John Deere 120
The John Deere 120 is a tractor produced by John Deere Lawn Tractors. It is equipped with a 476 cc 29.1 ci engine. The listed engine power is Gasoline (gross): 12 hp / 8.9 kW. Transmission: Sundstrand 15. Operating weight: 736 lbs 333 kg.
Engine Power
Gasoline (gross): 12 hp / 8.9 kW
Fuel & Capacities
1.75 gal
6.6 L
Transmission
Sundstrand 15
Operating Weight
736 lbs
333 kg
Overview
![]() | 1970 - 1971
100 SeriesGarden tractor
100 Series
Garden tractor |
|---|
Production | |
|---|---|
Manufacturer | John Deere |
Garden tractor | |
Built in Horicon, Wisconsin, USA | |
John Deere 120 Engine | |
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12HP Kohler 476cc 1-cyl gasoline | |
Fuel tank | 1.75 gal
6.6 L |
Engine details ... | |
John Deere 120 Transmission | |
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hydrostatic | |
Transmission details ... |
Mechanical | |
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Two-wheel drive | |
Manual steering | |
Open operator station |
Tractor hitch | |
|---|---|
Type | sleeve hitch OptOptional |
Power Take-off (PTO) | |
|---|---|
Front PTO | independent |
Clutch | electric |
Dimensions & Tires | |
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Wheelbase | 46 inches
116 cm |
Weight | 736 lbs
333 kg |
Front tire | 16x6.50-8 |
Rear tire | 23x8.50-12 |
Full dimensions and tires ... | |
Electrical | |
|---|---|
Ground | negative |
Battery volts | 12 |
Battery AH | 14 |
References | |
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![]() | |
Lawn and Garden Equipment published in 1970, by John Deere | |
Loaders for John Deere Lawn & Garden Tractors published in 1970, by Johnson | |
Loaders for John Deere Lawn & Garden Tractors published in 1971, by Johnson | |
![]() | |
Operator's Manual 120 (OM-M44400) published in 1969 | |
Operator's Manual 41 and 48 Rotary Mowers (OMM49677) | |
Operator's Manual 43C and 54C Center Blade (OMM45478) published in 1970 | |
Operator's Manual 49 Snowthrower (OMM89078) published in 1986 |
Engine
Engine Detail — 476 cc / 29.1 ci Gasoline
Manufacturer | Kohler K301AS |
Fuel Type | Gasoline |
Configuration | 1-cylinder, air-cooled horizontal-shaft |
Displacement | 476 cc
29.1 ci |
Bore/Stroke | 3.38x3.25 inches
86 x 83 mm |
Power (gross) | 12 hp
8.9 kW |
Air cleaner | dry |
Idle RPM | 1200-3800 |
Starter | electric |
Starter volts | 12 |
Sparkplug gap | 0.025 inches
0.635 mm |
Point gap | 0.020 inches
0.508 mm |
Intake valve clearance | 0.010 inches (cold)
0.254 mm |
Exhaust valve clearance | 0.020 inches (cold)
0.508 mm |
Oil capacity | 1.5 qts
1.4 L |
Oil change | 25 h |
Transmission
Transmission — Sundstrand 15
Transmission | Sundstrand 15 |
Type | shaft-driven hydrostatic |
Gears | infinite forward and reverse |
Oil capacity | 5 qts
4.7 L |
Oil type | Deere 303 |
Oil change | 500 h |
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Deere 303 |
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120 Transmission Controls | |
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![]() | |
1 | Brake |
2 | Forward/Reverse |
3 | Throttle |
4 | Parking brake |
Dimensions
John Deere 120 Tires | |
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Lawn/turf front | 16x6.50-8 |
Lawn/turf rear | 23x8.50-12 |
Lawn/turf front | 4.80/4.00-8 |
Lawn/turf rear | 23x10.50-12 |
Dimensions | |
|---|---|
Wheelbase | 46 inches
116 cm |
Length | 67.5 inches
171 cm |
Width | 38 inches
96 cm |
Height | 43 inches
109 cm |
Weight | 736 lbs
333 kg |
Front tread | 31.25 inches
79 cm |
Rear tread | 29/34.5 inches
73/87 cm |
Attachments
Attachment overview | |
|---|---|
38" mid-mount mower deck | |
46" mid-mount mower deck | |
Snowblower | |
Blade | |
Front-end loader | |
The 120 was compatible with the model 33 tiller with 26-, 34-, or 42-inch width. |
Photos
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for John Deere Lawn Tractors John Deere 120.
Estimated Continuous Field Runtime: 2.9 hrs
Approximately 2.9 hours of continuous field operation at ~75% rated power on a full tank (1.8 gal / 6.6 L).
Estimated 75% Load Fuel Burn~0.6 gal/hr (2.4 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
John Deere Lawn Tractors John Deere 120 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for John Deere Lawn Tractors John Deere 120.
Converted Equivalents:
Horsepower (HP)12 hp
Kilowatts (kW)8.9 kW
Metric Horsepower (PS / CV)12.2 PS
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