North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com
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Figure 21. Alignment - U-Joint-Type Installation
SeTTINg UP AIR eNgAgeMeNT ON NACD POWeR TAKe OffS
1. The cylinder should be located so that the piston moves forward and backward in exactly the
same direction as the engagement lever and is aligned so it travels in exactly the same plane.
2. The air cylinder must be of sufficient size to operate the required torque to engage the clutch.
It must have some means to make adjustment on the piston stroke.
3. Air pressure must be constant. Low pressures could give only partial engagement which will
cause failures of the clutch and throwout collar.
4. The piston travel must be within limits established to both fully engage and fully disengage
the clutch. Failure to provide these parameters will cause failure and possible breakage of the
clutch.
5. The engaging cylinder must not place a pressure either in the engaged or disengaged
direction after completion of its cycle. The throwout collar must float free after engagement or
disengagement. Operating the PTO with constant pressure on the throwout collar will result in
failure.
Suggestion: A slotted connector, similar to the one illustrated below may be used.