Securing your MTVR? anyone installing locks? ignition keys?

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MTVR

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The $20 locking fuel cap works.

Sloan part number 431006. Free shipping.

And unlike the other locking fuel cap part number floating around somewhere, this one is unvented, so you don't need to swap gas caps when fording water.

The ebay seller ("vinrei_30") told me he had more of them to sell, but I can't find a current ad to link here.20200429_125408.jpg
 
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simp5782

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The $20 locking fuel cap works.

Sloan part number 431006. Free shipping.

And unlike the other locking fuel cap part number floating around somewhere, this one is unvented, so you don't need to swap gas caps when fording water.

The ebay seller ("vinrei_30") told me he had more of them to sell, but I can't find a current ad to link here.View attachment 798262
Do yourself a favor and cover those little pot metal pieces with silicone. They will rust thru very fast. Typical on m939 trucks and they will turn blue in the inside due to the brass


The aluminum cap your truck came with is available with a lock. Available in brass or aluminum



 

JonM934

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I started a thread on fuel tank caps. I suggest you also cover the key way because water and junk can get in there. Mine got water in it, then froze, and then I could not get it off.
 

MTVR

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Aluminum and brass = corrosion

Put brass and aluminum together in a saltwater environment and watch the magic work
I have more experience with electrolysis than I have with galvanic corrosion.

Will the tank be okay with this cap as long as I stay out of the ocean, or is this going to be a problem?
 

simp5782

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I have more experience with electrolysis than I have with galvanic corrosion.

Will the tank be okay with this cap as long as I stay out of the ocean, or is this going to be a problem?
This fuel cap is 500 miles from the nearest ocean.
 

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MTVR

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Okay, aluminum Velvac key-locking non-vented fuel cap, with key hole cover to keep rain water out. $21 including shipping.20200507_125644.jpg

...and fortunately, there was no corrosion from the brass Sloan key-locking non-vented fuel cap, which has now joined the "spare parts" pile, unless somebody else wants it...
 
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Elijah95

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What about your fuel drain on the bottom of the tank? I’ve always been scared to install locking caps because peckerheads around here will just drill a hole then I have to remove, fill it with water, weld it etc.

Is the cap to prevent crude tampering or fuel theft?


Sent from my iPhone using Tapatalk
 

JonM934

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I put on a locking cap for both reasons. I know it is simple to defeat but the truck is kept right by my house so all I have to do is slow them down with a little bit of discouragement and they will go find an easier mark. Like my tractor- it does not have a locking gas cap. BUT there are three cameras watching it - all in plain view plus the tractor parking space is even closer to the house and VERY well lit. The place I park the 7 Ton has motion lights.
 
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