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Help - Model Crankshaft “needs-repair”


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  #11  
Old 09-25-2018, 07:11:57 AM
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Paul Spence Paul Spence is offline
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Default Re: Help - Model Crankshaft “needs-repair”

The Loctite 638 came a day early (I hate waiting for “STUFF” anyway) so I got busy. I trial fit the pieces together (slight drag) along with the taper pins thinking of the best way to put the Loctite on the assembly. I pulled the pins, put a couple of drops of Loctite in the holes, spun the crankshaft a few times to distribute the Loctite evenly, and lined up the taper pin holes. This took me about 30 seconds, and all of a sudden *** *** the shaft seized as the Loctite did its job a bit fast. I managed to get the first taper pin all the way in, but the second wouldn’t go (#%**). I grabbed the little torch and heated the area a bit and got it in – pheew, Boy that Loctite works fast . I let the assembly sit a bit as I gathered my senses as to what just happened . I previously read and watched several videos on Loctite and this was a surprise to me that it worked that “FAST”. Anyway, here is a photo of the Loctite’d assembly before final machining and putting the crankshaft back in the Red Wing, hoping my fix is OK. . Boy that was "FUN", even with an added "rush" I got doing the crankshaft, especially in NJ on the way through.

Ps: Now I have 49.9ml of Loctite 638 (I never used before) left in the cabinet for the next few jobs – someday – maybe - but it got the job done .
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Old 09-26-2018, 07:40:37 AM
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Default Re: Help - Model Crankshaft “needs-repair”

I cut out the throw for the crankshaft on the band saw, and finished the inside with the mill . I polished the crankshaft with some 220 before putting it back on the model . Put the crank gear on and set the valve timing, and then flywheels back on and the governor parts . Spinning the flywheels show that I did a good job fixing the crankshaft . Not perfect but a lot better than before (tight) .

Back to the Air Cooled - Red Wing Model -Almost Finished @
https://www.smokstak.com/forum/showt...87#post1516087
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Old 09-26-2018, 08:46:22 AM
J.B. Castagnos J.B. Castagnos is offline
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Default Re: HELP-Model CRANKSHAFT “needs-repair”

Nice work.
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Old 09-26-2018, 12:06:27 PM
Bob N Bob N is offline
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Default Re: HELP-Model CRANKSHAFT “needs-repair”

Paul

Nice job and explanation. I had a similar problem and talked to a Loctite tech. I was attaching a cylinder to the base for a hit miss model so it had to be positioned and heat was an issue also. He suggested using 640 retaining type, has about a 30 min setup time so positioning is easy.

Bob
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