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Overview
This is a hands-on rebuild video, not a buying guide: it shows step-by-step reassembly of a John Deere 1640 PTO clutch pack, including seating the piston seal, ring, and return spring, stacking friction plates (noting the 1640 uses seven, not eight), installing the snap ring, oiling the pack, and finally air-testing that the clutch engages and locks up. Best suited to owners already doing their own PTO clutch repair on this model.
Appears to be an independent owner or tinkerer working through the repair themselves on camera, not a dealer or professional shop presentation.