General Maintenance; Lubrication - Ryobi RCS4240B Mode D'emploi

■ Underbuck the branch 1/3 through for your first cut.
■ Overbuck the branch to drop it.
■ Finish by cutting smoothly and neatly against the main
member so the bark will grow back to seal the wound.
WARNING
If the limbs to be pruned are above chest height, hire a
professional to perform the pruning.
CUTTING SPRING POLES
See figure 35.
A spring pole is any log, branch, rooted stump, or sapling
which is bent under tension by other wood so that it springs
back if the wood holding it is cut or removed. On a fallen
tree, a rooted stump has a high potential of springing back
to the upright position during the bucking cut to separate
the log from the stump. Watch out for spring-poles; they
are dangerous.
WARNING
Spring poles are dangerous and could strike the
operator causing the operator to lose control of the
chainsaw. This could result in severe or fatal injury to
the operator.
MAINTENANCE
WARNING
When servicing, use only identical replacement parts.
Use of any other parts may create a hazard or cause
product damage.
WARNING
Always wear safety goggles or safety glasses with side
shields when operating this tool. If operation is dusty,
also wear a dust mask.

GENERAL MAINTENANCE

Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types of
commercial solvents and may be damaged by their use.
Use clean cloths to remove dirt, dust, oil, grease, etc.
English (Original instructions)
Do not at any time let brake fluids, gasoline, petroleum-
based products, penetrating oils, etc., come in contact
with plastic parts. Chemicals can damage, weaken, or
destroy plastic which may result in serious personal
injury.

LUBRICATION

All of the bearings in this product are lubricated with a
sufficient amount of high grade lubricant for the life of
the unit under normal operating conditions. Therefore, no
further lubrication is required.
REPLACING THE GUIDE BAR AND CHAIN
See figure 36 - 45.
Never start the engine before installing the guide bar,
chain, drivecase cover, and clutch drum. Without all
these parts in place, the clutch can fly off or explode,
exposing the user to possible serious injury.
To avoid serious personal injury, read and understand
all the safety instructions in this section.
■ Always place the switch in the stop "O" position before
■ Make sure the chain brake is not set by pulling the
■ Wear gloves when handling the chain and bar. These
■ Press in on the clutch cover lock knob and rotate
■ Remove the bar and chain from the mounting surface.
■ Remove the old chain from the bar.
■ Lay out the new saw chain in a loop and straighten any
■ Place the chain drive links into the bar groove.
■ Position the chain so there is a loop at the back of
■ Hold the chain in position on the bar and place the loop
33
WARNING
DANGER
WARNING
you work on the saw.
chain brake lever/hand guard towards the front handle
to the run position.
NOTE: Use only replacement bars and chains
specified by the manufacturer or the equivalent.
components are sharp and may contain burrs.
counter clockwise until the clutch cover can be
removed.
kinks. The cutters should face in the direction of chain
rotation. If they face backwards, turn the loop over.
the bar.