The 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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