637G Wheel Tractor Scraper

US
Metric

Overview

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
488.00 HP
364.00 kW
Gross Power - Gears 3-8
526.00 HP
392.00 kW
Net Power - Gears 1-2
462.00 HP
345.00 kW
Net Power - Gears 3-8
500.00 HP
373.00 kW
Bore
5.70 in
145.00 mm
Stroke
7.20 in
183.00 mm
Displacement
1105.00 in³
18.10 l

Scraper Bowl

Scraper Capacity: Heaped
34.00 yd3
26.00 m3
Rated Load
82200.00 lb
37285.00 kg
Capacity Struck
24.00 yd3
18.30 m3
Depth of Cut - max.
17.20 in
437.00 mm
Width of Cut, to Router Bits
138.30 in
3512.00 mm
Ground Clearance - max.
21.50 in
545.00 mm
Cutting Edge - thickness
1.12 in.
28.00 mm
Hyd. Penetration Force - 637G
81000.00 lb
360.00 kN
Depth of Spread - max.
18.90 in
480.00 mm
Apron Opening
79.00 in
2007.00 mm
Apron Closure Force
38250.00 lb
170.00 kN

Transmission

Top Speed (Loaded)
33.00 mph
54.90 km/h
1 Forward
3.40 mph
5.50 km/h
2 Forward
6.20 mph
10.00 km/h
3 Forward
7.60 mph
12.20 km/h
4 Forward
10.30 mph
16.60 km/h
5 Forward
13.80 mph
22.20 km/h
6 Forward
18.70 mph
30.10 km/h
7 Forward
25.20 mph
40.60 km/h
8 Forward
34.10 mph
54.90 km/h
Reverse
6.20 mph
9.90 km/h

Engine

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

Scraper Engine

Net Power
198 kW (266 hp) / 211 kW (283 hp)
Gross Power - Gear 1
286.00 HP
213.00 kW
Gross Power - Gears 2-4
303.00 HP
226.00 kW
Net Power - Gear 1
266.00 HP
198.00 kW
Net Power - Gears 2-4
283.00 HP
211.00 kW
Bore
4.40 in
112.00 mm
Stroke
5.90 in
149.00 mm
Displacement
538.00 in³
8.80 l

Weights - Standard, Tandem

Total Shipping
112760.00 lb
51147.00 kg
Tractor Shipping
66529.00 lb
30177.00 kg
Scraper Shipping
46231.00 lb
20970.00 kg
Total Operating - Empty
114744.00 lb
52047.00 kg
Front Axle
67700.00 lb
30708.00 kg
Rear Axle
47044.00 lb
21339.00 kg
Total Operating - Loaded
196944.00 lb
89332.00 kg
Front Axle Weight - Loaded
96503.00 lb
43773.00 kg
Rear Axle - Weight - Loaded
100441.00 lb
45559.00 kg

Weights - Push-Pull

Total Shipping
116100.00 lb
52662.00 kg
Tractor Shipping
68499.00 lb
31071.00 kg
Scraper Shipping
47601.00 lb
21591.00 kg
Total Operating - Empty
118084.00 lb
53562.00 kg
Front Axle
69670.00 lb
31602.00 kg
Rear Axle
48414.00 lb
21960.00 kg
Total Operating - Loaded
200284.00 lb
90874.00 kg
Front Axle - Loaded
98139.00 lb
44515.00 kg
Rear Axle - Loaded
102145.00 lb
46332.00 kg

Dimensions

Width - Overall Machine
155.00 in
3938.00 mm
Width - Tractor
137.00 in
3481.00 mm
Width - rear tire center lines
97.00 in
2464.00 mm
Width - Inside of Bowl
134.00 in
3405.00 mm
Width - Outside Rear Tires
143.20 in
3636.00 mm
Width - Outside Bowl - Shipping Width
154.00 in
3914.00 mm
Height - Overall Shipping
168.80 in
4286.00 mm
Height - Top of Cab
146.30 in
3715.00 mm
Ground Clearance - Tractor
26.20 in
665.00 mm
Front of Tractor to Front Axle
132.20 in
3359.00 mm
Axle to Vertical Hitch Pin
21.60 in
548.00 mm
Height - Scraper Blade Maximum
21.50 in
545.00 mm
Wheelbase
345.20 in
8769.00 mm
Length - overall machine
573.40 in
14565.00 mm
Rear Axle to Rear of Machine
95.97 in
2437.00 mm
Bail Length - Maximum (Push-Pull)
195.30 in
4960.00 mm
Extended Push Block (push-pull)
108.00 in
2744.00 mm

Service Refill Capacities - Scraper

Fuel Tank - 637G
335.00 gal (US)
1268.00 l
Crankcase
7.90 gal (US)
30.00 l
Transmission
19.00 gal (US)
72.00 l
Differential
3.20 gal (US)
12.00 l
Final Drive - Each
5.00 gal (US)
19.00 l
Wheel Coolant - Each
19.80 gal (US)
75.00 l
Cooling System
20.00 gal (US)
76.00 l

Service Refill Capacities - Tractor

Crankcase
11.90 gal (US)
45.00 l
Fuel Tank - 637G
335.00 gal (US)
1268.00 l
Transmission
29.00 gal
110.00 L
Differential
39.00 gal
148.00 L
Final Drive (per side)
6.10 gal
23.00 L
Cooling System
29.00 gal
110.00 L
Hydraulic Reservoir
50.20 gal
190.00 L
Wheel Coolant - Each
19.80 gal (US)
75.00 l
Windshield Washer
1.50 gal (US)
6.00 l

Steering

Width - 180° Turn
40.02 ft
12.20 m
Width - 180° Turn - Right
40.10 ft
12.20 m
Steering Angle - Right
90°
Steering Angle - Left
85°
Hydraulic Output
100.00 gal/min
379.00 L/min

Hydraulics

Bowl Cylinder Bore
7.20 in
184.00 mm
Bowl Cylinder Stroke
34.40 in
873.00 mm
Apron Cylinder Bore
8.20 in
210.00 mm
Apron Cylinder Stroke
28.60 in
727.00 mm
Ejector Cylinder Bore
8.20 in
210.00 mm
Ejector Cylinder Stroke
74.00 in
1880.00 mm
Steering Circuit
100.00 gal/min
379.00 L/min
Scraper Circuit
91.00 gal/min
344.00 L/min
Cushion Hitch Circuit
9.00 gal/min
34.50 L/min
Secondary Steering Circuit
100.00 gal/min
379.00 l/min
Relief Valve - Steering Circuit
1987.00 psi
13700.00 kPa
Relief Valve - Implement Circuit
2030.00 psi
14000.00 kPa
Compensator Setting - Cushion Hitch Circuit
2320.00 psi
16000.00 kPa

Transmission - 637G

1 Forward
3.40 mile/h
5.50 km/h
2 Forward
6.20 mile/h
10.00 km/h
3 Forward
7.60 mile/h
12.20 km/h
4 Forward
10.30 mile/h
16.60 km/h
5 Forward
13.80 mile/h
22.20 km/h
6 Forward
18.70 mile/h
30.10 km/h
7 Forward
25.20 mile/h
40.60 km/h
8 Forward
34.10 mile/h
54.90 km/h
Reverse
6.20 mile/h
9.90 km/h

Engine

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

Tractor Engine

Flywheel Power - Tractor/Scraper
373 kW (500 hp) / 211 kW (283 hp)

Scraper Bowl

Scraper Capacity - Heaped
34.00 yd³
26.00 m³
Rated Load
82200.00 lb
37285.00 kg
Capacity - Struck
24.00 yd³
18.30 m³
Depth of Cut - Maximum
17.20 in
437.00 mm
Width - Cut - To Router Bits
138.30 in
3512.00 mm
Ground Clearance - Maximum
21.50 in
545.00 mm
Cutting Edge Thickness
1.12 in
28.00 mm
Depth of Spread - Maximum
18.90 in
480.00 mm
Apron Opening
79.00 in
2007.00 mm

Transmission

Top Speed - Loaded
33.00 mile/h
54.90 km/h
1 Forward
3.40 mile/h
5.50 km/h
2 Forward
6.20 mile/h
10.00 km/h
3 Forward
7.60 mile/h
12.20 km/h
4 Forward
10.30 mile/h
16.60 km/h
5 Forward
13.80 mile/h
22.20 km/h
6 Forward
18.70 mile/h
30.10 km/h
7 Forward
25.20 mile/h
40.60 km/h
8 Forward
34.10 mile/h
54.90 km/h
Reverse
6.20 mile/h
9.90 km/h

Hydraulics

Bowl Cylinder Bore
7.20 in
184.00 mm
Bowl Cylinder Stroke
34.40 in
873.00 mm
Apron Cylinder Bore
8.20 in
210.00 mm
Apron Cylinder Stroke
28.60 in
727.00 mm
Ejector Cylinder Bore
8.20 in
210.00 mm
Ejector Cylinder Stroke
74.00 in
1880.00 mm
Steering Circuit
100.00 gal/min
379.00 l/min
Scraper Circuit
91.00 gal/min
344.00 l/min
Cushion Hitch Circuit
9.00 gal/min
34.50 l/min
Relief Valve - Steering Circuit
1987.00 psi
13700.00 kPa
Relief Valve - Implement Circuit
2030.00 psi
14000.00 kPa
Compensator Settings - Cushion Hitch Circuit
2320.00 psi
16000.00 kPa

Steering

Width - 180° Turn
40.02 ft
12.20 m
Steering Angle - Right
90°
Steering Angle - Left
85°
Hydraulic Output
100.00 gal/min
379.00 l/min

Service Refill Capacities - Tractor

Cooling System
29.00 gal (US)
110.00 l
Differential
39.00 gal (US)
148.00 l
Final Drive - Each
6.10 gal (US)
23.00 l
Hydraulic Reservoir
50.20 gal (US)
190.00 l
Transmission
29.00 gal (US)
110.00 l

Dimensions

Width - Overall Machine
155.00 in
3938.00 mm
Width - Tractor
137.00 in
3481.00 mm
Width - Rear Tire Center Lines
97.00 in
2464.00 mm
Width - Inside of Bowl
134.00 in
3405.00 mm
Width - Outside Rear Tires
143.20 in
3636.00 mm
Height - Overall Shipping
168.80 in
4286.00 mm
Height - Top of Cab
146.30 in
3715.00 mm
Ground Clearance - Tractor
26.20 in
665.00 mm
Front of Tractor to Front Axle
132.20 in
3359.00 mm
Axle to Vertical Hitch Pin
21.60 in
548.00 mm
Height - Scraper Blade Maximum
21.50 in
545.00 mm
Wheel Base
345.20 in
8769.00 mm
Length - Overall Machine
573.40 in
14565.00 mm
Rear Axle - Rear of Machine
95.97 in
2437.00 mm
Extended Push Block (Push-Pull)
108.00 in
2744.00 mm
Features

Power Train - Engine

Power Train - Transmission

Structures

Operator Station

Electronic Controls

Scraper Bowl

Push-Pull Arrangement

Auger Arrangement

Serviceability

Customer Support

Sales Features

Power Train - Engine

A combination of innovations working at the point of combustion, ACERT™ technology optimizes engine performance while meeting regulations for off-road applications

Power Train - Transmission

Integrated electronics allow the machine to monitor the entire power train, reducing component stress and providing a better ride.

Structures

Superior structural design and construction optimize performance and reliability.

Operator Station

State-of-the-art productivity and operator comfort.

Electronic Controls

Integrated electronic controls provide smooth, consistent shifts through the synchronization of engine and transmission speeds.

Scraper Bowl

Designed for optimum loading, material retention and ejection.

Push-Pull Arrangement

Caterpillar offers a self-loading arrangement for the 637G.

Auger Arrangement

Excellent self-loading capability in a wide range of material.

Serviceability

Count on Caterpillar for simplified service and the most productive uptime.

Customer Support

Cat dealer services help you operate longer with lower costs.
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:
Optional Equipment
  • Auger
  • Crankcase Guard, Heavy Duty
  • Extended Life Coolant, -50° C (-58° F)
  • Fan, Defrost
  • Heater - jacket water (all engines)
  • Hydraulic Retarder
  • Lights, Side Vision
  • Lock, Steering
  • Powertrain Guard
  • Push Block - extended (scraper)
  • Push-Pull Arrangement w/ Rear Radiator Guard
  • Retractable seat belts
  • Secondary Steering