26
ADJUSTMENTS
Drive Chain & Brake Torque Adjustments
Brake Torque Adjustment
If the hook is dropping from the engaged to stored
position with very little effort, or seems like it is binding
and takes an unusually high amount of effort, a brake
torque adjustment may be required.
Verify brake torque is greater than 42 ft-lbs and less
than 58 ft-lbs at the hook shaft, while rotating the
hook from ENGAGED (45 deg) to STORED (see
Figures 19 and 20):
1. Loosen brake adjuster locknut while holding the
adjuster screw to prevent inadvertent adjustment.
2. Turn adjuster screw clockwise to increase brake
torque as needed.
3. Tighten adjuster locknut while holding the adjuster
screw to prevent inadvertent adjustment.
4. Verify brake torque is greater than 42 ft-lbs and
less than 58 ft-lbs at the hook shaft, while rotating
the hook from ENGAGED (45 deg) to STORED;
readjust as required.
Drive Chain Adjustment
Inspect the drive chain periodically for dirt and chain
slack. Open the motor enclosure and clean the chain
with solvent. After cleaning, spray with a high quality
chain spray type lubricant.
The drive chain should not have more than 1/4” slack
(see Figures 19 and 20). To tighten chain:
1. Open motor enclosure and loosen the four (4)
motor mounting bolts.
2. Pry the motor assembly forward, in the slotted
holes, until the chain is tight with proper alignment
between sprockets.
3. Hold in this position and tighten the four (4) motor
mounting bolts to 96 in-lbs in 10 in-lb increments.
It is recommended and good safety practice to use
an additional means to support the dock platform
and lip anytime when physically working in front of
or under the dock leveler. This additional means
may include, but is not limited to a boom truck, fork
truck, stabilizing bar or equivalent.
Always post safety warnings and barricade the
work area at dock level and ground level to prevent
unauthorized use of the dock leveler before
maintenance is complete.
A hard hat or other applicable head protection
should always be worn when working under or
around a dock leveler.
Always stand clear of platform lip when working in
front of the dock leveler.
4111-0072 — Dec. 2018
© 2018 Systems, LLC
