Wood’s Powr-Grip VL411LDC - Manual (Page 20)

Rev 17.0/12-12 18 VL411LDC: #35162
V
ACUUM
T
EST
Test the vacuum system for leakage routinely, as directed in the preceding I
NSPECTION
and
T
ESTING
S
CHEDULES
.
1) Clean the face of each vacuum pad as previously directed (see V
ACUUM
P
AD
M
AINTENANCE
:
Cleaning).
2) Apply the lifter to a clean, smooth, nonporous surface. The surface should be flat or possess
no more curvature than the lifter is designed for (if any). 10 When the pumping cycle is
completed, the vacuum level should register above 16" Hg [-54 kPa] on the vacuum gauge (if
not, see V
ACUUM
S
WITCH
A
DJUSTMENT
to follow).
3) After the vacuum pump stops running, leave the pads attached to the surface and interrupt
the energy flow from the battery: Disconnect the electrical connector uniting the battery to
the vacuum generating system.
Note: After the vacuum test is completed, move the valve handle to the “RELEASE” position
(power off ) before reconnecting the battery.
4) Monitor the vacuum gauge: The vacuum level should not decrease by more than 4" Hg [-14
kPa] in 10 minutes.
WARNING: If lifter fails vacuum test, discontinue use immediately.
Correct any deficiency in the vacuum system before using the lifter. Contact Wood’s Powr-Grip
or an authorized dealer for assistance.
10
Any test material used must be fully and independently supported, and capable of bearing the lifter’s weight. Do not use
the lifter to lift the test material during the vacuum test.