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706 hydraulic valves: a little more advice please?!

J

jimmyO

Member
Hi all;
I finally got to tackle the leaky hydraulic valves. Getting one of them out was easy enough thanks to a post by Owen Aaland in a thread "auxiliary valve repair 656". The valve diagram in that question is the same as the one for my 706.
BUT...in the diagram, the valve "piston" seems to have a steel ball in a hole. Mine has neither.
In the assembly where the four detent balls are located, I pulled a straight pin out. That doesn't seem to be in the diagram.

Then, I have attempted to follow Owen's instructions, but I can't remove the adjustment screw.It's in the assembly in the last photo. The entire "centering spring actuator" (item 10 in the diagram) spins with it.

Any advice on how to unscrew that little monster? I know better than to use a pliers to hold the actuator...

Thanks,
Jim
a237284.jpg

a237285.jpg

a237287.jpg
 
If I was there I would show you how but hard to explain on here. That one is the latest style also and a little more difficult to repair because the o ring is not on the piston but rather held in the actuator with a pressed in cup. As far as getting that screw out, just clamp the unmachined end in soft jaw vise or even a vise grip.
 
Just my luck, an updated but more difficult part. arrgh.

What part of that actuator is "unmachined"? The part right near the coarse-looking threads? I'm reluctant to do anything that might scratch something, or this could get real expensive real fast.
Thanks for your information!
Jim
 
Pop that sleeve with the shoulder off the part with screw. Watch and catch flying balls. Then you can just clamp down in front of the screw a bit. Won't hurt it unless you completely distort it . Normally they don't come apart like that. The screw and spring comes out while threaded end is still intact with spool.
 
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