Poweramp AP SERIES AIR POWERED - Manual (Page 14)

12 4111-0009 — Aug 2012
Jan 2013
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 (L) for each shim
location (B) by performing the following:
a. Measure leveler frame height distance (A).
b. Measure dock floor-to-pit floor distance (J)
at each shim location (B). Write down the
dimensions obtained at each location.
c. Subtract distance (A) from distance (J) 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 (H) is tight against rear
pit curb angle (F) 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. For all AP models, add shims at front shim
locations (C and D) so front of dock leveler will
stay level with dock floor when leveler is resting
fully on shims.
4. For all AP models, put a 1/4 in. (6.6 mm) thick shim
at locations (C and D).
NOTE: A 1/4 in. (6.6 mm) thick shim at locations (C
and D) is used only as a starting point. The final shim
stack height will be determined after 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 (L) using the pyramid
method (N) (preferred) or stepped method (P) 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 (Q) or straight method (R).
NOTE: To assist in obtaining an accurate measurement
of distance (K), use a string (G) 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 (K) [top of shim stack (L)
to dock floor]. Distance (K) must equal the dock
leveler height (A).
INSTALLATION
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.
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 hoist cylinder / storage
prop weldment.
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.