637G Wheel Tractor Scraper

Overview
Flywheel Power: Tractor/Scraper
373 kW (500 hp) / 211 kW (283 hp)
Scraper Capacity: Heaped
34 yd3
Top Speed (Loaded)
33 mph
  • Exterior View
  • Interior View

Quick loading, high travel speeds and the ability to load and dump on the run yield fast cycle times, allowing Caterpillar Wheel Tractor-Scrapers to consistently deliver high productivity at the lowest cost per ton.

Tractor Engine

Flywheel Power: Tractor/Scraper
373 kW (500 hp) / 211 kW (283 hp)
Net Power
345 kW (462 hp) / 373 kW (500 hp)
Gross Power - Gears 1-2
488 HP
Gross Power - Gears 3-8
526 HP
Net Power - Gears 1-2
462 HP
Net Power - Gears 3-8
500 HP
Bore
6 in
Stroke
7 in
Displacement
1,105 in³
Flywheel Power - Tractor/Scraper
373 kW (500 hp) / 211 kW (283 hp)

Scraper Bowl

Scraper Capacity: Heaped
34 yd3
Rated Load
82,200 lb
Capacity Struck
24 yd3
Depth of Cut - max.
17 in
Width of Cut, to Router Bits
138 in
Ground Clearance - max.
22 in
Cutting Edge - thickness
1 in.
Depth of Spread - max.
19 in
Apron Opening
79 in
Hyd. Penetration Force - 637G
81,000 lb
Apron Closure Force
38,250 lb
Scraper Capacity - Heaped
34 yd³
Rated Load
82,200 lb
Capacity - Struck
24 yd³
Depth of Cut - Maximum
17 in
Width - Cut - To Router Bits
138 in
Ground Clearance - Maximum
22 in
Cutting Edge Thickness
1 in
Depth of Spread - Maximum
19 in
Apron Opening
79 in

Transmission

Top Speed (Loaded)
33 mph
1 Forward
3 mph
2 Forward
6 mph
3 Forward
8 mph
4 Forward
10 mph
5 Forward
14 mph
6 Forward
19 mph
7 Forward
25 mph
8 Forward
34 mph
Reverse
6 mph
Top Speed - Loaded
33 mile/h
1 Forward
3 mile/h
2 Forward
6 mile/h
3 Forward
8 mile/h
4 Forward
10 mile/h
5 Forward
14 mile/h
6 Forward
19 mile/h
7 Forward
25 mile/h
8 Forward
34 mile/h
Reverse
6 mile/h

Engine

Tractor Engine
Cat C18 ACERT™
Scraper Engine
Cat C9 ACERT™
Tractor Engine
Cat C18 ACERT™
Scraper Engine
Cat C9 ACERT™

Dimensions

Width - Overall Machine
155 in
Width - Tractor
137 in
Width - rear tire center lines
97 in
Width - Inside of Bowl
134 in
Width - Outside Rear Tires
143 in
Height - Overall Shipping
169 in
Height - Top of Cab
146 in
Ground Clearance - Tractor
26 in
Front of Tractor to Front Axle
132 in
Axle to Vertical Hitch Pin
22 in
Height - Scraper Blade Maximum
22 in
Wheelbase
345 in
Length - overall machine
573 in
Rear Axle to Rear of Machine
96 in
Extended Push Block (push-pull)
108 in
Width - Outside Bowl - Shipping Width
154 in
Bail Length - Maximum (Push-Pull)
195 in
Width - Overall Machine
155 in
Width - Tractor
137 in
Width - Rear Tire Center Lines
97 in
Width - Inside of Bowl
134 in
Width - Outside Rear Tires
143 in
Height - Overall Shipping
169 in
Height - Top of Cab
146 in
Ground Clearance - Tractor
26 in
Front of Tractor to Front Axle
132 in
Axle to Vertical Hitch Pin
22 in
Height - Scraper Blade Maximum
22 in
Wheel Base
345 in
Length - Overall Machine
573 in
Rear Axle - Rear of Machine
96 in
Extended Push Block (Push-Pull)
108 in

Steering

Width - 180° Turn
40 ft
Steering Angle - Right
90°
Steering Angle - Left
85°
Hydraulic Output
100 gal/min
Width - 180° Turn - Right
40 ft
Width - 180° Turn
40 ft
Steering Angle - Right
90°
Steering Angle - Left
85°
Hydraulic Output
100 gal/min

Service Refill Capacities - Tractor

Transmission
29 gal
Differential
39 gal
Final Drive (per side)
6 gal
Cooling System
29 gal
Hydraulic Reservoir
50 gal
Crankcase
12 gal (US)
Fuel Tank - 637G
335 gal (US)
Wheel Coolant - Each
20 gal (US)
Windshield Washer
2 gal (US)
Cooling System
29 gal (US)
Differential
39 gal (US)
Final Drive - Each
6 gal (US)
Hydraulic Reservoir
50 gal (US)
Transmission
29 gal (US)

Hydraulics

Bowl Cylinder Bore
7 in
Bowl Cylinder Stroke
34 in
Apron Cylinder Bore
8 in
Apron Cylinder Stroke
29 in
Ejector Cylinder Bore
8 in
Ejector Cylinder Stroke
74 in
Steering Circuit
100 gal/min
Scraper Circuit
91 gal/min
Cushion Hitch Circuit
9 gal/min
Relief Valve - Steering Circuit
1,987 psi
Relief Valve - Implement Circuit
2,030 psi
Compensator Setting - Cushion Hitch Circuit
2,320 psi
Secondary Steering Circuit
100 gal/min
Bowl Cylinder Bore
7 in
Bowl Cylinder Stroke
34 in
Apron Cylinder Bore
8 in
Apron Cylinder Stroke
29 in
Ejector Cylinder Bore
8 in
Ejector Cylinder Stroke
74 in
Steering Circuit
100 gal/min
Scraper Circuit
91 gal/min
Cushion Hitch Circuit
9 gal/min
Relief Valve - Steering Circuit
1,987 psi
Relief Valve - Implement Circuit
2,030 psi
Compensator Settings - Cushion Hitch Circuit
2,320 psi

Scraper Engine

Net Power
198 kW (266 hp) / 211 kW (283 hp)
Gross Power - Gear 1
286 HP
Gross Power - Gears 2-4
303 HP
Net Power - Gear 1
266 HP
Net Power - Gears 2-4
283 HP
Bore
4 in
Stroke
6 in
Displacement
538 in³

Weights - Standard, Tandem

Total Shipping
112,760 lb
Tractor Shipping
66,529 lb
Scraper Shipping
46,231 lb
Total Operating - Empty
114,744 lb
Front Axle
67,700 lb
Rear Axle
47,044 lb
Total Operating - Loaded
196,944 lb
Front Axle Weight - Loaded
96,503 lb
Rear Axle - Weight - Loaded
100,441 lb

Weights - Push-Pull

Total Shipping
116,100 lb
Tractor Shipping
68,499 lb
Scraper Shipping
47,601 lb
Total Operating - Empty
118,084 lb
Front Axle
69,670 lb
Rear Axle
48,414 lb
Total Operating - Loaded
200,284 lb
Front Axle - Loaded
98,139 lb
Rear Axle - Loaded
102,145 lb

Service Refill Capacities - Scraper

Fuel Tank - 637G
335 gal (US)
Crankcase
8 gal (US)
Transmission
19 gal (US)
Differential
3 gal (US)
Final Drive - Each
5 gal (US)
Wheel Coolant - Each
20 gal (US)
Cooling System
20 gal (US)

Transmission - 637G

1 Forward
3 mile/h
2 Forward
6 mile/h
3 Forward
8 mile/h
4 Forward
10 mile/h
5 Forward
14 mile/h
6 Forward
19 mile/h
7 Forward
25 mile/h
8 Forward
34 mile/h
Reverse
6 mile/h

Power Train - Engine

Power Train - Transmission

Structures

Operator Station

Electronic Controls

Scraper Bowl

Push-Pull Arrangement

Auger Arrangement

Serviceability

Customer Support

  • 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:
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