J.I. Case lawn tractors
J.I. Case 446
The J.I. Case 446 is a garden tractor produced from 1972 to 1988 as part of the 400 Series. It features a 16 hp Onan B43M 709cc 2-cylinder air-cooled gasoline engine, a hydraulic HY-Drive transmission with infinite forward and reverse speeds, and two-wheel drive with manual steering. The tractor has a wheelbase of 46 inches, weighs 770 lbs, and uses lawn/turf tires sized 6.50-8 front and 8.00-16 rear. It includes an open operator station and mechanical band brakes. The hydraulic system is open center with 1.6 gallons capacity and 8 gpm pump flow. Attachments include 44" and 48" mid-mount mower decks, a 48" snowblower, and a 54" front-mount blade. The tractor was built in Winneconne, Wisconsin, USA.
Power16 hp
Founded44/48" deck
Model446
Technical Specifications
Detailed specifications and technical data for J.I. Case 446
Power
| Gross power | 16 hp (11.9 kW) |
|---|
Tires
| Lawn/turf rear | 8.00-16 |
|---|---|
| Lawn/turf front | 6.50-8 |
Engine
| Type | gasoline |
|---|---|
| Model | Onan B43M |
| Cooling | air-cooled horizontal-shaft |
| Cylinders | 2-cylinder |
| Point gap | 0.021 inches (0.533 mm) |
| Rated RPM | 3600 |
| Sparkplug | Champion RH18Y |
| Bore/Stroke | 3.25x2.625 inches (83 x 67 mm) |
| Compression | 7:1 |
| Displacement | 709 cc (43.3 ci) |
| Oil capacity | 2 qts (1.9 L) |
| Power (gross) | 16 hp (11.9 kW) |
| Sparkplug gap | 0.025 inches (0.635 mm) |
| Starter volts | 12 |
| Oil change interval | 25 h |
| Intake valve clearance | 0.005 inches (Cold) (0.127 mm) |
| Exhaust valve clearance | 0.013 inches (Cold) (0.330 mm) |
Features
| Drive | Two-wheel drive |
|---|---|
| Brakes | Mechanical band brakes |
| Steering | Manual steering |
| Operator station | Open operator station |
Capacities
| Fuel | 3 gal (11.4 L) |
|---|---|
| Hydraulic system | 1.6 gal (6.1 L) |
Dimensions
| Width | 41 inches (104 cm) |
|---|---|
| Length | 72 inches (182 cm) |
| Wheelbase | 46 inches (116 cm) |
| Rear tread | 31.5 inches (80 cm) |
| Front tread | 33.5 inches (85 cm) |
| Height (hood) | 38.5 inches (97 cm) |
| Shipping weight | 770 lbs (349 kg) |
| Ground clearance | 11 inches (27 cm) |
| Height (steering wheel) | 43.3 inches (109 cm) |
Electrical
| Ground | negative |
|---|---|
| Battery AH | 24 |
| Battery volts | 12 |
| Charging amps | 15 |
Hydraulics
| Type | open center |
|---|---|
| Valves | 2 |
| Capacity | 1.6 gal (6.1 L) |
| Pump flow | 8 gpm (30.3 lpm) |
Production
| Type | Garden tractor |
|---|---|
| Series | 400 Series |
| Built in | Winneconne, Wisconsin, USA |
| Years produced | 1972 - 1988 |
References
| Book | Time-saving experts published in 1975, by J.I. Case |
|---|
Attachments
| Note | Garden tractors are capable of using tillers, plows, or other ground-engaging attachments. |
|---|---|
| Blade | 54 inches width (137 cm), front-mount |
| Snowblower | 48 inches width (121 cm), front-mount |
| 44" mid-mount mower deck | 44 inches (111 cm) |
| 48" mid-mount mower deck | 48 inches (121 cm) |
Transmission
| Type | hydraulic drive |
|---|---|
| Gears | infinite forward and reverse (2-range) |
| Model | HY-Drive |
| Controls | Brake, Forward/reverse, Throttle, Range shift, Parking brake |
| Description | The HY-Drive uses a fixed-displacement hydraulic pump to power a two-speed transaxle. |
Serial numbers
| 1972 | 9668001 |
|---|---|
| 1973 | 9678031 |
| 1974 | 9694673 |
| 1975 | 9713265 |
| 1976 | 9727857 |
| 1977 | 9740617 |
| 1978 | 9754759 |
| 1979 | 9767590 |
| 1980 | 9785820 |
| 1981 | 14009950 |
| 1982 | 14025407 |
| 1983 | 14040936 |
| 1984 | 14060091 |
| 1985 | 14073621 |
| 1986 | 14095530 |
| 1987 | 14112151 |
| 1988 | 14112874 |