposite each other. Be careful not to
damage the pump casing.
b. Crack the remaining ring wall and remove the wear ring.
c. Make sure the surfaces of the new wear ring and the pump casing where the ring is to be
installed are free of burrs. Remove any burrs with a fine emery cloth.
d. Press the new wear ring into place.
e. Evenly drive the ring into place.
PUMP CASING
WEAR RING
EXAMPLE OF WHERE
TO DRILL HOLES
Figure 23. Wear Ring Removal.
8. Reinstall the pump casing as follows:
a. Install a new pump casing gasket on the shoulder of the pump cover.
b. Position the pump casing so that the pump discharge flange points toward you when the
motor is on your left and the pump is on your right.
c. Place the new pump casing onto the pump cover and secure with the eight cap screws.
d. Tighten the cap screws uniformly.
e. Clean off any tape residue remaining on the threads of the street elbow pipes.
f. Wrap antiseizing tape on the elbow pipe threads and screw the street elbow into the
pump casing. Make sure the elbow, drain valve, and hose are facing in the same
direction as the pump discharge flange.
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