Ryobi RCS-4450C User Manual

32
English
GB
F D E I P NL S DK N FIN GR HU CZ RU RO PL SLO HR TR EST LT LV SK BG
MAINTENANCE
SHARPENING THE CUTTERS (Fig. 49 - 52)
Parts of a cutter:
(A) Cutting corner (B) Side plate (C) Depth gauge
(D) Toe (E) Gullet (F) Heel
(G) Rivet hole (H) Top plate
Be careful to fi le all cutters to the specifi ed angles and to
the same length, as fast cutting can only be obtained when
all cutters are uniform.
WARNING
The saw chain is very sharp. Always wear protective
gloves when performing maintenance to the chain to
prevent serious personal injury.
■ Tension the chain prior to sharpening. Refer to
Adjusting The Chain Tension.
■ Use a 1.6 mm diameter round fi le and holder (not
provided). Do all of your fi ling at the midpoint of the
bar.
■ Keep the fi le level with the top plate of the tooth. Do
not let the fi le dip or rock.
■ Using light but fi rm pressure. Stroke towards the front
corner of the tooth.
■ Lift the fi le away from the steel on each return stroke.
■ Put a few fi rm strokes on every tooth. File all left hand
cutters (A) in one direction. Then move to the other
side and fi le the right hand cutters (B) in the opposite
direction.
■ Remove fi lings from the fi le with a wire brush.
CAUTION
A dull or improperly sharpened chain can cause
excessive engine speed during cutting, which may
result in severe engine damage.
WARNING
Improper chain sharpening increases the potential
of kickback.
WARNING
Failure to replace or repair a damaged chain can
cause serious injury.
TOP PLATE FILING ANGLE (Fig. 53)
(A) CORRECT 30° – fi le holders are marked with guide
marks to align fi le properly to produce correct top
plate angle.
(B) LESS THAN 30° – for cross cutting.
(C) MORE THAN 30° – feathered edge dulls quickly.
SIDE PLATE ANGLE (Fig. 54)
(D) CORRECT 80° – Produced automatically if you use
the correct diameter fi le in the fi le holder.
(E) HOOK – “Grabs” and dulls quickly; increases the
potential of KICKBACK. Results from using a fi le with
a diameter too small or a fi le held too low.
(F) BACKWARD SLOPE – Needs too much feed
pressure; causes excessive wear to the bar and
chain. Results from using a fi le with a diameter too
large or fi le held too high.
MAINTAINING DEPTH GAUGE CLEARANCE (Fig. 55
- 57)
■ Maintain the depth gauge at a clearance of 0.6 mm.
Use a depth gauge tool for checking the depth gauge
clearances (A).
■ Every time the chain is fi led, check the depth gauge
clearance.
■ Use a fl at fi le (B)(not provided) and a depth gauge
jointer (C)(not provided) to lower all gauges uniformly.
Use a 0.6 mm depth gauge jointer. After lowering each
depth gauge, restore original shape by rounding the
front. Be careful not to damage adjoining drive links
with the edge of the fi le.
■ Depth gauges must be adjusted with the fl at fi le in the
same direction the adjoining cutter was fi led with the
round fi le. Use care not to contact cutter face with fl at
fi le when adjusting depth gauges.
MAINTAINING THE GUIDE BAR (Fig. 58)
CAUTION
Make sure the chain has stopped before you do any
work on the saw.
Every week of use, reverse the guide bar on the saw to
distribute the wear for maximum bar life.The bar should
be cleaned every day of use and checked for wear and
damage.
Feathering or burring of the bar rails is a normal process
of bar wear. Such faults should be smoothed with a fi le as
soon as they occur.
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Ryobi RCS-4450C Specifications

General

Brand	Ryobi
Model	RCS-4450C
Category	Chainsaw
Language	English