Cub Cadet 123 garden tractor specs and service data

The Cub Cadet 123 is a garden tractor model from the 1X2/1X3 series, manufactured from 1966 to 1967 by Cub Cadet (a part of International Harvester) in Louisville, Kentucky, USA. It was available in a two-wheel drive (2WD) version.

The Cub Cadet 123 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 Cub Cadet 123 garden tractor features:

The Kohler K301AS gasoline engine which produces 12.1 PS (8.9 kW; 12.0 HP) at 3,600 rpm of horsepower
Manual steering
Drum brakes
Open operator station
Sleeve hitch (optional)
Independent front PTO with mechanical clutch

General specifications

General Specifications
Model	Cub Cadet 123
Tractor type	Garden tractor
Production years	1966-1967
Factory	Louisville, Kentucky, USA
Dimensions and weight
Length	1,600 mm (63 in)
Width	840 mm (33.1 in)
Height	1,010 mm (39.8 in)
Wheel base	1,090 mm (42.9 in)
Ground clearance	150 mm (5.9 in)
Weight	374 kg (825 lbs)
Fuel capacity
Fuel tank capacity	7.6 liters (2 US gal.; 1.7 Imp. gal)

Engine

Engine Specifications
Engine model	Kohler K301S
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
Oil capacity:	1.4 L (1.5 US. qt, 1.2 Imp. qt.)
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	Drum
Transmission
Transmission manufacturer or model	Sunstrand
Transmission type	Shaft-driven hydrostatic
Gears	Infinite forward and reverse
Speed	Forward: 12.9 kmh (8 mph) Reverse: 4.6 kmh (2.9 mph)
Transmission oil capacity	6.6 L (1.7 US. gal, 1.5 Imp. gal.)

Tires

Tires
Front tires	Lawn/turf: 4.80×4.00-8
Rear tires	Lawn/turf: 23×8.50-12

Rear Hitch

Three-Point Hitch
Category	Sleeve hitch
Control type	–
Lift capacity (at ends)	–

PTO (Power take-off shaft)

PTO
Front PTO type	Independent with mechanical clutch
Front PTO speed	–

Electrical system

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

Serial numbers

Cub Cadet 123 serial numbers
1966	U157490
1967	U180268
Final	U218009

Attachments

Cub Cadet 38″ mid-mount mower deck with 3-blade and manual lift
Cutting width	960 mm (38 in)
Cut height	20-100 mm (1-40 in)
Cub Cadet 42″ mid-mount mower deck with 3-blade and manual lift
Cutting width	1,060 mm (42 in)
Cut height	20-100 mm (1-40 in)
Cub Cadet 48″ mid-mount mower deck with 3-blade and manual lift
Width	1,210 mm (48 in)
Cut height	20-100 mm (1-4 in)
Cub Cadet 42″ front-mount blade
Cutting width	1,060 mm (42 in)
Cut height	40 mm (16 in)
Cub Cadet 36″ front-mount snow blower with manual lift
Width	910 mm (36 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.

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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.

Cub Cadet 123