3800 Wood Hog Horizontal Grinder

The Morbark 3800 Wood Hog is an aggressive, productive horizontal grinder built to process clearing debris, yard, storm and other mixed woody waste into saleable products. With a 38” x 59¾” infeed opening, the 3800 provides outstanding material flow into the mill chamber. Morbark designers created plenty of space under and within the mill to allow for smooth operation on large and bulky material. Engine options include Caterpillar or Cummins diesel engines with horsepower ranges from 440 to 700.

Morbark Integrated Control Systems (MICS)

Automatically adjusts feed rates and monitors pressures and feed wheel position to maximize production and engine efficiency.


Laser-cut upturn rotor, factory-balanced with forged hammers, offers unsurpassed durability and smooth operation.

Feed System

Internal planetary drive with no chains and sprockets means lower maintenance, more torque and better durability.

Electric Power

Electric power is available as an option for a cleaner and often more cost-effective way to process organic waste.

Track Undercarriage Option

320L Caterpillar undercarriage with 600mm double grouser shoes provides ground clearance of 17″.


Length (transport) wheeled: 38’8″
Length (operating) wheeled: 58’8″

Height (transport) wheeled: 13’2″
Height (operating) wheeled: 17′

Width wheeled: 10’8″

Length (transport) tracked: 38’2″
Length (operating) tracked: 58’5″

Height (transport) tracked: 12′
Height (operating) tracked: 16’4″

Width tracked: 10’4″

Gross weight wheeled: 57,420 lbs.
Axle weight: 36,240 lbs.
Tongue weight: 21,180 lbs.

Gross weight tracked: 66,700 lbs.

Engine: CAT, Cummins or John Deere
Horsepower: 440 HP to 700 HP

Fuel capacity (tank): 280 gallons
Hydraulic oil capacity: 187 gallons

Brakes: air

Towing arrangement: fifth wheel

Dust suppression system

Hydraulically operated debris containment door

Remote control with tethered back-up system

Infeed System

Infeed opening: 59 ¾” x 38″

Variable speed infeed system consists of one 30″ diameter top compression feed roll with internal drive and a 16′ long x 59 ¾” wide live floor equipped with four strands of WDH-110 chain in a staggered configuration.

Hammermill and Grates

28″ x 60 3/8″ hammermill system constructed of heavy-duty 17 5/8″ diameter rotor; 17, 1 1/8″ thick, two-piece laser-cut rotor plates to ensure precision and enforce steel strength. The plates are keyed on a 5 7/8″ diameter shaft with 3 15/16″ bearings on both ends of the rotor and eight 2″ hammer retaining rods. Hammermill pattern has 18, 2″ balanced forged heavy-duty hammers, 18, 3 1/16″ wide, double-edged replaceable inserts and 18 rakers.

Discharge System

Discharge system consists of a hydraulically driven, horizontal 48″ x 17’9″ aggregate belt conveyor discharging onto a 36″ stacking conveyor with hydraulic fold for transport.


  • Electric power
  • Externally adjustable break-away torque limiter 30-hammer hammermill pattern
  • 12- or 16-knife chipper drum assembly
  • Variety of grates sizes available
  • Variety of conveyors available
  • Thrower with extended discharge chute
  • Magnetized end pulley with collecting slide tray for ferrous metal removal
  • Automatic reversing fan system
  • 11 HP air compressor with lockable enclosure
  • ESPAR heating system for cold-weather start
  • Hydraulic rod puller
  • Trailer to haul soft start panel
Specifications may vary with equipment options.