Wood’s Powr-Grip MR411LAC - Manual (Page 8)

Rev 22.0/12-13 6 MR4-AC: #35051
ASSEMBLY
1) Open the shipping container and remove all materials for restraining or protecting the vacuum
lifter. Save the container for use whenever the lifter is transported.
2) Position the lifter's lift spool as follows: The lift spool assembly is adjustable to provide 2
different lift points, in order to optimize the lifter's hang angle for its intended use. A
different hang angle may be desirable, depending on the angle needed to attach the lifter to
the load, release the load or manipulate the load during a lift.
In general, moving the lift spool
forward (away from operator position) helps to keep the
hang angle vertical while the lifter is loaded ; however, while unloaded, the lifter tends to hang
away from the operator position. Conversely, moving the lift spool rearward (towards
operator position) helps to keep the hang angle vertical while the lifter is unloaded ; however,
while loaded, the lifter tends to hang closer to the operator position.
To change the lift spool position, remove the retaining bolt (ie, lowermost bolt when lift bar is
oriented vertically) and, if necessary, loosen the pivot bolt (ie, bolt immediately above
retaining bolt). Next pivot the lift spool assembly forward or rearward until the bolt holes
align for the second spool position. Then reinstall the retaining bolt and tighten both bolts
securely.
3) Suspend the lifter from a crane as follows: Select hoisting equipment (crane and hoist, when
applicable) rated to carry the maximum load weight plus the lifter weight (see
SPECIFICATIONS: Maximum Load Capacity and Lifter Weight).
Note: Any application of the lifter must conform to all statutory or regulatory standards that
relate to the hoisting equipment when used in its geographical location (eg, relevant OSHA
standards in the USA).
WARNING: Hoisting equipment hook must be fitted with restraining latch to
prevent lift spool from slipping off under any circumstances.
Tilt the lifter upward until the pad frame is in a vertical orientation, resting on the integrated
parking feet. Then attach the hoisting equipment hook to the lift spool.
Note: Some hoisting equipment hooks could interfere with an upright load that extends
beyond the lifter's pad frame. If the load would contact the hook during lifter operation, the
operator must prevent this by attaching a sling (or other rigging that does not interfere with
the load) between the hook and the lift spool.
WARNING: Any sling used must be rated to carry maximum load weight plus
lifter weight.
Use the hoisting equipment to raise the lifter out of the shipping container, being careful to
avoid damaging any vacuum pads. Remove the pad covers and save them for use whenever
the lifter is stored.