JD 790 Engine Specifications
Engine Model – Yanmar 3TNV82A
Engine Type – Diesel
Gross Horsepower – 27 (20.1 kW)
PTO Horsepower (Net) – 24 (17.6 kW)
Rated Speed – 2,700 rpm
Operating Range – 1,000–2,810 rpm
No. of Cylinders – 3
Displacement – 81.2 (1.33)
Bore and Stroke – 3.23 x 3.31 in. (82 x 84 mm)
Compression Ratio – 18.1:1
Lubrication – Pressurized
Cooling System – Water pump
Air Cleaner – Dry w/safety element
Engine Shutoff – Key switch
Injection Type – Direct
Pump Type – In-line w/electric shutoff
75% Load (Mowing) – 1.3 gal/hr (4.9 L/hr)
Fuel – No. 1 Diesel, No. 2 Diesel, B5 Biodiesel
Fuel Tank Capacity – 6.3 gal. (23.85 L)
Cooling System Capacity – 4.73 qt. (5.00 L)
Crankcase (w/Filter) Capacity – 4.16 qt. (4.40 L)
Electrical System Type – 12-volt
Battery Size (at -18C) – 500 cca
Alternator – 20-amp
John Deere 790 PTO
PTO Type (2WD) – Transmission-driven w/ overrunning clutch
PTO Type (MFWD) – Continuous live
Mid PTO Speed (Rated Engine rpm) – 2,100 rpm
Rear PTO Speed (Rated Engine rpm) – 540 rpm
PTO Brake – On mid-PTO only
John Deere 790 Transmission
Transmission Type (2WD) – Sliding gear
Transmission Type (MFWD) – Sliding gear
Clutch (2WD) – Single-stage, dry
Clutch (4WD) – Two-stage, dry
Transmission Capacity – 4.00 gal. (15.14 L)
Number of Speeds – 8 forward and 2 reverse
Final Drive – Spur gear
Steering and Brakes
Steering (2WD) – Manual or hydrostatic
Steering (4WD) – Hydrostatic
Brakes Type – Dry shoe
JD 790 Hydraulics and Hitch
Type of Hydraulic System – Open center
Working Pressure – 2,050 psi
Pump (Type) – Dual hydraulic pumps (4WD only)
Implement Pump Capacity – 5.4 gpm (20.5 L/min)
Steering Pump Capacity – 4.2 gpm (15.9 L/min)
Maximum Total Flow – 9.6 gpm (36.4 L/min)
Hydraulic System Capacity – 4.00 gal. (15.14 L)
3-Point Hitch – Category 1, Standard
Hitch Lift Capacity @ 24 in. Behind Link Ends – 815 lb. (370 kg)
Lift-Control Type – Position
Tire Sizes
Front Tires (2WD) – 5.00-15
Front Tires (4WD) – 7.00-14
Front Tires (Turf) – 25×8.50-14
Front Tires (Industrial) – 25×8.50-14
Rear Tires – 11.2-24
Rear Tires (Turf) – 13.6-16
Rear Tires (Industrial) – 15.0-19.6
JD 790 Dimensions
Wheelbase – 60.4 in. (153 cm)
Length – 87.8 in. (223 cm) / 111 in. (281 cm)
Height (hood) – 51.2 in. (130 cm)
Height (ROPS) – 82 in. (208 cm)
Weight 2WD (Field Ready w/R1 Tires) – 1930 lb. (875 kg)
Weight MFWD (Field Ready w/R1 Tires) – 2105 lb. (955 kg)
John Deere 790 Attachments
Backhoe – 7 Backhoe
Loader – 300 Loader
Front Blade – 380A (54-in., 60-in., 66-in.)
Mid-Mount Mower – 60-in.
Side Discharge Grooming Mower – 261 and 272
Rotary Cutters – 4, 5-ft.
Snow Blower – 59-in.
Tillers – 655 and 665