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Pply the, Ads to a, Generating vacuum flow – Wood’s Powr-Grip MTA2HV11AC User Manual

Page 12: Positioning the lifter on the load, Reading the vacuum gauge

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Rev 17.0/1-14

10

MTA2-AC: #35098

T

O

A

PPLY THE

P

ADS TO A

L

OAD

Generating Vacuum Flow

Place the power switch in the “ON” position. This engages the vacuum pump, causing vacuum to

be drawn immediately at the vacuum pads.

WARNING: Never turn power off during operation; keep pump running

throughout lift.

The lifter is designed for the vacuum pump to run continuously. Placing the power switch in the

“OFF” position during lifter operation could result in the release of the load and possible injury to
the operator (see T

O

L

IFT AND

M

OVE THE

L

OAD

: In Case of Power Failure to follow).

Positioning the Lifter on the Load

Make certain that the contact surfaces of the load and both 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

L

IFT AND

M

OVE THE

L

OAD

: About the Tilt Linkage to

follow), and it may also damage the lifter.

6

Make sure that both 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 both pads seal against the contact surface. Firm pressure at the center of the pad
frame helps the pads begin to seal.
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 Gauge

The vacuum gauge indicates the current vacuum level in 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. The

gauge needle 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], press on any pad
that has not yet sealed.

6

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.