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16—ENG
SERVICE INSTRUCTIONS
Adjusting Belt Tension
Adjust belt tension as described below.
For compressors with a motor slide mount, adjust belt
tension as follows:
1. Slide motor away from compressor until desired
tension is obtained.
On two stage compressors, the belt should deflect
1/2" at midway between the pulley and the flywheel.
2. Tighten two outside cap screws enough to hold the
motor in place for checking pulley and flywheel
alignment.
3. Tighten all four mounting screws to 20-25 ft.-lbs.
Motor Pulley and Flywheel
Alignment
1. Remove outer beltguard - To remove, loosen and
remove beltguard screws located at top of beltguard.
Insert a flat bladed screwdriver and pry beltguard apart.
2. Place a straight edge along the outside face of the
compressor flywheel to check alignment of V-belt
grooves. (See figure below for proper alignment.)
3. If the belt grooves aren't aligned, continue with step 4
of this procedure. If the belt grooves are aligned,
continue with step 6 of this procedure.
4. Loosen pulley set screw and adjust pulley until it is in
proper alignment.
5. Tighten pulley set screw to 145-165 in.-lbs.
6. Reinstall belt guard.