An Guide Bar - Gasoline 4500 Owner's Manual

SAW CHAIN
WARNING
It is very important for
smooth and safe operation to
keep the cutters always
sharps.
Your cutters need to be
sharpened when:
Sawdust becomes
powder-like.
You need extra force
to saw in.
The cut way does not
go straight.
Vibration increases.
Fuel consumption
increases.
Cutter setting standards:
WARNING
Be sure to wear safety gloves.
Before filling
Make sure the saw
chain is held securely
Make sure the engine
is stopped.
Use a round file of
proper size for your
chain.
Chain type: 21BP
File size: 3/16 in(4.76m)
Place your file on the cutter
and push straight forward.
Keep the file position as
illustrated. (34)
After every cutter has been
set. Check the depth gauge
and file it to the proper level
as illustrated. (35)
WARNING
Be sure to round off the front
edge to reduce the chance of
kickback or tie-strap
breakage
(1) Appropriate gauge
checker
(2) Make the shoulder round
(3) Depth gauge standard
Make sure every cutter has
the same length and edge
angles as illustrated. (36)
(4) Cutter length
(5) Filling angle
(6) Side plate angle
(7) Top plate cutting angle
GUIDE BAR
Reverse the bar occasionally to
prevent partial wear.
The bar rail should always be a
square. Check of wear of the bar
rail. Apply a ruler to the bar and
the outside of cutter. If a gap is
observed between them, the rail is
normal. Otherwise, the bar rail is
worn. Such a bar needs to be
corrected or replaced. (37)
(1) Ruler
(2) Gap
(3) No gap
(4) Chain tilts