Troy-Bilt TB32 Operation Manual - Page 5

MAINTENANCE AND REPAIR INSTRUCTIONS REPLACING THE TRIMMING LINE Only use the trimming line described in the Specifications section. Other types of trimming line may cause the engine to overheat or fail. WARNING: Never use metal-reinforced line, wire, chain or rope. These can break off and become dangerous projectiles. NOTE: Always use the correct line length when installing trimming line. The line may not release properly if the line is too long. Outer Spool Bolt Bump Knob Part 1 - Removing the Inner Reel 1. Hold the outer spool with one hand and unscrew the bump knob counterclockwise (Fig. 12). NOTE: The outer spool will remain attached to the unit. 2. Inspect the bolt inside the bump knob to make sure it moves freely. Replace the bump knob if it is damaged. 3. Remove the inner reel from the outer spool (Fig. 13). 4. Remove the spring from the inner reel (Fig. 13). 5. Use a clean cloth to clean the inner reel, spring, shaft and inner surface of the outer spool. 6. Check the indexing teeth and holding slots for wear (Fig. 14). If necessary, remove burrs or replace the inner reel and outer spool. Proceed to Part 2 - Winding New Trimming Line onto the Inner Reel. Outer Spool Shaft Part 2 - Winding New Trimming Line onto the Inner Reel • If using single line, refer to Winding Single Line. • If using split line, refer to Winding Split Line. • If using a prewound inner reel, proceed to Part 3 - Installing the Inner Reel. Fig. 12 Spring Fig. 13 Indexing Teeth Inner Reel Winding Single Line 1. Cut one 12-foot (3.7 m) length of new single trimming line. Fold the line in half to create a loop in the middle. 2. Insert the loop into the slot in the split wall (Fig. 15). Wind the line tightly in the direction shown on the bottom of the inner reel until about 6 inches (150 mm) of line remains. Keep the top half of the line above the split wall and the bottom half of the line below the split wall. 3. Insert the two 6-inch sections into the two .095 holding slots (Fig. 17). NOTE: Failure to wind the line in the direction indicated will cause the cutting head to operate incorrectly. Proceed to Part 3 - Installing the Inner Reel. Split Wall Fig. 14 Holding Slots Winding Split Line 1. Cut one 6-foot (1.8 m) length of new split line trimming line. Split each end about 6 inches (150 mm). 2. Using one split end, insert one line into the top hole and the other line into the bottom hole in the inner reel (Fig. 16). 3. Wind the line tightly in the direction shown on the bottom of the inner reel. The split wall will automatically divide the line. Wind the line until it is completely divided and about 6 inches (150 mm) of line remains. NOTE: Failure to wind the line in the direction indicated will cause the cutting head to operate incorrectly. 4. Insert the two 6-inch sections into the two .095 holding slots (Fig. 17). Proceed to Part 3 - Installing the Inner Reel. Slot Top Hole Bottom Hole Fig. 15 Fig. 16 Part 3 - Installing the Inner Reel 1. Pass the two line ends through the eyelets in the outer spool. Place the spring inside the inner reel. Insert the inner reel into the Holding outer spool. Push the inner reel and outer Slots spool together (Fig. 18). NOTE: The spring must be assembled on the inner reel before reassembling the cutting head. 2. While holding the inner reel and outer spool together, firmly pull the two line ends to release them from the holding slots. 3. While holding the inner reel and outer spool together, screw the bump knob on clockwise. Tighten the bump knob securely. Outer Spool Fig. 17 Spring Eyelets Split Wall Inner Reel MAINTENANCE AND REPAIR INSTRUCTIONS AIR FILTER MAINTENANCE WARNING: To avoid serious personal injury, always turn the unit off and allow it to cool before you clean or service it. Cleaning the Air Filter Failure to maintain the air filter properly can result in poor performance or can cause permanent damage to the engine. 1. Open the air filter cover by pressing the Air Filter Cover lock tab in and pulling out on the air filter cover (Fig. 19). Lock Tab 2. Remove the air filter (Fig. 19). 3. Wash the filter in detergent and water. Rinse the filter thoroughly and allow it to dry. 4. Apply enough clean SAE 30 motor oil to lightly coat the filter. 5. Squeeze the filter to spread and remove excess oil. 6. Replace the air filter into the air filter cover (Fig. 19). Air Filter NOTE: Operating the unit without the air filter WILL VOID the warranty. Fig. 19 7. Close the air filter cover by swinging it to the left and then pressing it down until the lock tab snaps into place (Fig. 19). IDLE SPEED ADJUSTMENT WARNING: The cutting attachment will spin during idle speed adjustments. Wear protective clothing and observe all safety instructions to prevent serious personal injury. NOTE: Careless adjustments can seriously damage the unit. An authorized service dealer should make carburetor adjustments. If, after checking the fuel mixture and cleaning the air filter, the engine still will not idle, adjust the idle speed screw as follows: 1. Start the engine and run for one minute to warm up. Refer to Starting and Stopping Instructions. Idle Adjustment Screw 2. Release the throttle trigger and let the engine idle. If the engine stops, insert a small Phillips screwdriver into the idle adjustment screw (Fig. 20). Turn the idle speed screw clockwise 1/8 of a turn at a time (as needed) until the engine idles smoothly. 3. If the engine appears to be idling too fast, turn the idle speed screw counterclockwise 1/8 of a turn at a time (as needed), to reduce idle speed. Checking the fuel mixture, cleaning the air filter and adjusting the idle speed should solve most engine problems. If not and all of the following are true: Fig. 20 • the engine will not idle • the engine hesitates or stalls on acceleration • there is a loss of engine power Have the carburetor adjusted by an authorized service dealer. MAINTAINING THE SPARK PLUG 1. Stop the engine and allow it to cool. Grasp the spark plug boot firmly and pull it from the spark plug. 2. Clean around the spark plug. Remove the spark plug from the cylinder head with a 5/8-inch socket, turning counterclockwise. WARNING: Do not sand blast, scrape or clean electrodes. Grit in the engine could damage the cylinder. 3. Inspect the spark plug. If the spark plug is cracked, fouled or dirty, replace it with a replacement part #753-06193, a Champion RDJ7J or an equivalent spark plug. 4. Use a feeler gauge to set the air gap at 0.025 in. (0.635 mm) (Fig. 21). 5. Install the spark plug in the cylinder head. Tighten the spark plug with a 5/8-inch socket, turning it clockwise until snug. NOTE: If using a torque wrench, torque to: 110-120 in.•lb. (12.3-13.5 N•m). Do not over tighten. 6. Reattach the spark plug boot. 0.025 in. (0.635 mm.) Fig. 21 Fig. 18 Bump Knob 5