Re: Re: Re: HELP! JD2030 Hydr. 3 pt Lift (Rockshaft) extremely slow

Posted by Mark on September 24, 2000 at 10:39:17 from (63.25.158.231):

In Reply to: Re: Re: HELP! JD2030 Hydr. 3 pt Lift (Rockshaft) extremely slow posted by Mark on September 22, 2000 at 12:00:04:

(Click the tractor picture to see the beginning of this saga)




Well, I took the side plug out of the hydraulic system
to get at the screen. I saw the screen in there, but
couldn't pull it out, even w/ needlenose pliers. I ended
up pulling the plug out of the opposite side, and pushing
it out from the other side with a punch and small hammer.
once I got it out, I saw that it was stuck in place because
of all of the sludge and debris arount it. There were small
red flakes, metal shavings, even what appeared to be a shaving
from someone drilling through a piece of plastic. The metal
chips varied in size from the types that would come from a
dull drill bit to fine dust. I put the two side plugs and the
two drain plugs back in, and poured a couple of gallons of
diesel into the hydraulic fluid filler hole. I then removed one
side plug, and while the diesel was pouring out, I brushed
around inside with a large bottle brush. I repeated this several
times, then did it from the other side as well. Then I filled
a gallon or so of diesel and drained from the drain plugs to get
any bits that might have scattered. I cleaned the screen thoroughly,
and then, while the fuid was out, went to work on changing a leaky
gasket on the side of the transmission on a cover plate where the
steering column meets the transmission (RHS). When I got the cover
plate loose, quite a bit of water and some hydraulic fluid spilled out.
Once the cover was off, I could see that there was sludge built up to
the level where the leak had been. I scooped sludge out with my hand
for awhile, then rinsed w/ diesel several time. I found that the
compartment had a depression about 1-1/2 inch dia and 1 inch deep.
The depression, I'm pretty sure, is there to act as a sump for
debris. The sludge had been about 2 inches above the top of the
sump. I cleaned and sprayed with diesel (using a compressed air
parts sprayer like this one (Click the Picture Below for Cheap Source)




After all of that, I removed all of the plugs, and let it sit and
dry out overnight. The nest day I put all of the plugs back in, and
replaced the cover on the RHS. I then put in ten gallons of 303
hydraulic fuid, and cranked it up. It seems to work fine now, in
spite of the fact that it probably is down to metal-to-metal on the
brakes, or somewhere else. I asked what a brake job would cost at
the JD dealer, and it's gonna be around $1000. For now, I just have to
use it as-is, since I don't have the time or money to fix or have the
brakes fixed. I doubt that I could do them myself since I don't have
a good way to support and move such heavy components.
The filter that I had & didn't know where it goes: it is an air
filter that fits inside the other air filter. When I removed the
old one, only the outer one was there. Luckily, my local JD dealer
is very helpful with advice and answers.
Thanks to y'all for the help and advice. That, combined with
other types of mechanical experience, makes me feel like I
have a fairly good idea of what the situation is. I'll go on
using the tractor, hoping that the metal shavings are only brake
related. I'm relying on the filters to do their job and keep any
more debris out of critical components (I know it's risky). If
it turns out disastrous, I'll let you know.
'Till then, keep chugging along,
-Mark

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