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Tractor EngineCat C18
Flywheel Power - Tractor/Scraper469kW (629 hp) / 353 kW (473 hp)
Scraper Capacity - Heaped44 yd³ (33.6 m³)
Scraper EngineCat C15
Caterpillar offers Wheel Tractor-Scrapers designed exclusively for your coal stockpiling and retrieval needs. The Caterpillar® 657 Coal Bowl Scrapers can construct and maintain your coal stockpiles, as well as haul loads to your inlet supply system to meet the burn requirements of the plant.


Tractor EngineCat C18
Flywheel Power - Tractor/Scraper469kW (629 hp) / 353 kW (473 hp)
Scraper Capacity - Heaped44 yd³ (33.6 m³)
Scraper EngineCat C15
Top Speed - Loaded33 mile/h (56.1 km/h)
Net Power469 kW/637 hp
Net Power353 kW/447 hp
Rated Load104058 lb (47200 kg)
Gross Power (SAE J1995)637 HP (475 kW)
Gross Power (SAE J1995)481 HP (359 kW)
Net Power (ISO 14396)637 HP (469 kW)
Net Power (ISO 14396)480 HP (353 kW)
Net Power (SAE J1349/ISO 9249)592 HP (436 kW)
Net Power (SAE J1349/ISO 9249)452 HP (333 kW)
Total Shipping160505 lb (72804 kg)
Tractor Shipping93635 lb (42472 kg)
Scraper Shipping64068 lb (29061 kg)
Total Operating - Empty164244 lb (74500 kg)
Front Axle93842 lb (42566 kg)
Rear Axle66663 lb (30238 kg)
Total Operating - Loaded268302 lb (121700 kg)
Front Axle - Loaded134165 lb (60856 kg)
Rear Axle - Loaded130340 lb (59121 kg)
Width - Overall Machine14.3 ft (4.36 m)
Width - Tractor12.3 ft (3.75 m)
Width - Rear Tire Center Lines9.21 ft (2.81 m)
Width - Inside of Bowl12.07 ft (3.68 m)
Width - Outside Bowl - Shipping Width12.98 ft (3.93 m)
Height - Overall Shipping15.29 ft (4.66 m)
Height - Top of Cab12.86 ft (3.92 m)
Ground Clearance - Tractor2.3 ft (0.7 m)
Front of Tractor to Front Axle14.93 ft (4.55 m)
Axle to Vertical Hitch Pin1.8 ft (0.55 m)
Height - Scraper Blade Maximum2.17 ft (0.66 m)
Wheel Base32.68 ft (9.96 m)
Length - Overall Machine58.96 ft (17.97 m)
Rear Axle - Rear of Machine8.07 ft (2.46 m)
Capacity - Struck32 yd³ (24.5 m³)
Depth of Cut - Maximum16.4 in (417 mm)
Width - Cut - To Router Bits12.5 ft (3.8 m)
Ground Clearance - Maximum2.3 ft (0.7 m)
Hyd. Penetration Force - 657G121000 lb (542 kN)
Depth of Spread - Maximum26 in (660 mm)
Apron Opening92 in (2337 mm)
Apron Closure Force39200 lb (176 kN)
Bore5.7 in (145 mm)
Bore5.4 in (137.2 mm)
Stroke7.2 in (183 mm)
Stroke6.75 in (171.5 mm)
Displacement1105 in³ (18.1 l)
Displacement928 in³ (15.2 l)
1 Forward3.5 mile/h (5.7 km/h)
2 Forward6.5 mile/h (10.5 km/h)
3 Forward7.8 mile/h (12.5 km/h)
4 Forward10.6 mile/h (17 km/h)
5 Forward14.2 mile/h (22.8 km/h)
6 Forward19.2 mile/h (30.9 km/h)
7 Forward25.7 mile/h (41.4 km/h)
8 Forward34.9 mile/h (56.1 km/h)
Reverse6.7 mile/h (10.8 km/h)
Width - 180° Turn - Right45.4 ft (13.85 m)
Width - 180° Turn - Left47.57 ft (14.5 m)
Steering Angle - Right90
Steering Angle - Left85
Crankcase13.7 gal (US) (38 l)
Transmission35.9 gal (US) (136 l)
Differential36 gal (US) (136 l)
Final Drive - Each6 gal (US) (29.5 l)
Cooling System23.4 gal (US) (88.6 l)
Hydraulic Reservoir39.6 gal (US) (150 l)
Windshield Washer0.5 gal (US) (5 l)
Bowl Cylinder Bore7.08 in (180 mm)
Bowl Cylinder Stroke37.4 in (950 mm)
Apron Cylinder Bore7.08 in (180 mm)
Apron Cylinder Stroke29.92 in (759.5 mm)
Steering Circuit (@ High Idle)76.08 gal/min (288 l/min)
Cushion Hitch Circuit19.54 gal/min (74 l/min)
Secondary Steering Circuit14.52 gal/hr (55 l/hr)
Relief Valve - Steering Circuit1959 psi (13500 kPa)
Relief Valve - Implement Circuit1999 psi (13780 kPa)
Compensator Settings - Cushion Hitch Circuit3002 psi (20700 kPa)
Fuel Tank - 657G430 gal (US) (1628 l)
Crankcase8.9 gal (US) (34 l)
Transmission31.9 gal (US) (121 l)
Differential44 gal (US) (168 l)
Final Drive - Each7.8 gal (US) (30 l)
Cooling System16.6 gal (US) (63.2 l)

Benefits and Features

Purpose-Built Coal Bowl

• Large capacity coal bowl scrapers are longer and higher than
standard open bowl scrapers.
• Purpose-built coal bowl dual engine scrapers deliver faster cycle
times with maximum payloads.
• High ground speed provides the ability to manage stockpiles.
• Machine is designed for loading, hauling, and compaction for
complete functionality.
• Work effectively in poor underfoot conditions and climb slippery
piles and loose coal with all-wheel drive (AWD).
• Coal bowl scrapers provide effective coal compaction, which
reduces the risk of spontaneous combustion in coal stockpiles by
eliminating the air spaces.
• Specialty coal bowl scrapers are optimized for maximum machine
productivity and efficiency.

Be More Productive

• Improve productivity by up to 6%.
• Move more material with Advanced Productivity Electronic Control
System (APECS), which allows the machine to better utilize engine
power and torque.
• Set the desired top speed with Ground Speed Control, and the
machine will find the gear that works best for the engine and the
transmission, providing a lower fuel burn.
• The Machine Speed Limit feature replaces Top Gear Selection.
• Auto-Stall assists in quickly bringing the transmission to an
operating temperature at start-up when working in colder climates.

Work in Comfort

• Steer with less effort with the newly designed high-pressure
steering system.
• Reduce up to 14 individual operator commands per cycle with
Sequence Assist (optional attachment).
• Enjoy interior improvements and a more ergonomic work
environment with a 21% larger cab than the 657 G-Series cabs.
• Intuitive, ergonomic controls with multifunction display keep
operators focused on their work.
• Maintain desired cab temperature with automatic temperature

Designed for Safety

• Get in and out of the cab easier with the new powered access
ladder system (optional attachment).
• Enhance the operator’s awareness of site surroundings with the
optional Work Area Vision System (WAVS).
• Centralized service locations allow for easier and safer
• Seat belt indicator provides visual and audible alerts when the seat
belt is not in use.

Easy to Operate

• Cat Advance Ride Management (ARM) seat suspension reduces end
stroke movement of the load cylinder for a smoother ride.
• Engine overspeed protection will automatically engage with no
operator input when the machine is in eighth gear. The machine
will assist in slowing the machine speed by canceling the throttle
command and engaging the engine compression brake.

Integrated Cat Technologies

• Access information anytime, anywhere with Vision Link®– use it to make informed decisions that boost productivity, lower costs, simplify maintenance, and improve safety and security on your
• Product Link™collects machine data that can be viewed online through web and mobile applications.

Execute Efficiency

• The Cat C18 tractor and C15 scraper engines meet U.S. EPA Tier 4 Final or EU Stage V emission standards, contributing to lower fuel consumption.
• Using draft-arm overflow guards diverts material away from the bowl, preventing material from getting caught between the draft arms and the bowl sides.
• The new tractor hydraulic demand fan helps lower fuel consumption.

Standard Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Alarm, backup
  • Alternator, 115 amp - tractor engine
  • Alternator, 65 amp - scraper engine
  • Batteries Tractor (4), 12V Maintenance Free, High Output
  • Batteries Scraper (4), 12V Maintenance Free, High Output
  • Electrical System, 24V
  • Lighting System - Tractor
  • Lighting System - Scraper
  • Starting Receptacle - tractor and scraper engines
  • Air Conditioner (includes heater and defroster)
  • Automotive style fuse panel with fuse puller
  • Lunch box platform with holding strap
  • Coat Hook
  • Cup holder
  • Diagnostic Connection Port (12V)
  • Dome Courtesy Light
  • Engine speed lock
  • Fan defroster
  • Gauge Group
  • Horn
  • Implement Control Joystick
  • Rearview Mirrors
  • Radio Ready
  • 2 radio openings, speakers, and 5-amp converter
  • ROPS Cab with Sound Suppression and Pressurization
  • Static Seatbelt, 2 piece
  • Scraper Engine Controls
  • Seat, Air Suspension, Cat Advanced Ride Management
  • Steering Wheel - tilt and telescoping
  • Storage Compartment
  • Transmission Hold
  • Windows - sliding side
  • Windshield - laminated glass
  • Windshield Wiper/Washer - front and rear
  • Wrist Rest/Grab Handle
  • Tractor
  • Scraper