Stihl HT 101 Product Instruction Manual - Page 30

English Chain at operating temperature The chain stretches and begins to sag. The drive links must not come out of the bar groove - the chain may otherwise jump off the bar. Retension the chain - see "Tensioning the Saw Chain". The chain contracts as it cools down. If it is not slackened off, it can damage the gear shaft and bearings. After long period of full-throttle operation Allow engine to run for a short while at idle speed so that engine heat can be dissipated by the flow of cooling air. This protects engine-mounted components (ignition, carburetor) from thermal overload. After Finishing Work N Slacken off the chain if you have retensioned it at operating temperature during cutting work. Always slacken off the chain after finishing work. The chain contracts as it cools down. If it is not slackened off, it can damage the gear shaft and bearings. Storing your saw for a short period Wait for the engine to cool down. Drain the fuel tank. Store the machine in a dry location. Check the tightness of all accessible screws and nuts (not adjusting screws) at regular intervals and retighten if necessary. Storing for a long period See chapter on "Storing the Machine" Taking Care of the Guide Bar 2 390BA050 KN 1 3 N Turn the bar over - every time you sharpen the chain and every time you replace the chain - this helps avoid one-sided wear, especially at the nose and underside of the bar. N Regularly clean the oil inlet hole (1), the oilway (2) and the bar groove (3). N Measure the groove depth - with the scale on the filing gauge (special accessory) - in the area used most for cutting. Chain type Picco Rapid Chain pitch Minimum groove depth 3/8" P 0.20" (5.0 mm) 1/4" 0.16" (4.0 mm) If groove depth is less than specified: N Replace the guide bar. The drive link tangs will otherwise scrape along the bottom of the groove - the cutters and tie straps will not ride on the bar rails. 28 HT 100, HT 101, HT 130, HT 131