Jonsered CS 2117 EL, Operator'S Manual

Page: 11 / 20

ENGLISH
9
• The chain brake may be activated manually or by the force of
inertia depending on the strength of the kickback and the po-
sition of the saw in relation to the object which made contact
with the kickback danger zone.
- If the kickback is suffi ciently violent and the left hand
is too far from the kickback guard, the chain brake is
activated by the INERTIA of the chain brake against the
force of the kickback.
- In the event of smaller kickbacks or when the left hand
is near the kickback guard, the chain brake is activated
manually with the left hand.
• When the chain saw is turned on its side and the operator is
holding the side of the front handle, the kickback guard will
not strike the left hand in the event of a kickback and will thus
not activate the chain brake. In a situation of this type, inertia
is the only thing that can activate the chain brake, but like
manual activation, it will not work in every situation.
Kickback guard inspection
• Inspect kickback guard for visible defects, such as cracks.
• Move kickback guard back and forth to ensure that it moves
freely without being loose.
Manual chain brake function check
• Check chain brake daily or every time the saw is used. Hold-
ing the running saw fi rmly with the left hand on the front
handle and the right hand on the rear handle, twist your left
wrist, pushing the kickback guard to activate the chain brake
without letting go of the front handle. The chain should stop
instantaneously. If the chain brake does not perform as
required, have it serviced by authorized personnel.
Inertia chain brake function check
• Hold the running saw level with the guide bar approximately
45 cm above a stump or other solid wooden object.
Release the power trigger.
• Release the front handle, letting
the chain saw pivot in your right
hand as the guide bar falls down
and strikes the stump. The brake
should activate when the bar
nose hits the stump.
Your chain saw is equipped with a chain brake designed to stop
the chain instantaneously in the event of a kickback. A chain brake
can reduce the risk of accident, but only the operator can prevent
accidents from happening. Be extremely careful when operating
a chain saw and do not allow the kickback danger zone to make
contact with anything.
• The chain brake (A) is activated either manually (with the left
hand) or by the force of inertia (the inertia of the kickback guard
resisting the motion of the saw from the force of the kickback).
However it is activated, the kickback protection mechanism
works in the opposite direction to the force of the kickback. The
saw incorporates a slip clutch which protects the saw against
overload. If the chain stops while the motor is running, the saw
is overloaded. Ease up on the cutting pressure until the chain
starts running again. If the saw jams in the tree, stop the saw
immediately and free it.
• The chain brake is also activated when the kickback guard (B)
is pushed forward. This releases a springloaded mechanism
which jerks the brake band tightly around the brake drum.
• The purpose of the kickback guard is not only to activate the
chain brake. Its other important function is to reduce the danger
of contact with the chain in the event that the operator loses his
grip on the front handle.
• Use the chain brake as a «parking brake» when carrying the
chain saw around or putting it down for short periods! Besides
automatic activation in the event of a kickback, the chain brake
may also be activated manually and must be activated in the
event of any inadvertent contact with a rotating chain.
• An activated chain brake is released by pulling the kickback
guard back towards the front handle.
• As pointed out on page 8, a kickback can be extremely violent
and lightning-fast. Most kickbacks are small and do not activate
the chain brake. When this happens, it is important to maintain
a fi rm grip on the saw and not let go.
CHAIN BRAKE WITH KICKBACK GUARD