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
Replace high pressure pump assembly P-5 or P-6 as follows:
WARNING
Electrical hazard. Army personnel: make sure that the generator is off and the
TWPS main breaker is off before working on the high-pressure pumps. Marine
Corps personnel: make sure that the TWPS is disconnected from its power source
before working on the high pressure pumps. Failure to observe this warning could
result in serious injury or death from electrical shock.
NOTE
Make sure that all items stored under HP pumps are removed.
1. Make sure that electrical power to the operator control panel has been shut down.
2. Drain the high pressure pumps and the piping to the pumps as follows (see Figure 1):
a. Open High Pressure Pump Inlet Drain Valve V-214. Close when drained.
b. Open High Pressure Pump Outlet Drain Valve V-301. Close when drained.
c. Open High Pressure Pump Case Drain Valve V-215.
d. Close all three valves when the piping and pumps finish draining.
3. Remove the high pressure pump assembly as follows (see Figure 1):
NOTE
The inner high pressure pump assembly P-6 is more easily removed if the outer
pump assembly P-5 is removed first.
a.
Tag the inlet and outlet hoses.
b.
Remove the inlet and outlet hose grooved couplings.
c.
Disconnect the drain hoses from the pump case and the pump mounting flange.
d.
Remove the lubricant return hose from the pump.
e.
Remove the terminal box cover, four caps screws, four washers, and cover gasket.
f.
Tag and disconnect the electrical wiring from the pump motor.
g.
Remove the lock nut inside the terminal box and pull the power cable and box connector
out of the box.
LUBRICANT RETURN HOSE
POWER CABLE
INLET HOSE COUPLING
MOTOR
BOX CONNECTOR
HPP P-6
HPP P-5
PUMP INLET
DRAIN VALVE V-214
PUMP OUTLET
DRAIN VALVE V-301
MOUNTING BOLT
CASE DRAIN HOSE
CASE DRAIN VALVE V-215
OUTLET HOSE COUPLING
FLANGE DRAIN HOSE
Figure 1. High Pressure Pump Assembly Removal.
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