Stihl HT 101 Instruction Manual - Page 32

390BA050 KN 273BA006 KN English Taking Care of the Guide Bar 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. 2 Cleaning the Air Filter If there is a noticeable loss of engine power 4 1 2 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 Chain pitch 3/8" P Minimum groove depth 0.20" (5.0 mm) If groove depth is less than specified: N Turn the choke knob to g N Take out the screw (1) and remove the filter cover (2). N Clean away loose dirt from around the filter. N Grip the filter element (3) at the cutout (arrow) in the filter housing (4) and remove it. N Fit a new filter element. As a temporary measure you can knock it out on the palm of your hand or blow it out with compressed air. Do not wash. N Replace damaged parts. Installing the filter N Install the filter element in the filter housing and fit the cover. N Insert the screw and tighten it down firmly. 30 HT 100, HT 101, HT 130, HT 131