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
NOTE
The thrust bearing assembly of the pump is broken in during factory assembly.
The bearing assembly consists of the cam and thrust bearing. If either of these
components is replaced during service or repair, the bearing assembly must again
be "Broken In".
9. If either or both the CAM or THRUST BEARING were replaced, perform the thrust bearing break-
in procedures as follows:
a. Perform the Start-Up After a Short Term or Standby Shutdown Without Draining
procedures described in WP 0015.
b. Operate the high pressure pump at zero psig discharge pressure for 30 minutes.
c. Raise the discharge pressure in 100-psig increments, operating the pump at each
incremental pressure increase for 30 minutes, until the maximum discharge pressure is
attained.
10. Check for leaks and proper high pressure pump operation.
High Pressure Pump Repair:
Parts (TM 10-4610-309-24P):
Thrust Bearing
Piston Cluster
Piston Set
Disc Valve Set
Materials:
Corrosion preventive compound (WP 0079, Table 1, item 17)
Glycerin (WP 0079, Table 1, item 21)
Clean, dry, lint free rags (WP 0079, Table 1, item 33)
Tools:
Cylinder liner removal tool, FMC P502704
Bearing removal/installation tool, FMC P502677
Torque wrench
Rubber or plastic faced hammer
When an internal malfunction occurs with the high pressure pump, it should be disassembled and all
internal parts inspected and replaced as required. The parts kit used for the 2000 hour PMCS contains
most parts required to repair the pump with the exception of the bearings and section assemblies.
NOTE
Rinse all parts with fresh water as they are removed. Do not scratch or soil any
bearing surfaces, metal or plastic. To simplify your work, keep the pump mounted
on 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.
Remove and disassemble the pump 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.
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