1st & Rverse shifter fork replace

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Beach Bubba
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1st & Rverse shifter fork replace

Postby Beach Bubba » Sun Mar 29, 2020 6:11 pm

...Bought tractor with known problem...(won't shift properly). everything seems okay except the fork is broken and the poppet spring and ball are missing. The PO was able to tighten the the broke fork on to the shaft in order to shift, but having no poppet to retain it...well you can imagine....miraculously, the gears are all good. Just the top of the shifter fork where the shift rod fits in the 1st and rev slot is wobbled out pretty bad....My question is, is there any short cut to splitting the rear just enough to pull the sliding shift rod back enough to to insert a new shifter fork. Or, what is the easiest way to accomplish this.
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Last edited by Beach Bubba on Sun Mar 29, 2020 7:58 pm, edited 1 time in total.

tst
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Re: 1st & Rverse shifter fork replace

Postby tst » Sun Mar 29, 2020 6:20 pm

no need to split it, slide the rail back towards the PTO, slip new fork on shaft, drop a spring and ball through the hole in front where the shaft goes into case, hold down some pressure on the ball/spring and slide shaft in

Beach Bubba
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Re: 1st & Rverse shifter fork replace

Postby Beach Bubba » Sun Mar 29, 2020 6:28 pm

...got it...almost. I can't get the rail (rod) to slid far enough to the rear...it comes out easily to the point it seems to hit something. It is far enough that I can replace the poppet spring and ball and then no more...??? Should I try to force it../

Beach Bubba
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Joined: Mon Jan 21, 2013 9:33 am
Zip Code: 77964
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955 David Brown
D20-A komatsu
1085 Massie
Location: South Central Texas..(PTL)

Re: 1st & Rverse shifter fork replace

Postby Beach Bubba » Sun Mar 29, 2020 6:29 pm

...and was there ever a fork used that was in two pieces..??

Beach Bubba
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Posts: 18
Joined: Mon Jan 21, 2013 9:33 am
Zip Code: 77964
Tractors Owned: 3 cubs
955 David Brown
D20-A komatsu
1085 Massie
Location: South Central Texas..(PTL)

Re: 1st & Rverse shifter fork replace

Postby Beach Bubba » Sun Mar 29, 2020 8:02 pm

tst wrote:no need to split it, slide the rail back towards the PTO, slip new fork on shaft, drop a spring and ball through the hole in front where the shaft goes into case, hold down some pressure on the ball/spring and slide shaft in

:thanx:

Can't seem to slide the rod back...it hits hard on something before it clears the poppet housing in the front....I can easily replace the spring and ball but just can not get it to slide further.
Last edited by Beach Bubba on Sun Mar 29, 2020 8:29 pm, edited 1 time in total.

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Re: 1st & Rverse shifter fork replace

Postby Jim Becker » Sun Mar 29, 2020 8:18 pm

I suspect there is some damage to the rod that is keeping it from moving. It could be dinged up or even have some weld spatter. Closely inspect the part of it that is about to enter the rear hole when it stops moving.

The fork was originally one piece.

Looks like your transmission oil is pretty nasty. Drain it, flush with diesel fuel (or kerosene), drain again, refill with fresh oil. You may find the old poppet ball when you drain it.

Beach Bubba
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Location: South Central Texas..(PTL)

Re: 1st & Rverse shifter fork replace

Postby Beach Bubba » Sun Mar 29, 2020 8:28 pm

Jim Becker wrote:I suspect there is some damage to the rod that is keeping it from moving. It could be dinged up or even have some weld spatter. Closely inspect the part of it that is about to enter the rear hole when it stops moving.


The fork was originally one piece.

Looks like your transmission oil is pretty nasty. Drain it, flush with diesel fuel (or kerosene), drain again, refill with fresh oil. You may find the old poppet ball when you drain it.

:thanx:

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Don McCombs
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Re: 1st & Rverse shifter fork replace

Postby Don McCombs » Sun Mar 29, 2020 10:40 pm

Or the ball and/or spring could be in the wrong place and be what's keeping the rod from moving all the way.
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Re: 1st & Rverse shifter fork replace

Postby Urbish » Mon Mar 30, 2020 8:18 am

Like the others said, you should be able to slide the rod rearward into the diff/pto area of the trans without splitting. I have done several this way. You can remove the PTO cover and look inside to see if you're hitting on something that shouldn't be in there. You'll need to replace the gasket or apply RTV sealant to the cover once you are done.
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Beach Bubba
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955 David Brown
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Re: 1st & Rverse shifter fork replace

Postby Beach Bubba » Mon Mar 30, 2020 8:12 pm

Don McCombs wrote:Or the ball and/or spring could be in the wrong place and be what's keeping the rod from moving all the way.
....ball and spring are not there.

Beach Bubba
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955 David Brown
D20-A komatsu
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Location: South Central Texas..(PTL)

Re: 1st & Rverse shifter fork replace

Postby Beach Bubba » Mon Mar 30, 2020 8:14 pm

Urbish wrote:Like the others said, you should be able to slide the rod rearward into the diff/pto area of the trans without splitting. I have done several this way. You can remove the PTO cover and look inside to see if you're hitting on something that shouldn't be in there. You'll need to replace the gasket or apply RTV sealant to the cover once you are done.


Might have to do that....I am glad to know it can be done with out splitting....Just got to find out why it is not slidding back...??? :thanx:

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Re: 1st & Rverse shifter fork replace

Postby tst » Mon Mar 30, 2020 8:22 pm

the spring and ball may be in place holding it there, rotate the shaft with a pair of vise grips 180 degrees this will get the ball out of the notch on the rail while you try and slide it back, keep a magnet over the hole in case the ball pops out when the rail goes back to catch it

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Re: 1st & Rverse shifter fork replace

Postby Glen » Mon Mar 30, 2020 10:27 pm

Hi,
Check the shifter rod, feel it all the way around it in the area where it stops going through the hole in the housing, and see if it is rough. File it smooth if it is too big to go through the hole.
Jim B. said this above.

You can turn it around with pliers, like tst said above. :)

Beach Bubba
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Posts: 18
Joined: Mon Jan 21, 2013 9:33 am
Zip Code: 77964
Tractors Owned: 3 cubs
955 David Brown
D20-A komatsu
1085 Massie
Location: South Central Texas..(PTL)

Re: 1st & Rverse shifter fork replace

Postby Beach Bubba » Tue Mar 31, 2020 11:11 pm

:hattip: :worthy:
Glen wrote:Hi,
Check the shifter rod, feel it all the way around it in the area where it stops going through the hole in the housing, and see if it is rough. File it smooth if it is too big to go through the hole.
Jim B. said this above.

You can turn it around with pliers, like tst said above. :)


...yep, nailed it....filed the area around the clamp down notch a little and it slid right in....like: :censored: :tractor:

Is this forum great or what :thanx:
Last edited by Beach Bubba on Tue Mar 31, 2020 11:32 pm, edited 1 time in total.

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Re: 1st & Rverse shifter fork replace

Postby Barnyard » Tue Mar 31, 2020 11:29 pm

Beach Bubba wrote:Is this forum great or what

Yes
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