ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0053 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
HIGH PRESSURE PUMPS
4. If replacing the pump, perform the following steps:
a. Remove the cover plate from the pump mounting flange (see Figure 3).
b. Loosen the set screw on the pump coupling and remove the coupling from the shaft.
c. Remove the pump shaft key.
COVER PLATE
RUBBER COUPLING INSERT
MOTOR COUPLING
PUMP FLANGE
SHAFT KEY
PUMP COUPLING
SET SCREW
Figure 3. High Pressure Pump Coupling Removal
d. Clean and inspect the motor for corrosion and damage.
CAUTION
Do NOT turn the high-pressure pump shaft by hand for any reason. Turn the motor
shaft if it is necessary to align the pump and motor couplings. Failure to observe
this caution may result in serious damage to the pump.
e. Apply antiseize compound to the pump shaft, the pump coupling, the coupling set screw,
and the shaft key.
f. Install the shaft key and coupling on the pump shaft, but do NOT tighten the setscrew.
5. Install the high-pressure pump on the motor as follows (see Figure 3):
a. Align the motor coupling and rubber coupling insert with the pump coupling as follows:
1) Remove the four motor fan cover screws and the motor fan cover (see Figure 2).
2) Turn the fan by hand to rotate and align the motor coupling.
3) Do NOT turn the pump shaft.
b. Fit the motor coupling and pump coupling together and the pump flange up to the motor.
c. Secure the flange to the motor using the 4 bolts and 4 lock washers removed earlier.
d. Do NOT tighten the pump coupling set screw at this time. It will be tightened later.
e. Install the motor fan cover and secure with the 4 screws removed earlier.
6. Install the high pressure pump assembly onto the TWPS as described in this WP under the
headings High Pressure Pump Assembly Replacement.
7. Before tightening the set screw(s) on the pump coupling, perform the following:
a. Perform an initial startup as described in WP 0014 through starting the RO feed pumps.
(Starting the RO feed pump pressurizes the inlet and outlet of the high-pressure pump
and properly position the cam inside the high-pressure pump.)
0053 00-5
