Wood’s Powr-Grip MTCL6FS625DC - Manual (Page 31)

Rev 5.0/12-13 29 MTCL6FS625DC: #35078
clinging to sealing edges. 16 Wipe all residue from the pad face, and allow the pad to dry
completely before using the lifter.
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 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). 17 When the pumping cycle is
completed, the vacuum level should register above 16" Hg [-54 kPa] on the vacuum gauges
(if not, see V
ACUUM S WITCH A DJUSTMENT to follow).
3) After the vacuum pumps stop running, leave the pads attached to the surface and place the
power switch in the OFF ( ) position, to interrupt the energy flow from the battery.
4) Monitor the vacuum gauges: The vacuum level should not decrease by more than 4" Hg [-14
kPa] in 5 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.
Dual Vacuum Circuit Test
Two vacuum system circuits allow the lifter to maintain the vacuum level in one circuit even if an
unexpected vacuum loss occurs in the other one. Verify the function of the circuits each time the
preceding V
ACUUM
T
EST
is performed and whenever a deficiency is suspected, as follows:
1) Clean the vacuum pads and apply the lifter to the test material as previously directed.
2) After the vacuum pumps stop running, monitor the vacuum gauges as a leak is introduced in
one circuit. To introduce a leak, partially disconnect or connect one of the quick connectors
until the vacuum circuit begins to leak. The corresponding vacuum gauge should indicate a
loss of vacuum in that circuit.
3) As the vacuum level decreases in one circuit, continue to monitor the vacuum gauge for the
other circuit, to make sure that it maintains its original vacuum level.
4) Repeat steps 1-3 as needed to verify the function of the second circuit of the vacuum system.
Be sure to introduce the leak at a vacuum pad belonging to the second circuit.
Correct any deficiency in the vacuum system before using the lifter. Contact Wood’s Powr-Grip
or an authorized dealer for assistance.
16
If these cleaning methods are not successful, contact Wood’s Powr-Grip or an authorized dealer for assistance.
17
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.