English / USA
Standard chain brake is activated by front hand guard
:When the hand guard is pushed toward the bar nose by the left hand or by inertia in certain kickback situations.
The chain is brought to a standstill and locked in position.
Always disengage chain brake before accelerating engine and before starting cutting work. The only exception to this rule is when you check operation of the chain brake.
High revs with the chain brake engaged (chain locked) will quickly damage the powerhead and chain drive (clutch, chain brake).
The chain brake is designed to be activated also by the inertia of the front hand guard
if the forces are sufficiently high. The hand guard is accelerated toward the bar nose – even if your left hand is not behind the hand guard, e.g. during a felling cut. The chain brake will operate only if it has been properly maintained and the hand guard has not been modified in any way.
Check operation of
Before starting work:
Open the throttle fully and then release the rear handle. The chain must stop moving within less than a second.
Check operation of
Before starting work: Run engine at idle speed, engage the chain brake (push hand guard toward bar nose). Open the throttle wide for no more than 3 seconds. The chain must not rotate. The hand guard must be free from dirt and move freely.
In case of any doubt about the above functions, contact your STIHL dealer for assistance.
Disengaging the chain brake
:Pull the hand guard toward the front handle.
MS 280 C | 39 |