Oregon CHAINSAW Maintenance And Safety Manual page 55

SAW-CHAIN TROUBLESHOOTING (CONTINUED)
Cutters and tie straps wear heavily or break.
13
Excessive heel wear on
cutters and opposite tie
straps.
Remedy: See H.
16
Bottoms of tie straps and cutters worn out of square. Remedy: See J.
REMEDIES:
H. Replace worn or cracked cutters and/or tie straps.
NOTE: One or more of the following may be required to prevent
future wear and/or cracks: (1) Refile cutters using the correct
angles. (2) Keep more lubrication on the chain and bar. (3)
Reduce the amount of depth-gauge setting (may require replacement
of the chain). (4) Do not force dull chain to cut. (5) Do not force
chain through frozen wood. (6) Keep cutters sharp. (7)
Always maintain proper tension. (pictures 13 and 14)
I. NOTE: Such breakage is usually caused by incorrect field assembly
of preset tie straps. Breakage usually occurs on the tie strap
opposite the factory preset tie strap. See number 7, page 21 for
correctly shaped rivets. (picture 15)
J. Dress the tops of the guide bar's rails square. If wear is minor, file
the bottoms of tie straps and cutters square. If wear is extensive,
replace the chain. (picture16)
SAW CHAIN
PROBLEM
14
Cracks under rear rivet
holes on cutters and
opposite tie straps.
Remedy: See H.
SAW CHAIN SAW CHAIN
15
Tie straps between cut-
ters, broken in the center.
Remedy: See I.
51.