General Category => Engine & Transmission => Topic started by: mywaymfg on April 06, 2012, 03:02:31 PM
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Ok, I had a world of frustration today. I got my motor together and everything got tight I looked everywhere for the problem and could not put my finger on it finally after pulling things apart again it seems the motor pulley is tightening into the motor case. Should there be a space between bearing and pulley working from a phone as I do I can't download manuals
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Did you put new bearings in? If so, are they seated? When you assembled the engine, did you put the crank assembly together and check rotation before adding the rod, piston, and cylinder? I seem to recall that the motor pulley tightens right up to the oil seal bushing. You put this in, right?
Rick
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I did put new bearings in 20 yrs ago. Then quit work on it everything rolled freely so I didnt see a need to go back and re check that work, but what happened is after I installed that belt every time I turned if over the pulley tightened more, the bearing is not seated lacks about 3/16 so crank seal spacer is sunk in to far I am back at ground zero.had good compression and flywheel is fixed too . Very frustrating but shouldn't be to bad to fix. I hope
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I didn't know to heat the case in the oven back then might be what i need to do to get that bearing seated how long should I heat it what temp will this hurt the bearing?
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15 minutes @ 400 degrees is the recipe for success.
Rick
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Well after I made that last post I got to looking I had about 3/16 between bearing and oil seal so I thought bearing has to be seated but is bearing not as wide as original so I called Wayne told him what was going on. He said it sounded like the oil seal needed to go in further it wasn't flush with the case it was out about 3/16 so I removed crank took a 11/16 deepwell socket and drove out bearing and seal sanded outside of seal as Wayne said to do , reseated bearing and drove seal in flush reassembled everything and all is better there, but I still have a problem with that darn flywheel wanting to drag
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Is the flywheel hitting on the coil laminations on the inside?
Rick
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Yes, that flywheel tool Larry made pulls the two pieces together and cinches them tight, so iam not sure what's going on. Could it be bent?
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I thought I hit the jackpot earlier, I went cross town to my building and deep in my archives of obsolete junk a mercury kickoffer engine with a familiar looking phelon flywheel in mint condition I pulled it off and brought it home only to find it slightly different. Oh well.
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Jeremy, what are the differences between that outboard flywheel & the one for the bike?
Mike Sal
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Slightly smaller,and only one set of magnets it really looked promising at first glance
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Iam thinking of putting ducttape over my pickup dominates then putting flywheel on over the tape to maintain clearance,have keyway marked, then tac center hub in from the front drawing it up tight just won't work any thoughts??
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Are you sure the face of the flywheel isn't bent? Have you check to see exactly where the rub is? Try putting some dykum (or use a sharpy marker) & color the face of the pole pieces and the faces of the laminations. Put the hub on the crank & then spin the flywheel while pressing down in the center so it doesn't tip. I think either the flywheel is bent or one of the lamination stacks are out of position.
lots-o-luck
Mike Sal
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There is a guy in Florida who will re-work a flywheel. Larry Brown should know his name. I believe that it is Elbert ?
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Iam beginning to think the face of the flywheel is bent I can see where it cuts scratches in the laminates on one side ,I don't think those are slotted to adjust ill play with it again tomorrow
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Hello ,,, sorry you are having trouble , The flywheel guy is Elbert Faris , ( he's the spitting image of the late comedian Foster Brooks ) but he has only done wico flywheels , He puts in a new center hole with steel disc riveted to original part , he puts three holes in the steel disc for the puller / pinion , a little spray paint on the magnets and the laminated pole parts should revear the culprit in short order maybe pull a plug and turn over slowly and look for "wobble " of flywheel , ( if it is a small amount it shoild still be ok A dial indicator would show if crank is bent , maybe even woodruff key too large ? stuff like this can really tax your patience, I hope problem is small with a quick fix ! Take care ,,, ;D Larry.
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Iam throwing in the towel on this flywheel thing ,make some phone calls tomorrow probley starting with Wayne and ending at UPS . The more I try the worse it gets
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The last time I talked with Wayne, he was trying to find a replacement flywheel. On thing to keep these bikes running the other was to get it to have a 12volt supply. You may ask to see if he any closer to getting a break Thursday on this.
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If you don't have any other sources or offers, you can send your flywheel to me & I can see if I can fix it. I've still got my flywheel off & can use my motor for a fixture.
Just let me know.
Mike Sal
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Thanks Mike , need a fresh set of eyes looking at this
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Sitting in the garage thinking again. Trying to figure out why I am having so much trouble with that flywheel rubbing . Does this picture look correct I have a 1/4 inch here.
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Jeremy, it is hard to see what you are showing there. Did you get a new flywheel from Wayne?
Rick
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Jeremy , I bet you a brazillian dollars this could be solved over the phone , I figured out that you have a tape measure between the crankshaft counterweight and the crankcase , ??? tightening the pulley , ( left hand thread should draw the bearings tight together and the crank should spin free ( unless it is bent , ) does installing the stator plate bind things up ? if so suspect bent crank , ( i have straightened them ) remove parts until crank spins free and give it a few turns as you put the engine back toghether please feel free to give a call 314 609 6568 Larry.
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After phone conversation with Larry I assembled engine. I was very pleased with how easily the bearings came out after the oven trick. I am pretty sure all the bottom end is ok back together every rolls easy until I install flywheel I painted laminates and it hits everyone I heated and removed center hub from flywheel once again put it on the crank tightened completely and spun crank holding rod post hub hobbled pretty bad can't pinpoint why. I then pulled hub back off and made a pointer with a roll of solder pointed right below treads on crank, as suggested by Larry crank ran true. Something is wrong with that hub it seems. On the bright side I now feel better about the bearings and crank
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It would seem the hub somehow is " wacked " might maybe think on removing hub from flywheel that came from outboard ? maybe for giggles and grins try fitting other flywheel (even tho it's not for that machine ) to see if any binding ,,,, looks like progress is happening , and culprit is being narrowed down ,,,,, ;D all the best ,, Larry.
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I wonder how close a lawnmower crankshaft is to a simplex one, regarding the tapered nose where the flywheel mounts. If they are the same, a guy could take a junk lawmower shaft & cut the nose off so you could mount it in a lathe. This would provide a mandrel that you could mount the hub to so you could both measure and re-machine the notch which fits into the stamping to square it up. You also need to check to see what the runout is on the stamping itself.
Mike Sal
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Just reviewed photos and the outboard flywheel tapered hub too big for trial fit , ,,, can't imagine how hub can be " off" ,,,, can't be too hard to reproduce ,, maybe it just needs the mating surfaces cleaned up better before brazing back together ? Food for thought , We'll all sleep on it Larry.
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Wish I could do something with that outboard flywheel but the hub is drilled for a smaller diameter crank also the whole thing is smaller . I do have a 5hp. Brings horizontal laying in the junk may look at it for ideas
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Haven't posted my progress on the Simplex lately because that flywheel caused me a catastrophic mental breakdown. Plus got busy at work, however I got a box and bubblewrap today , going to send it off tomorrow, with a little luck next time I see it problem will be gone. I truly thought that would be an easy fix I will be curious to know what Wayne finds.