Removing
1. Remove the gearbox as described in chapter 7, and then remove the clutch assembly as described in chapter 6.
2. Lock the flywheel by blocking its ring gear (pic. 15.2). Alternatively, install and bolt a strip of metal between the flywheel and engine block/crankcase.
Pic. 15.2. Block the flywheel ring gear using the special tool
Warning. Do not attempt to lock the flywheel using the locking tool described in paragraph 3.
3. Turn out bolts of fastening of a flywheel.
4. Remove the flywheel. Don't let it fall, it's very heavy. If the dowel pin on the end of the crankshaft is not damaged, remove it and store it in a safe place along with the flywheel.
Inspection
5. If there are deep scratches, cracks or other damage on the mating surface of the flywheel with the clutch, the flywheel must be replaced. However, sometimes they can be removed by grinding, consult your dealer or engine specialist.
B If there is severe wear or missing teeth on the ring gear, the ring gear must be replaced. This job is best left to a dealer or engine overhauler. The temperature to which a new ring gear must be heated in order to install it is very important. If it is not precisely maintained, the hardness of the teeth will be broken.
Installation
7. Clean the mating surfaces of the flywheel.
8. If thread locking compound is not applied to the threads of the new flywheel mounting bolts, apply appropriate compound to the threads of each bolt.
9. Verify that the dowel pin is in place. Install the flywheel on the crankshaft, focusing on the dowel pin, and screw in new bolts.
10. Lock the flywheel using the method used for removal. Then, working in a criss-cross pattern, evenly and progressively tighten the bolts to the prescribed torque.
11. Reinstall the clutch assembly (see chapter 6). Remove the locking tool and install the gearbox as described in chapter 7.