C. LOCK HANDLE
The lock handle (#2) actuates and holds the clamp- ing jaws when in the engaged (down) position and releases the jaws in the up position. This handle is already adjusted for use out of the box. However, further adjustment may be necessary after a short
Step 1.
Push down on handle. Very little effort is required to do this
Step 2.
Check the position of the power link (#5). Figure
11.Notice how the link “cams over” slightly past horizontal when the handle is engaged. The power link should be adjusted to “cam over” at approxi- mately five degrees past horizontal.
Setscrew stop
Check nut
Figure 12. Setscrew stop.
Power link
5˚
Figure 11. Adjusting the power link.
Step 3.
Slide the vinyl grip (#1) back about half way to expose the setscrew stop (#28) located on the underside of the draw bar (#6). Figure 12. The setscrew stop limits the degree of handle throw.
Step 4.
Bump the handle from underneath. If the handle can be unlocked by bumping it 3 or 4 times, the setscrew stop needs to be backed off. If the set- screw stop is backed out too far, the power link will pivot past five degrees and the clamping force will diminish.
Step 5.
Loosen the check nut (#29) with a 7⁄16" socket. Adjust the setscrew stop using a 3mm Allen wrench until the the power link is 5˚ past hori- zontal. Test your results. If you can bump the handle and it releases, incrementally back out the setscrew stop some more. If the draw bar can be observed stopping its outward motion and then begins to reverse direction, turn the setscrew stop back in.
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