mounting tool box

[boostin]

Just a quick question about mounting tool box's to the frame

I saw in the body builders manual that any attatchment over I think 200 pounds should have a header plate mounted behind the frame?

You guys ever do that?

Would I need to do that with my side mount fuel tank I installed?

 

[SkiFreak]

Can you mount the toolbox onto your subframe? If so, I am sure most would agree that this would be preferable.

As for your fuel tank mounting...
My OEM fuel tank was mounted on J brackets which were bolted to some 1/4" thick, 6" square, tubular spacers. Those spacers were directly bolted to the chassis rail and they would have spread the load quite well.
Just be aware that fluids have a "dynamic weight", which gives them very different dynamics to that of a static weight.

 

[boostin]

Let's break this into two different scenarios.. First

Fuel tank..the fuel tank mounts are welded to steel plates about 9" tall x 5" wide x2 and each plate has 4 bolts holding it so the fuel tank has 8 bolts total holding it to the frame

The tool box can't be mounted to the sub frame so I basically coppied the buyers tool box brackets that are a L shape that the tool box sits on.

I think the tool box I should make plates behind it cause I have less bolts holding it on..maybe the fuel tank will be ok? The fuel tank is only temporary till I find a good deal on a bigger one

 

[SkiFreak]

Another contributing factor is where you are mounting the toolbox, as some areas of the chassis are less critical than others.
Also, the mounting system needs to cater for the weight that will carried. We are not talking rocket science here, but it's better if you get it right.

 

[yabanja]

I mounted mine to the subframe.

Allan

 

[pugslyyy]

For better or for worse, pretty much everything on my vehicle is mounted on the subframe.

The exceptions as things that position between the frame rails - and air compressor, 2 AGM batteries, a 50 gallon water tank, and a 20 gallon propane tank.

That way when you have to replace your rear frame section you just lift the subframe off of it and roll the rear frame section out on the back wheels.


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[boostin]

The problem is my subframe is made from square tubing so it is hard to fasten anything to it.. It is sealed right now I would hate to drillhole holes into it and open a spot for corrosion it is Canada after all with lots of road salt

 

[yabanja]

I welded to my boxed subframe.

Allan


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[SkiFreak]

The problem is my subframe is made from square tubing so it is hard to fasten anything to it.. It is sealed right now I would hate to drillhole holes into it and open a spot for corrosion it is Canada after all with lots of road salt

I do not see that as a real issue.
Drill the holes big enough to use large rivnuts. When mounting the bracket, use a bit of mastic to ensure that no moisture goes past the thread. Simple!

 

[boostin]

So you guys are thinking I should not proceed with the frame mounted brackets I built for the tool box?

Sorry come from class 8 oil field trucks where any thing go's

 

[SkiFreak]

So you guys are thinking I should not proceed with the frame mounted brackets I built for the tool box?

In my opinion, for what it's worth, mounting the toolbox off the subframe would be my preferred method.
But hey... it's your truck.

 

[boostin]

I want what's best for the truck ultimately so I will re do the mounts

Thanks for the advice

Mike

 

[SkiFreak]

I want what's best for the truck ultimately so I will re do the mounts

Good call.

One of the major advantages of this forum is that there are numerous Fuso owners here that "have been there and done that". As I see it, it's prudent to learn from their experiences.

 

[boostin]

I all ready drilled the frame holes so hope fully that does not effect it's life

 

[SkiFreak]

Just paint the inside of the holes to reduce the possibility of corrosion.