Adjusting Belt Tension
Pulley Alignment
Proper belt tension and pulley alignment must be maintained for maximum drive efficiency and for maxi-
mum belt life. The correct tensions exists if a deflection of ½ inch occurs by placing 10lbs of force midway
between the motor pulley and the compressor flywheel. This deflection can be adjusted by the following
procedure. The pulley should be carefully aligned with the flywheel and set screws should be kept tight.
1. Remove the belt guard
2. Loosen the motor mounting bolts
3. Shift the motor to the point where the correct deflection ex-
ists
4. Retighten the motor mounting belts
5. Check to ensure that the tension remain correct
after tightening
6. Re-install the belt guard. All moving parts must
be guarded
NOTE: Drive belt tension and pulley alignment are done at the
same time. They are discussed separately for clarity.
The figure to the side shows 3 examples of misaligned pulleys. To check pulley alignment, remove the belt
guard and place a straightedge against the compressor flywheel, measure and record the distance from
the straightedge to the edge of the drive belt. Then measure the distance to the edge of the drive belt on
the motor pulley at the same edge. As long as both points measure the same distance the pulleys will be
aligned if not you will need to move the pulley until its in alignment this may take a few tries. To re-align the
pulley follow the steps below
1. Loosen the motor mounting bolts
2. Remove the belt guard
3. Loosen the set screw on the motor pulley
4. Align the motor pulley with the compressor flywheel
5. Re-tighten the motor pulley set screws
6. Adjust the proper belt tension
7. Re-tighten the motor mounting bolts
8. Re-install the belt guard
Industrial Gold Air Compressors
|
800-531-9656
| www.industrialgold.com
7.5, 10, 15 HP Electric Reciprocating Compressor
