Case industrial tractors

J.I. Case 646

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.

Power-

Founded-

Model646

View Images

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	ModelJ.I. Case D100 Backhoe Swing Arc167° Bucket force5295 lbs (2401 kg) Loading height63.75 inches (161 cm) Bucket Rotation143° Reach from pivot111 inches (281 cm) Transport height100.5 inches (255 cm) Dipperstick force1997 lbs (905 kg) 2-Foot flat digging depth89 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)