Saw Chain Troubleshooting
N. Drive sprocket has worn down until drive link tangs hit bottom. Replace drive sprocket. Sharpen drive link tangs as shown in the illustration below, if possible. If not, replace the saw chain. (picture 21, previous page )
O. Remove damage from sides of drive links with a flat file. Sharpen drive link tangs as shown in the illustration below. Use a thin file to open the groove lead-in at the guide bar’s tail. (picture 22, previous page)
P. Guide bar rails have spread, or one rail has worn low, allowing saw chain to lean over. Have guide bar rails serviced by a dealer, otherwise replace guide bar. Replace saw chain if wear is extensive or if problem persists. (picture 23, previous page)
NOTE: Also check bottoms of tie straps (see picture 16, page 52), and tops of guide bar rails (see picture 33, page 66).
Sharpening Drive Link Tangs
Pointed drive link tangs help remove chips and debris from your guide bar groove. Sharpen damaged tangs back to original shape with a round file.
Problem
Saw chain has tight joints Tight joints are caused by either: loose tension or a worn out drive sprocket. Look closely at your saw chain’s chassis.
24 25 26
Peening on bottoms of cutters and tie straps. Remedy: See Q.
Peening on front corners of cutters and tie straps. Remedy: See Q.
Peening in notches of cutters and tie straps. Remedy: See R.
Remedies: Q. Chain with tight joints cannot be repaired. Replace the saw chain and maintain proper tension. Replace rim drive sprocket if worn. (pictures 24 and 25)
54
R. Replace the spur drive sprocket. Replace the saw chain. Always maintain proper tension and do not run saw chain on a worn drive sprocket. (picture 26)
SAW CHAIN
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