Adjusting The Chain Tension; Chain Maintenance - Ryobi RCS4640C Original Instructions Manual

Deutsch (Übersetzung der originalen Anleitungen)
binding.

ADJUSTING THE CHAIN TENSION

See gure 38. See gure 44 - 50.
WARNING
Never touch or adjust the chain while the motor is
running. The saw chain is very sharp. Always wear
protective gloves when performing maintenance on the
chain.
1. Stop the engine before setting the chain tension. Make
sure Handle guard is on "A" position.
2. Slightly loosen the clutch cover lock knob by pressing
in and rotating counter clockwise.
3. Turn the chain tensioning dial clockwise to tension the
chain.
NOTE: A cold chain is correctly tensioned when there
is no slack on the underside of the guide bar, the chain
is snug, and it can be turned by hand without binding.
4. Re-tension the chain whenever the ats on the drive
links hang out of the bar groove.
NOTE: During normal saw operation, the temperature
of the chain increases. The drive links of a correctly
tensioned warm chain will hang approximately 1.25
mm (0.05 inch) out of the bar groove. The tip of the
combination wrench can be used as a guide to help
determine the correct warm chain tension.
NOTE: New chains tend to stretch; check the chain
tension frequently and tension as required. This is the
same for a new tool.
5. Lift the tip of the guide bar up to check for sag.
6. Release the tip of the guide bar and turn the chain
tensioning dial clockwise. Repeat this process until
sag does not exist.
7. Hold the tip of the guide bar up and tighten the clutch
cover lock knob securely. The chain is correctly
tensioned when there is no sag on the underside of
the guide bar, the chain is snug, but it can be turned
by hand without binding. Ensure that the chain brake
is not set.
NOTE: If chain is too tight, it will not rotate. Loosen
the clutch cover lock knob by pressing in and slightly
rotating counter clockwise, then rotate the chain
tensioning dial counter clockwise. Lift the tip of the
guide bar up and retighten the clutch cover lock knob
securely. Ensure that the chain will rotate without
binding.
English (Original instructions)
A chain tensioned while warm may be too tight upon
cooling. Check the "Adjusting the chain tension" before
next use.

CHAIN MAINTENANCE

See gure 51 - 52.
Check that the switch is in the STOP "O" position before
you work on the saw.
Use only a low-kick-back chain on this saw. This
fastcutting chain provides kick-back reduction when
properly maintained.
For smooth and fast cutting, maintain the chain properly.
The chain requires sharpening when the wood chips are
small and powdery, the chain must be forced through the
wood during cutting, or the chain cuts to one side. During
maintenance of the chain, consider the following:
1. Improper ling angle of the side plate can increase the
2. Raker (depth gauge) clearance (A).
SHARPENING THE CUTTERS
See gure 53 - 56.
Parts of a cutter
(A) Cutting corner
(B) Side plate
(C) Depth gauge
(D) Toe
Be careful to le all cutters to the speci ed angles and to
the same length, as fast cutting can only be obtained when
all cutters are uniform.
1. Wear gloves for protection.
2. Tension the chain prior to sharpening.
31 31
CAUTION
WARNING
risk of a severe kick-back.
– Too low increases the potential for kick-back.
– Not low enough decreases cutting ability.
If the cutter teeth hit hard objects such as nails and
stones, or are abraded by mud or sand on the wood,
have the Ryobi service dealer sharpen the chain.
NOTE: Inspect the drive sprocket for wear or damage
when replacing the chain (B). If signs of wear or
damage are present in the areas indicated, have the
drive sprocket replaced by a Ryobi service dealer.
(E) Gullet
(F) Heel
(G) Rivet hole
(H) Top plate
NOTE: Refer to "Maintenance – adjusting the chain