Stihl MS 180 Product Instruction Manual - Page 42

English Taking Care of the Guide Bar 2 Chain type Picco Rapid Picco Rapid Rapid Chain pitch 1/4" P 1/4" 3/8" P 3/8"; 0.325" 0.404" Minimum groove depth 0.16" (4.0 mm) 0.16" (4.0 mm) 0.20" (5.0 mm) 0.24" (6.0 mm) 0.28" (7.0 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. 1 3 Shroud Removing the shroud N Use a suitable tool to open the catch by turning it 90° to the left N Lift off the shroud Refitting the shroud 143BA026 KN 207BA039 KN N Turn the guide 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. Install parts in reverse order. 40 MS 170, MS 170 C, MS 180, MS 180 C