Bolens HT20

The Bolens HT20 is a garden tractor model from the Large Frame series, manufactured from 1973 to 1978 by Bolens in Port Washington, Wisconsin, USA. It was available in two-wheel drive (2WD) version.

The Bolens HT-20 is equipped with a 880 cc (53.7 cu·in) two-cylinder gasoline engine with 85.7 mm (3.37 in) of the cylinder bore and 76.2 mm (3.00 in) of the piston stroke, and a shaft-driven hydrostatic transmission with infinite forward and reverse gears.

The Bolens HT20 garden tractor features:

• The Kohler K532 gasoline engine which produces 19.7 PS (14.5 kW; 19.5 HP) at 3,450 rpm of horsepower
• Manual steering
• Disc brakes
• Open operator station
• Sleeve hitch (optional)
• Front PTO with mechanical clutch and 2000 rpm

General specifications

General Specifications
Model	Bolens HT20
Tractor type	garden tractor
Production years	1973-1978
Factory	Port Washington, Wisconsin, USA
Dimensions and weight
Length	1,900 mm (74.8 in)
Width	Max: 1,190 mm (46.9 in) Min: 960 mm (37.8 in)
Height	1,140 mm (44.9 in)
Wheel base	1,320 mm (52 in)
Ground clearance	210 mm (8.3 in)
Weight	494 kg (1,089 lbs)
Fuel capacity
Fuel tank capacity	18.9 liters (5.0 US gal.; 4.2 Imp. gal)

Engine

Engine Specifications
Engine model	Kohler K532
Engine type	4-stroke, L-head (side valve), single-cylinder
Displacement	880 cm3, (53.7 cu·in)
Bore and stroke	85.7 mm X 76.2 mm (3.37 in X 3.00 in)
Max. horsepower	19.7 PS (14.5 kW; 19.5 HP) at 3,450 rpm
Cooling system	Forced air
Lubricating system	Splash type
Fuel system	Carburetor
Starting system	Electirc starter
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:	3.8 L (4 US. qt, 3.3 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	Disc
Transmission
Transmission manufacturer or model	Sundstrand 15
Transmission type	Shaft-driven hydrostatic
Gears	Infinite forward and reverse
Speed	Forward: 12.9 kmh (8 mph) Reverse: 6.4 kmh (4 mph)
Transmission oil capacity	9.5 L (2.5 US. gal, 2.1 Imp. gal.)

Tires

Tires
Front tires	Ag: 18-8.50×8
Rear tires	Ag: 26-12.00×12

Rear Hitch

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

PTO (Power take-off shaft)

PTO
Front PTO type	with mechanical clutch
Front PTO speed	2000 rpm

Electrical system

Electrical system
Ground	Negative
Charging system	Alternator
Charging amps	15A
Battery	12V, 45Ah

Attachments

Bolens 54″ mid-mount mower deck
Cutting width	1,370 mm (54 in)
Bolens 54″ front-mount blade
Cutting width	1,370 mm (54 in)
Bolens 42″ front-mount single-stage snow blower
Width	1,060 mm (42 in)
Bolens 46″ front-mount two-stage snow blower
Width	1,160 mm (46 in)
Johnson 14: 48″ loader
Width	1,210 mm (48 in)
Brantly C backhoe