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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Excessive endplay in Wakesaw diesel crankshaft

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chris

09-06-2003 20:41:37




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Started my next project for a neighbor, his 1955 with a 1950T engine had a slight knocking and found a wristpin bushing on #5 piston is in the pan now. Then found that the crankshaft has .051 inch endplay instead of the .004-9 endplay. So pulled the thrust main bearing out and find that the crank starting running against the rearside of the thrust bearing cap. And the shoulder for the thrust on the crank is gone,slightly deeper than flush. The I&T manual said something about an oversized thrust .017, but have to turn journal down like .020 to use this. Is this still available and/or does agco/anybody make a bigger thrust bearing to correct this??? The crank is still in the tractor so I'm assuming that the rest of the crank is good. Any help or info will be greatly appreciated. chris

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J.Schwiebert

09-07-2003 08:14:23




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 Re: Excessive endplay in Wakesaw diesel crankshaft in reply to chris, 09-06-2003 20:41:37  
Chris: The other two have you going in the right path. The engine needs to come out and be completely disassembled. You had all that metal floating in there so get rid of it before it breaks loose and does more damage! The thrust will need to be built up and remachined. I would check all the caps for alignment and out of round. If it does not have noddular caps you may need one or more. The crank since this is a diesel is the problem. To weld a diesel crank you need to talk to someone who has the experience and has a crank welder that can handle both types of wire as the sides of the thrust bearing takes different wire than the journals if I remember correctly. Make sure you have the crank wet magged and the Rockwell (hardness ) checked on the crank especially at the thrust bearing. You may be better off to sell the crank to someone that wants to make a puller out of a 283 gas and buying another crank. Check the oil pump plus all the springs (or buy new ones) that regulate oil pressure. On the cooler plates it might be smart to get new ones as the metal particles from the block and crank have become trapped in there and when they break loose the can cause trouble. That is why you need to get the block cleaned. I am surprised that Shep has not answered and said put a 359 Cummins in it. A front frame from an 1850 or 2-105 and a Perkins may be a good fit too. Get two estimates and go with a proven diesel shop

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Shep VA

09-08-2003 10:01:58




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 Re: Re: Excessive endplay in Wakesaw diesel cranks in reply to J.Schwiebert, 09-07-2003 08:14:23  
Sorry, I was out playin in the field. Thanks for stickin up for me though.... :-)



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Nick

09-07-2003 05:29:36




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 Re: Excessive endplay in Wakesaw diesel crankshaft in reply to chris, 09-06-2003 20:41:37  
Ollie is pretty much correct on his advice. When the thrust is out of spec it neets to be taken care of. On my 660 rebuild the end thrust was .050" an it cost me $60 to have the thrust area built up and the crank was then turned. Any engine machine shop can handle it just fine. Don't forget to use one piece wrist pin bushings.



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Ollie

09-07-2003 04:35:34




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 Re: Excessive endplay in Wakesaw diesel crankshaft in reply to chris, 09-06-2003 20:41:37  
I think that's a bad assumption. That kind of wear means the crank should be pulled, inspected, and possibly machined/replaced. The reason is that the other mains may have been damaged.

The cause must also be determined and fixed which is usually the operator riding the clutch and/or wrong clutch adjustment (lack of freeplay).

Also, if one wrist pin failed, the rest aren't far behind. The rods should be machined, new wrist pins installed, new rod bearings installed, etc.

I know it sounds like a major rebuild but this engine obviously has some major problems and my experience is that you are always money amd time ahead if you "do it right the first time".

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ron

09-07-2003 18:24:07




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 Re: Re: Excessive endplay in Wakesaw diesel cranks in reply to Ollie, 09-07-2003 04:35:34  
if you decide to replace crank call 608-732-7463 cell phone ask for brian he has a good one out of 310 wauk



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