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Case Tractors Discussion Forum
Show Parts for Model:

Re: Need help with JI Case 310 power steering

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Aric Datesman

01-29-2013 10:26:11
68.80.3.95



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oldproudvet said: What's a TLB?


Sorry, thought I got that term here... Tractor / Loader / Backhoe.
If you're is a 310B, it's likely the same as mine but a year or two newer. I picked it up because I need to redo the 250' of French drain I hand-dug in November due to it ending up not being a surface water problem, and there's no way I'm hand digging it 5' deep, in January, in SE Pennsylvania. So far I've put 10 pounds of E7018 stick electrodes onto the backhoe to repair some really badly done "fixes" (cut out the whole mess of it and repaired it properly) and have redone both the fuel and ignition systems. Would be well on my way to digging were it not for it being impossible to steer with a full front bucket...

Anyway, I found a 1950's vintage US Army training video last night that explained power steering and spool valves, so I'm a bit further there. Looks like the flow I'm seeing with the valve centered is appropriate, so will poke at that further when the new seals arrive tomorrow.

Last night I did a bunch of drawfiling and stoning on the pump housing to get a better sealing surface, but that ended up dropping the depth of the bore for the gerotor a couple thou under the thickness of the gerotor and it would bind. So today I chucked the housing up in the lathe, faced the housing properly and then recut the bottom of the bore to allow 0.001" clearance for the gerotor. Total PITA since I don't have a suitably sized 4-jaw chuck and the bore is offcenter from the shaft, but got it done. Since I'm waiting on the spool valve seals and happen to have an appropriately-sized piece of ground rod, I'll be making a new pump shaft this afternoon. The original is horribly scored, so figure I may as well fix everything at this point. Guess that means I'll be pulling the pump shaft seal as well and trying to find a replacement... Ugh.

-aric.
This post was edited by Aric Datesman at 10:29:54 01/29/13.

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