Hydraulic oil in clutch housing on an 860

cydectin

Member
I will try to make this short. Hauling wood on the trailer yesterday and noticed oil coming out of flywheel keyhole plate. It is not engine oil it is hydraulic oil as
that compartment is low. Checked weep hole at the bottom and it was plugged with grass and crap from summer as it was open at the start of spring. Last winter I put in a
new clutch and transmission seals. Transmission is checking fine and hydraulics checking low. With oil coming out of flywheel keyhole I am guessing the clutch may be crap
now. My searches on here have found that it could be either pressure or sump hydraulic lines that run through the clutch housing. What else could it be? Don't think it
could be the seal on pump unless seal blew building pressure around drive gear plate gasket and then is running down into clutch housing. Only thing I know to start would
be to leave tractor on the level, refill hydraulics and see if oil continues to weep.If it doesn't weep it would be something else. Any help or suggestions will be
appreciated.
 
If your transmission is filling up with oil its probably the tubes and pressure is pushing it out the input shaft. If the leak is in the space where the weep hole is its probably leaking there. You can pull the weep hole plate, jack up the front of the tractor and if it flows from back to front your leak is in that area. There are more posts on here about this. Just type in the search bar Ford hydraulic tubes, when it resets click search again and it will show you old posts. Im looking for the tubes for a 5 speed 4000 if anyone out there knows where to find them. Im pretty sure the tubes are different for 4 and 5 speeds. Good luck with that problem.
 
Thanks for reply. Took cover off of bottom and finding some metal filings. Think something happened to clutch, pilot bearing, or throw out bearing and may have damaged tubing. Teardown slated for December.
 

If the pump drive plate gasket were leaking it would be engine oil,

I don't know how the hydraulic tubes run through the casting in an 860 bell, but believe they should be totally encased within the casting on that tractor. If so, that would mean pretty significant damage in the bell housing to have fluid coming directly from the hydraulic section to the bell housing weep hole.
 
No, it has the drive in suction and pressure lines. Fired tractor up this morning after it had a chance to drip all night and hydraulic oil coming out bottom inspection
plate. It seemed to be coming from the back of the plate. Looked up in there and could not see where oil was coming from. What concerns me is I put in a new clutch,
pilot, and throw out bearing in January of this year and everything was fine. I had clutch housing completely clean and there seems to be alot of sludge with fine slivers
of metal.
 
I forgot to tell you, that weep hole is supposed to have a cotter pin in it to keep the hole clean and bugs out. You need one big enough so weeds wont pull it out. Easy to put in with the legs down while the cover is off.
 
I cant say anything about the slivers. It could be the suction tube leaking from a rust pinhole if its not too bad of a leak. Quite a few people on here have dealt with these in various ways without splitting. Heres a post on the size of the tubes. Re: hydraulic oil overflow from transmission in reply to tgathright, 02-28-2013 10:29:35

Quoting Removed, click Modern View to seeActually 3 places are press fit. . It has 3 press fit diameters, the front end, back end, and one in the middle. The rest of the tube is in open space. The smallest end (rear)is .485". The center is .495", and the big end is .505".
 
I just ran into this problem on my 57 ford 740 and wound up being the hyd. pressure line that runs thru the transmission. I first did a lil air test to be certain. After i split the engine and tranny apart and tapped the small line with a 7/16 tap and used a long barrel socket and a bolt to make a puller. Worked great!
 

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