Wood’s Powr-Grip MTA2HV11AIR - Manual (Page 11)

Rev 10.0/12-12 9 MTA2-AIR: #35100
Vacuum Level on Optimal Surfaces
When the lifter is attached to clean, smooth, nonporous load surfaces, it should be able to
maintain a vacuum level in the green range on the vacuum gauge, except when used at high
elevations (see SPECIFICATIONS: Operating Elevation). If not, perform the V
ACUUM
T
EST
(see
MAINTENANCE) to determine whether there is a deficiency in the vacuum generating system.
Vacuum Level on Other Surfaces
When the lifter is attached to contaminated, rough or porous load surfaces, it may not be able to
maintain a vacuum level in the green range on the vacuum gauge, due to leakage in the seal
between the vacuum pads and the load surface. In the case of contamination, thoroughly clean
the contact surfaces of the load and the vacuum pads (see MAINTENANCE: V
ACUUM
P
AD
M
AINTENANCE
: Cleaning), and reapply the lifter to the load. If the load has rough or porous
surfaces, the operator must conduct a test to determine whether the lifter is designed
to lift the load , as follows:
1) Make sure the lifter's vacuum generating system is functioning correctly (see MAINTENANCE:
V
ACUUM
T
EST
).
2) Apply the vacuum pads to the load as previously directed.
3) When the vacuum level registers above 16" Hg [-54 kPa] on the vacuum gauge (see T
O
L
IFT
AND
M
OVE THE
L
OAD
: Load Capacity and the Vacuum Gauge to follow), move the slide on the air
supply valve to 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. 6
T
O
L
IFT AND
M
OVE THE
L
OAD
About the Tilt Linkage
WARNING: Make sure load is positioned correctly on lifter; unbalanced loads
may tilt unexpectedly.
The lifter’s tilt linkage is designed to automatically hold a balanced load in either the upright or
the flat position. However, an unbalanced load may tilt unexpectedly from the flat position to the
upright position or vice versa, when lifted. This could result in load damage or injury to anyone
positioned in the tilt path of the load. To minimize the potential for these problems, make certain
prior to lifting any load that it has allowable characteristics (see INTENDED USE: L
OAD
C
HARACTERISTICS
) and is attached correctly to the lifter (see T
O
A
PPLY THE
P
ADS TO A
L
OAD
preceding).
6
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.