WOOD'S POWR-GRIP LJ6VH 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)
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.
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 assembly and handle for dents, 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 edge (see Inspect the Sealing Edge 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
what 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.
• 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 edge, to check for roughness or
foreign material.
• Examine the sealing edge 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.
LJ6VH(WBP)
VERTICAL HANDLE
AND TL6AG ANGLE
GRIP HAND CUPS
Rev. 0.5/ 02-22 VH and AG Troubleshooter
1VHTS 32625

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.
Contaminated pad face Clean vacuum pad.
Severe leakage
Severe contamination Clean plunger assembly and inside of handle.
Gouges or cuts on sealing
edges Replace vacuum pad.
Jammed or
sluggish pump
Obstructed valve inlet Remove obstruction from suction inlet (behind air lter)
or from space between handle and pad.
Severe contamination Clean plunger assembly and inside of handle.
Dented or cracked handle Replace handle.
Bent or cracked plunger Replace plunger assembly.
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 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 directed in Disassembly and
Assembly sections.
PARTS AND ASSEMBLY
1 90115 Handle, Vertical
2 61130RP Handle, Angle Grip
3 90520AM Plunger Assembly, Metal
90524AM Plunger Assembly, Metal with Audio Alarm (WBP)
4 90154AM Plunger Assembly, Industrial-Grade Plastic
5 49416T Vacuum Pad, 6" (15 cm) Dia., Concave (LJ6)
6 49386T Vacuum Pad, 6" (15 cm) Dia., Concave (TL6)
7 Air Filter*
8 Red Line
9 Check Valve Retainer*
10 Check Valve*
11 Release Tab
12 10006 Screws, 10-32 x 5/16" (4)
13 10014 Screws, 10-32 x 7/16" (4)
14 Button and U-Cup
Not Shown
29312 Pad Cover, 6" (15 cm)
Plunger Lube*
*Repair Kit #90160
4
2
6
7
8
9
10
11
13
14
3
8
910
5
7
1
11
12
14

Disassembly Procedures
Assembly Procedures
Remove Plunger Assembly from Handle
• Grasp the head of the plunger assembly and pull it straight out from the handle. If the plunger
assembly is too tight to be removed this way, return the hand cup for repair.
Note: Disassembly of the plunger assembly is not recommended.
• Replace the plunger assembly if the plunger housing is bent, cracked or otherwise damaged.
• Otherwise, wipe the plunger assembly clean with a soft, lint-free cloth, paying particular
attention to the U-cup and button. Be careful to keep the plunger assembly clean when
it is not in the handle.
Remove Handle from Vacuum Pad
• Remove the 4 screws, and separate the handle from the pad.
• Wipe o󰀨 the contact surfaces between the handle and pad, to ensure a good seal
during reassembly.
• Make sure the pad’s suction inlet is clean, dry and free of contaminants.
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 inside of the handle!
• With a soft, lint-free cloth, carefully clean these parts.
• 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).
Inspect Handle, and Reinstall Check Valve and Retainer
• Carefully examine the inside of the handle for scratches and contaminants, using a ashlight:
▪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
• Align the screw holes in the handle with those on the pad.
• Reinstall the screws and tighten them securely.
Reinsert Plunger Assembly into Handle
• Using a soft swab, apply light coating of plunger lube in a ring around the inside of the handle,
at a point about 1" (2.5 cm) from the closed end. Keep the open end of the handle as dry
(lubricant-free) as possible.
• Plunger lube is recommended; contact Wood's Powr-Grip Customer Service to order this.
Do not use improper lubricants in the handle!
• While making sure to avoid contaminating the check valve with 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 devices 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 to lift loads that exceed the load capacity.
• Do not use the cup to support a person.
• Do not leave a cup unattended which could injure people if it disengages unexpectedly.
• Do not place the vacuum pad against surfaces which could damage the sealing edge.
• 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; attaching 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 any release tab while lifting.
• Do not use harsh chemicals (such as solvents or gasoline) or rubber cleaners and conditioners
to clean the pad. See www.WPG.com for more information.