8
Chain brake
The chain brake is used to stop chain rotation in case of bounce
of the chain saw, and cannot be used to prevent or reduce bounce.
Even if the chain brake is applied, the operator should keep the
quick response and adopt the correct cutting method, like in the
case with no chain brake.
The response time of the chain brake will gradually increase
even if the chain saw is properly operated and maintained.
The following operations may affect the capability of the chain
brake to protect the operator.
1.
The chain saw is controlled improperly and contacts with
the body of the operator. The speed of bounce is too high,
and prompt braking cannot be realized even by the well-
maintained brake.
2. The hands of the operator are not placed in the correct
positions of hand guards, resulting in failure of activation
of the brake.
3.
The stop time of the brake is prolonged as a result of
improper maintenance, causing poor braking effects.
4.
The chain braking time is prolonged as a result of
dust, grease, oil, resin and other debris in the working
mechanisms.
5.
The stop time of the chain brake is prolonged as a result of
fatigue and wear of the brake spring and wear of the shoe
pad, clutch shell and crankshaft hinge joint.
6.
The chain brake may fail if the front baffle and brake strap
are damaged.
