Wood’s Powr-Grip VLPL411LAC - Manual (Page 12)

Rev 15.0/12-12 10 VLPL4-AC: #35165
T
O
L
IFT AND
M
OVE THE
L
OAD
WARNING: Never attempt to lift load when lifter is in horizontal
orientation.
Load Capacity and the Lift Lights
A lifter's Load Capacity is rated at a vacuum level of 16" Hg [-54 kPa] (see SPECIFICATIONS).
After the lifter has attained this level, the green vacuum lift lights turn on to indicate that the
lifter is ready to lift the maximum load weight.
WARNING: Never attempt to lift load unless green lights are illuminated.
Do not attempt to lift the load unless the lift lights are illuminated; such an attempt could result
in a load release and possible injury to the operator.
Monitoring Vacuum Indicators
The vacuum lift lights and the vacuum gauge must remain completely visible to the operator, so
that they can be monitored throughout the entire lift.
WARNING: Vacuum indicators must be visible to operator throughout entire lift.
The lifter’s vacuum pump runs continuously to maintain sufficient vacuum for lifting the
maximum load weight. If the vacuum system experiences leakage while the lifter is attached to
the load, the lift lights turn off automatically, to signal the reduction in vacuum to the operator.
If the lift lights turn off while you are lifting a load, make sure the vacuum gauge shows a
vacuum level of 16" Hg [-54 kPa] or higher. If not, move away and stay clear of the load until it
can be lowered to the ground or a stable support.
WARNING: Stay clear of any suspended load while vacuum level is lower than
16" Hg [-54 kPa].
Discontinue lifter use until the cause of the vacuum loss can be determined. If the lift lights do
not turn on when the lifter is attached to clean, smooth, nonporous materials, the leakage is
likely to be in the vacuum system. In this event, perform the V
ACUUM
T
EST
(see MAINTENANCE)
and inspect the vacuum pads for damage (see MAINTENANCE: V
ACUUM
P
AD
M
AINTENANCE
:
Inspection). If the vacuum loss cannot be remedied immediately, perform inspection and
maintenance as needed to identify and correct any deficiency before resuming normal operation
of the lifter.
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 crane.
WARNING: Never allow any pad shutoff to be opened or closed while lifting.
Opening or closing a pad shutoff while the lifter is supporting a load could result in the release of
the load and possible injury to the operator or others. The operator must take all appropriate
measures to prevent any person or object from accidentally moving the lever of a pad shutoff
during the lift.