ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0056 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
AIR COMPRESSOR
Sight along the compressor sheave to the motor sheave to determine if they are in line with each other. If
they are not, adjust the compressor and motor sheave alignment as follows (see Figure 15):
1. Make sure that electrical power to the TWPS has been shut off.
2. Loosen the four drive-motor mounting nuts.
3. Turn the belt adjustment bolt counterclockwise to loosen the belt.
4. Loosen the drive motor base bolts.
5. Measure from the edge of the mounting plate to the edge of the drive motor base at both ends of
the same side.
6. Set the drive motor base for 2 inches on both side of the base. Then tighten the bolts slightly.
7. 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.
8. 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.
9. Repeat steps d and e as needed to ensure alignment.
10. Tighten the drive motor base bolts.
Adjust the air compressor drive belt tension as follows (see Figure 15):
1. Make sure that electrical power to the TWPS has been shut off.
2. Loosen the four drive-motor mounting nuts if not already loosened to adjust sheave alignment.
3. Reach in behind the belt guard assembly and push down hard in the center of the belt with your
thumb to check the belt tension. The belt should deflect about -in.
4. Turn the belt adjustment bolt clockwise to tighten the belt or counterclockwise to loosen the belt
until the belt has about -in. deflection when pushed down with your thumb.
5. Tighten the four drive-motor mounting nuts.
6. Check that the air compressor and drive motor sheaves are secure.
7. Remove any debris from the front area of the motor and compressor.
8. Start the compressor and check for proper operation.
DRIVE BELT
DRIVE MOTOR
DRIVE MOTOR
MOUNTING NUT
EDGE OF MOUNTING PLATE
SHEAVES
EDGE OF DRIVE MOTOR BASE
DRIVE MOTOR BASE BOLT
BELT ADJUSTMENT BOLT
Figure 15. Compressor Belt Tension Adjustment.
0056 00-23
