John Deere 312

John Deere 312The John Deere 312 is a garden tractor model from the 300 series, manufactured from 1977 to 1978 by John Deere in Horicon, Wisconsin, USA. It was available in a two-wheel drive (2WD) version.

The John Deere 312 is equipped with a 476 cc (29.0 cu·in) single-cylinder gasoline engine with 85.7 mm (3.37 in) of the cylinder bore and 82.6 mm (3.25 in) of the piston stroke, and a shaft-driven hydrostatic transmission with infinite forward and reverse gears.

The John Deere 312 garden tractor features:

  • The Kohler K301AQS gasoline engine which produces 12.1 PS (8.9 kW; 12.0 HP) at 3,500 rpm of horsepower
  • Manual steering
  • Open operator station
  • Sleeve hitch (optional)

General specifications

General Specifications
ModelJohn Deere 312
Tractor typeGarden tractor
Production years1977-1978
FactoryHoricon, Wisconsin, USA
Dimensions and weight
Wheel base
Weight344 kg (758 lbs)
Fuel capacity
Fuel tank capacity17.0 liters (4.5 US gal.; 3.7 Imp. gal)


Engine Specifications
Engine modelKohler K301AQS
Engine type4-stroke, L-head (side valve), single-cylinder
Displacement476 cm3, (29.0 cu·in)
Bore and stroke85.7 mm X 82.6 mm (3.37 in X 3.25 in)
Compression ratio6.0:1
Max. horsepower12.2 PS (9.0 kW; 12.0 HP) at 3,600 rpm
Cooling systemForced air
Lubricating systemSplash type
Fuel systemCarburetor
Starting systemElectirc 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
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
Chassis4×2 2WD
Steering typeManual
Transmission manufacturer or modelSundstrand 15
Transmission typeShaft-driven hydrostatic
GearsInfinite forward and reverse


Front tiresLawn/turf:
Rear tiresLawn/turf:

Electrical system

Electrical system
Charging system
Charging amps

Serial numbers

John Deere 312 serial numbers


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Cutting width960 mm (38 in)
John Deere 46″ mid-mount mower deck
Cutting width1,160 mm (46 in)
John Deere 49: 46″ front-mount one-stage snow blower with hydraulic-lift
Cleaning width1,160 mm (46 in)
Weight89 kg (197 lb)
John Deere 320 loader
Height (to pin)1,800 mm (71 in)
Loader weight143 kg (316 lbs)
Clearance, dumped bucket1,290 mm (51 in)
Dump reach300 mm (12 in)
Dump angle55°
Clearance, level bucket1,570 mm (62 in)
Reach at ground220 mm (9 in)
Breakout force (lift)340 kg (750 lbs)
Lift to full height (at pin)226 kg (500 lbs)
Bucket width 1,010 mm (40 in)
1,210 mm (48 in)
1,520 mm (60 in)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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.

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