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Model C rod bearing lubrication?

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Scupper

09-06-2000 10:57:38




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Is it correct that the rod bearings receive all the oil they require through the two holes in the upper half of the rod? What's the purpose of the approx 1/4" blind holes that are bored in the crankshaft rod bearing journals? I've got my engine apart (a fresh bought basket case)and am busily confusing myself. I have the manuals, but they don't address this except to mention these "spurt" holes in the rods. Beats me how anything could "spurt" into or out of them. This engine obviously had major bearing problems by the looks of it, so I'm looking over the lube system very closely prior to reassembling. Thanks for any inputs. Later

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Gordon

09-07-2000 22:53:34




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 Re: Model C rod bearing lubrication? in reply to Scupper, 09-06-2000 10:57:38  
I have been told that some people that intend to really use and work their "C" A-C's replace the crankshaft with one from a "CA" and use "CA" rod bearing inserts and either plug the holes in the camshaft or replace it with a "CA" camshaft as well. This is supposed to give them a full pressure lubrication oil system. I heard someone (I am not sure that I believed him or can even guess that he actually did it) say that he used a crankshaft from a "D15". Has anyone else heard of this crankshaft interchange? Has any one done it? Does anyone have any information on making the "C" A-C's engine a full pressure lubrication oil system?

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Dick L

09-08-2000 14:21:41




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 Re: Re: Model C rod bearing lubrication? in reply to Gordon, 09-07-2000 22:53:34  
Since you have oil pressure with the holes in the cam to start with you can plug the holes but you will still have oil pressure if you don't. However you will have to plug the holes in the rods or the oil will squirt out the holes in the rods faster than the pump can pump the oil. I just last week pluged a set of rods, I sand blasted the holes and used acid core solder. I am useing the cross drilled crank in a B only because it needed to have the crank reground and I bought a setup CA engine with a good crank for 25.00. Can't get one ground for that.

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Butch(OH)

09-08-2000 12:39:35




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 Re: Re: Model C rod bearing lubrication? in reply to Gordon, 09-07-2000 22:53:34  
Gordon, The CA engine runs at higher rpm than the B or C thus the change to pressure lubed rods. When operated at rated rpms there is no need to convert a B or C to this system. The person that told you not to work one of these tractors unless converted is not very well informed.



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Butch(OH)

09-06-2000 12:09:08




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 Re: Model C rod bearing lubrication? in reply to Scupper, 09-06-2000 10:57:38  
Yes you are correct that the rods are not pressure lubricated. If you look closely at the camshaft you will see holes drilled between the lobes that throw oil at the rod journals.



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Scupper

09-07-2000 04:04:25




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 Re: Re: Model C rod bearing lubrication? in reply to Butch(OH), 09-06-2000 12:09:08  
Thanks Butch. I never would have thought the oil would have come from the cam shaft. I'll check the cam shaft out carefully, along with all the other lube system components. Scupper (former Buckeye, now living in Maine)



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