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HWH Level Sensing Unit

I am trying locate the HWH level sensing unit. I have been told it is located in the basement near the center of the coach, possibly enclosed. I have yet to find it. Any ideas?
Rick and Julie
Grand Villa
Build #4689
1995 4000 U280SE WTBI
8.3L 300HP Cummins

Re: HWH Level Sensing Unit

Reply #1 –
It could be under the bottom drawer by the sink or under the couch
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel

Re: HWH Level Sensing Unit

Reply #2 –
Quote
I am trying locate the HWH level sensing unit.

On our 40' 95 300 it was under the couch on the driver side near the furnace. I'm bettin' yours is there too.
jor

93 225
95 300
97 270
99 320

Re: HWH Level Sensing Unit

Reply #3 –
jor, I think you are going to win the award for taking the most and best pictures when you do anything.  I have done a lot of projects on the last 4 FT that I have owned and I bet I do not have pictures of only a few of them and the pictures are pretty skimpy or only 1 or two somewhere along the way to help me remember how it came apart.
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago

Re: HWH Level Sensing Unit

Reply #4 –
Quote from: jor –
On our 40' 95 300 it was under the couch on the driver side near the furnace. I'm bettin' yours is there too.
jor
Thanks found it. The direction arrow on the top is pointed towards the left rear of the coach. Is this correct? Or should it be pointed towards the rear center of the coach?

Rick and Julie
Grand Villa
Build #4689
1995 4000 U280SE WTBI
8.3L 300HP Cummins

Re: HWH Level Sensing Unit

Reply #5 –
It is my understanding that the arrow should be pointed to the rear and aligned parallel with the centerline of the coach.  I think this is logical so the 4 electrical contact points inside the sensor can distinguish between front/rear and left/right.

The diagram below does not actually verify my theory (about the arrow being parallel to centerline), but the sensor seems to work fine mounted in that manner on our coach.


1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: HWH Level Sensing Unit

Reply #6 –
Here it is on my present coach. It's pointed toward the rear. (Another photo, TurboJack!)  ;D  ;D  ;D
jor
93 225
95 300
97 270
99 320

Re: HWH Level Sensing Unit

Reply #7 –
If the old style mercury level sensor is moved or repositioned for any reason, be careful when remounting.  You want the sensor to "float" on the partially compressed springs.  If the mounting screws are tightened down too much, the springs will be completely compressed (coil bound) and rendered ineffective.  Just leave a little play in the mounting screws so the sensor has space to move on the springs.

For more info on the different level sensors used by HWH over the years, see paragraph 2-13 in the document linked below:

http://wanderlodgegurus.com/database/House/HWH/HWH%20Electronics.pdf

There is also some info in our ForeForums WiKi:

Leveling Sensor Adjustment [ForeForums Foretravel Motorcoach Wiki]


 
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: HWH Level Sensing Unit

Reply #8 –
This reminds me, I need to re-set mine.  It is also under the kitchen drawers.
2000 U320 mid entry  #5688
2006 Jeep Liberty


USMCR retired
SDFD retired
FEMA US&R TF8

Re: HWH Level Sensing Unit

Reply #9 –
For those who have not re-calibrated their level sensor:

Manually level the coach.  I use a long carpenter's level

With the system on, adjust the sensor until all the lights go out.

Level it in automatic leveling.  Fine tune if needed.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: HWH Level Sensing Unit

Reply #10 –
You might want to do like I did.
I couldn't get coach level, so I lifted up the seat portion of the couch and saw, to my surprise and amazement, that some dumbass (no names here please) had put a box up against the sensor that disrupted functioning. It will never happen again! I made and screwed a protective enclosure around the sensor and now no worries.
Nitehawk,  Demolition Lady, & our NEW master, Zippy the speeding BB cat.
1989 Grand Villa 36' ORED
Oshkosh chassis, 8.2 DD V8
2006 Saturn Vue AWD

Re: HWH Level Sensing Unit

Reply #11 –
Quote from: nitehawk –
You might want to do like I did.
 It will never happen again! I made and screwed a protective enclosure around the sensor and now no worries.

I did the same.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: HWH Level Sensing Unit

Reply #12 –
Thanks to all! I remounted the sensor so the arrow is parallel with the rear of the coach.
Rick and Julie
Grand Villa
Build #4689
1995 4000 U280SE WTBI
8.3L 300HP Cummins

Re: HWH Level Sensing Unit

Reply #13 –
Quote from: Rick & Julie –
Thanks to all! I remounted the sensor so the arrow is parallel with the rear of the coach.

Do you mean with the arrow parallel with the LONG AXIS  of the coach and POINTED to the rear?
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: HWH Level Sensing Unit

Reply #14 –
Quote from: wolfe10 –
Do you mean with the arrow parallel with the LONG AXIS  of the coach and POINTED to the rear?
Yes, that is correct.
Rick and Julie
Grand Villa
Build #4689
1995 4000 U280SE WTBI
8.3L 300HP Cummins

Re: HWH Level Sensing Unit

Reply #15 –
Anyone have an idea on where the Level Sensor may be on a 2001 36' ?
 I have looked under the fridge, under the sofa, under the slide out pantry, and under the stove, still looking !
Mark & Bev
2001 U295 36' Slide
Cummins ISC 8.3 350HP
Build #5802
Jeep Wrangler Toad

Re: HWH Level Sensing Unit

Reply #16 –
Reply #1 and Reply #8 (above) on similar year coaches it was located under one of the bottom drawers in the kitchen area.

Could possibly be mounted to the "ceiling" in one of your storage bays.  Start looking in the most central bay and work towards both ends.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"
 

Re: HWH Level Sensing Unit

Reply #17 –
Mark,

On your '01 the coach may be new enough to have the pendulum system.  If so it will be hid in a box with a Lexan cover in the basement next to the slide out control box.

Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."