explorer ps pump fix!

fablife · Jun 13, 2015

after a crap load of changing, modifying and reading.. weird how some people have great results and some of us have the hard, whining steering. this last build was a super sweet one, so I refused to let it go without a cure, lol
so, it seems the feed is the issue. so here's the easy fix
the return needs to be plumbed into the feed line somewhere between the reservoir and the pump inlet. This can be done with hose barb fittings or drilled and tapped like I did.
it takes a little longer to purge the air out of the system because it's getting recirculated back into the pump, but it definitely works. hope this saves some misery!! JD

DanHall · Jun 13, 2015

Sweet. Looks like a nice solution for dual returns. I'll be in the same boat here in the near future so thanks for posting your fix.

Thebeas · Jun 14, 2015

X2. Thanks!

Bronco73 · Jun 14, 2015

fablife said:
after a crap load of changing, modifying and reading.. weird how some people have great results and some of us have the hard, whining steering. this last build was a super sweet one, so I refused to let it go without a cure, lol
so, it seems the feed is the issue. so here's the easy fix
the return needs to be plumbed into the feed line somewhere between the reservoir and the pump inlet. This can be done with hose barb fittings or drilled and tapped like I did.
it takes a little longer to purge the air out of the system because it's getting recirculated back into the pump, but it definitely works. hope this saves some misery!! JD

Where did you get that reservoir?

fablife · Jun 14, 2015

Bronco73 said:
Where did you get that reservoir?

I made it, it had to clear the hood, and with that motor I was out of options!at first, I had tremendous swirling action in the reservoir, I guess because it was shallower than the original. but since the new return location, that is cured too!

Sabas · Jun 16, 2015

How much for a reservoir like that?

Sabas

garberz · Jun 16, 2015

That seems to be a problem with the Explorer pumps and reservoirs. If you turn up the volume and pressure just a bit, the stock reservoir size isn't big or deep enough to keep the pump from cavitating. While your reservoir has the capacity, it's too shallow, as you mentioned, and the whining is pump cavitation. It's sucking air through the surface of the reservoir level. Plumbing the return directly to the pump and connecting the reservoir with a Tee will work, but time will tell if the fluid will stay cool enough. You've pretty much bypassed the the reservoir the way you have it, and you're not using the capacity of the reservoir to keep all the fluid cool. Adding a cooler will help if you develop a heat issue, because you're also adding more capacity.

Mark

fablife · Jun 17, 2015

you may be right, I think it still is utilizing the reservoir, but I wouldn't run a ps system without a cooler, heat is a killer for most all hyd systems!
I haven't tested this system with a hydroboost or assist. so anyone else can chime in if there are any cures for that too

explorer ps pump fix!

fablife

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