M939 battery relocation kit question

[EO2NMCB]

My m931a1 came from a reset with the battery relocation kit installed. My question is when you use the steps to get in the truck on said box it has a bounce to the battery box. Is this normal? I can't find and loose nuts or bolts.

Thanks
Charlie

 

[wheelspinner]

Most likely yes. It uses longer frame mounts, so longer leverage in the original bolt locations with the same size frame mount material. They are just longer. I put a side tool box from the passenger side step on a 939 on a Ford E350 and because the mounting space is shorter, the box mount now "flexes" or "bounces". I don't think anything at all about it.

 

[R Racing]

The m917 and m920 have the batteries in the step. and yes if you weigh over 100 lbs they have a bit of a bounce to them.

 

[M35A2-AZ]

Yes, I have two of the kits on trucks and they do bounce a little.

 

[EO2NMCB]

Thanks for the answers, That relieves my paranoia!

 

[gimpyrobb]

Just think about how much weight is there, I'm surprised it doesn't bounce more.

 

[Hoefler]

I installed one of these on my 5 ton. No bounce-its rigid. The kit comes with a bolt on gusset-strap (look close and you can see it on front of box). Make sure you have these installed.
Pete

 

[Fredo Corleone]

Would anybody have the paperwork / parts list for this mod. I have the box but nothing else.

 

[Hoefler]

Go here to see it
Pete
http://www.nsncenter.co.uk/Library/TM/TM-9-2320-272-24P-3?PageNumber=223

 

[jonesal]

That's the parts book. The installation instructions for the modification kit are posted here on my modification kit thread.

For your bouncy box, are the reinforcing straps missing? See the installation instructions and parts book. Also look for cracks in the main supports. With four batteries and my big butt on the steps, that's a lot of weight so I can see how years of use *might* do some damage. But for now, it's sold as a rock.

Al Jones
M923

 

[jester3798]

Hoefler, what mounting brackets did you use for this box? I have the box and when I tried to put it on I was about 2 inches to high and hitting the cab. thanks rc

 

[Scar59]

If anyone is interested, I have a set of the slide in battery boxes for the relocation kit, tan in color, all correct hardware and attach brackets (NOS)
PM me
JC

 

[Hoefler]

Hoefler, what mounting brackets did you use for this box? I have the box and when I tried to put it on I was about 2 inches to high and hitting the cab. thanks rc

My box came complete with new brackets
they where taller
pete

 

[jonesal]

See my link in post 10 - it shows pictures of the battery box mounts and tool box mounts side-by-side.

Al Jones

 

[1 Patriot-of-many]

What is the point of relocating the batteries?

 

[Hoefler]

Moving batteries to outside box makes them easier to service. Opens up storage under seat in cab, and keeps the cab safe from battery gasses.
Pete