SECTION 7: SERVICE

Review the troubleshooting and procedures in this section if a problem develops with your machine. If you need replacement parts or additional help with a procedure, call our Technical Support at (570) 546-9663. Note: Please gather the serial number and manufacture date of your machine before calling.

Troubleshooting

Symptom

 

 

Possible Cause

Possible Solution

Motor will not start.

1.

Switch disabling key removed.

1.

Insert key to enable switch.

 

 

 

 

 

2.

Loose connections at motor or switch.

2.

Inspect all motor connections for loose or open

 

 

 

 

 

 

 

 

connections.

 

 

 

 

 

3.

Motor brushes worn.

3.

Replace motor brushes as a set.

 

 

 

 

 

 

 

 

Motor

will

not

 

1.

Short circuit in line cord or plug.

1.

Inspect cord and plug for damaged insulation

start; fuses or

 

 

 

 

or shorted wires.

circuit breakers

 

2.

Loose connections at motor switch.

2.

Inspect all motor connections for loose or

blow.

 

 

 

 

 

 

 

 

 

 

 

shorted terminals or worn insulation.

 

 

 

 

 

 

 

 

 

 

 

 

 

3.

Switch, bridge rectifier or motor at fault.

3.

Replace the component at fault.

 

 

 

 

 

 

 

 

Motor

 

stalls

 

1.

Motor overloaded.

1.

Reduce feeding pressure.

(resulting

in

 

 

 

 

 

blown fuses or

 

 

 

 

 

tripped circuit).

 

 

 

 

 

 

 

 

 

 

 

Machine slows

 

1.

Workpiece pressure is too great.

1.

Secure machine to workbench.

when operating.

 

 

 

 

 

 

 

 

 

 

 

 

 

Deep

 

 

sanding

1.

Sanding sleeve too coarse for the

1.

Use a finer grit sanding sleeve.

grooves

or

scars in

 

desired finish.

 

 

workpiece.

 

 

2.

Workpiece sanded across the grain.

2.

Sand with the grain.

 

 

 

 

 

 

 

 

 

 

3.

Too much feeding pressure against

3.

Reduce pressure on workpiece while sanding.

 

 

 

 

 

 

workpiece.

 

 

 

 

 

 

 

 

 

 

Grains

rub

off

the

1.

Sanding sleeve has been stored in an

1.

Store sanding sleeve away from extremely dry

sanding sleeve.

 

 

incorrect environment.

 

or hot temperatures.

 

 

 

 

 

2.

Sanding sleeve has been folded or

2.

Store sanding sleeves separately and not

 

 

 

 

 

 

smashed.

 

folded or flat.

 

 

 

 

 

 

Sanding

surfaces

1.

Too much pressure against sleeve.

1.

Reduce pressure on workpiece while sanding.

clog quickly or burn.

2.

Sanding softwood or wood with a high

2.

Either use different wood or plan on cleaning/

 

 

 

 

 

 

sap content.

 

replacing sleeves frequently.

 

 

 

 

 

 

 

Burn

marks

on

1.

Using too fine of sanding grit.

1.

Use a coarser grit sanding sleeve.

workpiece.

 

 

2.

Using too much pressure.

2.

Reduce pressure on workpiece while sanding.

 

 

 

 

 

3.

Work held still for too long.

3.

Do not keep workpiece in one place for too long.

 

 

 

 

 

 

 

 

 

-20-

Model G0739 (Mfg. Since 2/12)

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Grizzly GO739 owner manual Service, Troubleshooting