Re: shortening PTO shaft with zerk fittings

Posted by Fred Martin on July 29, 2005 at 12:33:00 from (69.218.163.56):

In Reply to: shortening PTO shaft with zerk fittings posted by JB OH on July 29, 2005 at 08:53:29:

You better check the first few inches of the tube...it has the square part that is welded in the front end (of the tube)to accept the square drive shaft. If you cut 4 inches off of it you may only have an inch or two left to drive the mower...no good! You have to cut the tube only.....by grinding a weld off from the rear yoke and knocking the yoke out of the tube...then shorten the tube the amount needed....but before you do this scribe a line on the tubing and yoke down the center axis and when you cut the tubing off to new length and put the yoke back in...you"ll have a line already there to align the yoke back in the same place it was in. Then try the shaft and if you have to ...take a similar amount off the square shaft by hack sawing it and deburring the end with a file or grinder. If you don"t get the tubing cut exactly straight but close...just drive the yoke into the tubing and rotate the whole pto shaft (hooked up) with anything up next to it and tap on the tube with a wood mallet or such till the whole assy runs within a few thousandths of an inch and then tack weld four places (with yoke covered from sparks) and then weld all the way around. Should use 7018 low hydrogen rod because the tubing is cold rolled and the yoke is a casting or forging. Clear as mud? Well, I have done many of "em this way if I was away from the lathe. I"ve even done truck driveshafts this way that ran at highway speeds and no vibration. PTO shafts run at a lot slower speed so you shouldn"t have any problems. Fred OH

Follow Ups:

• Re: shortening PTO shaft with zerk fittings JB OH 12:51:31 07/29/05 (2)
  • Re: shortening PTO shaft with zerk fittings Fred Martin 11:12:17 07/30/05 (0)
  • Re: shortening PTO shaft with zerk fittings paul 23:01:39 07/29/05 (0)

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