The Wil-Rich 657 Disc Chisel is ideally suited for the first tillage pass in high residue conditions. Coulter discs on the 657 are offset from shanks to allow shank assemblies to properly till and bury crop residue.  The split-the-middle design offsets the coulter discs 7.5 inches (19 cm) from the shanks to dislodge root balls and more efficiently start the decomposition process. The combination of coulter discs in the front for sizing crop residue and careful shank placement around wheels minimizes plugging.
SPECIFICATIONS
MAIN FRAME
4″ x 6″ x ⅜” (10.1 x 15.2 m x 1 cm) tubular frame
STRAIGHT CUTTER GANGS (OPTIONAL)
20″ (51 cm) diameter x .197″ (.5 cm) thick on 7½” (19 cm) spacing
Arbor bolt 1½” (4 cm) diameter
Visual gauge of relative cutter depth
SPECIFICATIONS
Under frame clearance: 30″ (76 cm)
Operating speed: 5 – 7 mph (8 – 11 kph)
HP (PTO) per foot: 15 – 20 (37 – 49 kW per meter)
SAFETY EQUIPMENT
Safety chain
Transport warning lights
HITCH
Cat. III, IV, or V tongue options for 1-1/2″ (3.8 cm), 2″ (5 cm),  or2-3/4″ (7 cm) diameter pin
WHEELS
Walking tandem wheels: 11L x 15, 12-ply tires on 15 x 8 6-bolt rims
SHANKS
Heavy duty 1,400 lb. (635 kg) spring cushion shanks on 15″ (38.1 cm) spacing
DISC UNITS (OPTIONAL)
22″ (56 cm) diameter x .27″ (.7 cm) thick on 15″ (38 cm) spacing
