Repairing New Holland baler snapped crankshafts. Part 1

In this video I start the job of repairing 2 baler crankshafts that have snapped.

Firstly I start by cutting 2 lengths of 75mm bright round bar to use to make new journals. These are then turned down to size in the lathe with a bigger radius to hopefully improve on the original weak point. The shafts are then parceled up and sent off to be hardened and tempered to match the manufactures specifications.
Next up was to start making the Jig that will be used to hold the 2 halves of the crankshaft inline while the new journal is welded in. I cut some 80x80x6 box section to use as the main frame then flame cut some rectangles from 40mm plate to use as the clamps.
The 3 top halves are drilled with 4x 12mm bolt holes and the bottoms are drilled and tapped to M12 to match the top. They’re then bolted together and a 40mm hole is drilled and reamed in the side which will be the starting hole for aligning to weld onto the frame and also to line bore.
The frame is then welded together and the crank is temporarily placed in and clamped down to see where the middle clamp will need to go.
After some over thinking its decided the third clamp can be on the same centre height as the 2 ends. Some more box section is cut and tacked on then then fully welded around.
That’s all for part 1.
Hope you enjoyed the video. Thanks for watching.
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