Category : Scrapers ➔ Manufacturer : Caterpillar ➔ Model : 637G ➔
The Caterpillar 637G is a wheel tractor-scraper in Caterpillar's scraper lineup, designed for high-production earthmoving, haul, and grading applications. It is commonly used in large-scale site preparation, road construction, mining, and bulk material handling. The 637G features a two-engine scraper configuration with a tractor and scraper bowl arrangement, providing efficient loading, hauling, and spreading of soil and aggregate. Known for its large-capacity bowl, articulated steering, and heavy-duty undercarriage, the model is built for moving substantial volumes of material over moderate distances. The Caterpillar 637G is part of Caterpillar's G-series scrapers used in demanding earthmoving operations.
Bowl
Caterpillar 637G Scraper Bowl specifications
Heaped Capacity
31 cu yd
Max Depth Of Cut
17.20 in (43.69 cm)
Rated Payload
75,000.00 lbs (34,019.47 kg)
Struck Capacity
21 cu yd
Width Of Cut
11.60 ft (3.54 m)
Dimensions
Caterpillar 637G Scraper Dimensions specifications
Axle To Vertical Hitch Pin
21.60 in (54.86 cm)
Bail Length - Maximum (Push-Pull)
195.30 in (496.06 cm)
Extended Push Block (Push-Pull)
108.00 in (274.32 cm)
Front Of Tractor To Front Axle
135.25 in (343.53 cm)
Ground Clearance - Tractor
26.20 in (66.55 cm)
Height
14.08 ft (4.29 m)
Height - Overall Shipping
168.75 in (428.62 cm)
Height - Scraper Blade Maximum
21.50 in (54.61 cm)
Height - Top Of Cab
12.20 ft (3.72 m)
Height - Top Of Scraper
13.71 ft (4.18 m)
Height To Top Of Cab
12.19 ft (3.72 m)
Length
47.75 ft (14.55 m)
Length - Overall
50.75 ft (15.47 m)
Length - Overall Machine
573.40 in (1,456.44 cm)
Overall Height
14.07 ft (4.29 m)
Overall Length
47.78 ft (14.56 m)
Overall Width
12.92 ft (3.94 m)
Rear Axle - Rear Of Machine
95.75 in (243.20 cm)
Tractor Ground Clearance
2.19 ft (0.67 m)
Tread - Scraper
8.07 ft (2.46 m)
Tread - Tractor
8.07 ft (2.46 m)
Weight
112,760.00 lbs (51,147.14 kg)
Wheel Base
28.77 ft (8.77 m)
Wheelbase
28.77 ft (8.77 m)
Width
12.92 ft (3.94 m)
Width - Inside Of Bowl
134.00 in (340.36 cm)
Width - Outside Bowl - Shipping Width
154.00 in (391.16 cm)
Width - Outside Rear Tires
143.20 in (363.73 cm)
Width - Overall
12.93 ft (3.94 m)
Width - Overall Machine
155.00 in (393.70 cm)
Width - Rear Tire Center Lines
97.00 in (246.38 cm)
Width - Tractor
137.00 in (347.98 cm)
Engine
Caterpillar 637G Scraper Engine specifications
Flywheel Power - Tractor/Scraper
373 kw (500 hp) / 211 kW (283 hp)
Scraper Engine
Cat C9 with ACERT Technology
Tractor Engine
Cat C18 with ACERT Technology
Hydraulics
Caterpillar 637G Scraper Hydraulics specifications
Apron Cylinder Bore
8.30 in (21.08 cm)
Apron Cylinder Stroke
28.60 in (72.64 cm)
Bowl Cylinder Bore
7.30 in (18.54 cm)
Bowl Cylinder Stroke
34.40 in (87.38 cm)
Compensator Settings - Cushion Hitch Circuit
2320 psi
Cushion Hitch Circuit
9.00 gpm (34.07 lpm)
Ejector Cylinder Bore
8.30 in (21.08 cm)
Ejector Cylinder Stroke
74.00 in (187.96 cm)
Relief Valve - Implement Circuit
2030 psi
Relief Valve - Steering Circuit
1987 psi
Scraper Circuit
91.00 gpm (344.44 lpm)
Secondary Steering Circuit
100.00 gpm (378.50 lpm)
Steering Circuit
100.00 gpm (378.50 lpm)
Operating Specifications
Caterpillar 637G Scraper Operating Specifications specifications
180 Degrees Curb-To-Curb Turning Width
45.00 ft (13.72 m)
Rated Load
76,000.00 lbs (34,473.06 kg)
Scraper Capacity - Heaped
50 cu yd
Scraper Capacity - Struck
41 cu yd
Top Speed - Loaded
33.00 mph (53.11 kph)
Operational
Caterpillar 637G Scraper Operational specifications
Alternator Supplied Amperage
75 amps
Cooling System Fluid Capacity
52.00 gal (196.82 l)
Differential Fluid Capacity
40.50 gal (153.29 l)
Engine Oil Fluid Capacity
18.90 gal (71.54 l)
Fuel Capacity
335.00 gal (1,267.98 l)
Hydraulic System Fluid Capacity
50.00 gal (189.25 l)
Operating Voltage
24 V
Tire Size
37.50-R35
Transmission Fluid Capacity
45.70 gal (172.97 l)
Wheel Coolant Fluid Capacity - Each
39.00 gal (147.62 l)
Scraper Bowl
Caterpillar 637G Scraper Scraper Bowl specifications
Apron Closure Force
38,250.00 lbs (17,349.93 kg)
Apron Opening
79.00 in (200.66 cm)
Capacity - Struck
24 cu yd
Cutting Edge Thickness
1.20 in (3.05 cm)
Depth Of Cut - Maximum
17.20 in (43.69 cm)
Depth Of Spread - Maximum
18.90 in (48.01 cm)
Ground Clearance - Maximum
21.50 in (54.61 cm)
Hyd. Penetration Force - 621g
81,000.00 lbs (36,741.03 kg)
Hyd. Penetration Force - 637g
81,000.00 lbs (36,741.03 kg)
Rated Load
82,260.00 lbs (37,312.55 kg)
Scraper Capacity - Heaped
34 cu yd
Width - Cut - To Router Bits
138.30 in (351.28 cm)
Scraper Engine
Caterpillar 637G Scraper Scraper Engine specifications
Bore
4.50 in (11.43 cm)
Displacement
538.00 cu in (8,816.26 cu cm)
Gross Power
270.00 hp (201.34 kw)
Gross Power - Gear 1
274.00 hp (204.33 kw)
Gross Power - Gears 2-4
299.00 hp (222.97 kw)
Make
Caterpillar
Net Power - Gear 1
249.00 hp (185.68 kw)
Net Power - Gears 2-4
274.00 hp (204.33 kw)
Stroke
5.90 in (14.99 cm)
Service Refill Capacities - Scraper
Caterpillar 637G Scraper Service Refill Capacities - Scraper specifications
Cooling System
20.00 gal (75.70 l)
Crankcase
7.90 gal (29.90 l)
Differential
3.20 gal (12.11 l)
Final Drive - Each
5.00 gal (18.93 l)
Fuel Tank - 637g
335.00 gal (1,267.98 l)
Transmission
19.00 gal (71.92 l)
Wheel Coolant - Each
19.80 gal (74.94 l)
Service Refill Capacities - Tractor
Caterpillar 637G Scraper Service Refill Capacities - Tractor specifications
Cooling System
29.00 gal (109.77 l)
Crankcase
11.90 gal (45.04 l)
Differential
39.00 gal (147.62 l)
Final Drive - Each
6.10 gal (23.09 l)
Fuel Tank - 637g
335.00 gal (1,267.98 l)
Hydraulic Reservoir
50.20 gal (190.01 l)
Transmission
29.00 gal (109.77 l)
Wheel Coolant - Each
19.80 gal (74.94 l)
Windshield Washer
1.50 gal (5.68 l)
Standards
Caterpillar 637G Scraper Standards specifications
Brakes
Meets ISO
Cab
Meets ANSI, SAE
Rops/Fops
Meets SAE, ISO
Steering
Caterpillar 637G Scraper Steering specifications
Hydraulic Output
100.00 gpm (378.50 lpm)
Steering Angle - Left
85 degrees
Steering Angle - Right
90 degrees
Width - 180 Degrees Turn
40.00 ft (12.19 m)
Width - 180 Degrees Turn - Right
40.10 ft (12.22 m)
Tractor Engine
Caterpillar 637G Scraper Tractor Engine specifications
Bore
5.40 in (13.72 cm)
Displacement
1,099.00 cu in (18,009.42 cu cm)
Flywheel Power - Tractor/Scraper
336 kW (450 hp) / 186 kW (249 hp)
Gross Power
515.00 hp (384.04 kw)
Gross Power - Gears 1-2
480.00 hp (357.94 kw)
Gross Power - Gears 3-8
519.00 hp (387.02 kw)
Make
Caterpillar
Net Power - Gears 1-2
450.00 hp (335.57 kw)
Net Power - Gears 3-8
485.00 hp (361.67 kw)
Stroke
6.00 in (15.24 cm)
Transmission
Caterpillar 637G Scraper Transmission specifications
1 Forward
3.40 mph (5.47 kph)
2 Forward
6.20 mph (9.98 kph)
3 Forward
7.60 mph (12.23 kph)
4 Forward
10.30 mph (16.58 kph)
5 Forward
13.80 mph (22.21 kph)
6 Forward
18.70 mph (30.09 kph)
7 Forward
25.20 mph (40.56 kph)
8 Forward
34.10 mph (54.88 kph)
Max Speed Forward
34.10 mph (54.88 kph)
Max Speed Reverse
6.20 mph (9.98 kph)
Number Of Forward Gears
8
Number Of Reverse Gears
1
Reverse
6.2 mile/h
Top Speed - Loaded
33.00 mph (53.11 kph)
Transmission - 637g
Caterpillar 637G Scraper Transmission - 637g specifications
1 Forward
3.40 mph (5.47 kph)
2 Forward
6.20 mph (9.98 kph)
3 Forward
7.60 mph (12.23 kph)
4 Forward
10.30 mph (16.58 kph)
5 Forward
13.80 mph (22.21 kph)
6 Forward
18.70 mph (30.09 kph)
7 Forward
25.20 mph (40.56 kph)
8 Forward
34.10 mph (54.88 kph)
Reverse
6.20 mph (9.98 kph)
Weights
Caterpillar 637G Scraper Weights specifications
Front Axel - Loaded
92,975.00 lbs (42,172.80 kg)
Front Axle - Empty
67700 %
Operating Weight
114,743.90 lbs (52,047.02 kg)
Operating Weight - Empty - Approximate
118,909.00 lbs (53,936.28 kg)
Operating Weight - Loaded - Approximate
194,909.00 lbs (88,409.35 kg)
Rear Axle - Empty
47045 %
Rear Axle - Loaded
96770 %
Total Operating - Empty
114,745.00 lbs (52,047.52 kg)
Total Operating - Loaded
189,745.00 lbs (86,066.99 kg)
Weights - Push-Pull
Caterpillar 637G Scraper Weights - Push-Pull specifications
Front Axle
69,670.00 lbs (31,601.82 kg)
Front Axle - Loaded
98,139.00 lbs (44,515.16 kg)
Rear Axle
48,414.00 lbs (21,960.25 kg)
Rear Axle - Loaded
102,145.00 lbs (46,332.25 kg)
Scraper Shipping
47,601.00 lbs (21,591.48 kg)
Total Operating - Empty
118,084.00 lbs (53,562.07 kg)
Total Operating - Loaded
200,284.00 lbs (90,847.41 kg)
Total Shipping
116,100.00 lbs (52,662.14 kg)
Tractor Shipping
68,499.00 lbs (31,070.66 kg)
Weights - Standard, Tandem
Caterpillar 637G Scraper Weights - Standard, Tandem specifications
Front Axle
67,700.00 lbs (30,708.24 kg)
Front Axle Weight - Loaded
96,503.00 lbs (43,773.08 kg)
Rear Axle
47,044.00 lbs (21,338.83 kg)
Rear Axle - Weight - Loaded
100,441.00 lbs (45,559.33 kg)
Scraper Shipping
46,231.00 lbs (20,970.05 kg)
Total Operating - Empty
114,744.00 lbs (52,047.07 kg)
Total Operating - Loaded
196,944.00 lbs (89,332.41 kg)
Total Shipping
112,760.00 lbs (51,147.14 kg)
Tractor Shipping
66,529.00 lbs (30,177.08 kg)
