Re: Re: Tractor Term

Posted by karl f on May 07, 2003 at 10:54:21 from (65.237.15.48):

In Reply to: Re: Tractor Term posted by karl f on May 06, 2003 at 10:19:08:

ok i looked at the book and here's my version of what i found:
due to the technology of the time ((c) 1929) part of completing the overhaul process involved inverting the partially assembled short block on a running in machine set to turn it at 188 rpm to burn in the bearings (i.e. make them conform to the shape of the crankshaft). every 30 seconds or so oil was poured on the bearings. this was done until the crank shaft could be turned by hand at the hand wheel of the machine. first the main bearings were burned in, then the rod bearings. then after this process, the oil grooves were scraped in, and the block was further assembled, put right side up, using the machine's oil sump. then the machine was set to turn at 550 rpm. this is done again until the assembly can be turned by hand with the hand wheel of the run-in machine. then the engine was assembled, the machine engaged until it starts under its own power, and then it's disengaged to allow the engine to run until loosened up enough to be cranked by hand, and to make any adjustments, discover any problems/leaks. then finally it's put in the car/tractor and driven in the break-in process.
i left out some details and procedures. somewhere else in the book it also mentions some people believe that the run-in process can be skipped and the vehicle operated under the break-in procedure, so i think with today's technology, if you set it up properly while assembling, you should only need to do the break-in we're familiar with.

-karl
ps emailed to you as well...

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• Re: Re: Re: Tractor Term karl f 10:59:09 05/07/03 (0)

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