Wood’s Powr-Grip MRTA811LDCO - Manual (Page 29)

Rev 0.0/6-14 27 MRTA8-DCO-DVS: #35077
4) Repeat steps #1-3 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.
Release Function Test
The Dual Vacuum System employs an adjustable relief valve, in order to actuate the pressurized
release function. This relief valve has been set at the factory and normally does not need to be
adjusted. However, the release function should be tested each time the preceding V
ACUUM
T
EST
is performed, to make sure that the release mechanism is working correctly. Release the test
material as previously directed (see OPERATION: To Release the Pads from the Load) and
monitor the release mechanism for the following symptoms:
• The vacuum pads release for only one circuit of the vacuum system (ie, only 1 of the 2 small
vacuum gauges shows a decrease in vacuum).
• The vacuum pads release very slowly (ie, requiring more than 2 seconds per each pad in use).
• The lifter does not release at all (ie, both small vacuum gauges show full vacuum).
If any of these conditions is observed during release, the release mechanism is not functioning
correctly. Correct any deficiency before using the lifter. Contact Wood’s Powr-Grip or an
authorized dealer for assistance.