Jo Dog / Single Axle Jeep

Here this a better look

 

Here is a better weight split moving the kingpin back 3" and the 5th wheel back 1" from previous post

 

Thanks; I’ll study on all of this and try to figure out what I’m going to do. I’m pretty sure that having a Jeep built is the way to go.

Now, I was up at the John Deere dealer today and they had a brand new 470G sitting on the yard. My mind was thinking “reckon how much faster I could load trucks with this baby?”. I can’t even imagine how much trouble and expense it is to move it.

 

Nothing to it.

 

Does it matter what size tires to run on the single axle Jeep? In the photos on this thread, it appears that you guys are running the same as on the RGN, either a 255 or 275-22.5. But why not a full size tire?

Also, I have air lines and a light socket plumbed to the rear crossmember of my truck. (In addition to behind the cab). Wouldn’t it be a neater setup to build the Jeep to utilize these connections, and then hook up the regular behind-the-cab lines to the RGN trailer? I’m pretty sure they are long enough already, because according to Shotcaller’s drawing the RGN is only moved back about 41 to 43 inches when hooked to the Jeep.

Will it take longer hoses and cord when turning? I’m having trouble visualizing the geometry of the turn.

 

You need the smaller tires for additional ground clearance when you jump the jeep up on your frame ramps, flat-spotting tires is costly. Additionally, bigger tires would raise the jeep 5th wheel higher, ie trailer deck higher , load higher! Not a good thing on oversize loads for regular travel. Also, there is no advantage to larger tires, either of the above tires you mentioned are rated for the 20,000 lbs in a 4 tire configuration you can permit on a single jeep anyway.
You need to have the tractor behind- cab air-lines and electrical hooked to the jeep at the top front of the jeep frame, and then you will have coiled air and electrical lines mounted there that will connect to the RGN trailer glad hands. Any connections at the bottom rear of your tractor would work only for a convertor dolly, the type that uses a pintle hitch, like the US wiggle wagons use. That is how the jeep set-ups work, whether single, tandem, or tri-axle jeeps. Hope this helps...

 

while using the rear frame mount hook-up sounds ok at first you will not have the clearance to use curly hoses due to the close coupling/swing radius.it has been tried and failed. this is why all jump jeep/standard jeep builders plumb top mount in and out air and electrical lines, it gives you the best swing radius without line strain because the front of both trailers are close to the pins but combined they will let the hoses drop over the side in a turn and may snag.

 

Many thanks to both of you for the explanations. Now I understand.

Since my trailer is hydraulic, I don’t have ramps on the truck. But it seems like I read on here that a person could just chain the Jeep to the RGN neck and raise the neck to the highest locked position, thus lifting the Jeep tires off the ground. If so, smaller tires equals more ground clearance.

Or as mentioned previously, just set the Jeep on the empty trailer with a trackhoe or whatever equipment is handy, and head back to the yard or next job.