657G

Overview

Quick loading, high travel speeds and the ability to load and dump on the run yield fast cycle times, allowing Cat® Wheel Tractor-Scrapers to deliver a high rate of productivity.
Tractor EngineCat® C18 ACERT™
Scraper EngineCat C15 ACERT
Flywheel Power - Tractor/Scraper447 kW (600 hp) / 337 kW (451 hp)
Net Power421/447 kW 564/600 hp
Gross Power - Gears 1-2445 kW596 HP
Gross Power - Gears 3-8471 kW632 HP
Net Power - Gears 1-2421 kW564 HP
Net Power - Gears 3-8447 kW600 HP
Bore145 mm5.7 in
Stroke183 mm7.2 in
Displacement18.1 l1105 in³
Net Power306/337 kW 410/451 hp
Gross Power - Gears 1-2326 kW437 HP
Gross Power - Gears 3-8356 kW478 HP
Net Power - Gears 1-2306 kW410 HP
Net Power - Gears 3-8337 kW451 HP
Bore140 mm5.5 in
Stroke165 mm6.5 in
Displacement15.2 l928 in³
Scraper Capacity - Heaped33.6 m³44 yd³
Rated Load47174 kg104000 lb
Capacity - Struck24.5 m³32 yd³
Depth of Cut - Maximum440 mm17 in
Width - Cut - To Router Bits3846 mm12.7 in
Ground Clearance - Maximum580 mm23 in
Cutting Edge Thickness45 mm1.8 in
Hyd. Penetration Force - 657G542 kN121000 lb
Depth of Spread - Maximum660 mm26 in
Apron Opening2337 mm92 in
Apron Closure Force176 kN39200 lb
Top Speed - Loaded55.7 km/h33 mile/h
1 Forward5.6 km/h3.5 mile/h
2 Forward10.2 km/h6.3 mile/h
3 Forward12.5 km/h7.8 mile/h
4 Forward17 km/h10.6 mile/h
5 Forward22.7 km/h14.1 mile/h
6 Forward30.6 km/h19 mile/h
7 Forward41.2 km/h25.6 mile/h
8 Forward55.7 km/h34.6 mile/h
Reverse9.8 km/h6.1 mile/h
Bowl Cylinder Bore235 mm9.25 in
Bowl Cylinder Stroke950 mm37.4 in
Apron Cylinder Bore235 mm9.25 in
Apron Cylinder Stroke760 mm29.92 in
Ejector Cylinder Bore260 mm10.24 in
Ejector Cylinder Stroke1946 mm76.61 in
Steering Circuit378 l/min99.9 gal/min
Scraper Circuit579 l/min153 gal/min
Cushion Hitch Circuit48 l/min12.7 gal/min
Secondary Steering Circuit243 l/min64.2 gal/min
Relief Valve - Steering Circuit13500 kPa1959 psi
Relief Valve - Implement Circuit13780 kPa1999 psi
Compensator Settings - Cushion Hitch Circuit20700 kPa3002 psi
Width - 180° Turn - Right13.6 m44.62 ft
Width - 180° Turn - Left14.5 m47.57 ft
Steering Angle - Right90°
Steering Angle - Left85°
Crankcase64 l17 gal (US)
Transmission136 l36 gal (US)
Differential136 l36 gal (US)
Final Drive - Each23 l6 gal (US)
Cooling System125 l33 gal (US)
Hydraulic Reservoir303 l80 gal (US)
Wheel Coolant - Each130 l34.3 gal (US)
Windshield Washer2 l0.5 gal (US)
Fuel Tank - 657G1597 l421.9 gal (US)
Crankcase38 l10 gal (US)
Transmission121 l32 gal (US)
Differential168 l44 gal (US)
Final Drive - Each30 l7.9 gal (US)
Wheel Coolant - Each130 l34.3 gal (US)
Cooling System89 l24 gal (US)
Width - Overall Machine4344 mm171 in
Width - Tractor3601 mm141.77 in
Width - Rear Tire Center Lines2813 mm110.75 in
Width - Inside of Bowl3683 mm145 in
Width - Outside Bowl - Shipping Width3914 mm154 in
Height - Overall Shipping4710 mm185.4 in
Height - Top of Cab3712 mm146.14 in
Ground Clearance - Tractor645 mm25.39 in
Front of Tractor to Front Axle3770 mm148.4 in
Axle to Vertical Hitch Pin608 mm23.94 in
Height - Scraper Blade Maximum680 mm26.77 in
Wheel Base9956 mm391.97 in
Length - Overall Machine16164 mm636.38 in
Rear Axle - Rear of Machine2438 mm95.98 in
Bail Length - Maximum (Push-Pull)1836 mm72.28 in
Total Shipping67113 kg147959 lb
Tractor Shipping39788 kg87717 lb
Scraper Shipping27325 kg60242 lb
Total Operating - Empty68384 kg150761 lb
Front Axle39881 kg87924 lb
Rear Axle28503 kg62837 lb
Total Operating - Loaded115558 kg254761 lb
Front Axle Weight - Loaded58172 kg128246 lb
Rear Axle - Weight - Loaded57386 kg126515 lb
Total Shipping72804 kg160505 lb
Tractor Shipping42472 kg93635 lb
Scraper Shipping29061 kg64068 lb
Total Operating - Empty72804 kg160505 lb
Front Axle42566 kg93842 lb
Rear Axle30238 kg66663 lb
Total Operating - Loaded119978 kg264505 lb
Front Axle - Loaded60856 kg134165 lb
Rear Axle - Loaded59121 kg130340 lb

657G Standard Equipment

  • ELECTRICAL
    • Alarm, backup
    • Alternator, 80 amp - tractor engine
    • Alternator, 50 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
  • OPERATOR ENVIRONMENT
    • Air Conditioner (includes heater and defroster)
    • Automotive style fuse panel with fuse puller
    • Cigarette Lighter and Ashtray
    • 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
    • Scraper Engine Controls
    • Seat, Air Suspension, Caterpillar Comfort, cloth
    • Steering Wheel - tilt and telescoping
    • Storage Compartment
    • Transmission Hold
    • Windows - sliding side, swing out
    • Windshield - laminated glass
    • Windshield Wiper/Washer - front and rear
    • Wrist Rest/Grab Handle
  • POWER TRAIN
    • Tractor
    • Scraper
  • OTHER STANDARD EQUIPMENT
    • Tractor
    • Scraper

Exterior

Interior

Operator Station

Operator Station

Operator Comfort -
  • Ergonomic layout with plenty of room to work.
  • Fatigue fighting low-effort controls with convenient auto-kickouts and detents
  • Air suspension Cat Comfort Seat adjusts and rotates for more comfortable machine operation
  • HVAC, defroster, radio ready are standard
Productivity -
  • Excellent visibility to bail, cutting edge and bowl
  • Transmission hold maintains gear selection for optimum loading performance
  • Dual throttle pedals for independent front and rear engine control
  • Single joystick control replaces three implement levers in previous models
  • Differential lock improves traction, reducing tire slip, wear, and operating costs
  • Hydraulic retarding for braking on grades
Safety -
  • Hand rails strategically placed for three points of contact
  • Seat adjusts for best visibility and access to controls; integrated seat belt
  • ROPS/FOPS integrated into cab structure
  • Front and rear windshield wipers
  • Optional secondary steering helps maneuver the machine when primary steering is inoperable
  • Four braking systems: primary, secondary, parking and hydraulic retarding (optional)
Instruments -
  • 1) Bowl (up/down), 2) Ejector (forward/back), 3) Thumb rocker switch, apron, 4) Transmission hold, 5) Cushion hitch, Trigger switch (not shown) bail control
  • Simple gauge cluster is easy to read
  • 657G dash can display either front or rear engine data
  • Backlit switches are close at hand
  • Messaging alerts technicians and operator to service needs

Power Train - Engine

Power Train - Engine

ACERT™ Technology -
  • U.S. EPA Tier 3, EU Stage IIIa emissions compliant
  • Controlled combustion using proven systems, components
  • Cross flow cylinder heads for clean air, better circulation
  • Delivers fuel at the right time and pressure
  • Rate shaping manages emissions in the combustion cycle
Cat C18 Engine - Tractor -
  • Excellent power density, load response across the curve
  • High compression ratio improves cold start and performance
  • MEUI fuel injection matches quantity and timing to load
  • Matched to the high efficiency torque converter and electronically controlled power shift transmission, it has the torque rise to power through tough material and provide years of dependable service
Cat C15 Engine - Scraper -
  • Strong block and head - 18:1 compression ratio improves cold start performance
  • Coolant, oil flow design improves heat transfer for durability
  • Articulated two-piece piston with forged steel crown improves thermal stability and strength
  • ADEM A4 ECM cold start strategy protects the engine, reduces white smoke and warm up time
  • Automatic altitude compensation
  • Mechanical Hydraulic Electronic Unit Fuel Injectors (MEUI) improve combustion with precise injection and atomization
Engine Speed Lock - Allows the operator to maintain a given engine speed without using the accelerator pedal.

Power Train - Transmission

Power Train - Transmission

Planetary Powershift Transmission Is Electronically Controlled -
  • Tractor gears 1-2 - converter drive for increased torque, tractor gears 3-8 - direct-drive for drive train efficiency. Scraper gears stay in converter drive for optimum torque
  • Transmission Hold maintains converter drive for max rimpull, or holds current gear for best control
  • Programmable Top Gear manually sets top gear available (3rd-8th) to match conditions or speed
  • Neutral Coast Inhibitor prevents power train overspeeding by synchronizing engine rpm, pump lubrication and drive train speed, preventing under-lubrication
  • Hydraulic Retarder (optional) reduces service brake wear and enhances machine control
Final Drives -
  • Outboard-mounted, planetary design reduces torque loads within the power train
  • Double-row roller bearings and Duo-Cone™ seals assure reliability
  • Differential Lock improves traction in slippery conditions, reducing tire wear
Brake Performance -
  • Wide brake shoes and brake drums improve brake performance and reduce brake and drum wear
  • Separate front and rear circuits. Secondary brakes engage automatically if service pressure drops
  • Parking Brake features a spring-applied, air-released mechanism that operates the service brakes
Torque Converter - Increases rimpull and shortens load times, and eliminates engine stall to efficiently deliver power to the ground and move more dirt.

Electronic Controls

Electronic Controls

Benefits of Electronic Control Modules (ECMs) - ECMs (3 on the tractor, 2 on rear-powered scrapers) offer:
  • Better fuel economy by optimizing engine settings
  • Greater reliability with operator warnings if problems arise
  • Combining tractor and rear powered-scraper monitoring systems, easy access diagnostics, more durable components improves serviceability
  • Reduced exhaust smoke by optimizing the fuel/air ratio during cranking, starting and acceleration
  • Air filter restriction indicator alerts operator if filter exceeds allowable limit
  • Periodically raises engine rpm during low idle to keep the batteries fully charged
Combined Electronic Monitoring System (EMS III) - Monitors both the tractor and scraper status on the 657G; access fault codes from one location. The tractor and powered scraper use the same controller for parts commonality and easier servicing.
Product Link Ready - This wireless system lets the customer track location, service meter hours and machine health information. Can also issue alerts if the machine is operated beyond owner defined time and location limits.
Easy Access Diagnostics Means Faster Problem Solving - Diagnostic codes, via the Electronic Technician (Cat ET), and a radio call can often let the service technician know which tools, manuals, and possibly even replacement parts to bring.

Cushion Hitch

Cushion Hitch

Cushion Hitch - The electronically actuated cushion hitch has a parallelogram-type linkage for exceptional strength. Vertically mounted hydraulic cylinder transfers road shocks to nitrogen accumulators. Nitrogen accumulator absorbs and dampens road shocks, thus preventing these loads from being transmitted to the operator.
  • controlled oil flow dampens rebound oscillation
  • leveling valve applies pressure via an orifice to automatically center piston in the load cylinder
  • steel castings are used to eliminate many welded joints and increase strength
  • double-kingbolt design withstands high external forces and simplifies installation and removal
Lockout Switch - An operator-selectable lockout switch, located on the joystick, locks the cushion hitch down for improved cutting edge control when loading or dumping.

Scraper Bowl

Scraper Bowl

Bowl Design - Excellent productivity, improved draft arm protection, and better load retention. Low profile design offers less resistance to incoming materials, while cellular construction adds strength and dent resistance to bowl sides and floor.
Bulldozer Ejection System - Combines constant spreading control with minimum carryback.
Overflow Guard - An available overflow guard on the scraper bowl helps retain material, and limits spills onto the rear of the scraper.
Push-Loading - Where material types include rocky/abrasive material, or become traction-limited, push loading a 657G with a Cat D10 or D11 will optimize tire wear and productivity.
Cutting Edges and Cat Ground Engaging Tools (GET) - May be adjusted according to job conditions. Smooth and serrated cutting edges with available tip options can be applied to match job site conditions. For most efficient loading, use the thinnest cutting edge that provides satisfactory wear life and impact resistance.
Tandem Engines - Tandem engine machines improve cycle times on grades and in slippery underfoot conditions. Also improves the machine's loading characteristics in tough materials like clay.
Material Appetite - Well suited to handle a wide variety of material from clay to shot rock.

Coal Bowl

Coal Bowl

Bowl Capacity - High-capacity bowls, built longer and taller than earth-moving bowls, allow the 657G to achieve rated load in light weight coal.
Wheel Tractor-Scraper Benefits -
  • High speed, self-loading productivity for stockpile and feeder management
  • Coal pile compaction
  • Bowl capacity 56 m³ (73 yd³) heaped
  • All-wheel drive allows the machine to work in poor underfoot conditions and operate on piles of loose coal

Push-Pull

Push-Pull

Combined Power Increases Production - Push-pull applies the power of four engines to a single cutting edge. The benefit is realized in tough-to-load material and fast loading of both machines. Push-pull applications have the potential to produce the lowest cost per unit volume, and a high rate of production.
Hydraulically Actuated Bail - The push-pull arrangement uses a hydraulically actuated bail and cushioned plate to push, and a hook that is attached to the rear of the scraper to pull.

Serviceability

Serviceability

Engine Service Points -
  • Maintenance/service points grouped on the right side
  • Grouping fluid fill and check points, filters and sampling ports shortens maintenance times
  • Electronic Monitoring System (EMS) provides real-time information to the operator of system warnings
  • Electronic Technician (Cat ET) displays real-time system data to better inform the service technician
Implement Valve Relocation - The implement valve is relocated from the tractor to the top of the scraper draft tube, reducing the number of hoses and tubes crossing over the gooseneck. This reduces potential leak points and improves service access.
Scraper Electrical Harness and One Piece Power Block - The flexible ribbon wiring harness oscillates with the machine, and polyurethane boots offer better protection against the elements. The jumpstart receptacle and disconnect switch are integrated into a one-piece power block, with a lockable cover, for better electrical integrity and serviceability.
Electro-Hydraulic Implement Control Simplifies Serviceability - Removing the cab pilot valve and associated lines improves reliability and reduces noise. The high efficiency electro-hydraulic pilot oil filter provides cleaner oil for the pilot system.

Support

Support

Product Support - You will find nearly all parts at your dealer parts counter. Cat dealers use a world-wide computer network to find in-stock parts to minimize machine down time. Save money with genuine Cat Reman parts. You receive the same warranty and reliability as new products at substantial cost savings.
Operation - Better operating techniques can help maximize your machine investment. Cat dealers have resources to help you increase productivity, and Caterpillar offers certified operator training classes on most machines.
Machine Selection - Compare machines under consideration before purchase. Cat dealers can estimate component life, preventive maintenance cost, and the true cost of lost production.
Purchase - Consider the financing options available as well as day-to-day operating costs. Look at dealer services that can be included in the cost of the machine to yield lower equipment owning and operating costs over time.
Maintenance Services - Talk to your dealer about the range of available maintenance services like S·O·SSM Analysis and Coolant Sampling. Repair option programs guarantee the cost of repairs up front.
Customer Support Agreements - Cat dealers offer a variety of product support agreements that can meet customers' specific needs. These plans can cover the entire machine, including attachments, to help protect your investment.
Replacement - Repair, rebuild or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.

Specifications

Tractor EngineCat® C18 ACERT™
Scraper EngineCat C15 ACERT
Flywheel Power - Tractor/Scraper447 kW (600 hp) / 337 kW (451 hp)
Net Power421/447 kW 564/600 hp
Gross Power - Gears 1-2445 kW596 HP
Gross Power - Gears 3-8471 kW632 HP
Net Power - Gears 1-2421 kW564 HP
Net Power - Gears 3-8447 kW600 HP
Bore145 mm5.7 in
Stroke183 mm7.2 in
Displacement18.1 l1105 in³
Net Power306/337 kW 410/451 hp
Gross Power - Gears 1-2326 kW437 HP
Gross Power - Gears 3-8356 kW478 HP
Net Power - Gears 1-2306 kW410 HP
Net Power - Gears 3-8337 kW451 HP
Bore140 mm5.5 in
Stroke165 mm6.5 in
Displacement15.2 l928 in³
Scraper Capacity - Heaped33.6 m³44 yd³
Rated Load47174 kg104000 lb
Capacity - Struck24.5 m³32 yd³
Depth of Cut - Maximum440 mm17 in
Width - Cut - To Router Bits3846 mm12.7 in
Ground Clearance - Maximum580 mm23 in
Cutting Edge Thickness45 mm1.8 in
Hyd. Penetration Force - 657G542 kN121000 lb
Depth of Spread - Maximum660 mm26 in
Apron Opening2337 mm92 in
Apron Closure Force176 kN39200 lb
Top Speed - Loaded55.7 km/h33 mile/h
1 Forward5.6 km/h3.5 mile/h
2 Forward10.2 km/h6.3 mile/h
3 Forward12.5 km/h7.8 mile/h
4 Forward17 km/h10.6 mile/h
5 Forward22.7 km/h14.1 mile/h
6 Forward30.6 km/h19 mile/h
7 Forward41.2 km/h25.6 mile/h
8 Forward55.7 km/h34.6 mile/h
Reverse9.8 km/h6.1 mile/h
Bowl Cylinder Bore235 mm9.25 in
Bowl Cylinder Stroke950 mm37.4 in
Apron Cylinder Bore235 mm9.25 in
Apron Cylinder Stroke760 mm29.92 in
Ejector Cylinder Bore260 mm10.24 in
Ejector Cylinder Stroke1946 mm76.61 in
Steering Circuit378 l/min99.9 gal/min
Scraper Circuit579 l/min153 gal/min
Cushion Hitch Circuit48 l/min12.7 gal/min
Secondary Steering Circuit243 l/min64.2 gal/min
Relief Valve - Steering Circuit13500 kPa1959 psi
Relief Valve - Implement Circuit13780 kPa1999 psi
Compensator Settings - Cushion Hitch Circuit20700 kPa3002 psi
Width - 180° Turn - Right13.6 m44.62 ft
Width - 180° Turn - Left14.5 m47.57 ft
Steering Angle - Right90°
Steering Angle - Left85°
Crankcase64 l17 gal (US)
Transmission136 l36 gal (US)
Differential136 l36 gal (US)
Final Drive - Each23 l6 gal (US)
Cooling System125 l33 gal (US)
Hydraulic Reservoir303 l80 gal (US)
Wheel Coolant - Each130 l34.3 gal (US)
Windshield Washer2 l0.5 gal (US)
Fuel Tank - 657G1597 l421.9 gal (US)
Crankcase38 l10 gal (US)
Transmission121 l32 gal (US)
Differential168 l44 gal (US)
Final Drive - Each30 l7.9 gal (US)
Wheel Coolant - Each130 l34.3 gal (US)
Cooling System89 l24 gal (US)
Width - Overall Machine4344 mm171 in
Width - Tractor3601 mm141.77 in
Width - Rear Tire Center Lines2813 mm110.75 in
Width - Inside of Bowl3683 mm145 in
Width - Outside Bowl - Shipping Width3914 mm154 in
Height - Overall Shipping4710 mm185.4 in
Height - Top of Cab3712 mm146.14 in
Ground Clearance - Tractor645 mm25.39 in
Front of Tractor to Front Axle3770 mm148.4 in
Axle to Vertical Hitch Pin608 mm23.94 in
Height - Scraper Blade Maximum680 mm26.77 in
Wheel Base9956 mm391.97 in
Length - Overall Machine16164 mm636.38 in
Rear Axle - Rear of Machine2438 mm95.98 in
Bail Length - Maximum (Push-Pull)1836 mm72.28 in
Total Shipping67113 kg147959 lb
Tractor Shipping39788 kg87717 lb
Scraper Shipping27325 kg60242 lb
Total Operating - Empty68384 kg150761 lb
Front Axle39881 kg87924 lb
Rear Axle28503 kg62837 lb
Total Operating - Loaded115558 kg254761 lb
Front Axle Weight - Loaded58172 kg128246 lb
Rear Axle - Weight - Loaded57386 kg126515 lb
Total Shipping72804 kg160505 lb
Tractor Shipping42472 kg93635 lb
Scraper Shipping29061 kg64068 lb
Total Operating - Empty72804 kg160505 lb
Front Axle42566 kg93842 lb
Rear Axle30238 kg66663 lb
Total Operating - Loaded119978 kg264505 lb
Front Axle - Loaded60856 kg134165 lb
Rear Axle - Loaded59121 kg130340 lb

Equipment

657G Standard Equipment

  • ELECTRICAL
    • Alarm, backup
    • Alternator, 80 amp - tractor engine
    • Alternator, 50 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
  • OPERATOR ENVIRONMENT
    • Air Conditioner (includes heater and defroster)
    • Automotive style fuse panel with fuse puller
    • Cigarette Lighter and Ashtray
    • 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
    • Scraper Engine Controls
    • Seat, Air Suspension, Caterpillar Comfort, cloth
    • Steering Wheel - tilt and telescoping
    • Storage Compartment
    • Transmission Hold
    • Windows - sliding side, swing out
    • Windshield - laminated glass
    • Windshield Wiper/Washer - front and rear
    • Wrist Rest/Grab Handle
  • POWER TRAIN
    • Tractor
    • Scraper
  • OTHER STANDARD EQUIPMENT
    • Tractor
    • Scraper

360° Interactive

Exterior

Interior

Benefits and Features

Operator Station

Operator Station

Operator Comfort -
  • Ergonomic layout with plenty of room to work.
  • Fatigue fighting low-effort controls with convenient auto-kickouts and detents
  • Air suspension Cat Comfort Seat adjusts and rotates for more comfortable machine operation
  • HVAC, defroster, radio ready are standard
Productivity -
  • Excellent visibility to bail, cutting edge and bowl
  • Transmission hold maintains gear selection for optimum loading performance
  • Dual throttle pedals for independent front and rear engine control
  • Single joystick control replaces three implement levers in previous models
  • Differential lock improves traction, reducing tire slip, wear, and operating costs
  • Hydraulic retarding for braking on grades
Safety -
  • Hand rails strategically placed for three points of contact
  • Seat adjusts for best visibility and access to controls; integrated seat belt
  • ROPS/FOPS integrated into cab structure
  • Front and rear windshield wipers
  • Optional secondary steering helps maneuver the machine when primary steering is inoperable
  • Four braking systems: primary, secondary, parking and hydraulic retarding (optional)
Instruments -
  • 1) Bowl (up/down), 2) Ejector (forward/back), 3) Thumb rocker switch, apron, 4) Transmission hold, 5) Cushion hitch, Trigger switch (not shown) bail control
  • Simple gauge cluster is easy to read
  • 657G dash can display either front or rear engine data
  • Backlit switches are close at hand
  • Messaging alerts technicians and operator to service needs

Power Train - Engine

Power Train - Engine

ACERT™ Technology -
  • U.S. EPA Tier 3, EU Stage IIIa emissions compliant
  • Controlled combustion using proven systems, components
  • Cross flow cylinder heads for clean air, better circulation
  • Delivers fuel at the right time and pressure
  • Rate shaping manages emissions in the combustion cycle
Cat C18 Engine - Tractor -
  • Excellent power density, load response across the curve
  • High compression ratio improves cold start and performance
  • MEUI fuel injection matches quantity and timing to load
  • Matched to the high efficiency torque converter and electronically controlled power shift transmission, it has the torque rise to power through tough material and provide years of dependable service
Cat C15 Engine - Scraper -
  • Strong block and head - 18:1 compression ratio improves cold start performance
  • Coolant, oil flow design improves heat transfer for durability
  • Articulated two-piece piston with forged steel crown improves thermal stability and strength
  • ADEM A4 ECM cold start strategy protects the engine, reduces white smoke and warm up time
  • Automatic altitude compensation
  • Mechanical Hydraulic Electronic Unit Fuel Injectors (MEUI) improve combustion with precise injection and atomization
Engine Speed Lock - Allows the operator to maintain a given engine speed without using the accelerator pedal.

Power Train - Transmission

Power Train - Transmission

Planetary Powershift Transmission Is Electronically Controlled -
  • Tractor gears 1-2 - converter drive for increased torque, tractor gears 3-8 - direct-drive for drive train efficiency. Scraper gears stay in converter drive for optimum torque
  • Transmission Hold maintains converter drive for max rimpull, or holds current gear for best control
  • Programmable Top Gear manually sets top gear available (3rd-8th) to match conditions or speed
  • Neutral Coast Inhibitor prevents power train overspeeding by synchronizing engine rpm, pump lubrication and drive train speed, preventing under-lubrication
  • Hydraulic Retarder (optional) reduces service brake wear and enhances machine control
Final Drives -
  • Outboard-mounted, planetary design reduces torque loads within the power train
  • Double-row roller bearings and Duo-Cone™ seals assure reliability
  • Differential Lock improves traction in slippery conditions, reducing tire wear
Brake Performance -
  • Wide brake shoes and brake drums improve brake performance and reduce brake and drum wear
  • Separate front and rear circuits. Secondary brakes engage automatically if service pressure drops
  • Parking Brake features a spring-applied, air-released mechanism that operates the service brakes
Torque Converter - Increases rimpull and shortens load times, and eliminates engine stall to efficiently deliver power to the ground and move more dirt.

Electronic Controls

Electronic Controls

Benefits of Electronic Control Modules (ECMs) - ECMs (3 on the tractor, 2 on rear-powered scrapers) offer:
  • Better fuel economy by optimizing engine settings
  • Greater reliability with operator warnings if problems arise
  • Combining tractor and rear powered-scraper monitoring systems, easy access diagnostics, more durable components improves serviceability
  • Reduced exhaust smoke by optimizing the fuel/air ratio during cranking, starting and acceleration
  • Air filter restriction indicator alerts operator if filter exceeds allowable limit
  • Periodically raises engine rpm during low idle to keep the batteries fully charged
Combined Electronic Monitoring System (EMS III) - Monitors both the tractor and scraper status on the 657G; access fault codes from one location. The tractor and powered scraper use the same controller for parts commonality and easier servicing.
Product Link Ready - This wireless system lets the customer track location, service meter hours and machine health information. Can also issue alerts if the machine is operated beyond owner defined time and location limits.
Easy Access Diagnostics Means Faster Problem Solving - Diagnostic codes, via the Electronic Technician (Cat ET), and a radio call can often let the service technician know which tools, manuals, and possibly even replacement parts to bring.

Cushion Hitch

Cushion Hitch

Cushion Hitch - The electronically actuated cushion hitch has a parallelogram-type linkage for exceptional strength. Vertically mounted hydraulic cylinder transfers road shocks to nitrogen accumulators. Nitrogen accumulator absorbs and dampens road shocks, thus preventing these loads from being transmitted to the operator.
  • controlled oil flow dampens rebound oscillation
  • leveling valve applies pressure via an orifice to automatically center piston in the load cylinder
  • steel castings are used to eliminate many welded joints and increase strength
  • double-kingbolt design withstands high external forces and simplifies installation and removal
Lockout Switch - An operator-selectable lockout switch, located on the joystick, locks the cushion hitch down for improved cutting edge control when loading or dumping.

Scraper Bowl

Scraper Bowl

Bowl Design - Excellent productivity, improved draft arm protection, and better load retention. Low profile design offers less resistance to incoming materials, while cellular construction adds strength and dent resistance to bowl sides and floor.
Bulldozer Ejection System - Combines constant spreading control with minimum carryback.
Overflow Guard - An available overflow guard on the scraper bowl helps retain material, and limits spills onto the rear of the scraper.
Push-Loading - Where material types include rocky/abrasive material, or become traction-limited, push loading a 657G with a Cat D10 or D11 will optimize tire wear and productivity.
Cutting Edges and Cat Ground Engaging Tools (GET) - May be adjusted according to job conditions. Smooth and serrated cutting edges with available tip options can be applied to match job site conditions. For most efficient loading, use the thinnest cutting edge that provides satisfactory wear life and impact resistance.
Tandem Engines - Tandem engine machines improve cycle times on grades and in slippery underfoot conditions. Also improves the machine's loading characteristics in tough materials like clay.
Material Appetite - Well suited to handle a wide variety of material from clay to shot rock.

Coal Bowl

Coal Bowl

Bowl Capacity - High-capacity bowls, built longer and taller than earth-moving bowls, allow the 657G to achieve rated load in light weight coal.
Wheel Tractor-Scraper Benefits -
  • High speed, self-loading productivity for stockpile and feeder management
  • Coal pile compaction
  • Bowl capacity 56 m³ (73 yd³) heaped
  • All-wheel drive allows the machine to work in poor underfoot conditions and operate on piles of loose coal

Push-Pull

Push-Pull

Combined Power Increases Production - Push-pull applies the power of four engines to a single cutting edge. The benefit is realized in tough-to-load material and fast loading of both machines. Push-pull applications have the potential to produce the lowest cost per unit volume, and a high rate of production.
Hydraulically Actuated Bail - The push-pull arrangement uses a hydraulically actuated bail and cushioned plate to push, and a hook that is attached to the rear of the scraper to pull.

Serviceability

Serviceability

Engine Service Points -
  • Maintenance/service points grouped on the right side
  • Grouping fluid fill and check points, filters and sampling ports shortens maintenance times
  • Electronic Monitoring System (EMS) provides real-time information to the operator of system warnings
  • Electronic Technician (Cat ET) displays real-time system data to better inform the service technician
Implement Valve Relocation - The implement valve is relocated from the tractor to the top of the scraper draft tube, reducing the number of hoses and tubes crossing over the gooseneck. This reduces potential leak points and improves service access.
Scraper Electrical Harness and One Piece Power Block - The flexible ribbon wiring harness oscillates with the machine, and polyurethane boots offer better protection against the elements. The jumpstart receptacle and disconnect switch are integrated into a one-piece power block, with a lockable cover, for better electrical integrity and serviceability.
Electro-Hydraulic Implement Control Simplifies Serviceability - Removing the cab pilot valve and associated lines improves reliability and reduces noise. The high efficiency electro-hydraulic pilot oil filter provides cleaner oil for the pilot system.

Support

Support

Product Support - You will find nearly all parts at your dealer parts counter. Cat dealers use a world-wide computer network to find in-stock parts to minimize machine down time. Save money with genuine Cat Reman parts. You receive the same warranty and reliability as new products at substantial cost savings.
Operation - Better operating techniques can help maximize your machine investment. Cat dealers have resources to help you increase productivity, and Caterpillar offers certified operator training classes on most machines.
Machine Selection - Compare machines under consideration before purchase. Cat dealers can estimate component life, preventive maintenance cost, and the true cost of lost production.
Purchase - Consider the financing options available as well as day-to-day operating costs. Look at dealer services that can be included in the cost of the machine to yield lower equipment owning and operating costs over time.
Maintenance Services - Talk to your dealer about the range of available maintenance services like S·O·SSM Analysis and Coolant Sampling. Repair option programs guarantee the cost of repairs up front.
Customer Support Agreements - Cat dealers offer a variety of product support agreements that can meet customers' specific needs. These plans can cover the entire machine, including attachments, to help protect your investment.
Replacement - Repair, rebuild or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.

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