Grizzly G8794 instruction manual Troubleshooting, Symptom Possible Cause Corrective Action

Page 27

TROUBLESHOOTING

This section covers the most common machine problems encountered in planing and what to do about them. Refer also to Section 7: Operations, Wood Characteristics for additional guidelines on processing problems. Do not make any adjustments until planer is unplugged and moving parts have come to a com- plete stop.

SYMPTOM

POSSIBLE CAUSE

CORRECTIVE ACTION

 

 

 

 

 

Motor will not start.

1.

Low voltage.

1.

Check power line for proper voltage.

 

 

2.

Open circuit in motor or loose

2.

Inspect all lead connections on motor for loose or open connec-

 

 

 

connections.

 

tions.

 

 

 

 

 

Motor will not start; fuses or

1.

Short circuit in line cord or plug.

1.

Inspect cord or plug for damaged insulation and shorted wires.

circuit breakers blow.

2.

Short circuit in motor or loose

2.

Inspect all connections on motor for loose or shorted terminals or

 

 

 

connections.

 

worn insulation.

 

 

3.

Incorrect fuses or circuit break-

3.

Install correct fuses or circuit breakers.

 

 

 

ers in power line.

 

 

 

 

 

 

 

Motor overheats.

1.

Motor overloaded.

1.

Reduce depth of cut.

 

 

2.

Air circulation through the motor

2.

Clean out motor to provide normal air circulation.

 

 

 

restricted.

 

 

 

 

 

 

 

 

Motor

stalls (resulting in

1.

Short circuit in motor or loose

1.

Inspect connections on motor for loose or shorted terminals or

blown fuses or tripped cir-

 

connections.

 

worn insulation.

cuit).

 

2.

Low voltage.

2

Correct the low voltage conditions.

 

 

3.

Incorrect fuses or circuit break-

3.

Install correct fuses or circuit breakers.

 

 

 

ers in power line.

 

 

 

 

4.

Motor overloaded.

4.

Reduce load on motor.

 

 

 

 

 

Motor arcing visibly through

1.

Brushes sticking.

1.

Check that brush holder is free of dirt and that brush moves freely.

vents or runs erratically.

2.

Brushes worn.

2.

Replace both brushes.

 

 

 

 

 

Machine slows when oper-

1.

Depth of cut too great.

1.

Reduce depth of cut.

ating.

 

2.

Brushes worn.

2.

Replace both brushes.

 

 

 

 

 

Machine is loud when cut-

1.

Excessive depth of cut.

1.

Decrease depth of cut.

ting. Overheats or bogs

2.

Blades are dull.

2.

Sharpen blades.

down in the cut.

3.

Blade holder or blade assembly

3.

Recheck complete blade installation and tighten all screws.

 

 

 

mounting is loose.

4.

Replace belt.

 

 

4.

Belt is worn or loose.

 

 

 

 

5.

Short circuit in motor.

5.

Inspect by qualified electrical technician.

 

 

 

Planer starts, but cutterhead

Worn or broken belt.

Replace belt.

does not move.

 

 

 

 

 

 

 

 

 

 

Planer

starts, cutterhead

1.

Blade not extending far enough.

1.

Increase depth of cut.

turns, no cut.

2.

Belt worn or slipping.

2.

Replace belt.

 

 

 

 

 

Loud, repetitious noise com-

1.

Blades are dull.

1.

Sharpen blades.

ing from machine

2.

Excessive depth of cut.

2.

Decrease depth of cut.

 

 

3.

Cutting against natural wood grain.

3.

Reverse cutting direction.

 

 

4.

High wood moisture content.

4.

Dry wood.

 

 

 

Cannot control snipe.

Long or heavy board sags as it enters

Lift up on unsupported end of board as it enters and exits cutterhead.

 

 

and exits.

 

 

 

 

 

 

 

 

G8794 1212" Portable Planer

-25-

Image 27
Contents 121⁄2 Portable Planer Page Table Of Contents Safety Instructions For Power Tools SafetyAMP Rating Additional Safety Instructions For Portable Planer Extension Cords FusingCircuit Requirements 110V Operation GroundingCommentary General InformationUnpacking Piece Inventory Clean up Site Considerations Mounting to Bench AssemblyHandle Assembly Chip DeflectorOn-Off Switch Depth-Of-Cut Reset ButtonControls Adjustments Knife SettingExtension Wings Head. See Figure Operations Test RunPlaning Tips Wood Types Wood CharacteristicsConvenient cord storage G8794 121⁄2 Portable Planer Storing Power CordMaintenance GeneralKnife Sharpening Belt pulleys and guard MotorV-BeltLubrication Feed RollersClosure Machine Data Sheet 16 15 14 13 12 11 10 9 8 7 6 5 22 23 24 Flat HD SCR M6XP1.0X16L Retainer Symptom Possible Cause Corrective Action TroubleshootingWarranty and Returns Warranty Card Grizzly INDUSTRIAL, INC