Wood’s Powr-Grip VLGG1011LAC - Manual (Page 12)

Rev 22.0/9-13 10 VLGG-AC: #35163
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 pads near the top edge. This position will
maximize stability while lifting the load. Make sure that all vacuum pads will fit entirely on the
load’s contact surface (see SPECIFICATIONS: Maximum 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.
WARNING: Do not disconnect control pendant during lifter operation.
The movable control pendant is not intended to be disconnected during lifter operation.
Disconnecting the control pendant is likely to result in a load release and injury to the operator or
others nearby.
Reading the Vacuum Gauge
The vacuum gauge indicates the current vacuum level in the lifter’s vacuum system. The green
range indicates vacuum levels sufficient for lifting the maximum load weight, whereas the red
range indicates vacuum levels that are not sufficient for lifting the maximum load weight. The
gauge needle should show a sudden surge in vacuum as the vacuum pads seal against the load.
If it takes more than 5 seconds for the vacuum level to reach 5" Hg [-17 kPa], press on any pad
that has not yet sealed.
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).