Ditch witch model 1230 self-propelled walk-behind, ditch witch model 1030 self-propelled walk-behind, manually steered, two-wheel drive, rigid-frame, manually steered, two-wheel drive, rigid-frame, chain-type trencher chain-type trencher dimensions. u.s. Metric a trench depth, maximum. 36 in 910 mm 30 in 760 mm. Ditch Witch Parts Manual Format: Enhanced Reproduction (Written by Manufacturer) - Printed Copy. $30.99 Add to Cart. Ditch Witch A400 Digging Attachment Operators Manual. Ditch Witch A400 Operators ManualWhen this Ditch Witch Equipment was new, the dealer would have give.