new seals now crank is tight

ok i have a new crank with new seals and bearings. should the crank spin freely?

with the case apart it spins fine but when i put the case on with the case screws tight ,the crank is very hard to spin.if i loosen the case screws then it turns easy.

i am thinking that the seals are new so its grabing onto the crank.

Re: new seals now crank is tight

Did you lubricate your seals?

new seals now crank is tight

Your bearings are probably off a bit.

Re: new seals now crank is tight

What type engine? I doubt your crank is bent that much. I second the lube with heavy grease on seals

Re: new seals now crank is tight

i didnt grease the seals .ill try that thanks

Re: new seals now crank is tight

I'm with Brennan make sure your bearings are centered if they are crooked it will spin when the case is loose and then get tough when you crank the case down, what type of engines is it?

Re: new seals now crank is tight

e50

Re: new seals now crank is tight

Yeah dude, try to reseat your bearings. My dollars are on that being the problem.

Re: new seals now crank is tight

i found the problem.it was the crank seal was too close to the crank so when i went to make it tight it would squish the seal into the crank.

Re: new seals now crank is tight

Bet that would have caused a world of heartache if you hadn't caught it.

Re: new seals now crank is tight

the seal is rubbing classic

new seals now crank is tight

I don't know about Mopeds, but when i was a tech for Kawasaki we used to heat the cases to seat the bearings in all the way. When I worked on jet engines we'd put the bearings in dry ice to get them to fall in the turbine sections fully.

new seals now crank is tight

On this particular engine that isn't necessary. The only heating you need to do is to heat up the bearings before you slide them onto the crank shaft and the drive shaft. Makes life way easier. the case splits horizontally, so when you close it up it grabls the bearings and seals. See here

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