Equipment Overview

Our 6600 Wood Hog horizontal grinder is an aggressive, productive grinder ideal for processing wood waste, land clearing and storm debris into saleable products. The 6600 Wood Hog’s 66" x 50" (167.64 cm x 127 cm) infeed opening processes large material with ease, and engine options up to 1200 HP (894 kW) gives you plenty of power.

The Morbark Integrated Control Systems (MICS) automatically adjusts feed rates and monitors pressures and feed wheel position to maximize production and engine efficiency. The hydraulic hinged door allows quick and easy access for changing grates. A proven drive line protection system protects against catastrophic damage from contaminants. Electric power is available as an option for a cleaner and often more cost‑effective way to process organic waste.

What materials can the Morbark 6600 Wood Hog process?

The Morbark 6600 Wood Hog is designed to grind a wide range of organic and wood waste materials, including land-clearing debris, whole trees, pallets, construction and demolition wood, railroad ties (where permitted), storm debris, and yard waste.

What industries commonly use the 6600 Wood Hog?

This horizontal grinder is widely used by recycling operations, land-clearing contractors, mulch producers, biomass facilities, municipalities, and wood waste processors that require high production rates and consistent end-product sizing.

What engine options are available on the Morbark 6600?

The Morbark 6600 is available with multiple high-horsepower diesel engine options, allowing operators to select the configuration that best matches their production goals, fuel preferences, and emissions requirements.

How does the Morbark 6600 control material flow and prevent overload?

The machine features Morbark’s advanced feed system with load-sensing technology, which automatically adjusts infeed speed to maintain optimal engine load, reduce stall conditions, and maximize throughput.

What grinding system does the Morbark 6600 use?

The 6600 utilizes a horizontal rotor design engineered for aggressive reduction and consistent particle size. Multiple rotor and tooling configurations are available to tailor performance for mulch, biomass, or fuel production.

Can the Morbark 6600 be customized for different applications?

Yes. The Morbark 6600 offers a wide range of configuration options, including different screens, hammers, tips, infeed styles, discharge conveyor lengths, and mobility packages to match specific material types and jobsite requirements.

Is the Morbark 6600 available in trailer-mounted or track-mounted versions?

The Morbark 6600 is available in several mobility configurations, including track-mounted models for off-road and land-clearing applications, as well as trailer-mounted options for operations requiring frequent transport.

How does the Morbark 6600 improve maintenance efficiency?

The grinder is engineered with service access in mind, featuring large access doors, centralized grease points, and simplified component layouts to reduce downtime and facilitate faster and safer routine maintenance.

What safety features are included on the Morbark 6600?

Standard and optional safety features include emergency stop systems, guarding around moving components, operator-friendly control stations, and available fire suppression systems designed to meet demanding jobsite safety expectations.

What size end product can the Morbark 6600 produce?

End-product size is controlled through interchangeable screens and tooling configurations, allowing operators to produce everything from coarse grind material to uniform mulch or biomass fuel, depending on application needs.

How does the Morbark 6600 compare to other horizontal grinders in its class?

The Morbark 6600 is known for its durable construction, high production capacity, operator-friendly controls, and long-term reliability, making it a preferred choice for high-volume wood waste processing operations.

Where can I buy or service a Morbark 6600 Wood Hog?

The Morbark 6600 is sold and supported through Morbark’s authorized dealer network, which provides access to factory-trained technicians, genuine Morbark parts, and ongoing service support.

Keep your equipment running in top condition with genuine OEM Morbark parts! We offer the highest-quality wear parts, genuine Morbark replacement parts, wear parts for competitive equipment, remanufactured parts with a full warranty, used parts, full-service hydraulics, and much more!

With regular factory trainings for our dealers’ service professionals, you can also be sure that our global network of dealers will give you first-class support wherever you are.

Please click the Find a Dealer button below to locate your nearest Morbark dealer, or call our Parts/Service Customer Support Call Center at 800.255.8839.

6600 Wheeled Wood Hog Horizontal Grinder
General US Metric
Length (Transport) 44'1" 13.69 m
Length (Operating) 68'10" 20.98 m
Height (Transport) 13'6" 4.11 m 
Height (Operating) 19'3" 5.87 m
Width 11'10" 3.61 m
Gross Weight (approx) 91,440 lb 41,460 kg
Axle Weight (approx) 59,440 lb 26,945 kg
Tonque Weight (approx) 32,000 lb 14,515 kg
Engine CAT
Horsepower 1,125 to 1,200 HP 88 to 894 kW
Fuel Capacity 430 gallons 1,628 L
Hydraulic Oil 238 gallons 901 L
Infeed Opening 66" x 50" 167 cm x 127 cm
Screen Area 5,661 sq in 36,522 sq cm
Brakes Air
Towing Arrangement Fifth Wheel
6600 Track Wood Hog Horizontal Grinder
General US Metric
Length (Transport) 44'9" 13.63 m
Length (Operating) 67'1" 20.44 m
Height (Transport) 11'11" 3.63 m
Height (Operating) 18'6" 5.6 m 
Width 11'11" 3.63 m
Gross Weight (approx) 109,120 lb 41,460 kg
Axle Weight (approx) 59,440 lb 26,945 kg
Tongue Weight (approx) 32,000 lb 14,515 kg
Engine CAT
Horsepower 1,125 - 1,200 HP 838 to 894 kW
Fuel Capacity  430 gallons 1,628 L
Hydraulic Oil 238 gallons 901 L
Infeed Opening 66" x 50" 167 cm x 127 cm
Screen Area 5,661 sq in 36,522 sq cm
Track SS40 Strickland Undercarriage
6600 Wheels
Wheeled units are designed for easy transport between different job sites, which is critical for contractors moving frequently between land-clearing, construction, or disaster cleanup projects.
6600 Wheels
Wheeled units are designed for easy transport between different job sites, which is critical for contractors moving frequently between land-clearing, construction, or disaster cleanup projects.
6600 Infeed Opening
Variable speed infeed system consists of one 36" (91.44 cm) diameter top compression feed roll with internal drive and a 17'6" long x 64" (5.3 m x 162 cm) wide live floor equipped with five strands of WDH-120 chain in a staggered configuration
MICS Control
The Morbark Integrated Control Systems (MICS) automatically adjusts feed rates and monitors pressures and feed wheel position to maximize production and engine efficiency.
6600 Wood Hog Hammermill
42" x 66.625" (106.68 cm x 169.2 cm) hammermill system constructed of heavy‑duty 28" (71 cm) diameter rotor, (18) 1.375" (3.5 cm) thick machined rotor plates to ensure precision and enforce steel strength. The plates are keyed on a 9" (22.9 cm) diameter shaft with 5.19" (13.18 cm) bearings and eight 2.5" (6.35 cm) hammer retaining rods. Hammermill pattern has (18) 2.25" (5.7 cm) balanced forged steel hammers, (18) 3.625" (47.3 cm) wide double-edged replaceable inserts and 18 forged rakers