4x4 PTO Driven Timber Trailer BUILD Ep.8 - Differential To Beam Axle

PTO driven 4x4 timber trailer build - cleaning BMW E39 independent rear suspension differential half axles in the sandblasting cabinet. Turning in the lathe to size and welding on additional CNC laser cut flanges to accommodate the CNC-machined adapters for the 60 mm axles for the tandem axle chain housings. Fabricating a tool for turning down the modified BMW half axle to size. Checking the run-out of the shafts with a dial gauge. Turning the BMW half axle new flanges down to size and giving a centering edge so they fit together with the CNC machined adapters. Threading the flanges. Cutting off the old mounting ears of the BMW differential since they now interfere with the larger diameter flanges. Pressing back in the BMW half shafts and mounting the CNC machined adapters and shaft extenders. Sandblasting and painting the modified BMW differential. Jacking up and mocking up the now completed differential unit under the frame of the 4x4 PTO driven timber trailer with hydraulic crane. Starting to build the sliding movable axle frame that allows for load balance point adjustment on-the-fly but running into a fitment problem. The weld inside the 90x90x4mm rectangular tube prevents it from sliding on the 80x80x4mm frame tube. So I have to figure out a way of removing it. And a crude temporary fly-cutter is born out of an old rusty horse carriage axle and a cutting edge made from tool steel. Check it all out in the video! Stay tuned for the next episode & thanks for watching!

Trailer specs:
* 28x11-14" tires & 14" rims
* 1450mm/57" wide; length and height - unknown
* tandem axles with homemade chain housings
* BMW E39 530D differential with 2.81 gearing (identical to the UTV diffs)
* hydraulic crane with a boom & grapple for easier log loading & handling
* independent hydraulic power pack
* radio controlled hydraulic winch on the boom
* load capacity - 1-1,5 metric tonne

My other videos: https://www.youtube.com/DonnDIY/videos
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4x4 PTO Driven Timber Trailer BUILD series: https://youtube.com/playlist?list=PLkmF7FAZBzkXTeVlXqnK4C1_vWCCHie68

Homemade 4x4 UTV build: https://youtube.com/playlist?list=PLkmF7FAZBzkUZ3GjEo97GkWajmj9bCxzE

#donndiy #homemade #timbertrailer

Welding equipment borrowed from Spetselektroodi AS, Estonia:
Fronius TransSteel 2700 welder
Optrel Crystal 2.0 Welding Helmet
Hypertherm Powermax 45 XP plasma cutter