Husqvarna Understanding Common Problems with K970 and Their Solutions

Page 27

TROUBLE SHOOTING

Troubleshooting schedule

WARNING! If service operations or trouble

!shooting does not require the machine to be on, the engine should be switched off, and the stop switch in STOP position.

Problem

Probable cause

 

 

The blade does not rotate.

Roller knobs not tightened fully.

 

 

 

The blade not fitted on guide rollers correctly.

 

 

 

Rollers tensioned too much.

 

 

The blade rotates too slowly.

Roller knobs not tightened fully.

 

 

 

Worn drive wheel.

 

 

 

The V-shaped inner diameter of the blade is worn.

 

 

 

The springs on the guide rollers are weakened.

 

 

 

Defective roller bearings.

 

 

The blade jumps out of its position.

Roller setting too loose.

 

 

 

Worn guide rollers.

 

 

 

The blade not fitted on guide rollers correctly.

 

 

 

Damaged blade.

 

 

The blade warps.

Rollers tensioned too much.

 

 

 

Blade overheating.

 

 

Segments break.

Bent, twisted or badly maintained blade.

 

 

 

Continue to use the blade only if one segment is missing or leave for

 

reconstruction when the blade is worn max 50 %.

 

 

The blade cuts too slowly.

Wrong blade for the material in question.

 

 

The blade slips.

The guide rollers does not move in and out freely. A seized roller can not press

the blade hard enough against the drive wheel.

 

 

 

 

Worn drive wheel. Abrasive material and too little water when cutting

 

increases the wear on the wheel.

 

 

 

Worn guide roller flange.When more than half of the width of the flange is worn

 

the blade slips.

 

 

 

The blade’s groove and inner edge are worn. Caused by inferior flushing of

 

abrasive material and/or a worn drive wheel causing the blade to slip.

 

 

English – 27

Image 27
Contents Ring KEY to Symbols Symbols on the machineExplanation of warning levels Contents Features PresentationDear customer What is what on the power cutter? What is WHAT?Throttle lockout MACHINE´S Safety EquipmentStop switch GeneralChecking the vibration damping system Off, and the stop switch in Stop positionVibration damping system MufflerBlades Transport and storage Fitting the blade Assembling and AdjustmentsWater hose Fuel Handling FuelFueling Long-term storage General safety precautions OperatingProtective equipment Basic working techniques Work area safetyCutting depth Small workCutting holes Pinching kickback How to aviod kickbackKickback General rulesStart the engine Starting and StoppingBefore starting StartingStopping Maintenance Maintenance scheduleFunctional inspection Functional inspection CleaningReplacing the support rollers Support rollersTensioning the drive belt Drive wheelDrive belt Replacing the drive wheelChecking the starter cord Adjusting the idle speedCarburetor StarterFuel system Replacing the air filter Reconstructing the bladeAir filter Drive gear, clutchTroubleshooting schedule Trouble ShootingTechnical Data Technical dataCutting equipment Your Warranty Rights and Obligations Federal Emission Control Warranty StatementMaintenance Statement Page 2012-01-18 rev Original instructions 1152681-95