544 farmall Torque amplifier settings

aug61945 · Mar 19, 2018

I know this has been talked about a few times before.
Been working on my fathers 544 farmall TA
The tractor seems to be in the TA mode and not the direct drive mode.
I have a extreme gut feeling that every thing from clutch to TA is out of adjustment.
there are a few issues such as slack in the connecting pins and linkage points, but mostly just all needs adjusted
for example the TA cam that moves the clutch cam does not make contact and Im sure this has been a problem in the past because someone has welded a bead on the TA cam to make it touch in the past.
I worked with it some yesterday and its linkage operation confuses me beyond belief.
Is the TA cam supposed to raise up on the the clutch cam to engage the TA or does it hold it up and when put into the direct drive position hold up the clutch cam HELP

Dieseltech · Mar 19, 2018

If I recall on the 666 I put a TA heavy Sprague set in, the Main clutch cam is used to DISENGAGE the TA when the main clutch pedal is depressed. BOTH clutches are disengaged at the same time to make shifting easier with the pedal down.

Janicholson · Mar 19, 2018

The TA has a (smaller) clutch in it that is engaged when the TA lever is forward, and the clutch is pushed down all the way. The TA
clutch should release fully when the pedal is still about 1.5 inches from fully depressed. It should also release after the master
clutch. The main clutch should have about 1.25 inch of travel at the beginning of its stroke (freeplay). The book is helpful, but
is also designed around new pins and clevices in the linkage. Best of luck, Jim

Janicholson · Mar 20, 2018

My take: If the TA clutch and the Master Clutch are adjusted to be releasing or engaging at the same time, there will be wear on the TA clutch that is not intended. The TA clutch needs to disengage after the master, as the pedal is pushed, and engage entirely before the master. Kinda like a 2 stage PTO clutch in pedal action. Jim

the tractor vet · Mar 20, 2018

Yep you are correct . Just stop and take a look at the T/A clutch then look at the main clutch , just a WEeeeee bit of difference between the two . It always amazed me that the T/A clutch ann transmit the power and hold with out slipping even when someone turns up the wick and puts more power thru it then stock. . So when setting the linkage that is why there is free travel on the T/A side so that the main can be well on it's way out before the T/A starts to disengage. And like i have said in the past due to age and extensive field testing tryen to go BY THE BOOK does not work and becomes more of a FEEL process . Now one other thing here is that i have run into several times is the T/A pressure plate Nut that holds the pressure plate to the T/A carrier have came loose and caused problems . Most times this has happened due to someone doing there own T/A job and NOT getting this nut that is not tightened up proper as 99% of the people doing there own work do not have the spanner socket to get it tight or they destroyed the locking ring and left it out and not set the tab in the slot .

Dieseltech · Mar 20, 2018

On the 560 I tractor drive with I removed the two pin linkage between the main clutch and TA shaft. It now behaves like MF tractors with the MP option, will "hill hold" with the main clutch disengaged with the TA in direct when going uphill. No need to hit the brakes to keep from rolling backward, but do have to pull the TA for shifting. Also makes the clutch pedal easier to push too. I've been used to MF for years, made the 560 behave the same way now..

544 farmall Torque amplifier settings

aug61945

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Dieseltech

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Janicholson

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Janicholson

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the tractor vet

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Dieseltech

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