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M116A3 Fix-up & Conversion Thread

CallMeColt

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After thinking about it for well over a year, I made a spare tire carrier.
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Made it with some 2 inch angle iron & a generic Ford Super Duty spare tire holder between the 2 rearward cross members. I'm not a great welder but it should hold up. There is enough room between the rear tool box & the frame to get an extension in there to lower or lift the tire. I plan to use the jack crank from my truck if ever needed. It just clears the metal decking that is over it.

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Goes without saying that I removed the rear kickstand. It just rattled around a lot & I didn't need it. With the fuel & toolbox up front, the chances of it tipping back are very slim. Tried to make it happen & couldn't.

Very happy I finally have a spare on the trailer!

Here is what I ordered;
https://amzn.to/3eA9VcQ - Spare tire holder
https://ebay.us/vCFsoq - Angle iron
 

j_boucher

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So hello everyone my first post and I had a quick question on how the surge brakes work specifically for the link #3 and shaft #5 on the Lunette ring, do the 4 shafts rotate within the housing when brakes are applied or do the links move on the shaft 2nd picture circled in red for the horizontal movement when brakes are applied


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Just trying to see if I have corrosion and system is locked up at the shafts

Thanks
 

CallMeColt

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Spend a little time with the trailer since I needed to work on the generator a bit.

Had one of the breaking caps that would leak grease bad. Replaced it and painted both the hubs.


Painted some spots where the paint came off and put the updated tire pressure where it used to be on the fenders.

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One of my light cans had a huge crack in it. A friend gave me some military LED ones that had issues on his truck. Installed them and they gave me the same issues on the trailer... was hoping it wouldn't! So, for the time being, I put a cheap set of civilian trailer lights on but will swap to a set of the military ones when I get a good matching pair again that are not broken.

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This has been such a good trailer to me. I really beat on it taking it out to my off grid place.

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CallMeColt

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Was using the trailer to move fuel to my new storage tank at the house, and since it's cooled off a bit here finally, when stopping, I noticed a nasty grinding noise since my windows were down. I knew exactly what it was.

Pulled the hub off and found my brake shoes completely fallen apart, like the other side did a while back. Luckily, I got two sets of shoes because I knew this was going to happen.

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Brake show kit - https://amzn.to/3FgNRB2

Took me a bit to remember where everything went, since some of it was all fallen apart, but got it all back together under flashlights. Adjusted it all well. Just need to road test it. Didn't think to snap a picture of it assembled, but I do have an old video I made that I will share again that I referenced myself showing the inside in case someone else needs to see a properly assembled one. Just reverse things a bit for the other side.

 
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Tinstar

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Nicely done!
Thanks for posting the part number.

Are you going to replace the missing shackles on the rear?
They come in handy.
 

CallMeColt

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Nicely done!
Thanks for posting the part number.

Are you going to replace the missing shackles on the rear?
They come in handy.
No problem on the part number. I think somewhere back in this thread, I shared it as well.

I took them off and sold them. They made to much rattle when running the generator. I can put one on there if need be but in the time I have been using this trailer and almost 10,000 miles on it, I haven't had a need for them. I left them on my other trailers though.
 

juanprado

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Make sure the hydraulics are working properly. Very unusual that happened to both sides. I would look at the master cyl and shock to make sure the brakes are not staying engaged / slightly dragging.
 

CallMeColt

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Make sure the hydraulics are working properly. Very unusual that happened to both sides. I would look at the master cyl and shock to make sure the brakes are not staying engaged / slightly dragging.
They're not. I went through everything a while back. 100% functional. You can go back and see what I did on here.

These were probably original shoes from the manufacture date, as were the others that failed. With 10,000+ hard miles, it's no big surprise they failed. Especially not knowing how it was treated before me.

This trailer has been on my truck with a lot of butt puckering stops on the highway. So hard that I heard the tires chirp. Off road as well where the brake drags a bit.

The other side I replaced everything on is as smooth as butter still as I checked it for adjustment while I had the tools out.
 

CallMeColt

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I will be doing another M116A3 thread soon, documenting my converting it so a S-788 shelter can be mounted to it. I have everything already, just trying to wrap up other projects first. I also want to gut out the S-788 first.
 
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CallMeColt

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I have not started my new thread on the second M116A3 build out, and this would be for it, but it's relevant here as well.

It's missing one wheel stud. Search quick thinking it would be a simple find. Guess it isn't.

Technical Manual has part number 12354223 as the stud. I'd guess that is a Dexter axle part number. It comes up one place as $20 each plus shipping. Would rather not pay that.

After an hour of looking, I came up with Dexter axle part 007-257-00 or 7-257. Basically the same, but 1/4in shorter. Should work. But can't 100% confirm. Anyone replace one with these? I don't want to waste money if someone has already tried and they're to short.

If not, maybe I will be the guy. But figured I would ask.
 

juanprado

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beat the stud out and bring to an old school parts store like NAPA. With the head code marking and a couple of measurements, an experienced counterman using a buyers guide can come up with the stud not a young guy on a computer.. ;-)

These are common and not military specific. Probably dexter or another civy manufacture.

1/4 will not make a difference as more than that pokes through the lug nut.
 

Guyfang

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THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH1 29/50 INCHES NOMINAL
FASTENER LENGTH2 9/20 INCHES NOMINAL
HEAD STYLEFLAT CHAMFER
HEAD DIAMETER0 21/25 INCHES NOMINAL
HEAD HEIGHT0 7/25 INCHES NOMINAL
SHOULDER DIAMETER0 291/500 INCHES MINIMUM FIRST SHOULDER AND 74/125 INCHES MAXIMUM FIRST SHOULDER
SHOULDER LENGTH0 18/25 INCHES NOMINAL FIRST SHOULDER
NOMINAL THREAD DIAMETER0 281/500 INCHES
THREAD QUANTITY PER INCH18
SHOULDER SHAPERIBBED FIRST SHOULDER
MATERIALSTEEL COMP 1541 OVERALL
SURFACE TREATMENTZINC OVERALL AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633 TY II, CLASS FE/ZN8 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES DESIGNATORUNF
 
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