J.I. Case 646

J.I. Case 646The J.I. Case 646 is a 2WD industrial tractor from the 600 series. This tractor was manufactured by J.I. Case from 1972 to 1980. The J.I. Case 646 is equipped with a 0.8 L (49.8 cu·in) two-cylinder gasoline engine and a hydrostatic transmission with infinite (2-range) forward and reverse gears.

The J.I. Case 646 industrial tractor used the Onan CCKA engine. It is a 0.8 L, 816 cm2, (49.8 cu·in) two-cylinder natural aspirated gasoline engine with 83.0 mm (3.27 in) of the cylinder bore and 76.0 mm (2.99 in) of the piston stroke. The compression ratio rating is 7.0:1. This engine produced 16.7 PS (12.3 kW; 16.5 HP) at 3,600 rpm of output power.

The J.I. Case 646 is equipped with manual steering, mechanical band brakes, open operator station and 18.9 liters (5 US gal.; 4.2 Imp. gal) fuel tank.

Following attachments are available for the J.I. Case 646 industrial tractor:

  • Mid-mount J.I. Case 1,110 mm (44 in) mower deck with 3-blade
  • Mid-mount J.I. Case 1,210 mm (48 in) mower deck with 3-blade
  • Front-mount J.I. Case loader

J.I. Case 646 Specifications

General Specifications
ModelJ.I. Case 646
Length2,740 mm (107.9 in)
Width1,040 mm (40.9 in)
Height (steering wheel)1,090 mm (42.9 in)
Wheel base1,210 mm (47.6 in)
Ground clearance200 mm (7.9 in)
Weight539 kg (1,188 lbs)
Fuel tank capacity18.9 liters (5 US gal.; 4.2 Imp. gal)
Battery12V, 32Ah
Cabin typeOpen operator station
Engine modelOnan CCKA
Engine typeFour-stroke, air-cooled, V
Fuel typeGasoline
Displacement0.8 L, 816 cm2, (49.8 cu·in)
Bore and stroke83.0 mm X 76.0 mm (3.27 in X 2.99 in)
Compression ratio7.0:1
Horsepower16.7 PS (12.3 kW; 16.5 HP) at 3,600 rpm
Oil capacity:3.8 L (4 US. qt, 3.3 Imp. qt.)
Spark plugChampion H8
Transmission and chassis
Chassis4×2 2WD
Steering typeManual
BrakesMechanical band
Transmission modelHy-Drive
Transmission typeHydrostatic
GearsInfinite (2-range) forward and reverse
Speed Forward: 10.5 kmh (6.5 mph) Reverse: 10.5 kmh (6.5 mph)
Front tires Industrial: 5.70-8
Rear tires Industrial: 27×8.50-15
Three-Point Hitch
Control type
Lift capacity (at ends)
Hydraulic system
Hydraulic typeOpen center
Hydraulic capacity11.4 L (3 US. gal, 2.5 Imp. gal.)
Pressure2300 psi (158.6 bar)
Pump flow9.0 gpm (34.1 lpm)
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We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. In addition, the characteristics may vary depending on the modification and market. We do not provide advice on technical issues related to the any operation or repair. We do not recommend using provided information for repairing or spare parts ordering, use only official service manuals and spare-parts catalogs.

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