Komatsu FG25T-12:
Komatsu FG25T-12, leaking white valve on fuel line before regulator/vaporizer. What is it?

First post here, im not seeing a way to add pics in my post so heres a link

This forklift leaks propane from the white valve in the pics. Its on the fuel line right before the fuel lock off/regulator (havent messed with those too much so i might have the wrong part name). It has a set screw but it appears to just push a diaphragm of sorts down and restrict fuel flow. I suspect the diaphragm failed as it was sitting at the bottom, allowing fuel to go up to the set screw and escape. Tightening the screw doesnt stop the leak, it only lessens it and makes it take a lot longer to empty the fuel line after cracking and closing the tank. My parts department couldn't find anything about it, and they suspect it might be part of some kind of conversion kit. At this point i suspect my best bet is to remove it and either block it's port or swap to a 2 way adapter instead of a 3 way. But what is it? What does it do? It has electrical connections but im not too sure what they do either. Id guess that they are there to move the diaphragm and restrict fuel flow when needed/requested but i didnt see anything electrical inside, it seemed like a purely mechanical part that happened to have some wires attached to it
  • Posted 30 Aug 2023 08:55
  • Discussion started by Mend
  • Texas, United States
Showing items 1 - 1 of 1 results.
That part you are looking at is low fuel gauge there was probably a light on the dash that would come on when the tank was getting low on gas it is probably bad that is why it is leaking you could bypass it or get a new one. It is l believe 1/8 pipe thread.
  • Posted 4 Sep 2023 09:48
  • Reply by Scott_
  • Pennsylvania, United States

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