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John Deere 859MH Combine Harvester Specs

Boom Performance - Configuration 1

John Deere 859MH Combine Harvester Boom Performance - Configuration 1 specifications
Boom Length 32.50 ft (9.91 m) — Starting 2026 Model Year
Lift Capacity, Bare Pin at 20 ft 17,927.00 lbs (8,131.56 kg) — Starting 2026 Model Year
Lift Capacity, Bare Pin at Full Reach 7,718.00 lbs (3,500.83 kg) — Starting 2026 Model Year

Boom Performance - Configuration 2

John Deere 859MH Combine Harvester Boom Performance - Configuration 2 specifications
Boom Length 29.00 ft (8.84 m) — Starting 2026 Model Year
Lift Capacity, Bare Pin at 20 ft 16,980.00 lbs (7,702.01 kg) — Starting 2026 Model Year
Lift Capacity, Bare Pin at 25 ft 12,900.00 lbs (5,851.35 kg) — Starting 2026 Model Year
Lift Capacity, Bare Pin at Full Reach 9,240.00 lbs (4,191.20 kg) — Starting 2026 Model Year

Boom Performance - Configuration 3

John Deere 859MH Combine Harvester Boom Performance - Configuration 3 specifications
Boom Length 25.33 ft (7.72 m) — Starting 2026 Model Year
Lift Capacity, Bare Pin at 20 ft 18,410.00 lbs (8,350.65 kg) — Starting 2026 Model Year
Lift Capacity, Bare Pin at Full Reach 12,170.00 lbs (5,520.23 kg) — Starting 2026 Model Year

Cooling

John Deere 859MH Combine Harvester Cooling specifications
Fan Type Suction type, hydraulically driven, variable speed, reversing — Starting 2026 Model Year

Final Tier 4/EU Stage V Electrical

John Deere 859MH Combine Harvester Final Tier 4/EU Stage V Electrical specifications
Alternator Rating 200-amp standard — Starting 2026 Model Year
Number of Batteries 2 — Starting 2026 Model Year
Service Lights LED (2) — Starting 2026 Model Year
Voltage 24.0 v — Starting 2026 Model Year
Voltage Per Battery 12.0 v — Starting 2026 Model Year
Work Lights LED (13) — Starting 2026 Model Year

Final Tier 4/EU Stage V Engine

John Deere 859MH Combine Harvester Final Tier 4/EU Stage V Engine specifications
Cylinders 6 — Starting 2026 Model Year
Displacement 549.00 cu in (8,996.52 cu cm) — Starting 2026 Model Year
Manufacturer John Deere — Starting 2026 Model Year
Net Peak Torque, Dedicated Travel 1,027.00 lbs ft (1,392.41 nm) — Starting 2026 Model Year
Net Peak Torque, Standard Travel 937.00 lbs ft (1,270.38 nm) — Starting 2026 Model Year
Non-Road Emission Standards EPA Final Tier 4/EU Stage V — Starting 2026 Model Year
Peak Power, Dedicated Travel 330.00 hp (246.09 kw) — Starting 2026 Model Year
Peak Power, Standard Travel 300.00 hp (223.71 kw) — Starting 2026 Model Year
Speed Net Peak Torque 1500.0 rpm — Starting 2026 Model Year
Speed Peak Power 1900.0 rpm — Starting 2026 Model Year

Final Tier 4/EU Stage V Ground Pressure

John Deere 859MH Combine Harvester Final Tier 4/EU Stage V Ground Pressure specifications
Conditions for Measuring Ground Pressure Includes standard equipment, 7.75-m (25 ft 5 in.) boom, medium extended counterweight, half-full fuel tank, and all fluids, less attachment — Starting 2026 Model Year
Counterweight Size Medium extended counterweight — Starting 2026 Model Year
Double Grouser Ground Pressure With 24-in. Track 10.2 psi — Starting 2026 Model Year
Single Grouser Ground Pressure With 24-in. Track 10.1 psi — Starting 2026 Model Year
Single Grouser Ground Pressure With 28-in. Track 8.8 psi — Starting 2026 Model Year
Undercarriage Size U7L EXD — Starting 2026 Model Year

Final Tier 4/EU Stage V Operating Weight

John Deere 859MH Combine Harvester Final Tier 4/EU Stage V Operating Weight specifications
Approximate Weight of Base Machine 79,870.00 lbs (36,228.47 kg) — Starting 2026 Model Year
Conditions for Measuring Operating Weight Includes 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 — Starting 2026 Model Year
Counterweight Size Medium extended counterweight — Starting 2026 Model Year
Undercarriage Size U7L EXD — Starting 2026 Model Year

Final Tier 4/EU Stage V Serviceability

John Deere 859MH Combine Harvester Final Tier 4/EU Stage V Serviceability specifications
Diesel-Exhaust Fluid (DEF) Tank 8.90 gal (33.69 l) — Starting 2026 Model Year
Fuel Tank 228.90 gal (866.39 l) — Starting 2026 Model Year

Hydraulics

John Deere 859MH Combine Harvester Hydraulics specifications
Hydraulics Type Closed center, load sense, pressure compensated — Starting 2026 Model Year
Oil Filtration 2 main return filters, 10-micron return with bypass, 1 case-drain strainer, 25 micron — Starting 2026 Model Year

Hydraulics Pump - Dedicated Travel System

John Deere 859MH Combine Harvester Hydraulics Pump - Dedicated Travel System specifications
Attachment Pump Maximum Rated Flow 48.00 gpm (181.68 lpm) — Starting 2026 Model Year
Attachment Pump Type Dedicated variable-displacement axial piston — Starting 2026 Model Year
Main Pump Maximum Rated Flow 131.00 gpm (495.84 lpm) — Starting 2026 Model Year
Main Pump Type Variable-displacement axial piston — Starting 2026 Model Year
Travel Pump Maximum Rated Flow 50.00 gpm (189.25 lpm) — Starting 2026 Model Year
Travel Pump Type Dedicated variable-displacement axial piston — Starting 2026 Model Year

Hydraulics Pump - Standard Travel System

John Deere 859MH Combine Harvester Hydraulics Pump - Standard Travel System specifications
Attachment Pump Maximum Rated Flow 55.00 gpm (208.18 lpm) — Starting 2026 Model Year
Attachment Pump Type Dedicated variable-displacement axial piston — Starting 2026 Model Year
Main Pump Maximum Rated Flow 141.00 gpm (533.69 lpm) — Starting 2026 Model Year
Main Pump Type Variable-displacement axial piston — Starting 2026 Model Year

Key Specs

John Deere 859MH Combine Harvester Key Specs specifications
Approximate Weight of Base Machine 79,070.00 lbs (35,865.59 kg) — Starting 2026 Model Year
Boom Length 25.33 ft (7.72 m) — Starting 2026 Model Year
Displacement 549.00 cu in (8,996.52 cu cm) — Starting 2026 Model Year
Hydraulics Type Closed center, load sense, pressure compensated — Starting 2026 Model Year
Lift Capacity, Bare Pin at Full Reach 12,170.00 lbs (5,520.23 kg) — Starting 2026 Model Year
Manufacturer John Deere — Starting 2026 Model Year

Machine Dimensions

John Deere 859MH Combine Harvester Machine Dimensions specifications
Cutting Swath With 25.5-ft Boom 17.83 ft (5.44 m) — Starting 2026 Model Year
Cutting Swath With 29-ft Boom 20.08 ft (6.12 m) — Starting 2026 Model Year
Cutting Swath With 32.6-ft Boom 21.17 ft (6.45 m) — Starting 2026 Model Year
Ground Clearance With Double Grouser 29.00 in (73.66 cm) — Starting 2026 Model Year
Ground Clearance With Single Grouser 29.00 in (73.66 cm) — Starting 2026 Model Year
Maximum Boom Reach to Attachment Pin With 25.5-ft Boom 25.42 ft (7.75 m) — Starting 2026 Model Year
Maximum Boom Reach to Attachment Pin With 29-ft Boom 29 ft, in. — Starting 2026 Model Year
Maximum Boom Reach to Attachment Pin With 29.9-ft Boom 32.50 ft (9.91 m) — Starting 2026 Model Year
Minimum Boom Reach to Attachment Pin With 25.5-ft Boom 7.58 ft (2.31 m) — Starting 2026 Model Year
Minimum Boom Reach to Attachment Pin With 29-ft Boom 8.92 ft (2.72 m) — Starting 2026 Model Year
Minimum Boom Reach to Attachment Pin With 29.9-ft Boom 11.33 ft (3.45 m) — Starting 2026 Model Year
Overall Height With 29-ft Boom - Top of Boom, Extended, Attachment Vertical 15.42 ft (4.70 m) — Starting 2026 Model Year
Overall Height With 29-ft Boom - Top of Cab With Flat Skylight 12.83 ft (3.91 m) — Starting 2026 Model Year
Overall Height With 29-ft Boom - Top of Cab With Peaked Skylight 13.58 ft (4.14 m) — Starting 2026 Model Year
Overall Track Length 16.08 ft (4.90 m) — Starting 2026 Model Year
Standard Undercarriage Size U7L EXD — Starting 2026 Model Year
Tail Swing, From Swing Center, Medium Extended Counterweight 7.33 ft (2.24 m) — Starting 2026 Model Year
Tail Swing, From Swing Center, Small and Medium Counterweight 6.33 ft (1.93 m) — Starting 2026 Model Year
Track Gauge 8.92 ft (2.72 m) — Starting 2026 Model Year
Track Length, Idler to Sprocket Center 12.58 ft (3.84 m) — Starting 2026 Model Year
Upperstructure Width With Optional Walkway 11 ft, in. — Starting 2026 Model Year
Upperstructure Width, Standard Walkway 10.33 ft (3.15 m) — Starting 2026 Model Year
Width Over Tracks With 24-in. Track Shoes 10.92 ft (3.33 m) — Starting 2026 Model Year
Width Over Tracks With 28-in. Track Shoes 11.25 ft (3.43 m) — Starting 2026 Model Year

Rotating Upper (Standard Swing System)

John Deere 859MH Combine Harvester Rotating Upper (Standard Swing System) specifications
Swing Brake Type Sealed wet multi-disc, manually applied/released — Starting 2026 Model Year
Swing Speed Maximum 7.0 rpm — Starting 2026 Model Year
Swing Torque 73,756.00 lbs ft (99,998.39 nm) — Starting 2026 Model Year

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

John Deere 859MH Combine Harvester Tier 3/EU Stage IIIA // Tier 2/EU Stage II Electrical specifications
Alternator Rating 100-amp standard, 130-amp optional — Starting 2026 Model Year
Number of Batteries 2 — Starting 2026 Model Year
Service Lights LED (2) — Starting 2026 Model Year
Voltage 24.0 v — Starting 2026 Model Year
Voltage Per Battery 12.0 v — Starting 2026 Model Year
Work Lights LED (13) — Starting 2026 Model Year

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

John Deere 859MH Combine Harvester Tier 3/EU Stage IIIA // Tier 2/EU Stage II Engine specifications
Cylinders 6 — Starting 2026 Model Year
Displacement 549.00 cu in (8,996.52 cu cm) — Starting 2026 Model Year
Manufacturer John Deere — Starting 2026 Model Year
Net Peak Torque, Dedicated Travel 1,027.00 lbs ft (1,392.41 nm) — Starting 2026 Model Year
Net Peak Torque, Standard Travel 937.00 lbs ft (1,270.38 nm) — Starting 2026 Model Year
Non-Road Emission Standards EPA Tier 3/EU Stage IIIA / EPA Tier 2/EU Stage II — Starting 2026 Model Year
Peak Power, Dedicated Travel 330.00 hp (246.09 kw) — Starting 2026 Model Year
Peak Power, Standard Travel 300.00 hp (223.71 kw) — Starting 2026 Model Year
Speed Net Peak Torque 1500.0 rpm — Starting 2026 Model Year
Speed Peak Power 1900.0 rpm — Starting 2026 Model Year

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

John Deere 859MH Combine Harvester Tier 3/EU Stage IIIA // Tier 2/EU Stage II Ground Pressure specifications
Conditions for Measuring Ground Pressure Includes standard equipment, 7.75-m (25 ft 5 in.) boom, medium extended counterweight, half-full fuel tank, and all fluids, less attachment — Starting 2026 Model Year
Counterweight Size Medium extended counterweight — Starting 2026 Model Year
Double Grouser Ground Pressure With 24-in. Track 10.1 psi — Starting 2026 Model Year
Single Grouser Ground Pressure With 24-in. Track 10.0 psi — Starting 2026 Model Year
Single Grouser Ground Pressure With 28-in. Track 8.7 psi — Starting 2026 Model Year
Undercarriage Size U7L EXD — Starting 2026 Model Year

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

John Deere 859MH Combine Harvester Tier 3/EU Stage IIIA // Tier 2/EU Stage II Operating Weight specifications
Approximate Weight of Base Machine 79,070.00 lbs (35,865.59 kg) — Starting 2026 Model Year
Conditions for Measuring Operating Weight Includes 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 — Starting 2026 Model Year
Counterweight Size Medium extended counterweight — Starting 2026 Model Year
Undercarriage Size U7L EXD — Starting 2026 Model Year

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

John Deere 859MH Combine Harvester Tier 3/EU Stage IIIA // Tier 2/EU Stage II Serviceability specifications
Fuel Tank 228.90 gal (866.39 l) — Starting 2026 Model Year

Undercarriage

John Deere 859MH Combine Harvester Undercarriage specifications
Carrier Slides/Rollers Per Side 2 — Starting 2026 Model Year
Lower Rollers Per Side 10 — Starting 2026 Model Year
Number of Track Links Per Side 47 — Starting 2026 Model Year
Track Chain 8.50 in (21.59 cm) — Starting 2026 Model Year
Track Size U7L Extreme Duty (EXD) — Starting 2026 Model Year
Tractive Effort - Dedicated Travel 80257.0 lbf — Starting 2026 Model Year
Tractive Effort - Standard Travel 83876.0 lbf — Starting 2026 Model Year
Travel Speed - Dedicated Travel - High, Forward and Reverse 2.50 mph (4.02 kph) — Starting 2026 Model Year
Travel Speed - Dedicated Travel - Low, Forward and Reverse 1.10 mph (1.77 kph) — Starting 2026 Model Year
Travel Speed - Standard Travel - High, Forward and Reverse 2.20 mph (3.54 kph) — Starting 2026 Model Year
Travel Speed - Standard Travel - Low, Forward and Reverse 1.00 mph (1.61 kph) — Starting 2026 Model Year
Type Integral track guides, thick high-abrasion-resistant material, ramp angles, hydraulic track adjustment — Starting 2026 Model Year
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