RE-GLUING FLYWHEEL MAGNETS

[Short Circuit 27]

I know this subject has been addressed in several other threads, but I wanted to add my experience to all the excellent help I used on this website to help me with my dilemma.

 

I recently took my 14 hp Kohler engine flywheel to a machine shop to have them rebalance it along with the crankshaft, piston assembly, and rod. I got a call from the machine shop to tell me the magnets in the flywheel were loose and they couldn't balance it. When I went in to inspect the "damage", they informed me they hot tanked the flywheel, which to me was a mystery since there was no grease or oil on it to require degreasing.   Evidently, the hot tanking loosened the adhesive holding the magnets.

 

So after bringing home the mess, I set out to re-glue the magnets, but I wanted to reinstall them as precisely as I could to keep the original flywheel balance intact. So after doing some measuring with the magnets positioned in the flywheel, I came up with a solution to equally space the magnets precisely around the inside diameter of the flywheel when I re-glue them. I purchased two pieces of brass tubing, one square tubing and one round tubing, both with 7/32" outside dimension. Brass tubing is non-magnetic so the magnets have no affect on their installation or removal.

 

I cut the square tubing into lengths of 2 5/8", and the round tubing into lengths of 1 1/4". I placed the square tubing behind the magnets to hold them out from the inner edge of the machined surface in the flywheel. This will place them in their original position to align them with the alternator stator assembly when the flywheel is installed on the crankshaft.

 

The 7/32" round tubing spacers are used between the individual magnets to position them equally around the flywheel inside diameter. 7/32" diameter will do just that with no gaps in the spacing. The tubing is just finger tight when installed, and easily removable.

 

After thorough cleaning, I glued the first magnet with JB Weld Original grey formula, and clamped it with a paper clamp as suggested in the hilarious video seen in another thread on this subject. Then after waiting overnight for the first magnet to set up, I glued the 5 remaining magnets to the flywheel with JB Weld Original grey formula, spacing them with the pieces of tubing as described earlier The brass spacers made the positioning very easy and precise!

 

I have attached some pics for your inspection.

 

 

 

Unclamped magnet is the first one installed

 

 

I bought a fresh pack for my satisfaction...

 

[oliver2-44 9,756]

Great ideas, Gotta Love JB Weld!

[N3PUY 1,031]

Did you get the "+" and "-" correct?

[Short Circuit 27]

On July 7, 2016 at 6:40 PM, N3PUY said:

Did you get the "+" and "-" correct?

Sorry I forgot to mention the polarity test you must do to determine the correct poles and orientation. There are three 

'north pole" magnets and three "south pole" magnets. The north pole magnets have the north pole in the center and a south pole on each end.

The south pole magnet has a south pole in the center, and north poles at the ends. These must be alternated as you place them around the radius of the flywheel. The other threads explain this in detail.

Thanks for reading.

[N3PUY 1,031]

5 minutes ago, Short Circuit said:

Sorry I forgot to mention the polarity test you must do to determine the correct poles and orientation. There are three 

'north pole" magnets and three "south pole" magnets. The north pole magnets have the north pole in the center and a south pole on each end.

The south pole magnet has a south pole in the center, and north poles at the ends. These must be alternated as you place them around the radius of the flywheel. The other threads explain this in detail.

Thanks for reading.

Yeah

That's what I meant ..... "N" + "S"  !

BTW ... NICE FONT! 

[312Hydro 474]

Thanks for the education fellas! I didn't know this and I'll file it away for future use. There's something to learn for me every time I read a post.