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OPERATING
BETTCHER
AIRSHIRZ
®
INSTRUCTIONS
INDUSTRIES, INC. Rev. September 24, 2016
Page 62
9.4.12
Drive Link Installation
Disconnect the air line.
Clean area around flange bearings and drive roller.
Inspect clevis pin and pivot pin for dirt or excessive wear. Replace if worn. The pivot bushings
should always be replaced when replacing the pivot pin.
To Replace The Pivot Bushings : Push out the old
bushings. Align both new bushings and press them
in part way by hand. Hold the drive link in a vise
such that the flanges of the bushings contact the jaws
of the vise. Tighten the vise until the flanges are
flush against the surfaces of the drive link.
Inspect the drive roller. You should be able to rotate the drive roller by hand and should not have
more than .004 inch (.1 mm) radial play or more than .008 inch (.2 mm) axial play.
Inspect roller sleeve for cracks, deep grooves or heavy pitting.
If any other areas of the drive link are worn or damaged, the drive link should be replaced as a
unit. Always use a new clevis screw with a new drive link.
Grasp the drive link at the clevis end with the roller facing downward to the right. With the frame
in the other hand, and the power cylinder swung outward, slide the drive link under the servo
linkage such that the pin on the drive link enters the slot from its underside. Push the drive link
into the pocket of the frame, while rotating it into alignment. (See Figure #59 above).
Turn the AirShirz
®
over so the threaded side of the drive link clevis is facing up. Position the
clevis hole over the hole in the power cylinder rod and insert clevis pin. Wiggle the clevis while
pushing on the pin until it slides in past the threads. Install the pin retaining screw and tighten
firmly.
Align the flange bearings of the drive link with the pivot hole in the frame and insert the pivot pin
with the large end facing out. (See Figure #56).
Roller
Drive Pin
Drive Link
Pivot Bushing