Newbie question about oil seals and flywheel

[elittle]

So if I take this saws flywheel off to swap out the oil seal, can I just put the flywheel back on? Or do I have to worry about putting it back on exactly how it was before I took it off? Will that screw up the timing by removing it is what I'm asking i guess.

This is a cheap saw i bought to try this kind of stuff with so I'm not worried about destroying it on accident. Hopefully not though.

Thanks for any help.

 

[Mad Professor]

So if I take this saws flywheel off to swap out the oil seal, can I just put the flywheel back on? Or do I have to worry about putting it back on exactly how it was before I took it off? Will that screw up the timing by removing it is what I'm asking i guess.

This is a cheap saw i bought to try this kind of stuff with so I'm not worried about destroying it on accident. Hopefully not though.

Thanks for any help.

Would be good to know what saw you are working on and post some pictures.

Flywheel has a keyway that fits the keyway/key on the crank; one way is only way..

You may need tools to act as a piston stop and flywheel puller. Several ways to do both.

You'll also need tools to pull and install a seal, without marring the crank or case.

Lots of reading on those here.

 

[elittle]

It's a mcculloch mac 130. It's not apart right now, I'm waiting for for seals and the puller and then I need to order some kind of install tool or use a socket to do it. I'll post photos when I have it apart in a couple days.
Edit: i have the piston stop and I'm still watching videos on removing the flywheel, I'll probably get a whatever tool I need to do that also.
This is an addiction. With all the tools I'll need more saws!

 

[cdahl383]

The flywheel should be keyed onto the crank. There is a keyway in the crankshaft that is cut out for a woodruff key. The flywheel can only fit on one way. Should be able to just put it back on and be done.

Some saws have threaded holes to use a puller. Others don't. On the smaller saws I've taken apart, I've used a large flathead screwdriver to pry behind the flywheel gently while using a brass drift and hammer to hit the end of the crankshaft to pop it loose. Be sure to put the nut back on the end of the crank so you don't mess up the threads. Some are more difficult than others, just depends.

Larger saws I've taken apart tend to have threaded holes in the flywheel itself to use a puller on. The important thing is to put the nut back on the end of the crank so you don't distort the end of the crank or mess up the threads.

On ones that are really stuck, I've found spraying a little Kroil around the crankshaft and letting it seep down into the key area sometimes helps. Leave the saw on its side and let the Kroil loosen up any crud/rust/build up.