North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com
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POSITION AND MeASURe AlIgNMeNT Of THe SHeAVe
1. Align the driveR and driveN shafts so that the faces of the sheaves are aligned and parallel to
each other. Misalignment must be LESS THAN 1/2 of 1 degree between the faces.
2. Position the sheave (driveR sheave on the PTO shaft) so it is aligned with the driveN sheave
(on equipment being driven by the PTO).
3. Calculate MAXIMUM allowable misalignment distance of the faces: Max. = 0.222 mm.
(0.00875 in.) x distance between sheave centerlines.
4. Place a tight cord or straight edge against both edges of the flat face of one sheave. Measure
the distance between the cord or straight edge and the face of the other sheave. The gap is the
misalignment distance. Align the sheaves to meet specifications.
Misalignment between the sheaves will result in shortened service life of the belts and may
result in premature equipment failure.
Figure 19. Align Sheaves to Specifications