OPERATING
BETTCHER
AIRSHIRZ
®
INSTRUCTIONS
INDUSTRIES, INC. Rev. September 24, 2016
Page 40
9.2.1
Finger Loop Post Screw Setting (Continued)
With your hand off the finger loop, slowly loosen the screw (counterclock-wise) until
the finger loop
just opens freely
. There should be a slight bounce or "clunk" when the
finger loop hits the stop. Test the finger loop action a few times and readjust the post
screw slightly as needed. Then loosen the screw an additional 22° (approximately)
using Figure #28 below as a guide.
FIGURE #28
Connect the master link (Reference Section 9.4.8)
Install the cover. (Reference Section 9.4.2)
9.2.2
Smoothness Adjustment
The inner workings of the control valve are set precisely to respond quickly to
commands from the finger loop. They may need to be readjusted after a long period of
use, or after removing the rear fitting assembly.
Disconnect the air line.
Remove the blade set. (Reference Section 8.3.2).
Connect the air line and disengage the blade latch.
Loosen the locknut for the rear fitting, located at the rear of the valve body, one full
turn.
While operating the finger loop full travel open and closed, use a 5/16 inch open-end
wrench to rotate the square part on the rear fitting, counterclockwise, until operation
feels rough. If you have been doing the stroke adjustment, be sure the control valve
lock nut at the front of the valve is tight. Otherwise the whole valve body may rotate.