Manuals / Powermatic / Power Tools / Sander

Powermatic WB-25, WB-37, WB-43 operating instructions Trouble, Probable Cause, Remedy

Models: WB-43 WB-25

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Trouble

The rear end of stock is thinner than the front.

Uneven thickness between the left and right sides of the workpiece.

Uneven thickness between the front and rear ends of the workpiece.

Workpiece slips on conveyor belt.

Straight strip of notches or grooves in the workpiece.

“Snake” marks on workpiece.

Straight parallel running stripes over entire width of workpiece.

Glossy spots on the wood.

Probable Cause	Remedy

Front pressure bar is too low in	Raise front pressure bar (page 16).
relation to the contact drum.

Table not positioned correctly in	Adjust table until it is parallel left to
relation to contact drum.	right (pages 17-18).

Front pressure bar not in correct	Adjust front pressure bar to parallel.
position in relation to contact drum.	See page 16.

Graphite strip and felt pad are worn	Replace graphite strip and felt pad.
out.	See page 14.

Conveyor belt is worn.	Replace conveyor belt (contact
	Powermatic Technical Service).

Feed rate is too high.	Reduce feed rate. See page 16.

Too much stock removal.	Reduce amount of material being
	removed.

Grit of sanding belt too fine.	Use larger grit sanding belt.

Unequal position of pressure bars.	Adjust pressure bars to produce equal
	pressure on stock.

Table not parallel front to back.	Adjust table until it is parallel front to
	back (pages 17-18).

Not enough pressure between	Increase pressure between pressure
pressure bar and workpiece.	bar and workpiece.

Too much dust or debris on conveyor	Clean conveyor belt with compressed
belt.	air.

Rear pressure bar too low, halts the	Raise rear pressure bar until proper
workpiece.	contact is achieved.

Dirty pressure bar.	Clean pressure bar.

Contact drum is scratched.	Replace contact drum.

Graphite strip and felt pad are worn.	Replace graphite and pad.

Local damage to the sanding belt.	Replace sanding belt.

Joint of the sanding belt is too thick or	Repair joint or replace sanding belt.
is open.

Sanding belt is too old.	Replace with new sanding belt.

Rear pressure bar is too low.	Raise rear pressure bar.

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Powermatic WB-25, WB-37, WB-43 operating instructions Trouble, Probable Cause, Remedy

Contents

model WB-37 shown PowermaticModels WB-25, WB-37, WB-43 Part No. M-1790825What is Covered 1.0 Warranty and ServiceWarranty Period Warranty Limitations2.0 Table of Contents Section16.8.1 Pressure Bar Assembly - Models WB-25, WB-37, WB-43 3.0 Safety warnings SAVE THESE INSTRUCTIONS 3.0 Safety warningsTable Height from Floor in 5.0 Specifications4.0 Introduction Dust Ports6.1 Contents of Shipping Container 6.0 Unpacking7.1 Air Supply Connection 7.0 Assembly7.2 Dust Collection 8.0 Electrical 7.3 Installing/Replacing Sanding Belt8.1 Grounding Instructions 8.2 230 Volt Operation Model WB-25 shown8.4 Extension cords 9.0 Adjustments8.3 460 Volt Conversion 9.1 Sanding Belt Tracking and Oscillation9.2 Oscillation Air Flow 9.3 Oscillation Speed9.4 Platen Position 9.6 V-Belt Tension and Replacement9.5 Replacing Graphite and Felt Pad 9.8 Conveyor Belt Tracking 9.7 Conveyor Belt TensionKeep hands away from the moving conveyor belt 9.10 Pressure Bar Adjustment 9.9 Feed Rate9.11 Table Parallelism 10.1 Amperage Meter 10.0 Operating Controls10.2 LED Controller and Keypad 10.2.2 Using the LED for Operations 11.0 Operation11.1 Braking System 10.2.1 Calibration12.0 Maintenance 13.0 Dust Port LayoutProbable Cause 14.0 Troubleshooting the SanderTrouble RemedyProbable Cause TroubleRemedy Trouble 15.0 Troubleshooting the LED Unit16.0 Replacement Parts Probable Cause16.1.1 Base and Motor Assembly - Model WB-25 ONLY Parts list on pageDescription 16.1.2 Parts List Base and Motor Assembly - Model WB-25Index No. Part No Size16.2.1 Base and Motor Assembly - Model WB-37 ONLY Parts list on pageDescription 16.2.2 Parts List Base and Motor Assembly - Model WB-37Index No. Part No Size16.3.1 Base and Motor Assembly - Model WB-43 ONLY Parts list on pageDescription 16.3.2 Parts List Base and Motor Assembly - Model WB-43Index No. Part No Size16.4.1 Upper Cabinet Assembly - Model WB-25 ONLY Parts list on pageDescription 16.4.2 Parts List Upper Cabinet Assembly - Model WB-25Index No. Part No Size16.5.1 Upper Cabinet Assembly - Models WB-37, WB-43 Parts list on pageIndex No. Part No 16.5.2 Parts List Upper Cabinet Assembly - Model WB-3716.5.3 Parts List Upper Cabinet Assembly - Model WB-43 Description16.6.1 Table Raising Assembly - Models WB-25, WB-37, WB-43 Parts list on page 35 WB-25, page 36 WB-37 and page 37 WB-43Description 16.6.2 Parts List Table Raising Assembly - Model WB-25Index No. Part No SizeDescription 16.6.3 Parts List Table Raising Assembly - Model WB-37Index No. Part No SizeDescription 16.6.4 Parts List Table Raising Assembly - Model WB-43Index No. Part No Size6294333 16.7.1 Table and Conveyor Belt Assembly - Models WB-25, WB-37, WB-43 Parts list on page 40 WB-25, page 41 WB-37 and page 42 WB-43Description 16.7.2 Parts List Table and Conveyor Belt Assembly - Model WB-25Index No. Part No SizeDescription 16.7.3 Parts List Table and Conveyor Belt Assembly - Model WB-37Index No. Part No SizeDescription 16.7.4 Parts List Table and Conveyor Belt Assembly - Model WB-43Index No. Part No SizeIndex No. Part No 16.8.1 Pressure Bar Assembly - Models WB-25, WB-37, WB-4316.8.2 Parts List Pressure Bar Assembly - Model WB-25 DescriptionIndex No. Part No 16.8.3 Parts List Pressure Bar Assembly - Model WB-3716.8.4 Parts List Pressure Bar Assembly - Model WB-43 DescriptionIndex No. Part No 16.9.1 Platen Assembly - Model WB-25 only16.9.2 Parts List Platen Assembly - Model WB-25 DescriptionDescription Index No. Part NoSize Index No. Part No 16.10.1 Platen Assembly - Models WB-37, WB-4316.10.2 Parts List Platen Assembly - Model WB-37 DescriptionDescription 16.10.3 Parts List Platen Assembly - Model WB-43Index No. Part No SizeTS-0060061 Index No. Part No 16.11.1 Air Regulator Assembly - Models WB-25, WB-37, WB-4316.11.2 Parts List Air Regulator Assembly - Model WB-25 DescriptionDescription 16.11.3 Parts List Air Regulator Assembly - Model WB-37Index No. Part No SizeDescription 16.11.4 Parts List Air Regulator Assembly - Model WB-43Index No. Part No Size16.12.1 Sanding Belt and Accessories - Models WB-25, WB-37, WB-43 Parts list on page16.12.4 Parts List Sanding Belt and Accessories - Model WB-43 16.12.2 Parts List Sanding Belt and Accessories - Model WB-2516.12.3 Parts List Sanding Belt and Accessories - Model WB-37 Index No. Part No16.13.1 Tension Roller Assembly - Models WB-25 and WB-37 ONLY Parts list on page 56 WB-25 and page 57 WB-37Description 16.13.2 Parts List Tension Roller Assembly - Model WB-25Index No. Part No SizeDescription 16.13.3 Parts List Tension Roller Assembly - Model WB-37Index No. Part No SizeSize Index No. Part NoDescription WB25-14916.14.1 Tension Roller Assembly - Model WB-43 ONLY Parts list on pageDescription 16.14.2 Parts List Tension Roller Assembly - Model WB-43Index No. Part No SizeSize Index No. Part NoDescription WB43-16316.15.1 Electrical Box Assembly - Models WB-25 and WB-37 Parts list on page 63 WB-25 and 64 WB-37Description 16.15.2 Parts List Electrical Box Assembly - Model WB-25Index No. Part No SizeDescription 16.15.3 Parts List Electrical Box Assembly - Model WB-37Index No. Part No Size16.16.1 Electrical Box Assembly - Model WB-43 ONLY Parts list on pageDescription 16.16.2 Parts List Electrical Box Assembly - Model WB-43Index No. Part No Size17.0 Electrical Connections 17.1 Models WB-25 and WB-37 ONLY17.2 Model WB-43 ONLY