The 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.
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
Transmission manufacturer or model
Sundstrand 15
Transmission type
Hydrostatic
Gears
Infinite forward and reverse
Tires
Tires
Front tires
Lawn/turf: 16×6.00-6
Rear tires
Lawn/turf: 23×8.50-12
PTO (Power take-off shaft)
PTO
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
Attachments
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)
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