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Ford 3000 hydraulic leak

R

Royse

Well-known Member
Trying to get the 3000 ready for snowplow duty and I have a
pretty good hydraulic leak on the right side at the rear of the
foot rest. Its been there a while and is dirty, so hard to pinpoint.

Seems to be right where the lines attach and the brake rods
go through the case. I cleaned it again tonight so hopefully
I can tell exactly where it is coming from tomorrow night.

Is there a common cause of a leak at this location?
It leaks while setting overnight with no pressure on it
and does not seem to leak any faster under pressure.
No oil spraying out or anything like that. Just a leak.
 
Probably where the pressure (narrower) line goes into the side of the center housing. There were two different style tubes. The early ones had both tubes as part of a single assembly with a manifold on the end that attached to the side of the center housing. The later style had two separate tubes.
 
Thanks Sean, I should have specified the year knowing there
were differences. This is a 1974. The lines are separate.
The smaller one looks like it fits into a plumbing bushing in the side.
 
The parts drawing shows a 90 degree fitting that screws into the center housing and just an o-ring on the end of the tube that goes inside the 90 degree fitting. Hopefully it's just the o-ring that needs replacing.
 
If you're looking at the online parts manual, mine looks like
the one listed under (10A01) - HYDRAULIC PUMP ASSEMBLY, 2000,
3000, W/INDEPENDENT PTO, 4000 EXCEPT W/INDEPENDENT PTO"

[b:3f0d98d2f1]Part 70[/b:3f0d98d2f1]
 

Could it be the brake shaft that goes through the rear diff case.
There is a radial seal on that shaft that does wear out over time and will leak from just sitting.
 
Sorry, I was tired last night when I posted that and was looking at the suction line in the parts drawing instead of the pressure line. I had just gotten home from being at the hospital all day. My wife had knee replacement surgery yesterday morning and I was up early and got home late.

Number 70 in that drawing is correct. It is a kit that has 3 parts in it, a large fitting that is threaded on the outside and inside, an o-ring that goes behind the large fitting, and a small fitting that slides onto the tube and threads into the inside of the larger fitting. It works like a compression fitting, but sort of in reverse. The small fitting threading into the large fitting causes the small fitting to compress down and squeeze on the tube. You can try tightening the smaller fitting to see if that will stop the leak, but if not you should buy the kit and replace all 3.
 
No apology needed Sean, I appreciate your help.
I wish your wife a speedy and complete recovery.
 
"Could it be the brake shaft that goes through the rear diff case."

Yes, I suppose it could. There was enough oil under there that
had gotten blown around, etc that I really couldn't tell yet.
Hopefully I'll be able to tell now that I've cleaned it off.
 
My 3400 was leaking at that same spot, I was hoping it was the brake cross shaft seals but it turned out that the hyd lines were pitted and rusted through. Lots of sand/mud caked under the floorboard held moisture on the lines.

I pulled them and welded the holes up. Posted a writeup on it last year if you do a search.
 
"hyd lines were pitted and rusted through"

Bite your tongue sir! I certainly hope not. ;)
It had leaked enough by the time I got home from work that
I really couldn't tell for sure again so I decided to try simply
tightening the fittings. I got about a half a turn with little effort.
I know, seems like a simple thing I should have tried first. Duh.
I'll check it again tomorrow and see if that was enough.
 
I should note that mine was the earlier flange style where it's all one unit.

I've heard that the later compression nut setup never rust :)
 
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