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-   -   HWH 220 lbs. pressure switch (https://www.irv2.com/forums/f258/hwh-220-lbs-pressure-switch-548478.html)

Chief Deputy 08-05-2021 04:47 PM

HWH 220 lbs. pressure switch
 
Good afternoon all,

Has anyone replaced the HWH 220 lbs. pressure switch? Through some help from AZPETE, I was able to determine my driver side front leveling jack had a bad pressure switch.

The automatic leveling has not worked properly since I purchased the coach this past March from a private owner. When I press the auto level button, the air dumps and the auto level process begins. The system then levels the coach but then continues to unlevel and relevel over and over. Manual level works just fine. I'm not lazy but if the coach has a feature I'd like for it to work. AZPETE told me how to test the pressure switch and sure enough the front driver side was bad.

I received the pressure switch from HWH within a few days of my order. My coach is leveled, I placed jack stands under the front just to be safe. Disconnected the single wire plug and started to unscrew the bottom brass fitting. As I did a small amount of fluid leaked out and I immediately tightened it back.

I searched this forum and YouTube but was unable to find anything to walk me through it. I assume the jacks have to be retracted, right? Since the fitting is on the bottom of the jack, can I assume there will still be fluid leakage? I did find in the HWH manual for the 725 Series that there is a special oil for these jacks that only comes from HWH. They add that in an emergency to use Dextron ATF. What do ya'll use?

I've leaned a great deal repairing things myself and enjoy the projects. Any guidance is greatly appreciated.

gjames50 08-05-2021 09:18 PM

Here are some instructions from HWH. It's pretty universal, you just don't want your system pressurized when replacing the switch and you need to be able to run the system afterwards to get any air out of it.

Ignore the pressure increase part of the instructions. Unless HWH instructed you to do so.

Here's that link: https://www.hwhcorp.com/ml47649.pdf

gjames50 08-05-2021 09:25 PM

Also here is the service manual for the HWH 725 Series: https://www.hwhcorp.com/ml48380.pdf

azpete 08-06-2021 12:29 PM

if you have questions, my phone is always on. dont try to replace parts when the system has pressure on it.

the room system is separate from the leveling system, as far as pressure is concerned.

if in doubt, pull rooms in and depressurize all.
paul maddox

Chief Deputy 08-07-2021 04:46 AM

Thank you both.
Our local RV repair shop will replace it or $120. I’m sure it’s not that difficult but having them do it and talking with the technician will provide me the info I need to do the next one.

azpete 08-09-2021 10:54 AM

retract your jacks. that relieves the pressure.
disconnect the single electrical plug at the top of the jack.
cut the small zip ties holding the switch wire to the jack housing
using a 3/4 wrench, screw the switch out, and install the new one. plug it in at the top and run the jacks.
if that solves the problem, install new zip ties to hold the wire to the jack housing.
yes, it will take close to 1/2 hr to an hour to replace it, so the shop is not out of line on pricing, but you can do this yourself
.paul maddox
i work full time for hwh corp. i do not solicit part sales on this forum.
i do not do service work anymore.

Chief Deputy 08-10-2021 05:15 AM

Quote:

Originally Posted by azpete (Post 5866532)
retract your jacks. that relieves the pressure.
disconnect the single electrical plug at the top of the jack.
cut the small zip ties holding the switch wire to the jack housing
using a 3/4 wrench, screw the switch out, and install the new one. plug it in at the top and run the jacks.
if that solves the problem, install new zip ties to hold the wire to the jack housing.
yes, it will take close to 1/2 hr to an hour to replace it, so the shop is not out of line on pricing, but you can do this yourself
.paul maddox
i work full time for hwh corp. i do not solicit part sales on this forum.
i do not do service work anymore.


Paul,
I got that far the first time I attempted it myself. With the jack retracted, will the jack fluid leak out when I remove the switch?

azpete 08-10-2021 02:15 PM

not enough to worry about if you install the new part when you remove the other one.


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