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Farmall & IHC Tractors Discussion Forum

504 Shifting Problems

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Author  [Modern View]

12-31-2016 18:19:06

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I have a 1966 IH 504. Its getting harder and harder to shift between all gears, I have to really yank on the shifter to get into another gear. Especially between 1rst and reverse. Any ideas.

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01-01-2017 12:54:46

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 Re: 504 Shifting Problems in reply to keithre, 12-31-2016 18:19:06  
I bought a set of manuals off e bay but nothing in there about adjusting the TA clutch. Do you know if there is a link or something to the information ?

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01-01-2017 22:12:21

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 Re: 504 Shifting Problems in reply to keithre, 01-01-2017 12:54:46  
The process (as I do it): Set the clutch free play at 1 inch down from all the way up measured at the foot plate to cast contact in the pedal arm. this can be felt by hand. In an open area with nothing to run into, use low gear, and measure with a tape measure, the point that letting up on the pedal causes the tractor to begin to move. this is the engagement point of the master clutch. The TA linkage is now adjusted so it begins to be released at this position of the foot pedal. further depressing the pedal releases the TA clutch fully. (usually another 3/4" or so to an inch of foot travel. This assures that the TA clutch is fully engaged when the master clutch applies power through it. It also assures that the full pedal depression releases the TA clutch so shifting is not bound up. The lever should apply and fully release the TA clutch very near the center of its travel. Doing this compensates for linkage wear and I have had no issues doing it this way. Jim

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01-01-2017 11:37:46

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 Re: 504 Shifting Problems in reply to keithre, 12-31-2016 18:19:06  
I think what tractorvet is saying is that there is probably some wear in the linkage, and you should do it by the book, but you need to compensate for that wear at the same time.

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Red Mercury

01-01-2017 09:27:32

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 Re: 504 Shifting Problems in reply to keithre, 12-31-2016 18:19:06  
I agree with the others. We have had a 504 utility with T/A on the farm since new and difficulty shifting it out of gear is a sign of the T/A needing adjustment. I have done it many times. The tractor still has the original T/A and has never been repaired. I always adjust it according to the operator's manual instructions.

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The tractor vet

12-31-2016 18:24:41

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 Re: 504 Shifting Problems in reply to keithre, 12-31-2016 18:19:06  
Yea, if it has a T/A then the T/A and main clutch are out of adjustment .

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12-31-2016 18:23:46

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 Re: 504 Shifting Problems in reply to keithre, 12-31-2016 18:19:06  
Does it have a TA?. If so,a TA adjustment may be in order. Do it 'by the book'.

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The tractor vet

12-31-2016 18:28:18

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 Re: 504 Shifting Problems in reply to DeltaRed, 12-31-2016 18:23:46  
You were faster on the trigger tonight . When it comes to doing it by the book all depends on how much FIELD TESTING it had when new . And with that i am going to the kitchen and fix me my NERVE med's .

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