JL Sargent
Senior Member
I wonder if Skip has open center hydraulic system and Boone has closed.
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310E diode locations
- Thread starter SkipBurney
- Start date
Pretty sure they're both open center. The valves have power passages that allow oil to pass through even when not in use. I did find a diagram of how mine is plumbed which shows the inlet from the pump and outlet to the filter housing. But I don't see Skip's version in the manual.
On edit: This picture is from the SE service manual. Guess there is a separate manual for the E?
On edit: This picture is from the SE service manual. Guess there is a separate manual for the E?
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JL Sargent
Senior Member
The E is different. A main hydraulic pump is mounted to the transmission charge pump and that main pump supplies fluid/pressure for FEL, stab, and backhoe functions straight away. There is no unloading valve (20) as pictured above. There is no aux hyd pump (3) as above.
I just tried to go to John Deere parts to look up the SE hyd pump and the site is unavailable at this time. I've always thought that the "E" was an open system while the SE was closed.
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JL Sargent
Senior Member
This picture shows how the main hydraulic system is plumbed. Just that one pump on the back of the transmission charge pump.
SkipBurney
Well-Known Member
That’s how mine is plumbed just like the diagram Sarge posted
I see what you're saying now JL and that picture helps to show the differences. I now see two main pump diagrams in the parts manual, one for the E and one for the SE.
That's a bummer, Skip. Your options seem limited unless you can re-repair your existing valve or find a used one.
That's a bummer, Skip. Your options seem limited unless you can re-repair your existing valve or find a used one.
SkipBurney
Well-Known Member
Well I dropped the old one off at the machine shop today to have the o ring sealing surface skim cut flat. My friend at the shop said he has cut several of them over the years to true them up. You could see where it had been leaking past the o ring and I figured if they had done all that brazing on the other side they may have warped it just enough for it not to seal up. I want to use the outlet valve I got from Wengers but I am afraid it is isnt right or if that is the inlet side of my machine it may mess something up when I start the machine up.
SkipBurney
Well-Known Member
So I’m wondering if that side with the big metal pipe is the return or supply. The line from the pump comes in on the right side of the valve blocks and the leaking block is on the left side of all the valve blocks. I’m tempted to try it but I don’t know what might happen
SkipBurney
Well-Known Member
SkipBurney
Well-Known Member
Well it sprayed just as bad as before, I took off all of the brass found a bunch of big spiderweb cracks. I have removed all of the fittings and am making a 1/8 thick doubler plate to cover the entire side and I will TIG weld all the way around it. Then I will TIG weld it all the way around the edge of the bushing thats in the bolt hole and re drill the hole. I`ll keep you posted
JL Sargent
Senior Member
Well my goodness. What a pain.