Oregon CHAINSAW Maintenance And Safety Manual page 56

SAW-CHAIN TROUBLESHOOTING (CONTINUED)
17
Straight bottoms.
Remedy: See K.
20
Peening in front or back.
Remedy: See M.
23
REMEDIES:
K. Check your guide bar (grooves in bar's body or nose have worn
too
shallow), and check your rim or spur drive sprocket (excessive wear
is allowing drive links to bottom out).
Replace bar, sprocket, or both. Sharpen drive-ling tangs, as shown
in the illustration on page 45, if possible. If not, replace the
chain.
(pictures 17 and 18)
L.
Maintain proper tension to prevent chain from climbing out of spur
drive sprocket. Replace drive links or replace entire chain if many
drive links are damaged. (picture 19)
52.
SAW CHAIN
Drive links wear heavily or break.
18
Concave bottoms.
Remedy: See K.
21
Drive-link tang is turned
up. Remedy: See N.
SAW CHAIN SAW CHAIN
PROBLEM
Sides worn round or
thin at bottoms.
Remedy: See P.
19
Battered and broken bot-
toms. Remedy: See L.
22
Worn fronts.
Remedy: See O.