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Overview

Responsible, productive earthmoving machines, built to last.

Engine

Units:
Tractor Engine Cat C18 ACERT™ Cat C18 ACERT™ Less
Scraper Engine Cat C9 ACERT™ Cat C9 ACERT™ Less

Tractor Engine

Flywheel Power - Tractor/Scraper 373 kW (500 hp) / 211 kW (283 hp) 373 kW (500 hp) / 211 kW (283 hp) Less
Net Power 345 kW (462 hp) / 373 kW (500 hp) 345 kW (462 hp) / 373 kW (500 hp) Less
Gross Power - Gears 1-2 488.0 HP 364.0 kW Less
Gross Power - Gears 3-8 526.0 HP 392.0 kW Less
Net Power - Gears 1-2 462.0 HP 345.0 kW Less
Net Power - Gears 3-8 500.0 HP 373.0 kW Less
Bore 5.7 in 145.0 mm Less
Stroke 7.2 in 183.0 mm Less
Displacement 1105.0 in³ 18.1 l Less

Scraper Engine

Net Power 198 kW (266 hp) / 211 kW (283 hp) 198 kW (266 hp) / 211 kW (283 hp) Less
Gross Power - Gear 1 286.0 HP 213.0 kW Less
Gross Power - Gears 2-4 303.0 HP 226.0 kW Less
Net Power - Gear 1 266.0 HP 198.0 kW Less
Net Power - Gears 2-4 283.0 HP 211.0 kW Less
Bore 4.4 in 112.0 mm Less
Stroke 5.9 in 149.0 mm Less
Displacement 538.0 in³ 8.8 l Less

Scraper Bowl

Scraper Capacity - Heaped 34.0 yd³ 26.0 m³ Less
Rated Load 82200.0 lb 37285.0 kg Less
Capacity - Struck 24.0 yd³ 18.3 m³ Less
Depth of Cut - Maximum 17.2 in 437.0 mm Less
Width - Cut - To Router Bits 138.3 in 3512.0 mm Less
Ground Clearance - Maximum 21.5 in 545.0 mm Less
Cutting Edge Thickness 1.12 in 28.0 mm Less
Hyd. Penetration Force - 637G 81000.0 lb 360.0 kN Less
Depth of Spread - Maximum 18.9 in 480.0 mm Less
Apron Opening 79.0 in 2007.0 mm Less
Apron Closure Force 38250.0 lb 170.0 kN Less

Transmission

Top Speed - Loaded 33.0 mile/h 54.9 km/h Less
1 Forward 3.4 mile/h 5.5 km/h Less
2 Forward 6.2 mile/h 10.0 km/h Less
3 Forward 7.6 mile/h 12.2 km/h Less
4 Forward 10.3 mile/h 16.6 km/h Less
5 Forward 13.8 mile/h 22.2 km/h Less
6 Forward 18.7 mile/h 30.1 km/h Less
7 Forward 25.2 mile/h 40.6 km/h Less
8 Forward 34.1 mile/h 54.9 km/h Less
Reverse 6.2 mile/h 9.9 km/h Less

Hydraulics

Bowl Cylinder Bore 7.2 in 184.0 mm Less
Bowl Cylinder Stroke 34.4 in 873.0 mm Less
Apron Cylinder Bore 8.2 in 210.0 mm Less
Apron Cylinder Stroke 28.6 in 727.0 mm Less
Ejector Cylinder Bore 8.2 in 210.0 mm Less
Ejector Cylinder Stroke 74.0 in 1880.0 mm Less
Steering Circuit 100.0 gal/min 379.0 l/min Less
Scraper Circuit 91.0 gal/min 344.0 l/min Less
Cushion Hitch Circuit 9.0 gal/min 34.5 l/min Less
Secondary Steering Circuit 100.0 gal/min 379.0 l/min Less
Relief Valve - Steering Circuit 1987.0 psi 13700.0 kPa Less
Relief Valve - Implement Circuit 2030.0 psi 14000.0 kPa Less
Compensator Settings - Cushion Hitch Circuit 2320.0 psi 16000.0 kPa Less

Steering

Width - 180° Turn 40.02 ft 12.2 m Less
Width - 180° Turn - Right 40.1 ft 12.2 m Less
Steering Angle - Right 90° 90° Less
Steering Angle - Left 85° 85° Less
Hydraulic Output 100.0 gal/min 379.0 l/min Less

Service Refill Capacities - Tractor

Cooling System 29.0 gal (US) 110.0 l Less
Crankcase 11.9 gal (US) 45.0 l Less
Differential 39.0 gal (US) 148.0 l Less
Final Drive - Each 6.1 gal (US) 23.0 l Less
Fuel Tank - 637G 335.0 gal (US) 1268.0 l Less
Hydraulic Reservoir 50.2 gal (US) 190.0 l Less
Transmission 29.0 gal (US) 110.0 l Less
Wheel Coolant - Each 19.8 gal (US) 75.0 l Less
Windshield Washer 1.5 gal (US) 6.0 l Less

Service Refill Capacities - Scraper

Cooling System 20.0 gal (US) 76.0 l Less
Crankcase 7.9 gal (US) 30.0 l Less
Differential 3.2 gal (US) 12.0 l Less
Final Drive - Each 5.0 gal (US) 19.0 l Less
Fuel Tank - 637G 335.0 gal (US) 1268.0 l Less
Transmission 19.0 gal (US) 72.0 l Less
Wheel Coolant - Each 19.8 gal (US) 75.0 l Less

Dimensions

Width - Overall Machine 155.0 in 3938.0 mm Less
Width - Tractor 137.0 in 3481.0 mm Less
Width - Rear Tire Center Lines 97.0 in 2464.0 mm Less
Width - Inside of Bowl 134.0 in 3405.0 mm Less
Width - Outside Rear Tires 143.2 in 3636.0 mm Less
Width - Outside Bowl - Shipping Width 154.0 in 3914.0 mm Less
Height - Overall Shipping 168.8 in 4286.0 mm Less
Height - Top of Cab 146.3 in 3715.0 mm Less
Ground Clearance - Tractor 26.2 in 665.0 mm Less
Front of Tractor to Front Axle 132.2 in 3359.0 mm Less
Axle to Vertical Hitch Pin 21.6 in 548.0 mm Less
Height - Scraper Blade Maximum 21.5 in 545.0 mm Less
Wheel Base 345.2 in 8769.0 mm Less
Length - Overall Machine 573.4 in 14565.0 mm Less
Rear Axle - Rear of Machine 95.97 in 2437.0 mm Less
Bail Length - Maximum (Push-Pull) 195.3 in 4960.0 mm Less
Extended Push Block (Push-Pull) 108.0 in 2744.0 mm Less

Weights - Standard, Tandem

Front Axle 67700.0 lb 30708.0 kg Less
Front Axle Weight - Loaded 96503.0 lb 43773.0 kg Less
Rear Axle 47044.0 lb 21339.0 kg Less
Rear Axle - Weight - Loaded 100441.0 lb 45559.0 kg Less
Scraper Shipping 46231.0 lb 20970.0 kg Less
Total Operating - Empty 114744.0 lb 52047.0 kg Less
Total Operating - Loaded 196944.0 lb 89332.0 kg Less
Total Shipping 112760.0 lb 51147.0 kg Less
Tractor Shipping 66529.0 lb 30177.0 kg Less

Weights - Push-Pull

Total Shipping 116100.0 lb 52662.0 kg Less
Tractor Shipping 68499.0 lb 31071.0 kg Less
Scraper Shipping 47601.0 lb 21591.0 kg Less
Total Operating - Empty 118084.0 lb 53562.0 kg Less
Front Axle 69670.0 lb 31602.0 kg Less
Rear Axle 48414.0 lb 21960.0 kg Less
Total Operating - Loaded 200284.0 lb 90874.0 kg Less
Front Axle - Loaded 98139.0 lb 44515.0 kg Less
Rear Axle - Loaded 102145.0 lb 46332.0 kg Less

Transmission - 637G

1 Forward 3.4 mile/h 5.5 km/h Less
2 Forward 6.2 mile/h 10.0 km/h Less
3 Forward 7.6 mile/h 12.2 km/h Less
4 Forward 10.3 mile/h 16.6 km/h Less
5 Forward 13.8 mile/h 22.2 km/h Less
6 Forward 18.7 mile/h 30.1 km/h Less
7 Forward 25.2 mile/h 40.6 km/h Less
8 Forward 34.1 mile/h 54.9 km/h Less
Reverse 6.2 mile/h 9.9 km/h Less

637G Standard Equipment

ELECTRICAL
  • Alarm, backup
  • Alternator, 75 amp - tractor engine
  • Alternator, 35 amp - scraper engine
  • Batteries (4), 12V Maintenance Free, High Output
  • Batteries (2), 12V Maintenance Free, High Output
  • Electrical System, 24V
  • Lighting System - Tractor
  • Lighting System - Scraper
  • Starting Receptacle - tractor and scraper engines

OPERATOR ENVIRONMENT
  • Air Conditioner (includes heater and defroster)
  • Cigarette Lighter and Ashtray
  • Coat Hook
  • Diagnostic Connection Port (12V)
  • Dome Courtesy Light
  • Gauge Group
  • Horn
  • Implement Control Joystick
  • Rearview Mirrors
  • Radio Ready (two radio openings, speakers, and 5-amp converter)
  • ROPS Cab with Sound Suppression and Pressurization
  • Static Seatbelt
  • Scraper Engine Controls
  • Seat, Air Suspension, Caterpillar Comfort, cloth
  • Steering Wheel - tilt and telescoping
  • Storage Compartment
  • Throttle Lock
  • Transmission Hold
  • Windows - sliding side, swing out
  • Windshield - laminated glass
  • Windshield Wiper/Washer - front and rear

POWER TRAIN
  • Engine
  • Braking System
  • Transmission

OTHER STANDARD EQUIPMENT
  • Extended Life Coolant, -36° C (-33° F)
  • Fan hub, permanent lube
  • Fast Oil Change
  • Fenders
  • Rims - 35 inch (2)
  • Tires, 37.50-R35 radial
  • Tractor:
  • Scraper:

Power Train - Engine

Power Train - Transmission

Structures

Operator Station

Electronic Controls

Scraper Bowl

Push-Pull Arrangement

Auger Arrangement

Serviceability

Customer Support