ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
DIESEL ENGINE AND FUEL TANK ASSEMBLY
b. Clean the bore and mounting faces of the adapter.
c. Lubricate the new seal seat with glycerin.
d. Insert the beveled end of the seal seat into the adapter bore and press it in until it is
e. Attach the adapter to the engine using 4 bolts, 4 flat washers, and 4 lock washers.
f. Insert the new drive sleeve into the impeller from the flat side and secure it with the
g. Lubricate the inner diameter of the new seal assembly with glycerin. With the rubber
boot end toward the impeller, twist and slide the seal assembly onto the drive sleeve.
h. Lubricate the engine drive shaft and the inside diameter of the new drive sleeve with
corrosion preventive compound.
Improper assembly can cause damage to the drive sleeve and engine drive shaft.
Do NOT place a key between the drive shaft and drive sleeve. Do NOT force the
sleeve onto the shaft. Failure to observe this caution can make impeller clearance
adjustments and future removal of the drive sleeve difficult, and may cause
damage to the drive sleeve and/or engine drive shaft.
If the drive sleeve does not easily slide onto the shaft, it may be necessary to
remove burrs from the shaft.
Slide the impeller and drive sleeve assembly onto the engine drive shaft.
Place a new housing gasket between the adapter and the pump housing.
Fit the pump onto the adapter and thread a nut on two opposing threaded studs to secure
the pump to the adapter. Tighten the two nuts.
5. Set the gap between the impeller and the pump wear plate as follows (see Figure 6):
a. Remove the four cap screws and four lock washers that secure the outlet flange to the
b. Carefully remove the pump flange to avoid damaging the gasket between the flange and
the pump housing.
c. If the gasket is damaged, replace it.
d. Look through the outlet into the pump. Turn the impeller drive sleeve and impeller by
hand until you see the impeller near the wear plate.
e. Insert a 0.015 inch feeler gauge between the impeller and wear plate. Move the
impeller forward or backward as needed to provide a gap of 0.015 to 0.017-inch.
f. Make sure the coupling clamp set screw, a drive sleeve slat, and the motor shaft keyway
g. Tighten the coupling clamp assembly to secure the impeller drive sleeve to the engine
New engines are shipped without lubricating oil. Add oil to the engine before
operating it or equipment damage will result.