Hyd. Tubes thru trans

[Kevin French]

Where can new one's be obtain

 

[Ultradog MN]

Hello Kevin,
Welcome to the Ford Board.
I just looked at the diagrams for a 641 at external_link (don't know which tractor you have)
And they do show them but don't show a price so I don't know if they are available.
I wonder if you couldn't find some used.
If no one here has a pair try Larry D. He just posted a couple of new ads today in the ads section on the other board and his email is there.
Good luck

 

[Anonymous-0]

A couple of years ago, I replaced the hydraulic intake tube on my 641D. I don't remember what company had them, but they were on the internet when I searched for Ford parts. As I remember, the new tube cost about $65.

The old tube was very hard to remove, and I ruined it getting it out using the tools I had. I needed a special stepped drift, but did not have one. If I had it to do over, I would have one machined. To get the old tubes out, you have to split the tractor between the transmission and the rear end housing.

Replacing the intake tube did not cure my hydraulic problems. I finally found the problem elsewhere, a blown O ring that I had previously replaced, apparently not as well as it should have been. But by that time, I had a LOT OF WORK done on the tractor, most of which was probably not necessary.

I have read that it is possible to repair a leaking pressure tube by inserting slightly smaller tubing into the existing pressure tube, but I have not tried that. If your pressure tube is leaking, you probably will get leakage onto the ground through the drain hole, or your transmission oil level will get way too high and it will come out the shifter. If your intake tube is leaking, you might get leakage out the same bell housing drain hole, or you might get air in your hydraulic fluid and have problems with the hydraulic pump losing prime. Unfortunately, there are other ways that hydraulic oil can get air in it. My hydraulic pump has been rebuilt several times, some of them by professionals, trying to fix the aeration problem. It has cost a lot of money and took a lot of time.

I would suggest that you explore all other possible problems and solutions before you replace the hydraulic tubes, since it is a big job to get them out and a big job to replace them. Good luck, and I hope you have better luck than I did!

 

[KyN]

The tubes are not hard to replace, I just finished doing this on an 850 that had been "repaired" by the PO with a tube glued inside of the original. Biggest mess you every saw. The worst part of all is having to have the transmission completely out of the tractor so you can get to both ends of the tube. The tube removes and goes in from the front or engine end and is a stepped diameter. Simply tap threads into the inside of the tube and pull it out with a bolt and pipe to make a pulling shoulder, comes right out. The bad thing is the new tubes you can buy are not stepped so I had to do some creative reaming/honing on the holes and then pulled the new tube in with a all thread rod and just a touch of hardening Permatex around the tube just before it seated. Works perfect, dry as a bone.

Here is one of 3 places I found that had the tubes
http://www.crosscreektractor.com/default.aspx?page=item%20detail&itemcode=NCA945B

 

[john_Bud]

This was posted by someone here sorry, I lost the original posters name. I would like to credit them for their hard work! This may help you make one or have a machine shop make one for you.

 

[awhtx]

If you can pull the old tube out from the forward end of the trans with a bolt as you described then there is no need to split the trans and rear end to replace the tube?
Just remove the hydraulic manifold, pull the old tube out and drive the new one in?

 

[KyN]

(quoted from post at 22:13:04 06/30/09) If you can pull the old tube out from the forward end of the trans with a bolt as you described then there is no need to split the trans and rear end to replace the tube?
Just remove the hydraulic manifold, pull the old tube out and drive the new one in?

True but the problem I found the new tubes were NOT sized correctly making it necessary to drop out the tranny to FIT the tube (plus mine had been cobbled up by the PO) and press it back in making sure all was lined up correctly. Besides just a good idea to clean everything up and replace the o-rings/gaskets. But then i tend to do a bit of overkill in my repair work, hate like heck to have to redo.