1986 Chieftain 31 Gallon Gas Tank?

CoreyRay1970

New Member
Joined
Aug 21, 2025
Posts
3
Location
Wichita Kansas
I have 1986 chieftain 31, sits on a JD frame with a Ford 460, I am looking for a Fuel Tank it was a 90 Gallon. original owners son cut the tank out after RV sat for 25 years. I am looking for tank or a blueprint of the tank. and no Winnebago. John Deere, Freightliner, nor Oshkosh, have been any help with anything. thanks more then welcome to contact me here. [Private info removed]
 
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Looking for parts info, just as a test of what might be found and I now see why they might have little to none on hand as that is from the old microfiche files and what they have online is such a poor copy that it is useless!
So what IS the plan for the old buggy? Is it hoped to be used as an RV or is it going into farm service like a hay wagon?
At that age, finding one that has a tank still in good enough shape in a salvage yard is going to be a bit of miracle but might be among the better choices if the OEM tank is actually needed.
I am sure that age group was built on a stripped chassis, so looking for the label might give you some more exact idea of what chassis to chase in salvage yard calls. Have you found that label near the driver's left side somewhere as it lists lots of specs if still able to read it.
going by chassis may open the market for wider searching as RV are often just built on the same chassis as lots of other vehicles like bread wagons, beer wagons or service trucks of some type.
If you can move to finding salvage chassis, rather than an RV, it may open the possibilities a lot more??
 
The frame rails are more than likely set at the industry standard of 34". I think you're probably simply looking for a tank that fits your available width (<34"), length, and height.

I put a newer E450 55 gallon tank in a 20 year older E350 based motorhome. Just bought a tank at a truck junkyard, drilled a couple new holes, and bolted it it.
 

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