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Guide to 

Maintenance,

Troubleshooting, 

and Repair

Rev. 0.9/ 01-17     ABS Troubleshooter  

1LTS 

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 and handle for 
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.

N4000, N4100, 

N5000, N6000, 

N4000TS, 

N5000CS, 

N6000NBP 

ABS HANDLE 

HAND CUPS

I

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900

1:2

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32621

Summary of Contents for N4000

Page 1: ...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 ToINSPECTTHESEALINGEDGESofthevacuumpadforroughness...

Page 2: ...hed Contaminated load surface Wipe surface clean If necessary wash and allow to dry Contaminated pad face Clean vacuum pad Excessive glaze or wear on pad face Replace vacuum pad at least once every two years More than 10 strokes needed to apply Any of the above Perform general maintenance Dirt or lubricant on check valve Remove clean and reinstall plunger assembly retainer and check valve as direc...

Page 3: ... cause leakage Scratches near the open end of the handle rarely present a problem Make sure that no lubricant remains inside the handle Drop the check valve inside the handle so that it lays flat against the closed end Using a dowel or other tool that will not scratch the sides of the handle push the retainer all the way into the handle to hold the check valve securely in place Attach Handle to Va...

Page 4: ...that could cause the cup to slip or to disengage prematurely such as contaminants cuts or scratches in the pad face or load surface applying the cup to porous materials or applying pressure against the pad edge Do not use the cup to lift when the red line is visible If the red line reappears frequently discontinue use and follow the instructions for general maintenance and testing Do not allow any...

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