ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
RAW WATER SYSTEM
3. Install the new adapter and pump as follows:
a. Polish the engine drive shaft with fine abrasive cloth to remove any rust or corrosion.
b. Lubricate the drive shaft and the inside diameter of the drive sleeve on the new pump
with corrosion preventive compound.
CAUTION
Improper assembly can result in damage to the drive sleeve and the engine drive
shaft. Do NOT place a key between the drive shaft and the drive sleeve. Do NOT
force the drive sleeve onto the shaft. Failure to observe this caution can make
impeller clearance adjustments and future removal of the drive sleeve difficult, and
may result in damage to the drive sleeve and/or the engine drive shaft.
Replacement pump assemblies come with a pump housing, impeller, drive sleeve
assembly, coupling clamp assembly, and adapter already assembled together. A
temporary impeller spacer is installed inside the pump between the impeller and
wear plate. Do NOT rotate the pump before removing the spacer or equipment
damage may result. Do NOT remove the spacer until the pump has been mounted
to the engine and the coupling clamp assembly has been tightened.
c. Loosen but do not remove the coupling clamp assembly on the new pump.
d. Position the replacement pump, align the coupling clamp set screw, a drive sleeve slat,
and the engine drive shaft keyway and slide the drive sleeve onto the drive shaft.
NOTE
If the sleeve does not easily slide onto the shaft, it may be necessary to remove
burrs from the shaft.
e. Attach the pump and adapter to the engine using four bolts, four lock washers, and four
flat washers.
f. Torque the coupling clamp assembly nuts to 216 in.-lbs.
g. Tighten the coupling clamp set screw into the drive shaft keyway.
h. Remove the plastic protective caps from the pump inlet and outlet openings.
i. Remove the temporary impeller spacer by pulling it out through the pump outlet opening.
4.
Remove the coupler and dust cap from the outlet connection of the old pump and install them on
the new pump. Use sealing compound on the coupler threads (WP 0079, Table 1, item 26).
5.
Remove the coupler and dust plug from the inlet connection of the old pump and install them on
the new pump. Use sealing compound on the coupler threads (WP 0079, Table 1, item 26).
6.
Remove the drain valve from the old pump. Remove the drain plug from the new pump and
install the drain valve on the new pump. Use sealing compound on the valve threads (WP 0079,
Table 1, item 26).
7.
Place the pump back into service and inspect it for leaks and proper operation.
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