McCulloch Mac 120 - Chainsaw Operation; Chain Brake Operation and Testing; Starting and Stopping Procedures

OPERATING INSTRUCTIONS
CHAIN BRAKE OPERATION
Your chain saw is equipped with a CHAIN BRAKE that
reduces the possibility of injury due to "kickback." The
brake is actuated if pressure is applied against the lever
when. as in the event of "kickback," the operator's hand
strikes the lever. When the brake is actuated, chain move-
ment stops abruptly.
CAUTION: Purpose of the CHAIN BRAKE is to reduce the
possibility of injury due to "kickback" but it can not provide
the measure of protection intended if the saw is operated
carelessly.
The CHAIN BRAKE is disengaged (the chain can move) when
the brake lever is pulled back and locked. ®
The CHAIN BRAKE is engaged (chain is stopped) when the
brake lever is in the forward position. @
When the brake has been tripped and engaged (chain stops)
immediately release the throttle trigger to prevent damage to
engine or clutch.
If the CHAI N BRAKE has been actuated and the engine is
idling, grasp the brake lever firmly and pull back to the locked
position while controlling the saw with a hand grasping the
rear handle. Be careful not to squeeze the throttle trigger.
NOTE: Do not attempt to start or operate the engine with the
brake engaged (chain is stopped). Do not allow the engine to
idle for long periods of time when the brake is engaged as
this tends to build up heat in the sprocket bearing.
Before cutting with your saw, test the CHAIN BRAKE as
follows:
1. Place the saw on a firm flat surface.
2. Follow the correct procedures to start the engine.
3. Grasp the rear handle firmly with the right hand. @
4. With the left hand, hold the front handle (not the CHAIN
BRAKE lever) firmly.@
5. Squeeze the throttle trigger so that the chain begins to
move, then activate (push forward) the CHAIN BRAKE
lever. @
CAUTION: Activate the CHAIN BRAKE SLOWLY and ®
DELIBERATELY. Be careful to keep chain from touching 34
surface: don't let saw tip forward.
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