Rev 3.0/10-06
QUADRA-TILT ROTATOR • DC-VOLTAGE
Page 11
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 rotate or tilt unexpectedly (see T
O
L
IFT AND
M
OVE
THE
L
OAD
: About the Tilt Linkage to follow), and it may also damage the lifter.
5
Make sure that all
vacuum pads will fit entirely on the load’s contact surface (see SPECIFICATIONS: Pad Spread)
and that they will be loaded evenly while lifting (see SPECIFICATIONS: Per-Pad Load Capacity).
Then apply the lifter to the load so that all pads are touching the contact surface.
Sealing the Pads against the Load
Firm pressure at the center of the lifter helps the
vacuum pads begin to seal against the load. Pull the
valve handle outward to the “APPLY” position (power
on). This energizes the vacuum pump, causing
vacuum to be drawn at the pads immediately. The red
low vacuum warning light also turns on and remains
illuminated until the lifter attains sufficient vacuum to lift the
maximum load weight (see T
O
L
IFT AND
M
OVE THE
L
OAD
: Load Capacity and the Warning Light to
follow). The valve handle must remain in the “APPLY” position throughout the entire lift.
WARNING: Keep valve handle 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.
Reading the Vacuum Gauges
The lifter is equipped with 2 vacuum gauges, which indicate the current vacuum level in each
circuit of 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. Both gauge needles 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] on either vacuum gauge, press on any pad that has not
yet sealed.
5
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.
TO APPLY
