Poweramp CM SERIES MECHANICAL - Manual (Page 15)

13
4111-0006 — Sept 2010
Sept 2012
INSTALLATION
NOTE: Poweramp 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.
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).
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 angle
iron 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.
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.
IMPORTANT
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.
The dock leveler is heavy. Use chains and a lifting
device with the appropriate lifting capacity and
reach. Failure to do so may result in damage to dock
leveler and/or serious personal injury or death.