Onto spring and the next big project in prep for summer adventure trips. Over the past fall and winter I'd collected an OEM sub tank "kit" from Nick M., a fellow Canadian cruiser guy. He hadn't even opened the box since it came from Aus so it was a bit of a mystery when I opened it up.
It was "apparently", (what Nick was told) a gasser sub tank setup with a diesel style dual filler neck. Nick had sent me a spare gas sender pump, and I had purchased a new oem gas transfer sub tank button (84560-60020). In reality it had missing bits but also had parts from both gasser AND diesel setups. The tank itself was a gas tank with the built in lift pump. It had soft hoses from both setups, but the hoses were kind of crusty and old. It was missing all hardlines except the filler hardline. It had both oem diverter valves, both sending and return, for the diesel setup. It had the diesel sub tank filler neck (Nick had made sure of that). It had one of the brackets that hold the hardlines for the diesel setup (but no hardlines). It had no bracket for the two solenoids. It had no sub tank brackets (was warned of that). The tank itself was in great shape inside and out.
I was super happy to see the diverter valves and upon verifying they actually worked, I changed course and decided to do the oem Diesel sub tank setup design instead.
I used some spare oem connectors to make pigtails for the solenoids, and Brock S. made me a fancy cnc cut bracket for the two, which bolts into the bottom of the body of the truck into 2 factory captured nut holes, near the cross member directly behind the main fuel tank.
A couple things I found out that are worth mentioning,
The gasser sub tank has a slightly smaller fill hose. Not just the filler neck portion, but the actual soft hose and the hose end on the tank too. Turns out Gates has a product line of flexible fuel filler hoses and I managed to buy one that worked.
Flexible Fuel Fill Hose | Gates Corporation - https://www.gates.com/us/en/fluid-power/engine-hose/fuel-fill-hose.p.4271-000000-000001.html
Since the duel filler neck end was wider than the tank end, I had to use a small section of slightly smaller hose (from the pile of old hoses in the kit) to make a "sleeve" over the tank inlet. Worked great.
The gasser tank pickup also has a lift pump in it. That had to be removed for the diesel setup. I used some fuel hose to bring the hose end down to the bottom of the tank at the same level the lift pump pickup sat at.