McCulloch PRO MAC 610 - Operating Instructions; CHAIN BRAKE Operation

15. While holding the nose of the bar up, tighten the retaining
nuts securely.
16. Install and tighten the nut that secures the CHAIN BRAKE
lever/handguard to the CHAIN BRAKE lever.
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 CHAIN 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.