hey every one im new here i have a 76 f250 4x4 with 400 on propane the problem im having is that i i can not get the propane from the bbq tank threw the cheater hose it wont go in the filler on the truck the truck is not out of propane dose that matter and my bbq tank is half full dose that mater or any other point im forgeting or places i should be looking to fix or replace i will take any other opinons
Your BBQ tank is vapor out to transfer the gas from it to your motorfuel tank you would have to turn it upside down HOWEVER new 20# cylinders have an OPD Valve (overfill protection device) that WILL NOT allow that to happen. Take it to a dealer and get it filled.
I've only ever had to use a cheater line twice, and both times I turned the bbq bottle upside down and above the main tank to fill it. Otherwise you're just balancing the pressures in the tanks and will never empty your bbq cylinder.
Edit... Didn't know about the OPD valve on the new cylinders. Been a while since I've needed to cheater fill. I'll keep my oldest bbq tank full for emergencies. To the OP, get a reliable gauge on your tank and never worry about filling your truck on the side of the road.