Woods Powr-Grip N4950 Manual To Maintenance, Troubleshooting, And Repair
THE ORIGINAL
& TRUSTED NAME
IN VACUUM LIFTING
EQUIPMENT
Guide to
Maintenance,
Troubleshooting,
and Repair
Rev. 4.0/ 10-16 Metal Troubleshooter
1MTS
Products are manufactured under an
ISO 9001 quality management system
Environmental conditions can affect product performance and longevity; consult the product instructions on
www.WPG.com or contact a Technical Sales Representative for more information.
Based on product information at time of publication.
Wood's Powr-Grip products are sold
through authorized dealers.
General Maintenance
For maximum reliability, INSPECT THE HAND CUP REGULARLY: Make sure the air filter is in
place; if not, discontinue use until the filter is replaced. Examine the plunger assembly and handle
for dents, cracks or other damage. Examine the face of the vacuum pad for excessive glaze (a
polished, glossy appearance) and for cuts or roughness on the sealing edges. Periodically test
the cup for excessive leakage, sluggishness in plunger action or radical changes in the number
of strokes needed to keep the red line hidden. If the cup does not function normally, review the
Troubleshooting Guide (overleaf) to determine what corrective action is needed.
To CLEAN THE VACUUM PAD, remove the air filter from the pad face. Use a clean sponge
or lint-free cloth to apply soapy water or another mild cleanser to the cup face. Never use
solvents or rubber conditioners as a cleaning agent (see WARNINGS). To prevent liquid
from contaminating the pump during cleaning, hold the cup face-down or cover the suction
inlet in the filter recess. For 8" [20 cm] pads, be careful not to dampen the felt strip at the pad’s
edge. Wipe all residue from the pad face and allow the cup to dry. Then reinstall the air filter.
Inspecting and Testing the Cup for Leakage
To INSPECT THE SEALING EDGES of the vacuum pad for roughness or foreign material, slowly
draw your finger along the entire length of the sealing edges. Examine the sealing edges for
cuts by bending the edge of the pad face towards you to create a hump, turning the hand cup
as necessary. If cuts or cracks are present in a sealing edge, a V-shaped gap will appear. Any
pad that exhibits a gap or excessive roughness in a sealing edge must be replaced.
To LEAK-TEST THE HAND CUP, attach it to a clean, smooth, scratch-free piece of glass or
metal for approximately 2 hours. The red line on the plunger serves as a vacuum indicator:
If the red line does not appear during the test period, the cup is usable; if the red line does
appear, perform general maintenance and repeat the test. If the problem persists, check the
Troubleshooting Guide (overleaf) to identify possible causes and appropriate corrective actions.
If these measures do not restore the cup to normal performance, contact the Wood’s Powr-Grip
Customer Service department or an authorized dealer for assistance.
N4950, N5450, N6450,
N4300*, N5300*, N6300*
N4950TS, N5450CS
METAL HANDLE
HAND CUPS
* Some details may not
apply to hand cups with
ABS plunger assemblies.
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32620
908 West Main - P.O. Box 368
Laurel, Montana 59044 U.S.A.
406.628.8231 (phone)
406.628.8354 (fax)
800.548.7341
www.WPG.com