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Tractor Talk Discussion Forum

wrench pullers help on a 1486 IH

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Gene Z

08-13-2006 09:34:13




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Hello JUst throwing a call for help to all you IH wrench pullers. Neighbour brought a tractor over and said a shell had turned. No oil pressure and it made a squawking noise when it ran. well we pulled the pan there was no fillings in the bottom and not even one shell turned and the crank was in good shape. pulled the oil pump off and it had a few scraches but nothing that wouldn't still pump oil. Well we put new berings in and a rebuilt oil pump (since we had it apart)and started it. It has oil pressure but still Squawks like crasy The noise sounds like a shaft vibrating in a real loose hole. Here is what we have determined is not the problem. NOt the alternator bearing. not the turbo. not the starter staying engaged. we have not pulled the top end apart yet. Could it be a cam bearing? Could it be the TA making the noise in the Tranny ? is there a throwout bearing on the cluch that could be making the noise. Motor does not sound loose at all. So have any of you had any experience with a problem like this? Thanks in advance!!

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jmixigo

08-13-2006 21:50:44




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 Re: wrench pullers help on a 1486 IH in reply to Gene Z, 08-13-2006 09:34:13  
Cut a piece of skinny broom stick or 3/4" wooden dowell about 2 or 3 feet long. Stick one end of it in your ear and the other end against different sections of the engine. That noise will come through loud and clear. This will give a good starting point. Be sure to listen to the water pump.



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the tractor vet

08-13-2006 19:18:25




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 Re: wrench pullers help on a 1486 IH in reply to Gene Z, 08-13-2006 09:34:13  
Well first off pull the electric sending unit off and install a mechanical gauge , Yes a cam bearing could spin . Yes the throwout bearing could be causeing this but you can drop the long narrow cove plate on the bottom of the center section and look up in there and see if it is stuck or rubbing on the pressure plate fingers . Now if you have steering brakes and the tractor moves that rules out PTO input splines as if they go then everything stops as this drives all the Hdy. pumps and PTO . And if ya don't have hyd. pressure then the T/A will not lock up .

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DaveH IA

08-13-2006 15:10:23




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 Re: wrench pullers help on a 1486 IH in reply to Gene Z, 08-13-2006 09:34:13  
check your PTO see if it will pull a load -- there is a set of splines in the pressure plate cover the turns the PTO splined shaft -had one strip out one time made alot of racket



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the tractor vet

08-13-2006 19:12:44




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 Re: wrench pullers help on a 1486 IH in reply to DaveH IA, 08-13-2006 15:10:23  
If them splines are wiped out you will have NO POWER STEERING NO BRAKES AND NO HITCH NO PTO NO REAR HYD>



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