WOOD'S POWR-GRIP N4000 User Manual

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 a󰀨ect 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 lter is
in place; if not, discontinue use until the lter 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 lter 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 lter 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 lter.
Inspecting and Testing the Cup for Leakage
To INSPECT THE SEALING EDGES of the vacuum pad for roughness or foreign material, slowly
draw your nger 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
S
S
O
9
0
0
1
:
2
0
0
8
S
Y
S
T
E
M
C
E
T
F
I
C
T
I
O
N
R
I
A
S
32621

WOOD'S POWR-GRIP N4000 Specifications

General

Model	N4000
Category	Racks & Stands
Brand	WOOD'S POWR-GRIP
Load Capacity	4000 lbs
Number of Suction Pads	4
Weight	35 lbs
Material	Aluminum
Cup Diameter	6 in
Number of Cups	4
Suction Pad Diameter	6 in [15 cm]

Summary

General Maintenance

Regular Inspection

Inspect air filter, plunger, and pad for damage, glaze, cuts, or roughness. Test for leakage and plunger action.

Cleaning the Vacuum Pad

Clean pad with soapy water, avoid solvents. Protect pump and felt strip. Dry and reinstall filter.

Inspecting and Testing the Cup for Leakage

Inspect Sealing Edges

Check sealing edges for roughness or foreign material. Bend edge to find cuts or V-shaped gaps. Replace if damaged.

Leak Test

Attach cup to glass/metal for 2 hours. Check red line indicator. Perform maintenance if red line appears.

Parts and Assembly

Troubleshooting Guide

Slow Leakage

Addresses slow leakage issues, often caused by dirt, dry pump, or sealing edge damage. Solutions involve cleaning or replacement.

Severe Leakage

Covers severe leakage due to contamination, seal damage, or broken parts. Solutions involve cleaning, replacement, or assembly checks.

Jammed or Sluggish Pump

Deals with pump issues caused by dry pump or obstructed valve stem. Solutions include lubrication or clearing obstructions.

Pad Slips When Attached

Addresses pad slippage from contamination or pad face wear. Solutions involve cleaning the surface or replacing the pad.

More Than 10 Strokes Needed

Covers issues requiring many strokes due to valve contamination or check valve problems. Requires disassembly and cleaning.

Disassembly Procedures

Remove Plunger Assembly from Handle

Grasp plunger head and pull straight out. Keep clean and free from contaminants.

Remove Handle from Vacuum Pad

Remove handle screws and separate handle from pad. Gently pull and twist valve stem from rubber nipple.

Remove Retainer and Check Valve from Handle

Carefully remove retainer and check valve using a tool. Clean parts and inside of handle with lint-free cloth.

Assembly Procedures

Inspect Handle and Reinstall Check Valve and Retainer

Check handle for scratches/contaminants. Ensure no lubricant remains. Seat check valve and retainer securely.

Attach Handle to Vacuum Pad

Apply plunger lube to valve stem. Insert stem into pad nipple. Align screw holes and reinstall handle screws.

Reinsert Plunger Assembly into Handle

Lubricate U-cup. Insert plunger assembly, push until tight, then seat with motion. Operate plunger to spread lubricant.

Warnings

General Safety Precautions

Avoid misuse, overcapacity, or damage to sealing edges. Prevent contamination, slips, or interference with plunger.

Specific Usage Restrictions

Do not use with red line visible. Avoid interfering with plunger. Do not touch release lever while lifting. Avoid harsh chemicals.