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 pad contamination
Open release valve and blow valve pad clean with air hose.
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 valve stem
Remove obstruction (through suction inlet behind air filter).
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.
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 directed in Disassembly and Assembly sections (on facing
page).
1 90151
Handle / Release Valve Assembly
2 90154AM Plunger Assembly
90158AM Plunger Assembly, High Elevation (for N4100)
90524AM Plunger Assembly, with Audio Alarm (WBP)
3 49486T
Vacuum Pad, 8" [20 cm] Dia., Flat (G0695)
49478T
Vacuum Pad, 8" [20 cm] Dia., Flat, Lipped,
Low-Marking (VPFS8L)
49488T
Vacuum Pad, 8" [20 cm] Dia.,
Textured Surface (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 61151
Check Valve Retainer
5 51100
Check Valve
6 60024
Air Filter
7 10002
Handle Screws (6)
8
Red Line
9
Valve Release Lever
Not Shown
29330
8" [20 cm] Case
29335
8" [20 cm] Case, Grey
29338
9" [23 cm] Case
29342
10" [25 cm] Case
28504
Plunger Lube
