Summary
The Ditch Witch J20 is a compact, ride-on trencher designed for utility installation and landscaping. It was manufactured primarily in the late 1980s through the 1990s. ditch witch j20 repair manual
Replacing the vibratory eccentric shaft bearings –
Requires removal of plow head, press extraction of shaft, and shimming for end-play (0.002–0.006 in). Review — Ditch Witch J20 Repair Manual Summary
Visit a local Ditch Witch dealership (The Toro Company). Provide your serial number. The J20 ran from 1999 to 2010, so manuals are backordered. Ask for the Service Manual (not the Parts Manual). Cost: $150 - $300. Option 1: Ditch Witch Dealers (The Best Source)
A comprehensive service manual for the J20 generally includes these vital chapters: Ditch Witch J20 Specs - sciphilconf.berkeley.edu