Ryobi RY3714 User Manual - Page 13

MAINTENANCE WARNING: Before inspecting, cleaning, or servicing the unit (except for carburetor adjustments), shut off engine or motor, wait for all moving parts to stop, and disconnect spark plug wire and move it away from spark plug or disconnect from power supply. Failure to follow these instructions can result in serious personal injury or property damage. WARNING: Always wear eye protection with side shields marked to comply with ANSI Z87.1, as well as hearing and head protection, when operating this equipment. Failure to do so could result in objects being thrown into your eyes and other possible serious injuries. WARNING: When servicing, use replacement parts that meet or exceed original product specifications. Use of any other parts could create a hazard or cause product damage. NOTICE: Periodically inspect the entire product for damaged, missing, or loose parts such as screws, nuts, bolts, caps, etc. Tighten securely all fasteners and caps and do not operate this product until all missing or damaged parts are replaced. Please contact customer service or a qualified service center for assistance. GENERAL MAINTENANCE Avoid using solvents when cleaning plastic parts. Most plastics are susceptible to damage from various types of commercial solvents and may be damaged by their use. Use clean cloths to remove dirt, dust, oil, grease, etc. WARNING: Do not at any time let brake fluids, gasoline, petroleumbased products, penetrating oils, etc., come in contact with plastic parts. Chemicals can damage, weaken, or destroy plastic, which could result in serious personal injury. WARNING: To avoid possible serious injury, never touch or adjust the chain while the motor is running. The chain is very sharp; always wear protective gloves when performing maintenance to the chain. REPLACING THE BAR AND CHAIN See Figures 10 - 15. Replacement Bar Part Number: 671834008 Replacement Chain Part Number: 690583003 WARNING: To avoid possible serious injury, stop engine or motor and remove the spark plug wire or disconnect from power supply before r­eplacing the bar, chain, or performing any maintenance operation.  Remove the bar nut and drivecase cover.  The bar contains a bar stud slot that fits over the bar stud.  The bar also contains a chain tensioning pin hole which fits over the chain tensioning pin.  Place the bar onto the bar stud so that the chain tension- ing pin fits into the chain tensioning pin hole.  Fit the chain over the sprocket and into the bar groove. The cutters on the top of the bar should face toward the bar tip, in the direction of the chain rotation.  Replace the drive case cover and reinstall the bar nut. Tighten the bar nut finger tight only; the bar must be free to move for tension adjustment.  Remove all slack from chain by turning the chain tensioning screw clockwise, assuring that the chain seats into the bar groove during tensioning.  Lift the tip of the bar up to check for sag. Release the tip of the bar, and turn the chain tensioning screw 1/2 turn clockwise. Repeat this process until sag does not exist.  Hold the tip of the bar up and tighten the bar nut ­securely.  Chain is correctly tensioned when there is no slack on the underside of the bar and the chain is snug, but can be turned by hand without binding. NOTE: If chain is too tight, it will not rotate. Loosen the bar nut slightly and turn adjusting screw 1/4 turn counterclockwise. Lift the tip of the bar up and retighten bar nut. WARNING: Check the chain tension frequently when operating the unit. Never touch or adjust the chain while the engine or motor is running. The chain is very sharp; always wear protective gloves when performing maintenance to the chain. 9 - English