The Caterpillar 637D is a twin-engine wheel tractor-scraper used for high-volume earthmoving, haul, and site preparation work. As part of Caterpillar's scraper lineup, the 637D is designed to load, carry, and spread material efficiently over medium to long distances. It typically features a bowl, apron, ejector, and rear push-pull capability depending on configuration. The machine is used in road construction, mining support, land development, and large-scale grading projects. The 637D is known for its heavy-duty frame, large-capacity bowl, and serviceability. It remains a recognized model in the Caterpillar scraper category for production earthmoving applications.

Bowl
Heaped Capacity	31 cu yd (24 cu m)
Max Depth of Cut	19 in (49 cm)
Rated Payload	74,957 lbs (34,000 kg)
Struck Capacity	21 cu yd (16 cu m)
Width of Cut	12 ft (4 m)
Dimensions
Overall Height	14 ft (4 m)
Overall Length	49 ft (15 m)
Overall Width	13 ft (4 m)
Wheelbase	29 ft (9 m)
Operating Specifications
Fuel Capacity	371 gal (1,403 l)
Tire Size	33.25-35 38PR (E-3)
Scraper Engine
Displacement	641 cu in (10,501 cu cm)
Make	Caterpillar
Net Power	255 hp (190 kw)
Power Measured @	2,200 rpm
Tractor Engine
Displacement	1,099 cu in (18,001 cu cm)
Make	Caterpillar
Net Power	450 hp (336 kw)
Power Measured @	2,000 rpm
Transmission
Max Speed Forward	32 mph (51 kph)
Number of Forward Gears	8
Weights
Front Axel - loaded	90,566 lbs (41,080 kg)
Front Axle - empty	64,768 lbs (29,378 kg)
Rear Axle - empty	41,407 lbs (18,782 kg)
Rear Axle - loaded	90,566 lbs (41,080 kg)
Total Operating - empty	106,175 lbs (48,160 kg)
Total Operating - Loaded	181,132 lbs (82,160 kg)

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1979 Caterpillar 637D For Sale in Burnaby, BC

Ritchie Bros. Auctioneers

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