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Propane frosting

F

fish3x

New User
I have a Minn. Moline G1000, propane, the regulator and the line past the regulator severely frosted up last fall. Ideas on what my problem is and what to do to solve. Thanks
 

cvphoto312.jpg
 
(quoted from post at 19:00:01 04/06/20) Must've been a VERY humid day!!

Compressed LP Gas is like many other gasses, and gets extremely cold when pressurized. Ultra-purified LP Gas is even used as a refrigerant in many newer automotive A/C systems. It's even supposed to be compatible with somewhat older systems, and it takes less to charge than if using R-134a.

Check this out:
https://www.amazon.com/gp/product/B008WA7E36/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Click to expand...
un- un-pressurized, as in releasing pressure.
 
It takes energy to convert a liquid to a vapor, the reaction will get energy from somewhere.
 
Not a flame (not a pun) The propane as a liquid is under pressure to keep it liquid. The pressure
changes with temperature. The hotter, the higher the pressure, the colder the lower the pressure
until it just stays a liquid at -42 degrees C at 21 degrees C it has about 853Kpa. It stays a
liquid at -42 (I have had a propane torch that was full so cold nothing would come out -47F in
Montana. When the liquid turns to vapor, is when it gets cold. My son worked in propane for years
and had a customers hose crack when filling a tank, and propane froze his elbow near the crazy bone.
It is still scar tissue. Jim
 
Does it have coolant hoses connected to heat the regulator?

If not, are there connections to run coolant through it?

If there are hoses, are they hot to the touch? If they are cold, there is no circulation. If only warm, the thermostat may be stuck open or missing.
 
I would check the vaporizer and the engine temp. The liquid propane when running on liquid is vaporized by engine coolest in the vaporizer (heat exchanger). A plugged vaporizer or low engine temp would not supply enough heat to the liquid propane. If the tractor run ok and has good power It maybe just how it is when the relative humidity is high.
 

As cheap as 134 is why would anyone use that stuff...

When 134 came about they came out with blends to use in R12 systems as a R12 plug and play drop in most all of it was 134 whooda thunk it...

If you are temped don't go there...
 
Time to rebuild that converter. It's letting the gas thru at tank pressure. A little frosting while the engine warms up is normal but not like that.
 
All the propane systems I have been around are heated by the engine hot water to turn the liquid to a gas. Stan
 
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