beautypg.com

Reading the vacuum gauge, Vacuum level on optimal surfaces, Vacuum level on other surfaces – Wood’s Powr-Grip MT5HV11AC User Manual

Page 13

background image

Rev 19.0/1-14

11

MT5HV11AC: #35086

Reading the Vacuum Gauge

The vacuum gauge indicates the current vacuum level in the lifter’s vacuum system. 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. The lifter's Load Capacity is rated at a vacuum level of 17½" Hg [-59 kPa]
(see SPECIFICATIONS).

Vacuum Level on Optimal Surfaces

When the lifter is attached to clean, smooth, nonporous load surfaces, it should be able to attain

a vacuum level of 17½" Hg [-59 kPa] or more, 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

attain 17½" Hg [-59 kPa], 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 17½" Hg [-59 kPa] on the vacuum gauge (see T

O

L

IFT

AND

M

OVE THE

L

OAD

: Load Capacity and the Vacuum Gauge to follow), 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.

6

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.