The minimum size of the shim that contacts the
leveler frame (i.e., the top shim of each shim stack)
must be at least 4-1/2 x 4-1/2 in. (114.3 x 114.3
mm) to support the full width of the frame rail and to
provide a shelf for a fillet weld.
Use the thickest shim stock possible for stability
and weld penetration purposes. DO NOT use
multiple layers of 1/8 in. (3.18 mm) or thinner shim
stock.
13
Manual No. 4111-0019
May 2015
July 2016
INSTALLATION
NOTE: McGuire dock levelers are designed with a
nominal 1/2 in. (12.7 mm) shimming distance
to allow for pit inconsistencies.
1. Determine height of shim stack (K) for each shim
location (B) by performing the following:
a. Measure leveler frame height distance (A).
b. Measure dock floor-to-pit floor distance (H)
at each shim location (B). Write down the
dimensions obtained at each location.
c. Subtract distance (A) from distance (H) to obtain
the shim height. Repeat for each shim location.
5. Using an appropriate lifting device connected to the
lifting brackets, lower dock leveler into the pit so
rear hinge frame angle (G) is tight against rear pit
curb angle (E) across full width of the leveler frame.
6. Allow rear of dock leveler to rest on the rear shims
while keeping the front of the dock leveler level with
the dock floor.
7. Add shims at front shim locations (C) so front of
dock leveler will stay level with dock floor when
leveler is resting fully on shims.
4. Put a 1/4 in. (6.6 mm) thick shim at locations (C)
(under lip keepers/maintenance prop and safety
legs). Make sure shims are larger than frame front
flat so pyramid or stepped stacking method can be
used.
NOTE: A 1/4 in. (6.6 mm) thick shim at locations (C)
is used only as a starting point. The final shim
stack height will be determined after the dock
leveler is lowered into the pit.
2. Using the results obtained in step 1, create the
individual shim stacks on the pit floor at locations
(B). Build each shim stack (K) using the pyramid
method (M) (preferred) or stepped method (N) with
the top shim having a minimum size of 4-1/2 x 4-1/2
in. (114.3 x 114.3 mm) and each successive lower
shim being larger so the shims can be welded
together using a fillet weld. DO NOT use offset
method (P) or straight method (Q).
NOTE: To assist in obtaining an accurate measurement
of distance (J), use a string (F) pulled tight
across the pit opening, directly over the shim
locations.
3. Verify that each shim stack is at the correct height
by measuring distance (J) [top of shim stack (K)
to dock floor]. Distance (J) must equal the dock
leveler height (A).
The dock leveler is heavy. Use a lifting device and
chains with the appropriate lifting capacity and
reach.
Always use the lifting brackets provided with the
unit whenever lowering or lifting a dock leveler into
or out of a pit.
Failure to follow these instructions could result in
death or serious injury.
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