Husqvarna MZ54 Owner Manual - Page 26

MAINTENANCE Pump Belt The belts are not adjustable. Replace belts if they begin to slip from wear. Replacing Pump Belt Park the mower on a level surface. Engage the park brake. Belt Removal From the top side of the deck: 1. Remove the deck belt (see Deck Belt Removal in this section of the manual). 2. Tilt seat forward to access fan covers. Remove both fan covers. 3. Place the belt over the right and left idler pulleys. 4. Place the belt on the engine pulley. 5. Use the breaker bar to hold the tension off the belt while removing the implement used as a brace in the plate. 6. Replace and secure clutch stop. 7. Reinstall the fan shields. 8. Reinstall the deck belt. (See Deck Belt Installation in this section of the manual). Cutting Blades For the best mowing results, it is important that blades are well sharpened and not damaged. Replace blades that have been bent or cracked when hitting obstacles. Let the service workshop decide whether a blade with large nicks can be repaired/ground or must be replaced. Balance the blades after sharpening. Check the blade mounts. From the underside of the mower: 3. Remove clutch stop to access the belt. 4. With a ½" breaker bar and using the square opening in the pump idler arm, shift the arm to create slack in the belt. CAUTION! Blades are sharp. Protect your hands with gloves and/or wrap blades with a heavy cloth when handling. The sharpening of blades should be carried out by an authorized service workshop. Blade replacement 1. Remove blade bolt by turning counter clockwise. 2. Install new or resharpened blade with stamped GRASS SIDE facing towards ground/grass (down) or THIS SIDE UP facing deck and cutter housing. 3. Seat the blade's opening firmly onto the cutter housing. 4. Tighten blade bolt securely. 5. Torque blade bolt to 45-55 ft/lbs (60-75 Nm). 5. With the idler arm in the slack position, slip a screwdriver, clevis pin or similar into the 3/8" hole in the plate that sits between the two fan covers. This will keep the idler in the extended position and allow removal of the breaker bar. 6. Remove belt from the engine and pump pulleys over the top of the fans. Belt Installation 1. If the pump is not locked in the extended position, repeat Steps 4 and 5 from the above instructions. 2. Slip the belt over the fans and route it between the idler pulleys. IMPORTANT INFORMATION Special blade bolt is heat treated. Replace with a Husqvarna bolt if required. Do not use lower grade hardware than specified. 26