Case 495 Hydraulic Problems

Last week I was brush hogging with the Case 495 and it became really difficult to steer, but the front end loader and the rear lift still worked. I replaced the hydraulic filter thinking that would improve the steering. But after changing the filter I now have no hydraulics at all - no steering, no front end loader, no rear hydraulics, nothing at all. The level for the hydraulic oil is full.

I tried bleeding the lines as the service manual instructed - I tried turning the wheels (they barely moved at all), raising the rear lift (did not lift at all), at 1500rpm for 3 minutes - nothing improved.

A neighbor suggested I clean the pressure relief valve that is found under the MCV - he thought this valve might be stuck open. I have posted a couple of picture of what I believe is this valve at the bottom of the MCV.

Here are my questions:

1. Are there additional line bleeding techniques that I could try?

2. What tool do you use to remove the valve that I have shown under the MCV?

3. What troubleshooting techniques can I apply to determine what could be wrong?

Any help or advice would be helpful!

(reply to post at 19:31:19 06/10/19)

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(reply to post at 19:32:49 06/10/19)

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My brother has 4 or 5 of these tractors and most
have some issues. The ones with the most
problems also have no brakes working. I told him
many times that with these tractors built in
Doncaster England, use one common hydraulic oil
for steering, hydraulic loaders and 3 pth and brakes.
And the hydraulic oil gets hot, and not all hydraulic
oil is able to take high temperatures over a long
period of time. And some hydraulic oil doesn?t have
additives necessary to keep the hot oil from eating
up rubber components, seals , brake parts etc . But
my brother is older and wiser than I , and he would
just buy the cheapest hydraulic oil he could pour
into the tractors. So my thinking is your oil has not
been of high enough quality, or if you have been
fateful and always used IH Hytran, you may have
diluted the hydraulic oil over time by using remote
cylinders that are sometimes used by other tractors.
So my thoughts are oil has started to break down
seals etc . And this stuff is now floating through the
system and bits are sticking in valves and controls.

Is this a CaseIH 495 ? If so .What kind of hydraulic
oil have you been using in this tractor? And have
you had it a long time and know it?s history? My
brother has 4 or 5 of these tractors and most have
some issues. The ones with the most problems also
have no brakes working. I told him many times that
with these tractors built in Doncaster England, use
one common hydraulic oil for steering, hydraulic
loaders and 3 pth and brakes. And the hydraulic oil
gets hot, and not all hydraulic oil is able to take high
temperatures over a long period of time. And some
hydraulic oil doesn?t have additives necessary to
keep the hot oil from eating up rubber components,
seals , brake parts etc . But my brother is older and
wiser than I , and he would just buy the cheapest
hydraulic oil he could pour into the tractors. So my
thinking is your oil has not been of high enough
quality, or if you have been fateful and always used
IH Hytran, you may have diluted the hydraulic oil
over time by using remote cylinders that are
sometimes used by other tractors. So my thoughts
are oil has started to break down seals etc . And
this stuff is now floating through the system and bits
are sticking in valves and controls.

You will get better answers down on the IH forum. Your tractor is 100% IH built.-------Loren

Try posting on the Farmall & IH link as Loren advised.

Joe



https://www.yesterdaystractors.com/farmall/wwwboard1.html

We are currently using the Hydraulic oil that we bought at TSC - we should try to use the specified oil made for the tractor that you have mentioned.