Cincinnati Horozontal Mill problem

Tom Miller · 2006-01-31T06:30:05+00:00

I volunteer at the local science museum,rebuilding old machinery. Mostly steam and early diesel tractors and road rollers. We have a pretty good shop with a selection older, but good solid machine tools. Among them is a Cincinnati horizontal mill No.2 M1 ( serial F5409-6) made in 1946. Another of the volunteers(No , it really Wasn't me) pulled the gearbox selector assembly off the side of it as the machine appeared to be seized. It appears that it somehow selected two different gear ratios at once. It appears also, that the gear selection is done hydraulically by pistons which push selector arms in response to the position of a multi-port valve .The question is -how do you get the selector arms in the correct position to re-assemble it. We will probably have to replace the "o" rings on the pistons as that is possibly why it selected two gears at once.Does anyone have any experience with this or a similar machine? Am I looking in the correct areas and are my suppositions reasonable? We spent 2 hours today (and a fair amount of bad language) trying to get those selectors in the right positions to re-assemble it.Tom Miller

Jan 31, 2006 22 Replies

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Tom Miller 20 years ago

You won't find them at that price in Aus.

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Tom Miller 20 years ago

"Tom Miller" wrote in message news:43df03f1$ snipped-for-privacy@quokka.wn.com.au...

Further to the saga of the horizontal milling machine, we today decided to give it the Lazarus treatment. We pulled the gearbox out of it and immediately found the real cause of the problem. The countershaft nut had backed off and allowed excessive!! clearance in the bearings. we tightened it up, decided we could live with the wear in the gears and will re-assemble it next week. Someone asked about photo's so I've put thee in the dropbox.

Regards

Tom Miller

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Tom Miller 20 years ago

"Tom Miller" wrote in message news:43df03f1$ snipped-for-privacy@quokka.wn.com.au...

Last word on the Cincinnati Mill.

We re-assembled it after cleaning out the oil sump and filters. . A test run was successful and it is back to work for it..

Thanks to all for your suggestions and encouragement.

Tom Miller

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