Pre-Load Range; Adjustment Nut; To Remove Pre-Load Range - Kurt DL640 Installation & Operation Manual

Pre-Load rangeAdjustment Nut
Refer to sketch below for direction of adjustment
To remove Pre-Load range (Reducing the amount of turns of the handle
when clamping or unclamping parts).
1. Loosen but do not remove the (socket head set screw) on top of Holding
Block.
2. With the use of a spanner wrench, begin to turn the Adjustment Nut
clockwise. Each full turn will reduce Pre-Load amount by appoximitly
.04. NOTE: Maximum reduction is .100/.150 or approximately 3-3/4
turns of the Nut. NOTE: If adjustment Nut turns to a complete stop
before the 3-3/4 turns, maximum reduction range is complete.
3. Turn counterclockwise Aligning the first slot on the Adjustment Nut with
the SHSS and tighten.
To add Pre-Load range (Increase the amount of turns of the handle)
1. Loosen but do not remove the SHSS on top of the Holding Block.
2. With a spanner wrench turn the adjustment nut counter clockwise until
threads on the Adjustment Nut begin to show.
3. Align the slot on the Adjustment Nut with the SHSS and tighten.
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