More problem!!! Aaarrrggghhh!!!

[Nibbler]

Today i found out that the shaft on my Yanmar L100 is 25 mm not 1 inch...
Which gives me 0,4 mm extra clearance.
So the Comet clutch is very loose on the shaft. Both up and down and back and forth. Worst is the movement back and forth, which will unscrew the bolt in no time... This i found out just 10 minutes after fitting a brand new 15A generator...

Is the engine scrap or is there a way around this problem? My father who is a retired marine engineer didn't give it a good prognosis.

[dieselbikin]

Seek and ye shall find!
Comet part: 204799A 30MM-25MM BUSHING — 94C, 102C, 108C

Its toward the bottom of the page.
http://www.hoffcocomet.com/comet/indust ... clutch.asp

[dieselbikin]

oops, you needed 1".
Call these guys, they are the official comet parts supplier. They have been helpful in the past:
http://www.mfgsupply.com/SnowComet.html
Also, call the comet tech line listed on comets website. Hard to get through, but very helpful once you do.
http://www.hoffcocomet.com/comet/contact-comet.asp

[Diesel Dave]

Slap some bearing fit around it and let it set.

Goes rock hard and takes out the play.

[Nibbler]

Thanks guys for taking some time helping me out!!!

I thought that the L100 came with a 1 inch shaft as standard...
If i known that i would have bought the serie 72 converter insteed of the serie 40.

What is bearing fit?

[Diesel Dave]

It's a Loctite or similar product used to take up the slack between bearings and casings/shafts

Look here:

http://www.glue-shop.com/fivestar/metal-RETAINER.htm

The specs on the 9-660 product says it can fill a .3 mm gap so I reakon this is right on the money for the difference between your 1" (25.4mm) and 25mm gap.

It can be the devils own job to remove afterwards but it's ok if you can get the parts hot with a blowlamp to break the bond.

Cheers
Dave

[Nibbler]

Problem probably solved!!!

In the beginning of the project i consulted this older man that still has his own company about some questions of shafts and bearings, he´s an absolute expert when it comes to impossible fixes, bearings, and shafts and machine work. He got really intrested in the project and promised to help if something went wrong. Buy the way, he collects hot bulb engines and has just one day off every year and that´s christmas day.

So now the shaft is ready. Through some weird process he have added material on the shaft. Some strange powder (electrostatic process???) was used and probably some ceremonys including goats and witchcraft. Some work with the lathe and voila.

This information can be useful for any future mishaps any of you might run into.

[LocomotiveBreath]

Sounds great, tell your friend there is a hot bulb engine powered motorcycle on YouTube if he has not seen it yet.

See: http://www.youtube.com/watch?v=l681_yu7 ... annel_page

I really like this old bike.

See: http://www.youtube.com/watch?v=jbbsDds1 ... annel_page

[smokyjoe]

Sounds like you've got it fixed the right way! Great to have a resource like that guy.

I've fitted odd-sized shafts and worn shafts by making a sheetmetal or shimstock sleeve to take up the difference by rolling it on a piece of round stock smaller than the shaft. If the shaft is worn I've turned down the shaft and then fitted a tubular shim. Sometimes luck will prevail and a piece of tubing can be found to work. Of course this usually requires a thicker key to be made.

I've the same problem with a Deutz diesel engine I'm fitting to an old Sears and Roebuck garden tractor, 3/4 inch pulley and ???mm crankshaft.

Of course sleeves can be bought at farm and machinery parts houses to fit "standard" combinations but here in the US for some reason "standard" shafts, pulleys and sprockets are usually fractional inch sizes but most machinery is now designed here with metric "innards" but the shaft to the outside world is by the king's inch! Go figure.

[andrewaust]

Great to see things have been sorted Nibbler.


A