Poulan S1970 User Manual - Page 7

Cutters Depth Gauge Guide Bar Drive Links 7. Place chain over and behind clutch retainer, fitting the drive links in the clutch drum sprocket. 8. Fit bottom of drive links between the teeth in the sprocket in the nose of the guide bar. 9. Fit chain drive links into bar groove. 10. Pull guide bar forward until chain is snug in guide bar groove. Ensure all drive links are in the bar groove. 11. Now, install clutch cover making sure the adjusting pin is positioned in the lower hole in the guide bar. Remember this pin moves the bar forward and backward as the screw is turned. Chain Adjustment Bar Nuts Adjusting Screw Tool (Bar Tool) Adjusting the tension: Chain tension is very important. Chains stretch during use. This is especially true during the first few times you use your saw. Always check chain tension each time you use and refuel your saw. 1. Loosen bar nuts until they are finger tight against the clutch cover. 2. Turn adjusting screw clockwise until chain solidly contacts bottom of guide bar rail. Adjusting Screw Clutch Cover Adjusting Pin Lower Hole Guide Bar 12. Install bar nuts and finger tighten only. Once the chain is tensioned, you will need to tighten bar nuts. CHAIN TENSION (Including units with chain already installed) WARNING: Wear protective gloves when handling chain. The chain is sharp and can cut you even when it is not moving. NOTE: When adjusting chain tension, make sure the chain brake nuts are finger tight only. Attempting to tension the chain when the chain brake nuts are tight can cause damage. Checking the tension: Use the screwdriver end of the chain adjustment tool (bar tool) to move chain around guide bar. If the chain does not rotate, it is too tight. If the chain is too loose, it will sag below the bar. 3. Using bar tool, roll chain around guide bar to ensure all links are in bar groove. 4. Lift up tip of guide bar to check for sag. Release tip of guide bar, then turn adjusting screw 1/4 turn clockwise. Repeat until sag does not exist. Adjusting Screw -- 1/4 Turn 5. While lifting tip of guide bar, tighten bar nuts securely with the bar tool. Bar Nuts 6. Use the screwdriver end of the bar tool to move chain around guide bar. 7. If chain does not rotate, it is too tight. Slightly loosen bar nuts and loosen chain by turning the adjusting screw 1/4 turn counterclockwise. Retighten bar nuts. 8. If chain is too loose, it will sag below the guide bar. DO NOT operate the saw if the chain is loose. WARNING: If the saw is operated with a loose chain, the chain could jump off the guide bar and result in serious injury. 7