I took this information from a spec sheet I downloaded a few years ago. Please pardon the spacing, not much I can do about it.
MODEL 617
CUTTER BAR
Cutting width, ft. in. (mm) 9' 2" (2800)
Cutting height, in. (mm) 95-3.25 (24-82.5)
Cutter bar tilt angle, degrees 0 to -10
Cutter bar operating range, degrees +18 to -28
Breakaway angle, degrees 19
Type cutterbar Modular
Number of discs 7
Knives per disc 2
Disc cutting diameter, in. (mm) 19.7 (500)
Disc drive Bevel gears in sealed modules
Disc speed, RPM 3000
DRIVELINE
Minimum PTO horsepower required, hp (kW)* 60 (44.7)
Input speed, PM 540
Driveline protection Belt drive to cutter bar
Overrunning clutch On PTO shaft
Belt tension Spring-loaded tensioner with adjustment gauge
HYDRAULICS AND HITCH
Hydraulic circuits required One remote
Minimum relief pressure required, psi (bar) 1500 (104)
Hitch Category II
DIMENSIONS AND WEIGHT
Overall width, in. (mm) 181.75 (4616)
Overall length, in. (mm) 50.5 (1283)
Height - transport position, in. (mm) 141 (3581)**
Weight, lb. (kg) 1535 (698)
* Recommended for use with tractors having a fully enclosed cab.
** Transport height is based on 18-inch (457 mm) hitch-pin height above ground.