GUIDE BAR TROUBLESHOOTING
TECHNICAL INFORMATIONS
GUIDE BAR RAIL CONDITIONS
1. CHIPPED RAIL Symptoms : Material chipping out of one or both rails behind the hard tip. Cause : Chipping of rails behind hard tip. Continual pressure of bar on one area. Dull chain. Loose bar tension. Remedy : Flip bar to reduce wear. Replace bar. (This chipping can cause chain damage)
4. WIRE EDGE BAR RAIL Symptoms : Rail edges may chip if wire edge is not removed. Cause : Normal wear caused by pressure of chain on edges of bar rails. Remedy : Use a flat file on edge of bar rail to remove wire edge.
2. THIN RAIL AND LOW RAIL Symptoms : Thin rail on one or both sides of bar. Rail could be blue color in thin area. Cause : Chain leaning over, cutting crooked. Forcing dull chain to cut. Damage to cutters on one side of chain. Remedy : Bar cannot be repaired if rail is thin and uneven. Replace
5. SPREAD RAILS (HARVESTER)
Symptoms : Guide bar will not enter log during cut or cannot make complete cut. Cause : Saw chain was struck broadside or pushed sideways. Remedy : 1. Hammer rails together with drive link in groove as spacer. Adjust saw return to allow guide bar to go further into saw box. Sharpen delimbing knives. Avoid moving tree/log when guide bar and saw chain are out of saw box. 2. Reduce guide bar feed speed.
it. Make sure chain doesn’t continue to lean. If it does, replace with a new chain.
3. WORN BAR RAILS Symptoms : Shallow groove. Cause : Worn bar rails are normal for a bar that has been in service for a period of time. Remedy : Replace bar.
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Technical Informations
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