Cub Cadet 73

Cub Cadet 73The Cub Cadet 73 is a lawn tractor model from the 1X2/1X3 series, manufactured from 1969 to 1971 by Cub Cadet (a part of International Harvester) in Louisville, Kentucky, USA. It was available in two-wheel drive (2WD) version.

The Cub Cadet 73 is equipped with a 262 cc (16.23 cu·in) single-cylinder gasoline engine with 73.0 mm (2.87 in) of the cylinder bore and 63.5 mm (2.5 in) of the piston stroke, and one of two transmissions: a shaft-driven gear type transmission with 3 forward and 1 reverse gear and with dry disc clutch (6 forward and 2 reverse gears with creeper).

The Cub Cadet 73 lawn tractor features:

  • The Kohler K161 gasoline engine which produces 7.1 PS (5.2 kW; 7.0 HP) at 3,600 rpm of horsepower
  • Manual steering
  • Dry disc brakes
  • Open operator station
  • Cub Cadet three-point rear hitch (optional)
  • Independent front PTO with 3.600 rpm
  • Transmission rear PTO with 515 rpm and with mechanical dry disc clutch

General specifications

General Specifications
Model Cub Cadet 73
Tractor type Lawn tractor
Production years 1969-1971
Factory Louisville, Kentucky, USA
Dimensions and weight
Length 1,620 mm (63.8 in)
Width 840 mm (33.1 in)
Height (steering wheel) 1,000 mm (39.4 in)
Wheel base 1,090 mm (42.9 in)
Ground clearance 150 mm (5.9 in)
Weight 258 kg (569 lbs)
Fuel capacity
Fuel tank capacity 4.7 liters (1.2 US gal.; 1 Imp. gal)

Engine

Engine Specifications
Engine model Kohler K161S – electric starter
Kohler K161T – retractable starter
Engine type 4-stroke, L-head, single-cylinder
Displacement 262 cm3, (16.23 cu·in)
Bore and stroke 73.025 mm X 63.5 mm (2.87 in X 2.5 in)
Fuel type Gasoline
Max. horsepower 7.1 PS (5.2 kW; 7.0 HP) at 3,600 rpm
Cooling system Forced air
Lubricating system Splash type
Fuel system Carburetor
Ignition system Magneto ignition system for retractable starter
Battery ignition system for electric starter
Starting system Retractable starter or
Electric starter 12V
Valve clearance
Intake valve clearance: 0.15-0.20 mm (0.0059-0.0079 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: 1.2 L (1.27 US. qt, 1.06 Imp. qt.)
Ignition system
Spark plug: Champion RJ8C
Spark plug gap: 0.65 mm (0.0256 in)
Spark plug torque: 27 N·m (2.8 kg·m, 19.9 ft·lb)
Ignition timing: 20° B.T.D.C.
Compression pressure
Normal: 7.7-8.4 kg/cm2 (7.6-8.3 bar, 110-120 psi) / 1,000 rpm

Transmission and chassis

Chassis, steering and brakes
Chassis 4×2 2WD
Steering type Manual
Brakes Dry disc
Transmission
Transmission manufacturer or model
Transmission type Shaft-driven gear type with dry disc clutch
Gears 3 forward and 1 reverse
Speed Forward: 10.9 kmh (6.8 mph)
Reverse: 4.0 kmh (2.5 mph)
Transmission oil capacity 3.3 L (0.9 US. gal, 0.7 Imp. gal.)
Transmission № 2
Transmission manufacturer or model
Transmission type Shaft-driven gear type with creeper and dry disc clutch
Gears 6 forward and 2 reverse
Speed Forward: 10.9 kmh (6.8 mph)
Reverse: 4.0 kmh (2.5 mph)
Transmission oil capacity 3.8 L (1 US. gal, 0.8 Imp. gal.)

Tires

Tires
Front tires Lawn/turf: 4.80×4.00-8
Rear tires Lawn/turf: 6-12

Rear Hitch

Three-Point Hitch
Category Cub Cadet three-point (optional)
Control type
Lift capacity (at ends)

PTO (Power take-off shaft)

PTO
Front PTO type Independent
Front PTO speed 3.600 rpm
Rear PTO type Transmission with mechanical dry disc
Rear PTO speed 515 rpm

Electrical system

Electrical system
Ground Negative
Charging system Generator
Charging amps 15A
Battery 12V

Serial numbers

Cub Cadet 73 serial numbers
1969 307000
1970 322858
1971 373301
Final 400000

Attachments

Cub Cadet: 38″ mower deck with 3-blade and manual lift (electric optional)
Cutting width 960 mm (38 in)
Cutting height: 20-100 mm (1-4 in)
Cub Cadet: 42″ mower deck with 3-blade and manual lift (electric optional)
Cutting width 1,060 mm (42 in)
Cutting height: 20-100 mm (1-4 in)
Cub Cadet: 48″ mower deck with 3-blade and manual lift (electric optional)
Cutting width 1,210 mm (48 in)
Cutting height: 20-100 mm (1-4 in)
Cub Cadet 42″ blade and manual lift and manual angle
Cutting width 1,060 mm (42 in)
Height: 400 mm (16 in)
Cub Cadet QA-36: 36″ front-mount snow blower with manual lift
Cleaning width 910 mm (36 in)
Cub Cadet QA-42: 42″ front-mount snow blower with manual lift
Cleaning width 1,060 mm (42 in)

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