4010 Loader Hydraulics

I sent the return line to the hyd filter cover by drilling and tapping a 1/2 pipe hole then after inserting the connector, welded it to the cover. The return line ran under the tractor secured to the brace that runs under the tractor and supports the loader.

Works great; nice clean installation.

Mark

On my 4020, I ran that pressure line to a couple flow restrictor valves (you don't want full flow to the loader ususally and I put on the second one for when I hang a back hoe on the rear) and Pioneer fittings. I use female Pioneer for pressure and male for return that way I always hook them up correctly and can connect the two hoses from the loader or back hoe together to keep them clean when not in use. I drilled the side of my oil filter cover (it is thick aluminum) and tapped it 1/2" pipe thread.

Some say its practical to tap the lines to the SCV valve on the firewall for both pressure and return. I like the scheme I used better, its easier to do. A JD parts man told me about it.

Gerald J.

Flow restriction is a part of the factory SCV valves. They are set to about 5 gpm. The pump is good for 21 or 22 gpm. Getting all that flow to a 3x8 cylinder means it takes 3/4 second for a stroke. And with it taking 3/4 second for operator reaction time, the ends of the cylinder can get knocked loose or off.

At best, without some flow restriction, operating hoe or loader takes sandpapered finger tips, no operator twitches allowed. As you say, "touchy."

I used flow restrictor needle valves (with check valve so they only restrict flow in one direction but in my application they only see flow in one direction) with micrometer adjustment heads that were made by Prince and sold by Northern Tool (also Baum Hydraulics). Allows me and my calloused finger tips on ham fists reasonable loader and back hoe control without limiting the available force.

Some think the flow restrictor valves are for pansies. I think those valves preserve the equipment AND the environment its being used in.

Gerald J.