6245 hydraulic issues

[prestonpaul]

I have recently bought a 6245 that has been neglected for the last few years and has a few issues. I have sorted out most of the problems, installed all new fuel lines as the old ones broke if you looked at them the wrong way and replaced the clutch master and slave cylinders and along with the upgraded 20mm buttress caps and clutch fingers (what a nightmare of a job).
I am in the process of changing all the fluids and found the transmission fluid came out really thick and milky. I assumed that this was caused by water in the oil, I let it drain overnight and replaced the oil the following morning. Took the tractor for a 15 minute run and the oil is all milky again. Could this be caused by residual water left behind after draining the oil or could it possibly be aeration caused by an internal leak in the hydraulic system?
The reason I ask is I have a problem with the 3 point linkage which I assumed was related to the oil in the water but it is still there after the oil change.
The tpl creeps up to the travel position once the engine is started but there is no control over it with the position leaver. Once the engine is shut down it creeps all the way back down again. I cleaned the pickup screen and replaced the hydraulic filter when I did the oil change. The pick up screen was choked with dirt, iron filings and bits of silicone gasket sealant. I have the pto leaver all the way forward in pump only position and the draft lever in position control (all the way to the rear).
Can anyone point me towards where I should look next? I am leaning towards it being a problem with the hydraulic distributor but am not sure. Could it also be related to blown seals in the lift ram or auxiliary lift ram? Or a faulty releif valve or the connection seals on the hydraulic pump or the pump itself?
How hard is it to rebuild the hydraulic distributor for an amature mechanic? Is there a rebuild kit available or are the o- rings etc commonly available sizes?
As this is my first tractor on my first farm I don't have a lot of money to throw at it, however I have to get it sorted so I can put it to work! Any help or advice on this problem would be very much appreciated!
Paul.

 

[bobnz]

G'day Paul
Do you have any books with information on the hydraulic system.

 

[prestonpaul]

G'day Paul
Do you have any books with information on the hydraulic system.

I have the workshop manual and the owners manual. The factory workshop manual I think assumes a fair amount of prior experience which I don't have
Paul

 

[ixer0]

Hi Paul,

Can you borrow a pressure gauge to see what pressure you're getting at the tipping connectors ? The white oil could well be aeration caused by a loose internal connection, cracked pipe or splt 'o' ring. The arms dropping is probably lift piston seals or diff valve sticking. If you can check the pressure before you strip it out you'll have a better idea of what's wrong. It sounds like you will have to take the lift cover assembly off. Check the seals on the internal lift cylinder once you have it off. It will pay to check the diff valve is free while you are there. Your manual should tell you which one it is. To give you a clue it runs shortways across the distributor and is held in with "C" clips. Good luck.

Mike

 

[prestonpaul]

Hi Mike.
Thanks for the advice. I'll try and get hold of a pressure gauge and do a bit more investigation. In the mean time I'll email my parts supplier and get a price for seal kits for the lift cylinder and hydraulic distributor. If they aren't too expensive I may as well replace them while I have the cover off.
Paul.

 

[bobnz]

Paul
If you check your "Messages" on this site I have left one to you before Mike left his valuable help .

 

[prestonpaul]

Paul
If you check your "Messages" on this site I have left one to you before Mike left his valuable help .

Thanks for the heads up Bob.
I've sent you an email.

 

[prestonpaul]

Just an update on my hydraulic woes. I found where I was loosing pressure, both the o-rings on the connector between the hydraulic distributor and the pipe coming from the hydraulic pump were broken and I believe this was aerating my oil giving it the thick creamy appearance. The lack of control over the three point linkage was due to the small link between the operating leaver inside the hydraulic cover and the valve on the distributor having come off it's pin on the operating leaver. there doesn't seem to be any method of holding it in place. there is no grove for an e-clip like there is on the other pins. Can anyone shed some light on this?
There also seems to be a part missing from the leaver mechanism under the cover. There is a leaver that doesn't seem to connect to anything yet it has a hole on the end of it that looks like it should connect to a pin or a spring, or possibly a roller. it currently just sits there and rattles around. Have a look on the following photos and you will see what I mean.
I have purchased a parts book on ebay which should answer my questions but it is currently caught up in the postal strike in Canada so I don't know when that will turn up.
Any help greatly appreciated.
Paul.

 

[askinner]

Hi Paul, did you get this sorted? I too have exactly the same lever hanging there on my 7245, like it is missing a cam roller or something? My draft control doesn't seem to be working very well. Does anyone have any photos of this linkage connected to anything? I have had a search around in the bottom of the housing to no avail.

Cheers,
Aaron.

 

[prestonpaul]

Hi Paul, did you get this sorted? I too have exactly the same lever hanging there on my 7245, like it is missing a cam roller or something? My draft control doesn't seem to be working very well. Does anyone have any photos of this linkage connected to anything? I have had a search around in the bottom of the housing to no avail.

Cheers,
Aaron.

Hi Aaron.
I am still working on the problem. I now have a parts manual (bought another one, the one I bought from Canada STILL isn't here!) and if you look at the image below, I believe it is item 80:
change over pendulum and there are no rollers shown in the parts book so I think that is how it is supposed to be.Sorry i cant help more. I've included all the pages from the parts book that show the internal mechanism in case they are of some help to you. Apologies for the image size, but I think you will need the higher resolution to see them well.
All the best.
Paul.

 

[askinner]

Thanks for that Paul, I ended up coming to the same conclusion, as I couldn't find anything in the bottom of the box, and it hadn't been apart before. I ended up pinpointing the draft control issue to the torsion bar sagging. I also resealed the whole zetormatic valve, cover, cylinders and controls, and adjusted everything up. I now have a system that is entirely leak free, and works like it did from factory.

Cheers, Aaron.

 

[prestonpaul]

That's good to hear.
You want to come and do mine for me? it's doing my head in

 

[grumpy6711]

pm sent

 

[askinner]

Hi Paul, let me know what part you are still having problems with, I completely stripped mine back to a bare housing and rebuilt, so I may be able to help . I would love to come over and help, but unless you are in Australia, that might be a bit difficult!!

Cheers, Aaron.

 

[prestonpaul]

Hi Aaron. Surprisingly enough I am in Australia The tractor is located in Kennedys Creek which is about 30 km inland from the 12 apostles & Great Ocean Road. I have it back together and running at the moment, The three point linkage is working but I suspect not as it should, I have a feeling that the valve for the TPL is in backwards. I put it back in as I found it but I am not the first person to be in there so who knows how long it's been like that. I stripped the valve assembly section by section as I didn't feel confident to go back to a bare housing as you did. However the parts manual I ordered from Canada arrived a few weeks ago and the images are much better than the ones I posted above so I think I could quite confidently totally strip it and re assemble with out a problem now. I might delve back in for another look at a later date. The water pump failed on me today so I have other fish to fry at the moment
Paul.

 

[tractorman_6_]

were is the hydraulic filter o nmy zetor 6011