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Taylor & Messick, Delaware

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Harrington
(302) 398-3729
325 Walt Messick Road
Harrington, Delaware 19952
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John Deere 859MH

New Products / John Deere / John Deere Products / Forestry Equipment / Tracked Harvesters / 859MH

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Features

Operate in Comfort

Inside cab view of man in florescent vest and safety helmet operating a tracked feller buncher in a snowy forest

A large and spacious operator station features a floor-to-ceiling front window, ergonomic controls, and increased cab volume over prior models. It enhances operator comfort, which is crucial for maintaining high productivity during long operating hours.

Intelligent Boom Control

Side view of a tracked excavator equipped with articulated boom and mulching head, illustrating horizontal reach (A–B) and vertical movement range (C–D)

The Intelligent Boom Control (IBC) system enhances precision and efficiency by automating boom movements. With IBC, operators use a single lever to control the head direction, while the system manages boom and cylinder movements, making operations smoother and reducing operator fatigue.

TimberMatic™ Maps and TimberManager™

A rugged touchscreen monitor displaying a GPS field map with highlighted rows, guidance paths, and machine location

TimberMatic™ Maps offers a real-time production view, optimized routes, and shared machine connectivity, enhancing jobsite awareness. TimberManager™ allows web-based jobsite monitoring, enabling progress tracking and fleet optimization to streamline communication and boost efficiency.

Specifications

Undercarriage

TypeIntegral track guides, thick high-abrasion-resistant material, ramp angles, hydraulic track adjustment
Track SizeU7L Extreme Duty (EXD)
Track Chain8.5 in.
Track Chain215.9 mm
Number of Track Links Per Side47
Lower Rollers Per Side10
Carrier Slides/Rollers Per Side2
Travel Speed - Standard Travel - High, Forward and Reverse2.2 mph
Travel Speed - Standard Travel - High, Forward and Reverse3.54 km/h
Travel Speed - Standard Travel - Low, Forward and Reverse1 mph
Travel Speed - Standard Travel - Low, Forward and Reverse1.61 km/h
Travel Speed - Dedicated Travel - High, Forward and Reverse2.5 mph
Travel Speed - Dedicated Travel - High, Forward and Reverse4.02 km/h
Travel Speed - Dedicated Travel - Low, Forward and Reverse1.1 mph
Travel Speed - Dedicated Travel - Low, Forward and Reverse1.77 km/h
Tractive Effort - Standard Travel83876 lbf
Tractive Effort - Standard Travel373.1 kN
Tractive Effort - Dedicated Travel80257 lbf
Tractive Effort - Dedicated Travel357 kN

Tier 3/EU Stage IIIA // Tier 2/EU Stage II Electrical

Voltage24 V
Number of Batteries2
Voltage Per Battery12 V
Alternator Rating100-amp standard, 130-amp optional
Work LightsLED (13)
Service LightsLED (2)

Final Tier 4/EU Stage V Serviceability

Fuel Tank228.9 gal.
Fuel Tank866.3 L
Diesel-Exhaust Fluid (DEF) Tank8.9 gal.
Diesel-Exhaust Fluid (DEF) Tank33.68 L

Tier 3/EU Stage IIIA // Tier 2/EU Stage II Ground Pressure

Conditions for Measuring Ground PressureIncludes standard equipment, 7.75-m (25 ft 5 in.) boom, medium extended counterweight, half-full fuel tank, and all fluids, less attachment
Undercarriage SizeU7L EXD
Counterweight SizeMedium extended counterweight
Double Grouser Ground Pressure With 24-in. Track10.1 psi
Double Grouser Ground Pressure With 610-mm Track69.63 kPa
Single Grouser Ground Pressure With 24-in. Track10 psi
Single Grouser Ground Pressure With 610-mm Track68.95 kPa
Single Grouser Ground Pressure With 28-in. Track8.7 psi
Single Grouser Ground Pressure With 711-mm Track59.96 kPa

Machine Dimensions

Standard Undercarriage SizeU7L EXD
Overall Height With 29-ft Boom - Top of Cab With Flat Skylight12, 10 ft, in.
Overall Height With 8.84-m Boom - Top of Cab With Flat Skylight3.91 m
Overall Height With 29-ft Boom - Top of Cab With Peaked Skylight13, 7 ft, in.
Overall Height With 8.84-m Boom - Top of Cab With Peaked Skylight4.14 m
Overall Height With 29-ft Boom - Top of Boom, Extended, Attachment Vertical15, 5 ft, in.
Overall Height With 8.84-m Boom - Top of Boom, Extended, Attachment Vertical4.7 m
Overall Track Length16, 1 ft, in.
Overall Track Length4.9 m
Track Length, Idler to Sprocket Center12, 7 ft, in.
Track Length, Idler to Sprocket Center3.84 m
Tail Swing, From Swing Center, Small and Medium Counterweight6, 4 ft, in.
Tail Swing, From Swing Center, Small and Medium Counterweight1.93 m
Tail Swing, From Swing Center, Medium Extended Counterweight7, 4 ft, in.
Tail Swing, From Swing Center, Medium Extended Counterweight2.24 m
Maximum Boom Reach to Attachment Pin With 25.5-ft Boom25, 5 ft, in.
Maximum Boom Reach to Attachment Pin With 7.75-m Boom7.75 m
Minimum Boom Reach to Attachment Pin With 25.5-ft Boom7, 7 ft, in.
Minimum Boom Reach to Attachment Pin With 7.75-m Boom2.31 m
Cutting Swath With 25.5-ft Boom17, 10 ft, in.
Cutting Swath With 7.75-m Boom5.44 m
Maximum Boom Reach to Attachment Pin With 29-ft Boom29 ft, in.
Maximum Boom Reach to Attachment Pin With 8.84-m Boom8.84 m
Minimum Boom Reach to Attachment Pin With 29-ft Boom8, 11 ft, in.
Minimum Boom Reach to Attachment Pin With 8.84-m Boom2.72 m
Cutting Swath With 29-ft Boom20, 1 ft, in.
Cutting Swath With 8.84-m Boom6.12 m
Maximum Boom Reach to Attachment Pin With 29.9-ft Boom32, 6 ft, in.
Maximum Boom Reach to Attachment Pin With 9.12-m Boom9.91 m
Minimum Boom Reach to Attachment Pin With 29.9-ft Boom11, 4 ft, in.
Minimum Boom Reach to Attachment Pin With 9.12-m Boom3.45 m
Cutting Swath With 32.6-ft Boom21, 2 ft, in.
Cutting Swath With 9.91-m Boom6.45 m
Ground Clearance With Single Grouser29 in.
Ground Clearance With Single Grouser736.6 mm
Ground Clearance With Double Grouser29 in.
Ground Clearance With Double Grouser736.6 mm
Upperstructure Width, Standard Walkway10, 4 ft, in.
Upperstructure Width, Standard Walkway3.15 m
Upperstructure Width With Optional Walkway11 ft, in.
Upperstructure Width With Optional Walkway3.35 m
Track Gauge8, 11 ft, in.
Track Gauge2.72 m
Width Over Tracks With 24-in. Track Shoes10, 11 ft, in.
Width Over Tracks With 610-mm Track Shoes3.33 m
Width Over Tracks With 28-in. Track Shoes11, 3 ft, in.
Width Over Tracks With 711-mm Track Shoes3.43 m

Final Tier 4/EU Stage V Operating Weight

Conditions for Measuring Operating WeightIncludes standard equipment, 7.75-m (25 ft 5 in.) boom, medium extended counterweight, 610-mm (24 in.) single-grouser tracks, half-full fuel tank, and all fluids, less attachment
Undercarriage SizeU7L EXD
Counterweight SizeMedium extended counterweight
Approximate Weight of Base Machine79870 lb.
Approximate Weight of Base Machine36228.4 kg

Boom Performance - Configuration 1

Boom Length32.5 ft
Boom Length9.91 m
Lift Capacity, Bare Pin at Full Reach7718 lb.
Lift Capacity, Bare Pin at Full Reach3500.82 kg
Lift Capacity, Bare Pin at 20 ft17927 lb.
Lift Capacity, Bare Pin at 6.1 m8131.54 kg

Boom Performance - Configuration 3

Boom Length25.33 ft
Boom Length7.77 m
Lift Capacity, Bare Pin at Full Reach12170 lb.
Lift Capacity, Bare Pin at Full Reach5521.94 kg
Lift Capacity, Bare Pin at 20 ft18410 lb.
Lift Capacity, Bare Pin at 6.1 m8350.63 kg

Boom Performance - Configuration 2

Boom Length29 ft
Boom Length8.84 m
Lift Capacity, Bare Pin at Full Reach9240 lb.
Lift Capacity, Bare Pin at Full Reach4191 kg
Lift Capacity, Bare Pin at 20 ft16980 lb.
Lift Capacity, Bare Pin at 6.1 m7702 kg
Lift Capacity, Bare Pin at 25 ft12900 lb.
Lift Capacity, Bare Pin at 7.6 m5851.92 kg

Hydraulics Pump - Dedicated Travel System

Main Pump TypeVariable-displacement axial piston
Main Pump Maximum Rated Flow131 gpm
Main Pump Maximum Rated Flow495.89 L/min
Travel Pump TypeDedicated variable-displacement axial piston
Travel Pump Maximum Rated Flow50 gpm
Travel Pump Maximum Rated Flow189.27 L/min
Attachment Pump TypeDedicated variable-displacement axial piston
Attachment Pump Maximum Rated Flow48 gpm
Attachment Pump Maximum Rated Flow181.25 L/min

Final Tier 4/EU Stage V Engine

ManufacturerJohn Deere
ModelPowerTech™ PSS 9.0L
Non-Road Emission StandardsEPA Final Tier 4/EU Stage V
Cylinders6
Displacement549 cu in.
Displacement9 L
Speed Peak Power1900 rpm
Peak Power, Standard Travel300 hp
Peak Power, Standard Travel223.71 kW
Peak Power, Dedicated Travel330 hp
Peak Power, Dedicated Travel246.08 kW
Speed Net Peak Torque1500 rpm
Net Peak Torque, Standard Travel937 lb-ft
Net Peak Torque, Standard Travel1270.4 Nm
Net Peak Torque, Dedicated Travel1027 lb-ft
Net Peak Torque, Dedicated Travel1392.43 Nm

Hydraulics Pump - Standard Travel System

Main Pump TypeVariable-displacement axial piston
Main Pump Maximum Rated Flow141 gpm
Main Pump Maximum Rated Flow533.75 L/min
Attachment Pump TypeDedicated variable-displacement axial piston
Attachment Pump Maximum Rated Flow55 gpm
Attachment Pump Maximum Rated Flow208.2 L/min

Final Tier 4/EU Stage V Ground Pressure

Conditions for Measuring Ground PressureIncludes standard equipment, 7.75-m (25 ft 5 in.) boom, medium extended counterweight, half-full fuel tank, and all fluids, less attachment
Undercarriage SizeU7L EXD
Counterweight SizeMedium extended counterweight
Double Grouser Ground Pressure With 24-in. Track10.2 psi
Double Grouser Ground Pressure With 610-mm Track70.33 kPa
Single Grouser Ground Pressure With 24-in. Track10.1 psi
Single Grouser Ground Pressure With 610-mm Track69.63 kPa
Single Grouser Ground Pressure With 28-in. Track8.8 psi
Single Grouser Ground Pressure With 711-mm Track60.67 kPa

Final Tier 4/EU Stage V Electrical

Voltage24 V
Number of Batteries2
Voltage Per Battery12 V
Alternator Rating200-amp standard
Work LightsLED (13)
Service LightsLED (2)

Rotating Upper (Standard Swing System)

Swing Speed Maximum7 rpm
Swing Torque73756 lb-ft
Swing Torque99999.7 Nm
Swing Brake TypeSealed wet multi-disc, manually applied/released

Tier 3/EU Stage IIIA // Tier 2/EU Stage II Engine

ManufacturerJohn Deere
ModelPowerTech™ Plus 6090H
Non-Road Emission StandardsEPA Tier 3/EU Stage IIIA / EPA Tier 2/EU Stage II
Cylinders6
Displacement549 cu in.
Displacement9 L
Speed Peak Power1900 rpm
Peak Power, Standard Travel300 hp
Peak Power, Standard Travel223.71 kW
Peak Power, Dedicated Travel330 hp
Peak Power, Dedicated Travel246.08 kW
Speed Net Peak Torque1500 rpm
Net Peak Torque, Standard Travel937 lb-ft
Net Peak Torque, Standard Travel1270.4 Nm
Net Peak Torque, Dedicated Travel1027 lb-ft
Net Peak Torque, Dedicated Travel1392.43 Nm

Hydraulics

Hydraulics TypeClosed center, load sense, pressure compensated
Oil Filtration2 main return filters, 10-micron return with bypass, 1 case-drain strainer, 25 micron

Tier 3/EU Stage IIIA // Tier 2/EU Stage II Serviceability

Fuel Tank228.9 gal.
Fuel Tank866.3 L

Tier 3/EU Stage IIIA // Tier 2/EU Stage II Operating Weight

Conditions for Measuring Operating WeightIncludes standard equipment, 7.75-m (25 ft 5 in.) boom, medium extended counterweight, 610-mm (24 in.) single-grouser tracks, half-full fuel tank, and all fluids, less attachment
Undercarriage SizeU7L EXD
Counterweight SizeMedium extended counterweight
Approximate Weight of Base Machine79070 lb.
Approximate Weight of Base Machine35865.52 kg

Cooling

Fan TypeSuction type, hydraulically driven, variable speed, reversing