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What's Inside A T66x?

t66 t66x vickers simplicity allis chalmers hb112

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#1 New.Canadian.DB.Owner OFFLINE  

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Posted December 18, 2012 - 11:18 PM

My T66x was leaking at the forward/reverse control and at the point the motor enters the reduction gear box. I found a seal kit online, PRO-ACTIVE Fluid Power, but that's another thread. Everyone loves pictures, so here goes ...

Rebuild 0.jpg

Rebuild 1.jpg

Pump innards:

Rebuild 2.jpg Rebuild 3.jpg Rebuild 3a.jpg Rebuild 4.jpg

Two words of warning:

1) There are 2 pins that fasten the 2 pintles in the yoke. The manual says to use a 3/16" punch and to tap them until they "disengage from the yoke." They don't go all the way out! They slide into, and come out with, the pintle.
Pintle and yoke pin removal.jpg

2) the manual says to drive the pintle out by pushing it INTO the case. You can't! There is a lip that stops you. You need to drive them OUT of the case.

Motor innards:

Rebuild motor 1.jpg Rebuild motor 2.jpg Rebuild motor 3.jpg Rebuild motor 4.jpg Rebuild motor 5.jpg Rebuild motor 6.jpg Rebuild motor 7.jpg Rebuild motor 8.jpg Rebuild motor 9.jpg

Edited by New.Canadian.DB.Owner, December 23, 2012 - 12:26 PM.

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#2 JDBrian OFFLINE  

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Posted December 19, 2012 - 05:04 AM

Thanks for documenting this. Very nicely done!
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#3 mjodrey OFFLINE  

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Posted December 19, 2012 - 06:08 AM

Thanks for documenting this. Very nicely done!



Ditto,thanks.
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#4 KennyP ONLINE  

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Posted December 19, 2012 - 06:17 AM

We don't see many threads of the innards of any hydros. Glad you posted this one.
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#5 Alc ONLINE  

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Posted December 19, 2012 - 06:40 AM

Thanks for posting those pictures ! Is that wear on the 2nd picture of the motor , the outside part hold the pistons ? Can't remember which parts move , old age I guess lol Al
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#6 New.Canadian.DB.Owner OFFLINE  

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Posted December 19, 2012 - 04:50 PM

... Is that wear on the 2nd picture of the motor , the outside part hold the pistons? ...

You scared me! I had to go look at the other photos I took, but it is just a reflection off of something.
Rebuild motor 10.jpg

Can't remember which parts move , old age I guess lol Al


The whole assembly (pic 2) spins as a unit inside the housing, but is mounted on a shaft (pic 6). If everything is working correctly, it is far enough from the housing walls to prevent wear.
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#7 coldone OFFLINE  

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Posted December 19, 2012 - 06:49 PM

Looks similar to the innards of the sundstrand 15 series. Thanks for the info.
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#8 New.Canadian.DB.Owner OFFLINE  

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Posted December 22, 2012 - 06:09 PM

I went out to fill the hydro with transmission fluid today. At least that was the goal. I was doing well until I spotted this ...

re-repair 0.jpg

Seems the O ring isn't able to make a seal. When I opened the pump housing, I found there is some wear in the pintle openings on both sides. I think I will need to get them drilled & bushed. The pintles are also a little worn and they may need to be sleeved.

re-repair 1.jpg re-repair 2.jpg

Oh, and a post script to my first post: The "lip" that was keeping the pintles from bing driven into the yoke, as per the manual, turned out to be the swash plate.





Also tagged with one or more of these keywords: t66, t66x, vickers, simplicity, allis chalmers, hb112

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