Flatbed to truck frame bolts: Check them.

   / Flatbed to truck frame bolts: Check them. #1  

nikerret

Platinum Member
Joined
Jan 2, 2015
Messages
725
Location
Kansas
Tractor
Kubota BX25D-1
Recently, I installed 27 feet of 2AWG cables from the battery to a quick connect, at the rear of the truck. While I was routing it, along the frame, I found one of the bolts that holds my Gooseneck brand flatbed on the frame of my chassis cab was loose. It could move about a half inch and was rusted. It used a 23 mm bolt head and nut, which I could not get off with my air impact (running an 11 CFM 60 gallon air compressor). I had to use a reciprocating saw to cut it.

This bed uses ten bolts, total, holding the tabs welded to the flatbed onto the frame. I was able to replace the front two (nearest the cab) with 5/8 Grade 8 bolts and washers with a lock washer and matching nut. There are two bolts by each rear tire and two bolts at the rear, lower in the frame, by the hitch receiver tube. I bought four bolts, but due to the fuel and brake lines run through the frame, I didn稚 get to more than the easy two. I will buy six more bolt sets and replace the rest, when it gets nicer outside and I have more time.

Friendly reminder, to check the bolts holding your flatbed on. Those bolts are the only thing keeping my flatbed (and any trailer attached) to the truck. Yes, I know only one pin holds all the weight of the trailer, but better to be safe.I did not get a good before picture, but here is the rusted bolt and the new bolt installed. The way the rust is moving in, I知 guessing I値l only get a few more years out of this flatbed. Sanding and repairing the tabs is also on this summer痴 project list.





If anyone is interested in the 2 AWG setup, I can start a thread on it.
 
   / Flatbed to truck frame bolts: Check them. #2  
The proper way to mount a body to a truck frame is with U bolts or all thread and top and bottom plates with at least a 1" hard wood slat in between.
There is a lot of flex and this will let the body and frame adjust.
 
   / Flatbed to truck frame bolts: Check them. #3  
Those bolts are the only thing keeping my flatbed (and any trailer attached) to the truck. Yes, I know only one pin holds all the weight of the trailer, but better to be safe.I did not get a good before picture, but here is the rusted bolt and the new bolt installed.

If anyone is interested in the 2 AWG setup, I can start a thread on it.

The gooseneck plate (ball) isnt bolted directly to the frame?

If you used this type quick connect, the pins will corrode even with regular cleaning. Might want to keep a spare around.
SUPERIOR SIGNAL Quick Connect Battery Connector
 
   / Flatbed to truck frame bolts: Check them.
  • Thread Starter
#6  
The gooseneck and rear receiver mount are both integrated into the flatbed. The flatbed is then bolted to the frame.

This is the gooseneck ball mount. It's welded to the frame of the flatbed, just forward the rear axle. It is heavy channel with reinforcements.


The rear ball mount is through a steel tube mounted to channel and reinforcements. The two bolts you can see are two I intend on replacing and they are four (two per side) of the ten that hold the flatbed to the frame.



 
   / Flatbed to truck frame bolts: Check them. #7  
The gooseneck and rear receiver mount are both integrated into the flatbed. The flatbed is then bolted to the frame.

This is the gooseneck ball mount. It's welded to the frame of the flatbed, just forward the rear axle. It is heavy channel with reinforcements.


The rear ball mount is through a steel tube mounted to channel and reinforcements. The two bolts you can see are two I intend on replacing and they are four (two per side) of the ten that hold the flatbed to the frame.[\QUOTE]
Oh, wow. On mine the fifth wheel plate and rear receiver are not part of the bed, guess I assumed that was normal.
 
   / Flatbed to truck frame bolts: Check them.
  • Thread Starter
#8  
Both ways are common. I’m not sure one is better or worse than the other, as long as they are well thought out.
 

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