Stihl MS 193 C-E Product Instruction Manual - Page 35

Releasing the chain brake N Pull the hand guard back toward the front handle. NOTICE 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. 151BA005 KN 151BA006 KN Check operation of chain brake Before starting work: Run engine at idle speed, engage the chain brake (push hand guard toward bar nose). Accelerate up to full throttle for no more than 3 seconds - the chain must not rotate. The hand guard must be free from dirt and move freely. Chain brake maintenance The chain brake is subject to normal wear. It is necessary to have it serviced and maintained regularly by trained personnel, such as your STIHL servicing dealer, at the following intervals: Full-time usage: Part-time usage: Occasional usage: every 3 months every 6 months every 12 months English Information Before You Start The three positions of the Master Control lever: STOP Stop 0 - engine off - the ignition is switched off. Normal run position F - engine runs or can fire. To move the Master Control lever from F to n, press down the throttle trigger lockout and squeeze the throttle trigger at the same time. Starting throttle position n - this position is used to start a warm engine. The Master Control lever moves to the normal run position as soon as the throttle trigger is squeezed. MS 193 C 33