Ryobi RY40800 Manual Del Operador página 175

POWER HEAD IDLE SPEED ADJUSTMENT
(GAS POWER HEADS ONLY)
If the chain turns at idle, the idle speed screw needs adjusting
on your gas power head engine. Turn the idle speed screw
counterclockwise to reduce the idle RPM and stop the chain
movement. Refer to your power head Operator's Manual for
more details. If the chain still moves at idle speed, contact
a service dealer for adjustment and discontinue use until
the repair is made.
WARNING:
The chain should never turn at idle when using a gas
power head. Turn the idle speed screw "T" counter-
clockwise to reduce the idle RPM and stop the chain, or
contact a service dealer for adjustment and discontinue
use until the repair is made. Serious personal injury could
result from the chain turning at idle.
CHAIN TENSION
See Figures 16 - 17.
 Stop the engine or motor and remove the spark plug
wire or disconnect from power supply before setting the
chain tension. Make sure the guide bar nut is loose to
finger tight, turn the chain tensioning screw clockwise to
tension the chain. Refer to Replacing the Bar and Chain
for additional information.
A cold chain is correctly tensioned when there is no slack
on the underside of the guide bar and the chain is snug,
but can be turned by hand without binding.
 The chain must be re-tensioned whenever the flats on
the drive links hang out of the bar groove.
 During normal operation, the temperature of the chain will
increase. The drive links of a correctly tensioned warm
chain will hang approximately .050 in. (1.25 mm) out of
the bar groove.
NOTE: New chains tend to stretch; check chain tension
frequently and tension as required.
NOTICE:
A chain tensioned while warm may be too tight upon
cooling. Check the "cold tension" before next use.
MAINTENANCE
CHAIN OILER
See Figure 18.
 Use premium bar and chain lubricant. It is designed for
chains and chain oilers and is formulated to perform over
a wide temperature range with no dilution required.
 Remove the cap and carefully pour approximately 8 oz.
of bar and chain lubricant (not provided) into the chain
oiler tank.
 Replace the cap and tighten securely.
 Check and refill the chain oiler tank every hour when using
an electric power head or every time the engine is fueled
when using a gas power head.
NOTE: Do not use dirty, used, or otherwise contaminated
lubricants. Damage may occur to the oil pump, bar, or
chain.
CHAIN MAINTENANCE
See Figure 19.
WARNING:
The chain is very sharp; always wear protective gloves
when performing maintenance to the chain.
Use only the replacement low kickback chain specified for
this unit.
For smooth and fast cutting, the chain needs to be main-
tained 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:
 Improper filing angle of the side plate can increase the
risk of a severe kickback.
 Depth gauge (or raker clearance) setting determines the
height the cutter enters the wood and the size of the wood
chip that is removed. Too much clearance increases the
potential for kickback. Too little clearance decreases the
size of the wood chip thus decreasing the chain's cutting
ability.
 If cutter teeth have hit hard objects such as nails and
stones, or have been abraded by mud or sand on the
wood, have service dealer sharpen chain.
9 — English