Why does my flywheel key keep breaking?
if key is too large or inserted improperly, the key will keep the flywheel from fully seating on the crankshaft, even though the retaining nut is quite tight. other causes are burrs on either of the matching surfaces or wear. if the crankshaft is too small or worn or the flywheel hole is too large.
Why is the flywheel important to the crankshaft?
The flywheel contributes to the uniform rotation of the crankshaft and helps the engine overcome loads when starting the automobile from rest and also during operation. Even though the power impulses of a multicylinder engine follow each other or overlap, additional smoothing out of the power impulses is desirable.
Where do you put the key on a flywheel?
The key should only be for locating the flywheel correctly before bolting it on. The fly wheel should be held on to the crank by pressing it onto the snout of the crank. There are 2 possible problems.
Why do I need a flywheel key on my Tiller?
On engines with starter motors, lights or other devices, magnets mounted inside and outside are at the heart of the electrical system. Finally, if a lawn mower or tiller blade hits a rock or curb, the flywheel key can sometimes absorb the damage, reducing repair costs significantly.
How are the crank throws arranged in a four cylinder engine?
Consequently the crank throws have to be sited in a pattern consistent with the engine’s firing order. In a four-cylinder in-line engine, the crank throws are arranged with the centre two throws at 180 to the end two throws.
What causes a flywheel key to shear?
The fly wheel should be held on to the crank by pressing it onto the snout of the crank. There are 2 possible problems. Either you’re not torquing the flywheel bolt properly or the taper on the flywheel or crank is bad.
The key should only be for locating the flywheel correctly before bolting it on. The fly wheel should be held on to the crank by pressing it onto the snout of the crank. There are 2 possible problems.
What can you do with tapered crankshaft and flywheel?
This can also be used to bind a flywheel onto a crank without needing a woodruff key, allowing complete control over setting timing, for example if you wanted to swap ignitions between various makes of bikes. I start the teardown to reveal the crank taper in my normal manner with the same tools I had on the road.
How to inspect flywheel and key for Briggs and Stratton?
Always check for damage by removing the flywheel to inspect the key and the keyway, the key’s slot on the crankshaft. The soft metal key must eliminate play between the flywheel and crankshaft.