I have a 1973 Timberline 22.6 ft Travel Trailer. This trailer has a
pressurized water system. I got the system functional, but the guage
reads full all the time. I decided to attemp repair to the sensor,
but the sensor is covered with a grey putty of some sort, and is quite hard. I can only see one screw, in the top of the sensor, but I suspect it is an adjustment. I didn't want to dive into this blind.
I'm afraid to chip all the putty away, to find something I can't deal
with. Does anyone out there have any experiance with these water systems? Thanks.....David In Carson City
Sorry I need more details, all water systems are pressurized at some point. Are we talking city supply? I assume you are talking about your holding tank for the fresh water as we are talking about a sensor. The sensor is usually on the side of the tank with a monitor board inside the trailer. Of course things were done different 35 years ago. The sensors are set at different heights in the tank and as they are shorted by wetness they set the light off on the monitor. Can you post some photos to show me what we are working with. I am sure we can figure it out if we can see it.
NCH
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The older rigs actually had a pressurized fresh water tank in lieu of a water pump... Unfortunately, I never owned one and that's about all I know of them... Maybe Rubiranch or one of our other vintage experts can comment further...
Les
2000 Ford F-250SD, XLT, 4X4 Off Road, SuperCab
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My previous trailer (60's TravelEze) had a pressurized fresh tank, but early on my grandfather installed a small DC compressor in the compartment next to it with a switch inside that he could use instead of the Schrader valve outside on the fill cap. He made some very ingenious mods on the trailer, and I regret selling it for that reason alone.
Sorry I can't help you with the problem at hand, but I think the pressurized tanks were very clever, and when you get it working, you'll probably love it. Just carry a bicycle pump
Dave how does your level sensor work?
My '73 Holiday Rambler has a pressurized system. The tank is pressurized by either adding air at the schrader valve on the water fill cap or by the dc air compressor connected to the tank. The air compressor is controlled by a pressure switch which maintains the tank pressure. If using the valve on the water fill cap I would use a hand pump or small oilless air compressor. There also is an air gauge on the fill cap assembly to show the tank pressure.
I would like to know how the level sensor works so I could add that feature to my tank.
Thanks - Bill T
Bill and Debbie
2000 Chevy HD 2500,6.0,3.73
2003 Nash 25S TT
Exactly, there is an small compressor that pumps air into the tank, and shuts off when at max pressure. The system works well, except for the gauge.
It reads full all the time. The gauge is an analog meter, 100ma full scale.
I suspect and has been eluded to , that it uses a float and a variable pot.
The sending unit is on the vary top of the unit. It is a small black module,
with 2 wire running from it. I only see one screw, and I believe it is a
adjustment screw. The unit is covered with a grey hard putty like substance.
I tried to chip at it, but was afraid to proceed without knowing more.
I suspect there are screws under the putty, but thought I should get more info before proceeding. I was hoping some one else out there had delt with one of these.
I wonder if the putty may be something like Liquid Steel. On my old jeep, with the gas tank under the driver seat, I used Liquid Steel to seal the top of the sending unit. Didn't work very well, still leaked. But it was grey and dried very hard.
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