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
Model John Deere 312
Tractor type Garden tractor
Production years 1977-1978
Factory Horicon, Wisconsin, USA
Dimensions and weight
Length
Width
Height
Wheel base
Weight 344 kg (758 lbs)
Fuel capacity
Fuel tank capacity 17.0 liters (4.5 US gal.; 3.7 Imp. gal)

Engine

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
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
Transmission
Transmission manufacturer or model Sundstrand 15
Transmission type Shaft-driven hydrostatic
Gears Infinite forward and reverse

Tires

Tires
Front tires Lawn/turf:
Rear tires Lawn/turf:

Electrical system

Electrical system
Ground Negative
Charging system
Charging amps
Battery 12V

Serial numbers

John Deere 312 serial numbers
1977 C312F070001
1978 C312G080001

Attachments

John Deere 38″ mid-mount mower deck
Cutting width 960 mm (38 in)
John Deere 46″ mid-mount mower deck
Cutting width 1,160 mm (46 in)
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)
John Deere 320 loader
Height (to pin) 1,800 mm (71 in)
Loader weight 143 kg (316 lbs)
Clearance, dumped bucket 1,290 mm (51 in)
Dump reach 300 mm (12 in)
Dump angle 55°
Clearance, level bucket 1,570 mm (62 in)
Reach at ground 220 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)

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