WOOD'S POWR-GRIP N6000P Operating instructions

WOOD'S POWR-GRIP
®
GUIDE TO MAINTENANCE,
TROUBLESHOOTING, AND REPAIR
THE ORIGINAL
& TRUSTED NAME
IN VACUUM LIFTING
EQUIPMENT
Wood's Powr-Grip products are sold
through authorized dealers.
800.548.7341
WPG.com
908 West Main - P.O. Box 368
Laurel, Montana 59044 U.S.A.
406.628.8231 (phone)
406.628.8354 (fax)
N4000, N4100, N5000,
N6000, N4000TS,
N5000CS, N6000P
Industrial-Grade
Plastic Handle
Hand Cups
Rev. 1.5 / 10-21 Plastic Troubleshooter 1LTS
General Maintenance
Inspect the Hand Cup Regularly:
• Make sure the air lter is in place; if not, discontinue use until the lter is replaced.
• Examine the plunger and handle for cracks or other damage.
• Make sure the face of the vacuum pad feels grippy (not slick). Otherwise, replace the pad.
• Examine the vacuum pad for cuts or roughness on the sealing edges (see Inspect the Sealing Edges below).
• Periodically test the cup for excessive leakage (see Leak-Test the Hand Cup below), 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 which corrective action is needed.
Clean the Vacuum Pad:
• Remove the air lter from the pad face.
• Use a clean sponge or lint-free cloth to apply soapy water or another mild cleanser to the pad 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 facedown
or cover the suction inlet in the lter recess.
• If the pad has a felt strip at the edge, be careful not to dampen it.
• Wipe all residue from the pad face and allow the cup to dry.
• Reinstall the air lter.
Inspecting and Testing the Cup for Leakage
Inspect the Sealing Edges:
• Slowly draw your nger along the entire length of the sealing edges, to check for roughness or
foreign material.
• 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.
Leak-Test the Hand Cup:
• Attach the cup 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.
32621
Based on product information at time of publication. Environmental conditions can a󰀨ect product performance and longevity;
consult the product instructions on www.WPG.com or contact a Technical Sales Representative for more information.

PARTS AND ASSEMBLY
TROUBLESHOOTING GUIDE
PROBLEM CAUSE CORRECTION
Slow leakage
Cuts on sealing edge Replace vacuum pad.
Dirt or lint inside pump Wipe inside of handle with a soft cloth. Check for contamination on
U-cup or button.
Dry pump Apply a light coating of plunger lube inside handle.
Scratches inside handle (between
mid-point and closed end) Replace handle/release valve assembly.
Contamination of rubber seal on valve
lever
Press valve release lever and blow rubber seal clean with air hose.
If contamination remains, replace handle/release valve assembly.
Contaminated pad face Clean vacuum pad.
Severe leakage
Severe contamination Clean plunger assembly and inside of handle.
Gouges or cuts on sealing edge Replace vacuum pad.
Broken handle or release valve Replace handle/release-valve assembly.
Jammed or sluggish pump
Dry pump Apply a light coating of plunger lube inside handle.
Obstructed release valve stem Remove obstruction (through suction inlet behind air lter).
Severe contamination Clean plunger assembly and inside of handle.
Pad slips when attached
Contaminated load surface Wipe surface clean. If necessary, wash and allow to dry.
Contaminated pad face Clean vacuum pad.
Slick or worn pad face Replace vacuum pad (at least once every 2 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 directed in Disassembly and Assembly sections (on facing
page).
1 90151AM Handle / Release Valve Assembly
2 90154AM Plunger Assembly
90158AM Plunger Assembly, High Elevation (for N4100)
3 49480T Vacuum Pad, 8" [20 cm] Dia., Flat, Lipped (VPFS8L)
49478T Vacuum Pad, 8" [20 cm] Dia., Flat, Lipped,
Low-Marking (VPFS8L)
49495T Vacuum Pad, 8" [20 cm] Diameter -
for IMP & Cladding Surfaces (VPFS8C)
49488T Vacuum Pad, 8" [20 cm] Dia.,
for Textured Surfaces (G0695TS)
49506T Vacuum Pad, 9" [23 cm] Dia., Flat (G0725)
49520T Vacuum Pad, 9" [23 cm] Dia., Concave (VPCS9)
49586T Vacuum Pad, 10" [25 cm] Dia., Concave (G0750)
4 Check Valve Retainer*
5 Check Valve*
6 Air Filter*
7 10002 Handle Screws (6)
8 Red Line
9 Valve Release Lever
10 U-Cup
11 Button
Not Shown
29330 8" [20 cm] Case, Yellow
29335 8" [20 cm] Case, Grey
29338 9" [23 cm] Case, Black
29342 10" [25 cm] Case, Black
Plunger Lube*
*Repair Kit #90160

Disassembly Procedures
Remove Plunger Assembly from Handle
• Grasp the head of the plunger assembly and pull it straight out from the handle.
• Be careful to keep the plunger assembly clean and free of contaminants
when it is not in the handle.
Remove Handle from Vacuum Pad
• Remove the 6 handle screws, and separate the handle from the pad.
• Carefully remove the valve stem from the rubber nipple on the pad by gently
pulling on the handle and twisting it back and forth.
Remove Retainer and Check Valve from Handle
• Remove the retainer and check valve using a hooked scribe or similar tool.
Be careful not to scratch the plastic!
• With a soft, lint-free cloth, carefully clean these parts, as well as the plunger
assembly, paying particular attention to the U-cup and button.
• Wrap a small dowel or rod with a soft, lint-free cloth and gently wipe the inside
of the handle, to make sure it is clean and dry (lubricant-free).
Assembly Procedures
Inspect Handle, and Reinstall Check Valve and Retainer
• Carefully examine the inside of the handle for scratches and contaminants, using
a ashlight for illumination:
▪ Scratches between the midpoint and the closed end of the handle can 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 lies at 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 Vacuum Pad
• Apply a light coating of plunger lube to the valve stem on the handle.
• Insert the valve stem into the pad nipple and place the handle on the pad.
• Align the screw holes and reinstall the handle screws.
Reinsert Plunger Assembly into Handle
• Apply plunger lube all the way around the exposed surface of the U-cup. Be careful
 tokeeplubricantothebutton!
• Plunger lube is recommended; contact Wood's Powr-Grip Customer Service to order this.
• Do not use improper lubricants in the handle.
• While making certain the button, check valve and retainer remain free of lubricant,
insert the U-cup end of the plunger assembly into the handle.
• Push the plunger assembly until it begins to tighten; then seat the plunger assembly
with one strong, swift motion.
• Operate the plunger, turning it to spread the plunger lube thoroughly on the U-cup.
• Now the cup is assembled and ready for testing.

WARNINGS
Wood’s Powr-Grip has taken great care to produce the most reliable vacuum-operated
handling device available. Nevertheless, mistreatment or misuse may damage a hand
cup or otherwise create conditions which could cause the hand cup to fail, resulting
in an unexpected release. The following warnings are o󰀨ered to help users avoid most
potential hazards.
Failure to observe WARNINGS could damage
the cup or the load, or cause injury to the user.
• Do not use the cup with loads that exceed the load capacity.
• Do not use the cup to support a person.
• Do not place the pad face against surfaces that could damage the sealing edges.
• Avoid conditions 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 anything to interfere with free movement of the plunger while the cup is
attached. This could prevent the red line from warning the user of vacuum loss.
• Do not touch the release-valve lever while lifting.
• Do not attach 10" [25 cm] diameter cups (models N6000 and N6000P) to thin,
fragile materials.
• Do not use harsh chemicals (such as solvents or gasoline) or unauthorized rubber
cleaners and conditioners to clean the cup. See www.WPG.com for more information.