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.
Tractor Engine
| Flywheel Power: Tractor/Scraper |
211/373 kW (283/500 hp) |
| Net Power |
345/373 kW (462/500 hp) |
| Gross Power - Gears 1-2 |
364 kW |
| Gross Power - Gears 3-8 |
392 kW |
| Net Power - Gears 1-2 |
345 kW |
| Net Power - Gears 3-8 |
373 kW |
| Bore |
145 mm |
| Stroke |
183 mm |
| Displacement |
18.1 L |
Scraper Bowl
| Scraper Capacity: Heaped |
26 m3 |
| Rated Load |
37285 kg |
| Capacity Struck |
18.3 m3 |
| Depth of Cut - max. |
437 mm |
| Width of Cut, to Router Bits |
3512 mm |
| Ground Clearance - max. |
545 mm |
| Cutting Edge - thickness |
28 mm |
| Hyd. Penetration Force - 637G |
360 kN |
| Depth of Spread - max. |
480 mm |
| Apron Opening |
2007 mm |
| Apron Closure Force |
170 kN |
Transmission
| Top Speed (Loaded) |
54.9 km/h |
| 1 Forward |
5.5 km/h |
| 2 Forward |
10 km/h |
| 3 Forward |
12.2 km/h |
| 4 Forward |
16.6 km/h |
| 5 Forward |
22.2 km/h |
| 6 Forward |
30.1 km/h |
| 7 Forward |
40.6 km/h |
| 8 Forward |
54.9 km/h |
| Reverse |
9.9 km/h |
Engine
| Tractor Engine |
C18 ACERT |
| Scraper Engine |
C9 ACERT |
Scraper Engine
| Net Power |
198/211 kW (266/283 hp) |
| Gross Power - Gear 1 |
213 kW |
| Gross Power - Gears 2-4 |
226 kW |
| Net Power - Gear 1 |
198 kW |
| Net Power - Gears 2-4 |
211 kW |
| Bore |
112 mm |
| Stroke |
149 mm |
| Displacement |
8.8 L |
Weights - Standard, tandem
| Total Shipping |
51147 kg |
| Tractor Shipping |
30177 kg |
| Scraper Shipping |
20970 kg |
| Total Operating - empty |
52047 kg |
| Total Operating - loaded |
89332 kg |
| Front Axle Weight - loaded |
43773 kg |
| Rear Axle Weight - loaded |
45559 kg |
Weights - Push-Pull
| Total Shipping |
52662 kg |
| Tractor Shipping |
31071 kg |
| Scraper Shipping |
21591 kg |
| Total Operating - empty |
53562 kg |
| Front Axle |
31602 kg |
| Rear Axle |
21960 kg |
| Total Operating - loaded |
90874 kg |
| Front Axle - loaded |
44515 kg |
| Rear Axle (Loaded) |
46332 kg |
Dimensions
| Width – Overall Machine |
3938 mm |
| Width – Tractor |
3481 mm |
| Width - rear tire center lines |
2464 mm |
| Width – Inside of Bowl |
3405 mm |
| Width – Outside Rear Tires |
3636 mm |
| Width - outside bowl (shipping width) |
3914 mm |
| Height – Overall Shipping |
4286 mm |
| Height – Top of Cab |
3715 mm |
| Ground Clearance – Tractor |
665 mm |
| Front of Tractor to Front Axle |
3359 mm |
| Axle to Vertical Hitch Pin |
548 mm |
| Height – Scraper Blade Maximum |
545 mm |
| Wheelbase |
8769 mm |
| Length - overall machine |
14565 mm |
| Rear Axle to Rear of Machine |
2437 mm |
| Bail Length - max. (push-pull) |
4960 mm |
| Extended Push Block (push-pull) |
2744 mm |
Service Refill Capacities – Scraper
| Fuel Tank - 637G |
1268 L |
| Crankcase |
30 L |
| Transmission |
72 L |
| Differential |
12 L |
| Final Drive (per side) |
19 L |
| Wheel Coolant (each) |
75 L |
| Cooling System |
76 L |
Service Refill Capacities – Tractor
| Crankcase |
45 L |
| Fuel Tank - 637G |
1268 L |
| Transmission |
110 L |
| Differential |
148 L |
| Final Drive (per side) |
23 L |
| Cooling System |
110 L |
| Hydraulic Reservoir |
190 L |
| Wheel Coolant (each) |
75 L |
| Windshield Washer |
6 L |
Steering
| Width - 180° Turn |
12.2 m |
| Width - 180° Turn, right |
12.2 m |
| Steering Angle – Right |
90° |
| Steering Angle – Left |
85° |
| Hydraulic Output |
379 L/min |
Hydraulics
| Bowl Cylinder Bore |
184 mm |
| Bowl Cylinder Stroke |
873 mm |
| Apron Cylinder Bore |
210 mm |
| Apron Cylinder Stroke |
727 mm |
| Ejector Cylinder Bore |
210 mm |
| Ejector Cylinder Stroke |
1880 mm |
| Steering Circuit |
379 L/min |
| Scraper Circuit |
344 L/min |
| Cushion Hitch Circuit |
34.5 L/min |
| Secondary Steering Circuit |
379 L/min |
| Relief Valve - Steering Circuit |
13700 kPa |
| Relief Valve - Implement Circuit |
14000 kPa |
| Compensator Setting - Cushion Hitch Circuit |
16000 kPa |
Transmission - 637G
| 1 Forward |
5.5 km/h |
| 2 Forward |
10 km/h |
| 3 Forward |
12.2 km/h |
| 4 Forward |
16.6 km/h |
| 5 Forward |
22.2 km/h |
| 6 Forward |
30.1 km/h |
| 7 Forward |
40.6 km/h |
| 8 Forward |
54.9 km/h |
| Reverse |
9.9 km/h |
Power Train – Engine
The C18 and C9 engines with ACERT™ Technology work at the point of combustion to optimize engine performance and minimize exhaust emissions. Matched with the torque converter and power shift transmission, they provide years of dependable and efficient service.
Power Train – Transmission
Electronic controls switch from converter drive to direct drive based on gear selection, maximizing efficiency and power application. Tractor and scraper engines are synchronized for smooth operation and longer service life.
Structures
Superior structural design delivers stateof- the-art ride, capacity, and material control while assuring the durability and reliability customers expect from Caterpillar.
Operator Station
Convenient control placement and a comfortable work environment are keys to high productivity. Features include electro-hydraulic controls, an available air seat suspension and advanced instrumentation.
Electronic Controls
The electronic controls respond to operator commands and input from on-board sensors to optimize machine performance. In addition, the electronic controls provide advanced diagnostic capabilities that result in better machine availability.
Scraper Bowl
Caterpillar® Scraper bowls are designed for excellent material flow and retention for fast cycle times and high productivity.
Push-Pull Arrangement
For maximum production capability, Caterpillar offers an optional push-pull arrangement for the 637G, which allows two push-pull scrapers to act as a selfloading machine.
Auger Arrangement
Provides self-loading capability with the same wide material appetite as an open bowl machine.
Serviceability
Grouped service points and easy access, the latest electronic monitoring systems and rugged Caterpillar components simplify maintenance and minimize downtime.
Customer Support
Caterpillar dealers have the parts and service capabilities to keep your wheel tractor-scrapers working.
