WPG MRPTHD1211LAC, Operating Instructions Manual

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Rev 1.0/2-21 MRPTHD-AC: #35066 29
MAINTENANCE
Note: Refer to SERVICE MANUAL #35277 when applicable.
V
ACUUM
P
AD
M
AINTENANCE
Pad-to-Load Friction Coefficient
The friction coefficient represents the lifter's ability to resist load slippage. The Maximum
Load Capacity is based on a friction coefficient of 1, as determined by testing of clean,
new, standard rubber vacuum pads on clean, dry, regular glass.
If the lifter is used under any
other conditions, a qualified person must first determine the effective lifting capacity.
1
Long-term exposure to heat, chemicals or UV light can reduce the friction coefficient of vacuum
pads. Replace pads every 2 years or more often when necessary.
Pad Inspection
1A
Inspect each vacuum pad (fig. 1A) according to
the and correct the following faults before
using the lifter (see “REPLACEMENT PARTS”,
when applicable):
• Contaminates on the face (item 1 in fig.
1A) or sealing edges (item 2 in fig. 1A).
• Filter screen (item 3 in fig. 1A) missing
from face.
• Nicks, cuts, deformation or abrasions in
sealing edges.
Replace any pad that has
damaged sealing edges.
• Wear, stiffness or glaze.
1..... A “qualified person” has successfully demonstrated the ability to solve problems relating to the subject matter and work, either by possessing a
recognized degree in an applicable field or a certificate of professional standing, or by possessing extensive knowledge, training and experience.