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Old 10-09-2014, 06:06 PM   #1
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HWH Solenoid Issue

On HWH leveling jacks, straight type, non pivoting. The solenoid valve has separated in the hydraulic manifold and the front of the valve is still in the manifold. . Anyone know how to take the solenoid valve head out of the manifold once you screw out the valve?

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Old 10-10-2014, 03:23 AM   #2
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Activate the pump for a second; the pressure should push it out. You will have some fluid be pushed out rather violently so cover things up and you should be fine. Keep us posted on how it goes.

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Old 10-10-2014, 09:24 AM   #3
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HWH Solinoid Issue

Thank you, I will try that and let you know if it works.
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Old 10-10-2014, 12:03 PM   #4
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The nose of the solenoid, where the orifice and seat are, has an O-ring. This ring can stick in the manifold. The rear of the solenoid, where the needle and electrics are, threaded to the nose and to the manifold.

When you unscrew the solenoid from the manifold and the O-ring on the nose sticks, you end up unscrewing the nose from the body of the solenoid.

When this happens, you need to push the solenoid back into the manifold and give it a couple of turns. You want it to catch the threads on the nose piece without threading into the manifold.

Once you manage to do that, pry the solenoid away from the manifold. It should pop out with the nose piece. I've done this, it works.
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Old 10-10-2014, 03:31 PM   #5
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Thanks, I found a cleaner and easier solution. Remove the corresponding hydraulic line to the solenoid valve, insert steel pin/drill bit and tap on the bit. The solenoid valve head stuck in the manifold pops out, clean and no mess or fuss. Reattach the hydraulic line and proceed to replace the solenoid valve. Thanks for the recommendation. I now have two methods of repair/replacement. Thanks again.
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Old 10-11-2014, 12:20 AM   #6
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Just out of curiosity do you still have the old solenoid head. I was wondering if you could have taken a magnet and let it stick to the valve shaft and pulled it out. It has to be a material that a magnet can attach to. I think it would use a rare earth magnet but as I said I am curious if that would have worked.
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Old 10-12-2014, 12:12 PM   #7
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Do not think this will work. It seemed to be stuck pretty good. The rod/drill bit is clean and guaranteed to work.
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Old 10-13-2014, 11:28 AM   #8
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I do not know if it would work or not. A rare earth magnet has a pretty stong pull. It would be easier and cleaner than the rod drill bit method.
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Old 10-20-2014, 01:56 PM   #9
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stuck seats

I had to replace all four of my jack solenoids due to overheating. 3 of the 4 seats were stuck so bad I had to sacrifice one on the valve bodies to make a seat removal tool. See the pics below.

I ground the OD threads on the body so that when I screwed on the seat the OD threads would not get in the way. These seats were stuck so deep that the internal and external threads engaged at the say. It took some pretty good prying on the valve body to remove the seat.

Can't use this bodt for a rebuild any more, but the other three can be.
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