ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
HIGH PRESSURE PUMPS
High Pressure Pump or Motor Replacement:
Parts (TM 10-4610-309-24P):
High Pressure Pump
High Pressure Pump Motor
Self-Locking Nuts
Materials:
Corrosion preventive compound (WP 0079, Table 1, item 17)
Clean, dry, lint-free rags (WP 0079, Table 1, item 33)
Equipment Condition:
TWPS in standby shutdown (less than four hours) without draining-down.
Replace a High Pressure Pump or Motor as follows:
1. Remove the high pressure pump assembly from the TWPS as described in this WP under the
headings High Pressure Pump Assembly Replacement.
2. Remove the HP Pump from its motor as follows:
CAUTION
Do not turn the high-pressure pump by hand for any reason. Failure to observe
this caution may result in serious damage to the pump.
a. Remove the four bolts and four lock washers that secure the high-pressure pump
mounting flange to the motor.
b. Move the pump back and away from the motor coupling and lay it on a clean work
surface.
RUBBER COUPLING INSERT
MOTOR FAN COVER
HIGH PRESSURE PUMP
MOTOR
MOTOR COUPLING
BOLTS AND WASHERS
MOUNTING FLANGE
Figure 2. Removing the High Pressure Pump from Its Motor.
3. If replacing the motor, perform the following steps:
a. Loosen the set screw on the motor coupling and remove the coupling from the shaft.
b. Remove the motor shaft key.
c. Apply antiseize compound to the new motor shaft, the coupling, the coupling set screw,
and the shaft key.
d. Install the shaft key and coupling on the motor shaft, but do NOT tighten the setscrew.
e. Clean the pump using clean, lint-free rags.
f. Inspect the pump for corrosion, especially around the inlet and outlet connections where
the grooved couplings mount.
g. Inspect the grooved coupling gasket and replace if necessary.
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