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
The 2000 Hour PMCS procedures include the performance of the 1000 hour PMCS and the following
additional Items: replacement of the high pressure pump piston cluster and shaft seal assembly.
Perform high-pressure pump 2000-hour PMCS as follows:
1. Remove the high-pressure pump assembly. Refer to High Pressure Pump Assembly
Replacement.
2. Remove the pump from its motor. Refer to High Pressure Pump or Motor Replacement.
3. Disassemble the high-pressure pump. Refer to SERVICE and 1000-Hour High Pressure Pump
PMCS.
NOTE
Do not rotate the high-pressure pump shaft by hand. Rinse all parts as they are
removed. Do not scratch or soil any bearing surfaces, metal or plastic. To simplify
your work, keep the pump mounted to the flange and work on the pump in the
vertical position. Work on the pump in a clean area. Note the orientation of all
parts relative to the flange and the motor.
To remove the cam spacer, it may be necessary to gently tap the spacer upwards
with a rubber mallet to free it from the bearing plate. Take care not to cut or nick
the O-ring or the alignment lip.
4. Continue disassembling the pump as follows:
a. Remove the cam spacer (see Figure 15):
CAM SPACER
Figure 15. High Pressure Pump Spacer Removal.
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