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J.I. Case 646

J.I. Case 646 tractor
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The J.I. Case 646 is an industrial tractor produced from 1972 to 1980 as part of the 600 Series. It features a 16.5 hp Onan 0.8L 2-cylinder gasoline engine with hydraulic drive transmission (Hy-Drive) offering infinite forward and reverse speeds in 2 ranges. The tractor has two-wheel drive, manual steering, mechanical band brakes, and an open operator station. It has a fuel capacity of 5 gallons and a hydraulic system capacity of 3 gallons with 2300 psi pressure. Dimensions include a 48 inch wheelbase, 108 inch length with integral loader, 41 inch width at rear wheels, and weight ranging from 1190 lbs (loader-tractor) to 2580 lbs (loader-backhoe tractor). Attachments include mid-mount mower decks, front-end loader, and a J.I. Case D100 backhoe. Electrical system is 12 volts with a flywheel alternator charging system.
J.I. Case 646industrial tractorOnan enginehydraulic drive600 Seriestractor specificationsloaderbackhoe
Power-
Founded-
Model646

Technical Specifications

Detailed specifications and technical data for J.I. Case 646

Power

Engine power:16.5 hp (12.3 kW)

Engine

Type:gasoline
Model:Onan CCKA
Power:16.5 hp (12.3 kW)
Cooling:air-cooled horizontal-shaft
Starter:electric
Cylinders:2-cylinder
Point gap:0.020 inches (0.508 mm)
Rated RPM:3600
Sparkplug:Champion H8
Bore/Stroke:3.25x3.00 inches (83 x 76 mm)
Displacement:49.8 ci (0.8 L)
Oil capacity:4 qts (3.8 L)
Sparkplug gap:0.025 inches (0.635 mm)
Starter volts:12
Compression ratio:7:1
Oil change interval:50 h
Intake valve clearance:0.007 inches (0.178 mm) Cold
Exhaust valve clearance:0.016 inches (0.406 mm) Cold

Capacity

Fuel:5 gal (18.9 L)
Hydraulic system:3 gal (11.4 L)

Electrical

Ground:negative
Battery AH:32
Battery volts:12
Charging amps:20
Charging volts:12
Charging system:flywheel alternator

Hydraulics

Type:open center
Capacity:3 gal (11.4 L)
Pressure:2300 psi (158.6 bar)
Pump flow:9 gpm (34.1 lpm)

Mechanical

Drive:Two-wheel drive
Brakes:Mechanical band brakes
Steering:Manual steering
Operator station:Open operator station

Production

Type:Industrial tractor
Series:600 Series
Manufacturer:J.I. Case
Years produced:1972 - 1980

Attachments

Backhoe

Model:J.I. Case D100 Backhoe
Swing Arc:167°
Bucket force:5295 lbs (2401 kg)
Loading height:63.75 inches (161 cm)
Bucket Rotation:143°
Reach from pivot:111 inches (281 cm)
Transport height:100.5 inches (255 cm)
Dipperstick force:1997 lbs (905 kg)
2-Foot flat digging depth:89 inches (226 cm)
Front-end loader:600 lbs lift (full at pin) (272 kg), 54° dump, 13.75 inches reach (dumped) (34 cm), 18° rollback, 71.75 inches height (at pin) (182 cm), 52.88 inches clearance (dumped) (134 cm), Bucket width: 44 inches (111 cm)
44" mid-mount mower deck:44 inches (111 cm), 3-blade
48" mid-mount mower deck:48 inches (121 cm), 3-blade

Transmission

Type:hydraulic drive
Gears:infinite forward and reverse (2-range)
Model:Hy-Drive

Tractor hitch

Rear Type:0

Dimensions & Tires

Width:41 inches (104 cm) At rear wheels
Length:108 inches (274 cm) Length with integral loader.
Weight:1190 lbs (539 kg) loader-tractor, 2580 lbs (1170 kg) loader-backhoe tractor
Rear tire:27x8.50-15
Wheelbase:48 inches (121 cm)
Front tire:5.70-8
Ground clearance:8.25 inches (20 cm)
Height (steering wheel):43.25 inches (109 cm)

Related Models

J.I. Case 648

Model:648

J.I. Case 644

Model:644