ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0056 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
AIR COMPRESSOR
5. Check the compressor and motor sheave alignment and adjust if necessary as follows (see
Figure 14):
a. Loosen the drive motor base bolts.
b. Measure from the edge of the mounting plate to the edge of the drive motor base at both
ends of the same side.
c. Set the drive motor base for 2 inches on both side of the base. Then tighten the bolts
slightly.
d. Sight along the compressor sheave to the motor sheave and move the motor base
slightly as needed to bring the motor sheave in line with the compressor sheave.
e. Measure the distance to the edge of the mounting plate again at both ends. Adjust the
motor base slightly as needed to make the distance equal on both ends.
f. Repeat steps d and e as needed to ensure alignment.
g. Tighten the drive motor base bolts.
6. Install the new drive belt as follows:
a. Install the belt onto the compressor and motor sheaves.
b. Turn the belt adjustment bolt clockwise until the belt has about -in. deflection when
pushing down hard in the center of the belt with your thumb.
c. Tighten the drive motor mounting nuts.
d. Install the belt guard screen using the 15 cap screws, 15 lock washers, and 15 flat
washers.
e. Start the compressor and check for proper operation.
7. Check the belt tension after 50 hours of operation and readjust if necessary.
SERVICE
Compressor Belt Tension Adjustment:
Equipment Condition:
TWPS in Standby Shutdown Without Draining Down
Army TWPS: Generator off and TWPS main breaker off
Marine Corps TWPS: TWPS disconnected from power source
WARNING
The TWPS must be in Shutdown and the TQG and TWPS main breaker must be off
(Army) or the TWPS disconnected from its power source (Marine Corps) prior to
performing maintenance on the TWPS Air Compressor. Failure to observe this
warning can result in injury to personnel and damage to equipment.
If the compressor belt has rolled over (turned inside out, usually because of
insufficient tightness), replace the belt. Do not reuse or continue to use the belt.
Failure to observe this warning can result in the belt breaking during operation
causing equipment damage and possible injury.
0056 00-22
