ronjin

My picture from several years ago when I had problems with one of my spools.

Here is a picture of one of the spools in the control block.  I suspect that you need to replace the o-rings.

If your JW03 is the same as mine shown in picture 1, you should be able to disassemble it as in picture 2 to determine the leakage point(s). Picture 3 is an exploded view.

Is it leaking all of the time when the pump is running or only when you perform certain operations?

Larry,

This is a post that I grabbed from another tractor site some time ago.  I have used it for bolts and it worked for me.  I offer it as a possibility for soaking the valve.  Let me know if it works for soaking if you decide to try it.

RonJ

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Anyway, I have just changed all 48 flails on my flail mower in the space of about 1 hour, a job that last time took closer to 3, using WD40. I mixed the acetone and ATF 50/50, mixed it into a mayo type liquid and painted it on to the bolts with an old paint brush, few hours to let it sink in and the bolts come off no problem

It really does work and is a great home brew farm fix to an old problem. Give it a go – hopefully you can get Acetone, it's sold in supermarkets here in France

Penetrating oil ….. Average load

None ………………… 516 pounds

WD-40 ……………… 238 pounds

PB Blaster …………..214 pounds

Liquid Wrench …… 127 pounds

Kano Kroil ………… 106 pounds

ATF-Acetone mix… 53 pounds

The ATF-Acetone mix was a “home brew” mix of 50 – 50 automatic
transmission fluid and acetone.
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As discussed in a previous thread on the ATF/Acetone solvent…the biggest problem is containing it..you really need a sealed metal can or glass jar…I use a pump type oil can and fill it from a jar as the acetone evaporates from the oiler…

Let’s see if I can manually enter it:

http://www.tractorbynet.com/fo…..ost3457278