Caterpillar D9

The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc. It is usually sold as a bulldozer equipped with a detachable large blade and a rear ripper attachment.

Caterpillar D9
TypeHeavy bulldozer
ManufacturerCaterpillar
Length26.5 ft (8.1 m)
Width14.7 ft (4.5 m) (blade)
Height13 ft (4.0 m)
Weight108,000 lb (48,988 kg)
PropulsionContinuous track
Engine model
  • CAT C18 ACERT (D9T)
  • 3408 HEUI (D9R)
Gross power
  • 464 hp (346 kW) D9T
  • 474 hp (353 kW) D9R
Flywheel power
  • 410 hp (310 kW) D9T
  • 410 hp (310 kW) D9R
  • 375 hp (280 kW) D9N
  • 460 hp (340 kW) D9L
Drawbar pull71.6 tons
Speed
  • 7.3 mph (11.7 km/h) Forward
  • 9.1 mph (14.6 km/h) Reverse
Blade capacity
  • 17.7 cu yd (13.5 m3) 9 SU blade
  • 21.4 cu yd (16.4 m3) 9 U blade

The D9, with 354 kW (474 hp) of gross power and an operating weight of 49 short tons (44 t), is in the upper end of Caterpillar's track-type tractors, which range in size from the D2 69 kW (92 hp), 9 short tons (8.2 t), to the D11 698 kW (935 hp), 104 short tons (94 t).

The size, durability, reliability, and low operating costs have made the D9 one of the most popular large track-type tractors in the world.

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