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TA Question

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Larry NCKS
Tractor Guru

Joined: 23 Dec 2001
Posts: 6075

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PostPosted: Wed Aug 29, 2007 3:12 am    Post subject: Re: TA Question Reply to specific post Reply with quote

The front position on the TA is the direct drive position. The back position is an underdrive position. It will not hurt to use the TA as long as one is aware that the older and smaller tractors freewheel in TA and it is shifted sharply as have been mentioned previously.
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Owen Aaland
Tractor Guru

Joined: 14 Feb 2007
Posts: 4799
Location: Zumbrota MN

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PostPosted: Wed Aug 29, 2007 6:34 am    Post subject: Re: TA Question Reply to specific post Reply with quote

The parts that cause the most trouble with the smaller TA units are the ramp and rollers. While you are using the TA is the only time these parts are NOT wearing.

When you are using the TA, the direct drive clutch release bearing is operating so you are using up more of the life of this bearng. It should last for thousands of hours so this should not be a problem. If you do use the TA a lot it would be a good idea to replace the TA release bearing whenever the main clutch is replaced.
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Tractor Guru

Joined: 30 Jan 2004
Posts: 30803
Location: St. Cloud, MN

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PostPosted: Wed Aug 29, 2007 8:05 am    Post subject: Re: TA Question Reply to specific post Reply with quote

If there is smell, it needs adjustment pronto. The book is the correct way to do it on the mechanical TAs. The use of the reduction position (TA back) will allow the tiller to push the tractor even if working correctly. there is no solution to that except possibly using a spring toothed drag section behind the tiller to pull on the tractor some. The issue with going down hill is only going to be a concern if the ground speed in that gear TA back (of the 5 speeds or reverse) is allowed to coast to a faster speed than direct would be in that gear. The problem is that the TA then spins faster than engine speed, and design parameters. Some times comming apart catistrophically (I have heard of cracked torque tube castings, but no injuries from overspeed TAs. They thrive on use, use it all the time as needed. Never think of it being used up, it does not make a difference. JimN
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Long Time User

Joined: 15 Jul 1998
Posts: 524
Location: Britton Michigan

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PostPosted: Fri Aug 31, 2007 7:21 pm    Post subject: Re: TA Question Reply to specific post Reply with quote

well, i gave up on adjusting it (PLEASE DON'T SHOOT ME!) because whenever i adjust it, some one who will remain nameless, goes back and messes with it. it makes the sound in the back UD postion. rightnow, to shift the transsmision, you have to pull it back in UD (or TA mode if you prefer)but if you pull the TA lever back too far, it makes a grinding sound. when going down the road, comming to a stop sign, i throttle back, and shift into TA to slowdown and to start out again, then shift in to DD and throttle to wide open after i cross theroad. will that hurt it? or is it only a "down hill free wheel" that kills them? thanks if anyone reads this anyway
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