John Deere 120

John Deere 120The John Deere 120 is a lawn tractor model from the 100 Lawn series, manufactured from 1970 to 1970 by John Deere in Horicon, Wisconsin, USA. It was available in a two-wheel drive (2WD) version.

The John Deere 120 is equipped with a 476 cc (29.0 cu·in) single-cylinder gasoline engine with 86.0 mm (3.39 in) of the cylinder bore and 83.0 mm (3.27 in) of the piston stroke, and a hydrostatic transmission with infinite forward and reverse gears.

The John Deere 120 lawn tractor features:

  • The Kohler K301AS gasoline engine which produces 12.1 PS (8.9 kW; 12.0 HP) at 3,600 rpm of horsepower.
  • Manual steering
  • Disc brakes
  • Open operator station
  • Sleeve hitch (optioanl)
  • Independent front PTO with electric clutch
  • Independent middle PTO with electric clutch

General specifications

General Specifications
Model John Deere 120
Tractor type Lawn tractor
Production years 1970-1970
Factory Horicon, Wisconsin, USA
Dimensions and weight
Length 1,715 mm (67.5 in)
Width 965 mm (38 in)
Height 1,090 mm (42.9 in)
Wheel base 1,170 mm (46.1 in)
Weight 294 kg (648 lbs)
Fuel capacity
Fuel tank capacity 6.6 liters (1.7 US gal.; 1.5 Imp. gal)


Engine Specifications
Engine model Kohler K301AQS
Engine type 4-stroke, L-head (side valve), single-cylinder
Displacement 476 cm3, (29.0 cu·in)
Bore and stroke 85.7 mm X 82.6 mm (3.37 in X 3.25 in)
Compression ratio 6.0:1
Max. horsepower 12.2 PS (9.0 kW; 12.0 HP) at 3,600 rpm
Cooling system Forced air
Lubricating system Splash type
Fuel system Carburetor
Starting system Electirc starter
Compression pressure
Normal: 7.7-8.4 kg/cm2 (7.6-8.3 bar, 110-120 psi) / 1,000 rpm
Valve clearance
Intake valve clearance: 0.20-0.25 mm (0.0079-0.0098 in)
Exhaust valve clearance: 0.43-0.48 mm (0.0169-0.0189 in)
Oil system
Lubrication system: Splash type
Oil type: API SF or SG
Recommended oil: Summer: SAE 30W
Winter: SAE 5W-20, 5W-30
Oil capacity: 1.4 L (1.5 US. qt, 1.2 Imp. qt.)
Ignition system
Spark plug: Champion RH10
Spark plug gap: 0.65 mm (0.0256 in)
Spark plug torque: 27 N·m (2.8 kg·m, 19.9 ft·lb)

Transmission and chassis

Chassis, steering and brakes
Chassis 4×2 2WD
Steering type Manual
Brakes Disc
Transmission manufacturer or model Sundstrand 15
Transmission type Hydrostatic
Gears Infinite forward and reverse


Front tires Lawn/turf: 16×6.00-6
Rear tires Lawn/turf: 23×8.50-12

PTO (Power take-off shaft)

Front PTO type Independent with electric clutch
Front PTO speed
Middle PTO type Independent with electric clutch
Middle PTO speed

Electrical system

Electrical system
Ground Negative
Charging system
Charging amps
Battery 12V

Serial numbers

John Deere 120 serial numbers
1970 1001
1971 7500


John Deere 41: 38″ mid-mount mower deck with 2-blade and hydraulic lift
Cutting width 960 mm (38 in)
John Deere 48″ mid-mount mower deck with 3-blade and hydraulic lift
Cutting width 1,210 mm (48 in)
John Deere 54″ front-mount blade with hydraulic-lift
Cutting width 1,370 mm (54 in)
John Deere 54C: 54″ center-mount blade with hydraulic-lift and manual-angle (hydraulic-angle optional)
Cutting width 1,370 mm (54 in)
Lift 70 mm (3 in)
Angling 20°
Weight Manual: 47 kg (104 lbs)
Hydraulic: 50 kg (112 lbs)
John Deere 49: 46″ front-mount one-stage snow blower with hydraulic-lift
Cleaning width 1,160 mm (46 in)
Weight 89 kg (197 lb)
ATTENTION! Dear visitors, this is an informational database of technical specifications, we are not a parts supplier or a marketplace.

We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

Be the first to comment

Leave a Reply

Your email address will not be published.