Wood’s Powr-Grip VLPL411LAC - Manual (Page 10)

Rev 15.0/12-12 8 VLPL4-AC: #35165
WARNING: Closing any pad shutoff reduces lifting capacity.
To activate a pad, open the pad shutoff (place valve lever parallel with
vacuum line); to deactivate a pad, close the pad shutoff (place valve lever
perpendicular to vacuum line). To calculate the lifting capacity when any
pads are deactivated, consult the Per-Pad Load Capacity rating (see
SPECIFICATIONS) and multiply by the number of pads currently
activated. Always activate pads in a symmetrical configuration, to keep
the lifter balanced while lifting, and use as many pads as possible for
each load being lifted, to maximize lifting capacity and to minimize load
overhang.
T
O
A
PPLY THE
P
ADS TO A
L
OAD
Generating Vacuum Flow
Place the power switch in the "ON" position. This engages the vacuum pump, causing air to be
drawn immediately at the vacuum pads. 4
WARNING: Never turn power off during operation; keep pump running
throughout lift.
The lifter is designed for the vacuum pump to run continuously. Placing the power switch in the
"OFF" position during lifter operation could result in the release of the load and possible injury to
the operator (see T
O
L
IFT AND
M
OVE THE
L
OAD
: In Case of Power Failure to follow).
Positioning the Lifter on the Load
Make certain that the contact surfaces of the load and all vacuum pads are free of any
contaminates that could prevent the pads from sealing against the load (see MAINTENANCE:
V
ACUUM
P
AD
M
AINTENANCE
).
The lifter must be attached only to vertically oriented loads. Center the pad frame from left to
right on the load, and position the uppermost activated pads near the top edge. This position
will maximize stability while lifting the load. Make sure that all activated vacuum pads will fit
entirely on the load’s contact surface (see SPECIFICATIONS: Pad Spread) and that they will be
loaded evenly while lifting (see SPECIFICATIONS: Per-Pad Load Capacity). Then apply the lifter
to the load until the pads seal against the contact surface.
Note: If a vacuum pad has been lying against a hard object (as during shipping), it may be
slightly distorted. Although initially it may be difficult to apply the pad to a load, this condition
should correct itself with continued use.
4
If the vacuum pump or any other powered component fails to function while the power switch is in the "ON" position, make
sure the lifter is connected correctly to an appropriate power source, as directed in the ASSEMBLY section. If so, examine each
circuit breaker (adjacent to power switch) to determine whether it has interrupted the electrical circuit to the component.
Although the operator can reset the circuit breaker, the power interruption may indicate an electrical problem that requires
attention. Correct any deficiency before resuming normal operation of the lifter (see wiring diagram provided).
CLOSED
PAD SHUTOFF VALVE