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11-19-2019, 11:19 AM | #21 | |
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Re: Main and Rod Shim Sequence ???
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11-19-2019, 12:03 PM | #22 | |
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Re: Main and Rod Shim Sequence ???
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11-19-2019, 05:24 PM | #23 |
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Location: 60615,330th Ave.,Clare, Iowa, 50524
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Re: Main and Rod Shim Sequence ???
Model A's had a lower breakage, because of the bigger shaft that was used, then the Model T's that had, or have about a 65%, or a little higher, crack rate. This is all caused by out of alignment, shaft and bearings.
There are two types of bearing adjustment. No. 1 normal adjustment, .006, or less, which is doable, and safe. No. 2 Try to save bearing mode. After you have .006 of shims used, you now would have an egg shaped hole, that if it were a oil pressure engine, most of the oil would be pushed out the sides of the bearing, to be thrown into the pistons, by the crankshaft, to create, an oil burner. This is why K.R Wilson, recommended pouring every engine in this condition. Also, your center line of the crank, and pilot shaft, and bearing would off, as in alignment Herm. |
11-19-2019, 05:47 PM | #24 | |
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Re: Main and Rod Shim Sequence ???
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Thanks, Herm. |
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11-19-2019, 09:43 PM | #25 |
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Re: Main and Rod Shim Sequence ???
Thanks for the info, Herm. That's a low figure, for sure. And I imagine a lot of the engines that hit your shop have been ridden hard and put away wet! How many engines would you estimate have gone through your shop in those 55 years?
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11-20-2019, 06:15 PM | #26 | |
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Re: Main and Rod Shim Sequence ???
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Model T's, about 400, not counting Babbitt Jobs. 33,000 Spun poured A, Rods, That many , or more in Model T rods. For many years we had 5 to 6 full time Employees. That is not counting all the other makes of cars, and tractors, and all kind of industrial machines. One thing I can brag on is, in 55 years to date, we have never lost a bearing to bad workmanship. The reason for that is if there is even a small imperfection, that won't bother, it goes back, for repouring. At the time of finish machining, whether the bearings are in finished Semi, or completely done. Thanks Herm. |
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11-20-2019, 06:37 PM | #27 |
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Re: Main and Rod Shim Sequence ???
More pictures, same Motor.
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11-20-2019, 07:12 PM | #28 |
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Re: Main and Rod Shim Sequence ???
Just a few pictures left.
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11-21-2019, 05:53 AM | #29 |
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Re: Main and Rod Shim Sequence ???
Another question for Herm, if apologies in this thread!
If I understand it correctly, one of the reasons the peening babbits is to allow the babbitt to have full contact with the engine block. Is also the reason to compress the babbit to achieve a higher density. If so, how deep does peening effect go, it looks like you're peening very hard. After many mil and bearing clearance has become excessive, how much depends on, Wear of crankshaft? Wear of babbitts? Compression of the babit? I understand that it may be due to various causes, but is there a rule of thumb? Hard for me to explain, hope it's understandable. Thanks Jorgen |
11-21-2019, 10:35 PM | #30 |
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Re: Main and Rod Shim Sequence ???
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11-22-2019, 12:36 AM | #31 | |
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Re: Main and Rod Shim Sequence ???
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Herm. |
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