Wood’s Powr-Grip MT10HV11FDCO - Manual (Page 13)

Rev 19.0/1-13 11 MT-HV11FDCO: #35093
3) After the vacuum pumps stop running, place the power switch in the OFF ( ) position.
4) Raise the load a minimal distance, to assure that it is supported by the lifter.
5) Monitor the vacuum gauge while the load is suspended for 5 minutes:
The lifter must
maintain a minimum vacuum level of 10" Hg [-34 kPa] during this time. If not, the
load does not possess the characteristics required for using this lifter. 9
T
O
L
IFT AND
M
OVE THE
L
OAD
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 possible 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 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 pumps run at
intervals of ten 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
inspection and maintenance as needed to identify and correct any deficiency before resuming
normal operation of the lifter.
9
Certain load materials are too rough or porous to allow the lifter to form a seal which can be maintained for 5 minutes without
power. However, in geographical locations where CE Standards do not apply, it may be possible to use the lifter to lift such loads.
Contact Wood’s Powr-Grip for more information.