637G Wheel Tractor Scraper

637G Wheel Tractor Scraper

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.

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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
488HP
Gross Power - Gears 3-8
526HP
Net Power - Gears 1-2
462HP
Net Power - Gears 3-8
500HP
Bore
5.7in
Stroke
7.2in
Displacement
1105in³
Flywheel Power - Tractor/Scraper
373 kW (500 hp) / 211 kW (283 hp)

Scraper Bowl

Scraper Capacity: Heaped
34.0yd3
Rated Load
82200.0lb
Capacity Struck
24.0yd3
Depth of Cut - max.
17.2in
Width of Cut, to Router Bits
138.3in
Ground Clearance - max.
21.5in
Cutting Edge - thickness
1.12in.
Depth of Spread - max.
18.9in
Apron Opening
79.0in
Hyd. Penetration Force - 637G
81000lb
Apron Closure Force
38250lb
Scraper Capacity - Heaped
34yd³
Rated Load
82200lb
Capacity - Struck
24yd³
Depth of Cut - Maximum
17.2in
Width - Cut - To Router Bits
138.3in
Ground Clearance - Maximum
21.5in
Cutting Edge Thickness
1.12in
Depth of Spread - Maximum
18.9in
Apron Opening
79in

Transmission

Top Speed (Loaded)
33.0mph
1 Forward
3.4mph
2 Forward
6.2mph
3 Forward
7.6mph
4 Forward
10.3mph
5 Forward
13.8mph
6 Forward
18.7mph
7 Forward
25.2mph
8 Forward
34.1mph
Reverse
6.2mph
Top Speed - Loaded
33mile/h
1 Forward
3.4mile/h
2 Forward
6.2mile/h
3 Forward
7.6mile/h
4 Forward
10.3mile/h
5 Forward
13.8mile/h
6 Forward
18.7mile/h
7 Forward
25.2mile/h
8 Forward
34.1mile/h
Reverse
6.2mile/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
155.0in
Width - Tractor
137.0in
Width - rear tire center lines
97.0in
Width - Inside of Bowl
134.0in
Width - Outside Rear Tires
143.2in
Height - Overall Shipping
168.8in
Height - Top of Cab
146.3in
Ground Clearance - Tractor
26.2in
Front of Tractor to Front Axle
132.2in
Axle to Vertical Hitch Pin
21.6in
Height - Scraper Blade Maximum
21.5in
Wheelbase
345.2in
Length - overall machine
573.4in
Rear Axle to Rear of Machine
95.97in
Extended Push Block (push-pull)
108.0in
Width - Outside Bowl - Shipping Width
154in
Bail Length - Maximum (Push-Pull)
195.3in
Width - Overall Machine
155in
Width - Tractor
137in
Width - Rear Tire Center Lines
97in
Width - Inside of Bowl
134in
Width - Outside Rear Tires
143.2in
Height - Overall Shipping
168.8in
Height - Top of Cab
146.3in
Ground Clearance - Tractor
26.2in
Front of Tractor to Front Axle
132.2in
Axle to Vertical Hitch Pin
21.6in
Height - Scraper Blade Maximum
21.5in
Wheel Base
345.2in
Length - Overall Machine
573.4in
Rear Axle - Rear of Machine
95.97in
Extended Push Block (Push-Pull)
108in

Steering

Width - 180° Turn
40.02ft
Steering Angle - Right
90°
Steering Angle - Left
85°
Hydraulic Output
100.0gal/min
Width - 180° Turn - Right
40.1ft
Width - 180° Turn
40.02ft
Steering Angle - Right
90°
Steering Angle - Left
85°
Hydraulic Output
100gal/min

Service Refill Capacities - Tractor

Transmission
29.0gal
Differential
39.0gal
Final Drive (per side)
6.1gal
Cooling System
29.0gal
Hydraulic Reservoir
50.2gal
Crankcase
11.9gal (US)
Fuel Tank - 637G
335gal (US)
Wheel Coolant - Each
19.8gal (US)
Windshield Washer
1.5gal (US)
Cooling System
29gal (US)
Differential
39gal (US)
Final Drive - Each
6.1gal (US)
Hydraulic Reservoir
50.2gal (US)
Transmission
29gal (US)

Hydraulics

Bowl Cylinder Bore
7.2in
Bowl Cylinder Stroke
34.4in
Apron Cylinder Bore
8.2in
Apron Cylinder Stroke
28.6in
Ejector Cylinder Bore
8.2in
Ejector Cylinder Stroke
74.0in
Steering Circuit
100.0gal/min
Scraper Circuit
91.0gal/min
Cushion Hitch Circuit
9.0gal/min
Relief Valve - Steering Circuit
1987.0psi
Relief Valve - Implement Circuit
2030.0psi
Compensator Setting - Cushion Hitch Circuit
2320.0psi
Secondary Steering Circuit
100gal/min
Bowl Cylinder Bore
7.2in
Bowl Cylinder Stroke
34.4in
Apron Cylinder Bore
8.2in
Apron Cylinder Stroke
28.6in
Ejector Cylinder Bore
8.2in
Ejector Cylinder Stroke
74in
Steering Circuit
100gal/min
Scraper Circuit
91gal/min
Cushion Hitch Circuit
9gal/min
Relief Valve - Steering Circuit
1987psi
Relief Valve - Implement Circuit
2030psi
Compensator Settings - Cushion Hitch Circuit
2320psi

Scraper Engine

Net Power
198 kW (266 hp) / 211 kW (283 hp)
Gross Power - Gear 1
286HP
Gross Power - Gears 2-4
303HP
Net Power - Gear 1
266HP
Net Power - Gears 2-4
283HP
Bore
4.4in
Stroke
5.9in
Displacement
538in³

Weights - Standard, Tandem

Total Shipping
112760lb
Tractor Shipping
66529lb
Scraper Shipping
46231lb
Total Operating - Empty
114744lb
Front Axle
67700lb
Rear Axle
47044lb
Total Operating - Loaded
196944lb
Front Axle Weight - Loaded
96503lb
Rear Axle - Weight - Loaded
100441lb

Weights - Push-Pull

Total Shipping
116100lb
Tractor Shipping
68499lb
Scraper Shipping
47601lb
Total Operating - Empty
118084lb
Front Axle
69670lb
Rear Axle
48414lb
Total Operating - Loaded
200284lb
Front Axle - Loaded
98139lb
Rear Axle - Loaded
102145lb

Service Refill Capacities - Scraper

Fuel Tank - 637G
335gal (US)
Crankcase
7.9gal (US)
Transmission
19gal (US)
Differential
3.2gal (US)
Final Drive - Each
5gal (US)
Wheel Coolant - Each
19.8gal (US)
Cooling System
20gal (US)

Transmission - 637G

1 Forward
3.4mile/h
2 Forward
6.2mile/h
3 Forward
7.6mile/h
4 Forward
10.3mile/h
5 Forward
13.8mile/h
6 Forward
18.7mile/h
7 Forward
25.2mile/h
8 Forward
34.1mile/h
Reverse
6.2mile/h

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: