Rev 34.7/3-20
17
MR1611LDC: #35050
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 Light
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 vacuum pumps turn off automatically, to conserve
battery energy. At the same time, the green vacuum lift light turns on, to indicate that the lifter
is ready to lift the maximum load weight.
WARNING: Never attempt to lift load unless green lift light is illuminated.
Do not attempt to lift the load unless the lift light is illuminated; such an attempt could result in a
load release and injury to the operator.
Monitoring Vacuum Indicators
The vacuum lift light 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.
If the vacuum system experiences leakage while the lifter is attached to the load, the vacuum
pumps turn
on automatically, as required to maintain sufficient vacuum for lifting the maximum
load weight. The lift light turns
off while the pumps are running, to signal the reduction in
vacuum to the operator.
If the pumps turn on and the lift light turns 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 when vacuum level is insufficient.
Discontinue lifter use until the cause of the vacuum loss can be determined. If the pumps run at
intervals of 10 minutes or less while 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
inspections and maintenance as needed to identify and correct any deficiency before resuming
normal operation of the lifter.
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