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Fordson Dexta Gear Problems

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Jack Mayers
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PostPosted: Sun Dec 10, 2017 4:53 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

This was very helpful.My Dexta gets stuck in gear from time to time, usually at the worst possible time. I keep a 1/2" wrench in the tool box
to take the cover off and put it back in neutral. Maybe I will buy a new shifter.
 
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Tractor Guru
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PostPosted: Sun Dec 10, 2017 6:31 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

Okay! So the worn shifter fix tightened the shifting up ALOT but didn't fix the stuck in gear problem! Then I noticed the "dowels" in the
case that are spring loaded (Pictured) Only one of them is up and the other two are stuck! Does that have to do something with it?

 
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Deutz Lover
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Location: Georgia

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PostPosted: Mon Dec 11, 2017 6:22 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

CVPost-Tractor Guru wrote:
(quoted from post at 22:31:53 12/10/17) Okay! So the worn shifter fix tightened the shifting up ALOT but didn't fix the stuck in gear problem! Then I noticed the "dowels" in the
case that are spring loaded (Pictured) Only one of them is up and the other two are stuck! Does that have to do something with it?


Guru,

Before you try anything if you can run the tractor with the range shifter in neutral crank it with the fuel cock closed and after it stops pull the stop lever out and leave it out if it will stay. You don't want it to accidentally crank while you are working on it. If necessary crack open the injector line nuts to make sure there is no fuel going to them.


I don't quite understand what you mean when you said the repaired shifter tighened the shifting up, but it is still stuck in gear. I need a more complete description of what is going on. Can you move the shifter in all four positions with the right range shifter in neutral or high or low?

Have you rocked the tractor back and forth with the range shifter in high or low and then tried the left hand shifter? I will have to check the Dexta with the shift cover that is off when it is not as cold and rainy. The rain quit, but it is still wet and co-cccooold. Looks cold and snowy where you are.
 
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PostPosted: Mon Dec 11, 2017 7:59 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

I will try to explain the best about what it is doing! When I'm driving the tractor in 1st and I go to shift into 3rd or reverse the tractor
seems like it goes into the gear, but if you let out the clutch the tractor will stall! If you put the lever into the "neutral" position the
tractor will still drive in 1st! You have to shift to 2nd, and sometimes even 3rd before the tractor will go into reverse and reverse
actually function! So basically you have to shift through all of the gears most times before it will actually hit reverse.
 
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Deutz Lover
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PostPosted: Mon Dec 11, 2017 8:27 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

It sounds like when you shift it is trying to mesh two gears at the same time which is why it stalls the engine when you let the clutch out. It could be that the lollipop is too wide.
I will have to look at this.

I kind of feel like the ground based NASA lab trying to duplicate a problem in space to find the problem.

I haven't got a swimming pool to simulate the weightless environment. lol

Someone else may be able to reveal the problem from prior experience before I get a chance to evaluate everything.

.
 
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Deutz Lover
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PostPosted: Mon Dec 11, 2017 9:21 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

I have a manual of the transmission which is available as a free download at
fordson-dexta.de

There are several sections to this. You will want to download just the manual section pertaining to the tranny and rear axle. I don't remember which one it is, I think it is still available.

Make sure you have your antivirus updated. There is always some clown trying to ride a virus or trojan in on some of these.

The three dowels are spring loaded plungers each with a ball on the bottom. A broken spring or rusted plunger might cause the problem. I believe the balls fit into recesses in the shifter rods and rise up and down in a ballet as the rods are moved.

I also think there are four selector forks and two selector rail gates. The two gates are the parts that the lollipop directly contacts Each of these forks and gates have a retaining screw and locknut. If one or several are loose or broken this might add to the problem.
 
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Deutz Lover
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PostPosted: Mon Dec 11, 2017 9:51 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

I found the pdf file by typing in Dexta gearbox and search.

It will come up www.fordson.se/6_8_Dexta_verkstadshandbok_101-198.pdf

That is the one you want.
 
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PostPosted: Tue Dec 12, 2017 6:09 am    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

Oh awesome! I actully have the manual to the tractor and I didn't find what I was searching for I guess! Thanks a bunch!
 
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Deutz Lover
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PostPosted: Tue Dec 12, 2017 12:01 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

Guru,

"Peccavi".

This was the one latin word message supposedly send by Charles James Napier to his superiors in India (1843) when he retook the province of Sindh instead of just putting down rebelling troops. It translates to "I have sinned".

Well so have I. When I put in the new shift lever I did not go back and seal the shift plate so some water entered the tranny. This is nothing new, but I should have remembered to reseal the cover.

If your Dexta has been outside during a lot of rain it too many have water which may have wet the shifting rods and gates.

You need to test the gates with a long flat bladed screw driver.
Test the left hand gate first. It should slide forward until the spring loaded ball enters the detent cut into the shift rod. The same thing should happen when you lever the gate to the rear to shift it to reverse. If you do not feel a positive click at each point then the ball is not entering the divot or detents or has no pressure on it for some reason.
The same thing should occur when you lever the right hand gate and the range shifter.

You should not be able to move both gates together at the same time or if one gate is engaged in a gear you should not be able to move the other gate from the neutral/centered position.
You might want to take an oil gun and lubricate the gates and rods or any other part that might have rust on it.

If you need photos I cannot do it today.
 
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PostPosted: Tue Dec 12, 2017 12:44 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

Okay thanks! I'll go out there and feel everything and oil what needs it! I don't imagine I will need pictures, but thanks for offering!!!
 
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Deutz Lover
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PostPosted: Tue Dec 12, 2017 5:03 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

I have reread you description of the problem. You may have a loose shifting fork. If it still drives after you put it in neutral and it is still in first gear this is very likely. When you shift to other gears it slides the loose gear temporarily back into position. There is a very high probability this is the problem. Your may also be able to feel the loose gear or the fork moving when you move the selector rail gates if this is the problem.

I am not sure what happens if one of the slide gates is loose and will have to look myself. I think the check for this to measure the distance each gate is from center at each position. If the gates don't stop at the same distance something is wrong.
 
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PostPosted: Sat Dec 16, 2017 7:28 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

Okay! That sounds like it could be a problem also! I'll check into it! Thanks!
 
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Deutz Lover
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PostPosted: Sun Jan 28, 2018 4:03 pm    Post subject: Re: Fordson Dexta Gear Problems Reply to specific post Reply with quote

Tractor Guru did you find out what the problem is with your gear shift on your Dexta?
 
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