Stihl 066 Instruction Manual - Page 40

Take Care of Guide Bar Chain type Pitch Minimum groove depth Rapid 3/8" 6.0 mm (0.24") 2 Rapid 0.404" 7.0 mm (0.27") If groove depth is less than specified: 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. 143BA026 KN 1 3 • Turn the bar over every time you sharpen the chain and every time you replace the chain this avoids one-sided wear, especially at nose and underside of the bar. Regularly clean 1 = oil inlet hole 2 = oilway 3 = bar groove. • Measure groove depth with scale on filing gauge* at nose of Duromatic bars in area used most for cutting on Rollomatic bars - *Special accessory 38 066