Hyundai HTRE2240-1 Original Instructions Manual page 16

Check: Reverse the bar from time to time to avoid the effects of wear. The bar rail
should always be in place. Use a ruler to observe it. If a gap is observed between
them, then the rail is normal. Otherwise, the rail is worn out. A bar must be corrected
or replaced.
c. Sprocket
Check the sprocket on signs of wear. If wearing is important, replace it with a new
one. Do not install a chain on a worn or damaged sprocket. Do not install a worn
chain on a pinion.
d. chain saw
Check each time the cutter and cutting angles are as shown below.
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