Wood’s Powr-Grip MT89AC - Manual (Page 15)

Rev 14.0/6-14 13 MT89AC: #35088
Controlling the Lifter and Load
When the vacuum indicators show that the lifter is ready, use the hoisting equipment to raise the
lifter and load as needed to clear any obstacles in their path. Use the control handles to keep the
lifter and load in the desired orientation while they are suspended from the hoisting equipment.
Once sufficient clearance is established, the load can be tilted as desired (see T
O
T
ILT THE
L
OAD
to
follow).
In Case of Power Failure
The lifter is equipped with a vacuum reserve tank, designed to maintain vacuum temporarily in
case of a power failure.
WARNING: Stay clear of any suspended load in the event of a power failure.
Although the lifter is designed to support the load for at least 5 minutes without power, this
depends on many factors, including the condition of the load and the lifter’s vacuum system (see
INTENDED USE: L
OAD
C
HARACTERISTICS
and MAINTENANCE: V
ACUUM
P
AD
M
AINTENANCE
, V
ACUUM
T
EST
). If a power failure occurs, keep all personnel clear of the suspended load until it can safely
be placed on the ground or a stable support. Correct any deficiency before resuming normal
operation of the lifter.
T
O
T
ILT THE
L
OAD
WARNING: Make sure load is positioned correctly on lifter (see T
O
A
PPLY
);
unbalanced loads may tilt unexpectedly when latch is disengaged.
Remember that the load requires more vertical space when tilted
to the upright position, as well as more horizontal space when
tilted to the flat position. Make sure there is sufficient clearance
for the load to tilt without contacting the operator or any nearby
objects. Maintain a firm grip on one control handle to keep the
load under control at all times. If the pad frame is latched in the
vertical position, pull the tilt release lever to disengage the tilt
latch, and prepare for a slight surge of motion as the load begins
to tilt. If load size permits, maintain control with the handle
throughout the tilt. For loads with overhang, it may be necessary
to release the control handle as the load approaches the flat position. If so, keep the load under
control using hand cups or other appropriate means. The pad frame automatically latches in
place when it returns to the vertical position.
T
O
R
ELEASE THE
P
ADS FROM THE
L
OAD
WARNING: Load must be fully supported before releasing vacuum pads.
When the load is at rest and fully supported, push the vacuum release button on the movable
control pendant to force air into the vacuum pads, quickly breaking the vacuum seal. After the
pads have disengaged completely from the load, move the lifter away. Continue to hold the
release button until the pads are well away from the load; otherwise, the lifter would reattach
itself to the load.