Wood’s Powr-Grip MT5HV11DC - Manual (Page 11)

Rev 7.0/12-12 9 MT5HV11DC: #35087
T
O
A
PPLY THE
P
ADS TO A
L
OAD
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
).
Center the lifter’s pad frame to within 2" [5 cm] of the load center, since off-center loading can
cause the load to tilt unexpectedly (see T O T ILT THE L OAD to follow), and it may also damage the
lifter. 4 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).
Sealing the Pads against the Load
Make sure the lever on the vacuum control valve is in
the center position (see T
O
R
ELEASE THE
P
ADS FROM THE
L
OAD
: About Energy Conservation Mode to follow).
Then pull the vacuum package valve handle outward
to the “APPLY” position, to energize the vacuum
pump and the red low vacuum warning light. 5
Apply the lifter to the load so that all vacuum pads are touching the contact surface, and move
the lever on the vacuum control valve to the “APPLY” position: Pull outward on the lever's knob,
move the lever all the way
upward and release it. This position opens the lifter’s vacuum lines to
the airflow created by the vacuum pump, causing air to be drawn immediately at the vacuum
pads.
6 Then press the lifter onto the load until the pads seal against the contact surface. Both
the vacuum package valve handle and the vacuum control valve must remain in the “APPLY”
position throughout the entire lift.
WARNING: Keep vacuum package valve handle and vacuum control valve in
“APPLY” position throughout lift.
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
The lifter is designed to handle the maximum load weight (see SPECIFICATIONS: Maximum Load Capacity) when the load’s
center of gravity is positioned within 2" [5 cm] of the pad frame’s center point. Occasional loading deviations are permissible,
provided that the operator can maintain control of the load at all times and that the load weight is low enough to avoid damaging
the lifter.
5
After the vacuum package valve handle is placed in the "APPLY" position, the low vacuum warning light and the vacuum pump
turn on until the lifter attains full vacuum. Since the lifter is operating in energy conservation mode at this stage, the pump and
warning light may subsequently turn off. However, this does not indicate that the lifter is ready to lift a load.
6
To minimize the time it takes for the lifter to attach and obtain full vacuum, do not place the valve lever in the “APPLY” position
until the vacuum pads are contacting the load.
VACUUM PACKAGE VALVE HANDLE / TO APPLY