Poweramp CM SERIES MECHANICAL 12.2006 - Manual (Page 15)

INSTALLATION
13 4111-0006 — July 2006
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.
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
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.
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).
IMPORTANT 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.