Rotary Weld Positoner High Torque Upgrade

Although I've had no problem with the somewhat limited amount of torque on my weld positioner, I've had a few users try welding very large pipe sections on theirs without much luck. From the pictures they've sent me, they were trying to weld four 6" (schedule 40?) Tee sections that were all facing the same way. The piece was about as big as the pallet it was laying on. I've been very clear about the lack of torque (which isn't needed when welding round or balanced parts) but I didn't want to give up on helping these guys out. So I tested a stepper motor with a gear reduction box attached to it. See the video for more information on this. Although I have not done extensive testing on this setup, I will update the plans soon to include information about this upgrade.

Disassembly Time

I paid around $700 for that mower. And it yielded a lot of good parts.

• 3 cylinder Kubota diesel engine with all of the accessories.
• Hydraulic steering valve, cylinder and wheel.
• 3 section hydraulic pump 
• Drive and control valve (that will be used for the dump bed) 
• Hydraulic drive motors 

All I should need to finish out the hydraulics is the lift cylinders and the rotary flow divider. Hoses and fittings as well. Which will probably end up costing more than the whole mower actually. 

I'll also be using different wheel motors for two reasons that will be explained later on.