Fort Kent Parts
Change Location
Your Preferred Store


Wheeled Feller Bunchers | John Deere

Fort Kent Parts
Change Location
Your Preferred Store
Close X

Request Quote

Fill out the form to contact us about a quote. A representative from Nortrax will contact your shortly.

  • 11% more horsepower
  • Up to 12% faster cycle times
  • Upgraded hydraulic cylinders


Product Brochures


Increased horsepower and machine stability

    The 643L boasts significantly more horsepower for superb responsiveness. Unsurpassed power-to-weight ratio ensures steady multifunction performance in wet or hilly conditions.

Redesigned engine and equipment frame structures

    Optimal weight distribution and longer wheelbase improve balance, for better stability when climbing hills and controlling trees. The 643L's wheelbase is 229-mm (9 in.) longer than their previous model.

Wide-open access to cooling package

    Cooling fan and other cooling system components swing out for quick and easy cleaning. Air-intake compartment is sealed off from the engine compartment to keep things cool.

The cab is 25-percent roomier and 50-percent quieter

    In addition to the larger cab size, the controls allow operators to configure joystick buttons to their own individualized preference. The optional joystick and foot controls deliver smooth, low-effort control to help reduce operator fatigue over long shifts.

Quick Dump for the disk saw felling head

    New one-button Quick Dump opens both accumulating and grab arms, releasing trees from the pocket. Head-tilt and arm functions are combined into a single motion, minimizing fatigue.



  • Engine Manufacturer John Deere
  • Engine Model PowerTech PSS 6.8L
  • Emission Rating Tier 4
  • Displacement, ltr (Inches³) 6.8 (414)
  • Engine Output, kW (hp) 201 (270)
  • Engine Torque, Nm (lbf / ft) 1141 (841)
  • Number Of Speeds - Forward 2
  • Number Of Speeds - Reverse 2
  • Transmission Hydrostatic
  • Steering Articulated frame
  • Front Axle Oscillating
  • Planetaries Inboard
  • Std tire size front 28 L x 26
  • Service Brake Type Wet Disc - Inboard
  • Parking Brake Type Spring on / hydraulic release


  • Overall Length, mm (ft/in) 6293 (20 ft 8 in)
  • Height Over Cab, mm (ft/in) 3216 (10 ft 7 in)
  • Width, mm (ft/in) 2913 (9 ft 7 in)
  • Wheelbase, mm (ft/in) 3175 (10 ft 5 in)
  • Ground Clearance, mm (inches) 484 (19)
  • Steering Articulation Angle, ± ° 45


  • Fuel Tank, ltr (gallons (US)) 396 (104.6)
  • Hydraulic Tank, ltr (gallons (US)) 169.1 (44.7)
  • Alternator Capacity, Amp 150


  • Travel Speed, kph (mph) 17.5 (10.8)
  • Oscillation Point Front Axle
  • Oscillation Angle, ± ° 15
  • System Voltage, V 24
  • Pump Axial piston


  • Operating Weight, kg (lbs) 17000 (37480)

Close X

Contact Us

Fill out our contact form and a Nortrax representative will contact you shortly.