40/36 Whole Tree Drum Chipper

The Morbark 40/36 Whole Tree Drum Chipper is a compact, affordable, productive drum chipper designed with the biomass industry in mind. Equipped with the same internal drive perfected on Morbark horizontal grinders, along with an extra wide feed opening, the 40/36 aggressively feeds brushy tops and limbs, quickly and effortlessly filling a chip van to maximum legal load capacity. Morbark’s Advantage 3 Drum decreases downtime while providing higher-quality chips. The feed system is more efficient due to a staggered knife configuration and contains fewer moving parts, reducing maintenance. With low fuel consumption per ton produced, this unit is economical.  At 8’6″ (2.59 m) wide this compact unit is easily transportable and requires no permits to move.

Drum Chipper MICS

Morbark Integrated Control Systems (MICS)

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

Morbark Advantage 3 Drum


The Advantage 3™ drum creates more uniform chips, and reduces operating and maintenance costs.


Directional flow discharge chute is hydraulically adjustable by remote control for maximum chip loads.

Infeed System

Aggressive live floor and large top feedwheel ensure positive feed of brushy tops and limbs.

Operator’s Cab Option

Cab hydraulically raises into operating position and lowers for transport position. Easy access in either position.


Length NCL: 37’5″ (11.4 m)
Height NCL: 12’5″ (3.78 m)
Width NCL: 8’6″ (2.59 m)

Length NCL Track: 32’8″ (9.95 m)
Height NCL Track: 11’6″ (3.5 m)
Width NCL Track: 9’10” (2.99 m)

Length WCL Track: 32’10” (4.21 m)
Height WCL Track: 11’11” (3.63 m)
Width WCL Track: 11’6″ (3.5 m)

Gross weight NCL: 54,500 lbs. (27,720 kg)
Axle weight NCL: 31,750 lbs. (14,400 kg)
Tongue weight NCL: 22,750 lbs. (10,320 kg)

Gross weight NCL Track: 58,580 lbs. (26,571 kg)
Gross weight WCL Track: 65,860 lbs. (28,875 kg)

Engine: CAT
Horsepower: 755 HP to 875 HP (563 kW to 652 kW)

Fuel capacity (tank): 300 gallons (1,135 litres)
Hydraulic oil capacity: 187 gallons (708 litres)

Chipping capacity: 24″ (60.96 cm)

Brakes: air

Towing arrangement: fifth wheel

Dust suppression system

Hydraulically operated debris containment door

Automatic reversing fan system

Rear hydraulic stabilizers

Light package

11 HP (8.2 kW) air compressor with lockable enclosure


Infeed System

Infeed opening: 40″ x 39″ (101.6 cm x 99.06 cm)

Infeed System consists of one 30″ (76.2 cm) diameter top compression feed roll with internal drive, a 14″ (35.56 cm) diameter bottom feed wheel and a 40″ wide x 12’6″ (101.6 cm x 2.89 m) long live floor equipped with three strands of WDH-120 chain in a staggered configuration.

Chipper Assembly

Drum diameter:  36″ (91.44 cm)
Drum width: 43 ½” (110.49 cm)
Chipper knives: (8) 11″ x 7 5/16″ x ¾” thick (27.94 cm x 18.57 cm x 1.9 cm)
Counter knives: (8) 11″ x 6 3/8″ x ½” thick (27.94 cm x 16.19 cm x 1.27 cm)
Knives and Counter knives are Babbitt-style and made of A-8 modified steel
Drum speed: 968 RPM
Feed drive: Hydraulic

Discharge System

Straight discharge chute includes hydraulically operated chip deflect with vertical and horizontal adjustment, clean-out door and an additional 18″ (45.72 cm) top section.


Wireless remote control with 60′ (18.28 m) tethered remote back-up system for chipper operation. Functions include forward/reverse of feed works, up and down of top feed roll, operation of chip discharge chute and throttle.

Cab and Loader (optional)

Model 250 Hydraulic Knuckleboom Loader with 23′ (7 m) extended boom reach, turntable bearing with 280-degree swing, 2537 log grapple with 360-degree turn motor. Stationary rising operator’s cab and console, complete with joystick controls for loader, Red Dot combination air conditioner/heater, cab-mounted MICS, engine gauge panel, emergency shut-down system, six-way adjustable swivel seat, color-tinted safety glass with steel guard


  • Microchip configuration with chip accelerator and forestry grate
  • Chip accelerator
  • ESPAR heating system for cold-weather start
  • Top load discharge
  • 320L Caterpillar undercarriage
Specifications may vary with equipment options.
Morbark Knives

Morbark Knives: High Performance. Higher Value.

Morbark knives give you:

  • Morbark Durability
  • Improved Quality
  • Better Value
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