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SPECS / COMPARISON

Bobcat 630 vs Bobcat 643

A detailed comparison of the Bobcat 630 and the Bobcat 643. Click a model name to view its full specifications.

Horsepower
Bobcat 63020.9 kW (28.0 HP)
Bobcat 64321.3 kW (28.5 HP)
Operating Weight
Bobcat 6301769.0 kg (3900 lbs)
Bobcat 6431905.1 kg (4200 lbs)
SpecificationBobcat 630Bobcat 630Skid SteersBobcat 643Bobcat 643Skid Steers
TypeSkid steerSkid steer
Lift DesignVerticalRadial
Years Made1977-19801981-1986
Horsepower20.9 kW (28.0 HP)21.3 kW (28.5 HP)
Rating Operating Capacity (35% Tipping)326.6 kg (720 lbs)326.6 kg (720 lbs)
Rating Operating Capacity (50% Tipping)453.6 kg (1000 lbs)590 kg (1000 lbs)
Operating Weight1769.0 kg (3900 lbs)1905.1 kg (4200 lbs)
Tipping Load929.9 kg (2050 lbs)997.9 kg (2200 lbs)
Maximum Travel Speed10.6 km (6.6 mph)10.6 km (6.6 mph)
Pump Capacity36.0 LPM (9.5 GPM)36.0 LPM (9.5 GPM)
Relief Valve Pressure134.4 Bar (1950 psi)131.0 Bar (1900 psi)
Hydraulic Tank Capacity22.7 L (6.0 gal)13.2 L (3.5 gal)
Raise Lift Arms4.0 seconds3.6 seconds
Lower Lift Arms2.5 seconds2.9 seconds
Bucket Rollback1.6 seconds2.2 seconds
Bucket Dump2.2 seconds2.7 seconds
Engine ManufacturerWisconsinKubota
Engine ModelVH4DD1402
Engine TypeGasolineDiesel
No of Cylinders43
Rated Speed2500 RPM2500 RPM
Torque Speed1800 RPM—
Firing Order1-3-4-21-3-4-2
Gross Power20.9 kW (28.0 HP)23.9 kW (32.0 HP)
Displacement1765 cc (108 cu in.)1395 cc (85 cu in.)
Bore8.3 cm (3.3 in.)8.5 cm (3.3 in.)
Stroke8.3 cm (3.3 in.)8.2 cm (3.2 in.)
Peak Torque89 N∙m (66 ft-lb)86 N∙m (63 ft-lb)
Engine Oil Capacity3.8 L (1.0 gal)6.6 L (1.7 gal)
Fuel Tank Capacity37.9 L (10.0 gal)49.2 L (13.0 gal)
Cab Height191.9 cm (75.6 in.)192.5 cm (75.8 in.)
Bucket Hinge Pin Height275.9 cm (108.6 in.)276.9 cm (109.0 in.)
Width135.9 cm (53.5 in.)137.2 cm (54.0 in.)
Length with Bucket305.3 cm (120.2 in.)305.3 cm (120.2 in.)
Dump Height219.2 cm (86.3 in.)219.2 cm (86.3 in.)
Dump Reach55.0 cm (21.6 in.)55.4 cm (21.8 in.)
Ground Clearance18.0 cm (7.1 in.)19.1 cm (7.5 in.)
Dump Angle30 °37 °
Rollback Angle26 °26 °
Departure Angle27 °28 °
Front Tire7.00×15.67.00×15.6
Rear Tire7.00×15.67.00×15.6
Combustion Chamber—Spherical type
Compression Ratio—21.0
Coolant Capacity—10.4 L (2.7 gal)

Values come from the manufacturer-sourced model files; empty cells mean the property is not published for that model. No performance ranking is applied.

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