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J.I. Case 446

J.I. Case 446 tractor
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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.
J.I. Case 446garden tractorOnan B43M enginehydraulic drivelawn tractor16 hp400 Seriesmower decksnowblowerblade
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. TractorData does not list details of these 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

Related Models

J.I. Case 444

Model:444