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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Fuel lock ring help!

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Old Jul 19, 2010 | 11:02 AM
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Fuel lock ring help!

I have an 1985/86 Cab and chassis F-350 with an O.E.M. plastic rear tank and need a new lock ring. The local dearer is no help, Says that they never used a plastic tank then. The truck has 31,000 orginal miles and I'm the second owner. IT's had NOTHING changed since new except tires! Until I've owned it.

Can anyone come up with a part number for me?
 
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Old Jul 19, 2010 | 02:01 PM
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I guess a lockring for a metal tank won't work? I have never messed with a plastic tank. The local stores sell the one for the metal tanks.
 
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Old Jul 19, 2010 | 02:06 PM
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Check with Archion, he may have a source. My service manual does mention both plastic and metal tanks.
 
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Old Jul 19, 2010 | 04:14 PM
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No the plastic one looks like a ring for a old mason jar except thats its made of plastic... the metal three tab type just wont work. I'm going to try a junk yard later this week to see if I can find anything close from something else.
 
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Old Jul 19, 2010 | 06:25 PM
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The lock ring for the plastic tank unit is made from unobtainium, the salvage yards are your best bet.
 
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Old Jul 20, 2010 | 09:37 AM
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Is this the right locking ring you need?

Sending Unit Lock Ring, 3 5/8"

This is for an aftermarket plastic rear tank. Don't know if it fits the factory tank or not.
 
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Old Jul 20, 2010 | 11:44 AM
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Check out item #3 on this page from LMC

LMC Truck Parts - Page 53

Wrong years and models but should work for ya.
 
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