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Old 08-11-2022, 02:57 PM   #1
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HWH Hydraulic slides more reliable?

After all the thread traffic, I thought the electric slides and motor were the issue to be avoided. Monday am in Asheville, time to move but hydraulic slides don't work and jacks wont raise.

Long story short, seems to be a solenoid failure on the hydraulic system. Those white switches in the first pic release the hydraulics and let the leveling jack springs retract the units.

The fun part was crawling underneath the front of the coach in the rain, shorting the Solonoid posts on the intermittent duty side with a screwdriver while yelling at the DW to hit the switches to pull in the slides.

Remember the sparks doing these things when we were young. So much fun.

Final pic is the $5 tool that saved my butt.
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Old 08-12-2022, 02:09 AM   #2
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So, did you replace both solenoids or just the one? I replaced both as they were the same age and wear pattern, and 22 years old.
These 12V solenoids are listed as dump trailer solenoids on various internet websites.
TIP; take a few pictures of the wiring before disconnecting anything, it really helps during reassembly. Been there done that.

BTW, if you ever need to replace the motor, this is a direct replacement:

https://northernhydraulics.net/index..._detail&p=1313 , plus it has sealed bearings instead of the OEM oil-lite bushings. Makes the motor very quiet running.
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Old 08-14-2022, 08:53 AM   #3
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the old upright solenoids get brittle from heat. as they age, just twisting a nut on them will break the plastic. i would replace both the master and pump relay.
the master is a continuous duty and the pump relay is intermittent duty.
not using the right solenoid will result in early failure.
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Old 08-15-2022, 01:49 PM   #4
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This is a 2021 Coach. I'm surprised at such an early failure and concerned there is a deeper problem. We will see.
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Old 08-15-2022, 03:24 PM   #5
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I had the intermittent duty solenoid fail on my 36LA HWH after 2-1/2 years. Easy job so I replaced both and I also carry a spare continuous duty solenoid which, in a pinch, will substitute for either.

I had an old Ford Galaxy once. As soon as I saw the solenoids hanging off the side of the pump motor I went for the screwdriver in the toolbox.

Paul
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Old 08-15-2022, 03:37 PM   #6
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Quote:
Originally Posted by mtflybox View Post
This is a 2021 Coach. I'm surprised at such an early failure and concerned there is a deeper problem. We will see.
It's not too unusual, our master solenoid failed at just over a year old. The contacts inside can get corroded or burned and fail to connect.
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