E47m Removing Crossover Valve Assembly

[wsmm]

My plow won't hold angle. I think it must be the crossover valve, because if I disconnect the hoses to the angling cylinders from the pump it will hold it's angle. Tried taking it apart, but I can't remove the plug. Would it be okay to heat the plug to try and get it out so that I can remove the rest of the assembly.

Thanks..
Bill

[apkole]

Are you sure you don't have an issue with a cylinder, such as worn packing or a leak of some kind? What about your hoses and quick disconnects?

We've used the E47H in the past, and still have one going on our 78 CJ7. Haven't ever had an issue with the crossover, not to say it can't happen, but there really isn't much to go wrong in there . . . . just a spring and the valve pin. Unless some contamination got in there.

Don't know about heating. That's an aluminum block. Be careful.

Andy

[BRL]

Now that apkole mentions it, I can't remember ever having to replace a cross over over years of using several different pumps. I would check the C valve for dirt or bad O-rings or try replacing the coupler sets first, as I have had them cause similar problems in the past.

[wsmm]

Have cleaned the c-valve. Do not believe it is the couplers as with the hoses disconnected from the pump the plow will hold angle. Also if the plow is angled to either extreme you must manaully asssist it while holding the angle switch to get it to move. Once in motion it will continue to move, but you can stop it at any point by pressing against it with your hands.

[apkole]

We were having some issues with one of our E47H units a week or so ago. We did tear down the unit, but no help. Then we replace all (A, B & C) valves with new. Still marginal operation. It was THEN that we discovered a bad ground point on the unit. The ground bolt at the back was corroded.

I cannot stress enough the need to have a solid, clean, well connected ground and hot lead to the unit. Those solonoids want to see a solid current path. We were showing voltage (test light) on all valve operations, just didn't have the current capability.

Make sure you check grounding at the vehicle as well as at the pump. Same goes for the hot side. Connections good? Don't forget to check the actual cable to crimped/soldered connector. Green is not a good color for copper, especially when needing power transferred.

Just another idea.

Andy