Ryobi RY4CCS User Manual - Page 15

MAINTENANCE 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, lubricant, grease, etc. WARNING: Do not at any time let brake fluids, gasoline, petroleum-based products, penetrating lubricants, etc., come in contact with plastic parts. Chemicals can damage, weaken or destroy plastic which can result in serious personal injury.  Insert the bump knob and spool assembly through the opening in the string head housing.  Align the slots on the lower string head housing with the tabs on the upper string head housing.  Push the housing together until the tabs snap into place. NOTE: Hold the spool by the knob while completing the installation.  Install line as described in Line Replacement. IDLE SPEED ADJUSTMENT See Figure 18. LINE REPLACEMENT See Figures 14 - 15. Use only .095 in. trimmer line. Use original manufacturer's replacement line for best performance.  Stop the engine and disconnect the spark plug wire.  R otate the bump knob clockwise as necessary to align the arrows on the bump knob with the arrows on the string head housing.  Cut one piece of trimmer line 18 ft. long. Insert the line into the eyelet on the string head housing. Push until the end of the line comes out the other side of the housing. Pull the line until equal amounts of line appear on both sides of the housing. NOTE: Line may jam if more than 18 ft. is loaded.  Either by hand or using the Speed Winder™, rotate the bump knob clockwise to wind the line on the spool until approximately 6 in. of line is showing on each side. NOTE: For best results, after every five to seven revolutions of the Speed Winder™, pull both line ends taut for best loading results and to help prevent line from tangling.  Push the bump knob down while pulling on line(s) to manually advance the line. CLEARING LINE JAM AND/OR REPLACING BUMP KNOB See Figures 16 - 17.  Stop the engine and disconnect the spark plug wire.  Depress the tabs on the side of the string head housing to remove the lower string head housing. NOTE: The housing is spring loaded and will self eject when the tabs are depressed. It is not necessary to remove the upper string head housing from the drive shaft.  Push the spool and bump knob through the string head housing and remove the string from the spool.  If replacing the bump knob, remove the old knob from the spool. Align the knob ribs with the spool slots and place the new bump knob onto the spool. If you are not replacing the bump knob, skip this step. WARNING: The cutting head will move when adjusting the idle speed. Wear all protective clothing and keep all bystanders, children, and pets at least 50 ft. away. Make adjustments with the unit supported by hand so that the cutting head does not contact the ground or any object. Keep all parts of your body away from the cutting head and muffler. Failure to follow these instructions could result in serious personal injury. If the cutting attachment turns at idle, the idle speed screw needs adjusting on the engine. Turn the idle speed screw counterclockwise to reduce the idle RPM and stop the cutting attachment movement. If the cutting attachment still moves at idle speed, contact a service dealer for adjustment and discontinue use until the repair is made. WARNING: The cutting attachment should never turn at idle. Turn the idle speed screw counterclockwise to reduce the idle RPM and stop the cutting attachment, or contact a service dealer for adjustment and discontinue use until the repair is made. Serious personal injury could result from the cutting attachment turning at idle. CLEANING THE AIR FILTER See Figures 19 - 20. For proper performance and long life, keep air filter screen clean.  Remove the air filter cover. To remove, push up on the latch at the bottom of the cover and gently pull the cover up.  Remove the air filter.  Clean the foam filter element with warm soapy water. Rinse and let dry. NOTE: If the foam filter element is damaged, it should be replaced.  Apply a light coat of engine lubricant to the foam filter element, then squeeze it out. 11 - English