Page 1
Engine
Tractor Engine Cat®C18 ACERT™
Net Power 421/447 kW 564/600 hp
Scraper Engine Cat C15 ACERT
Net Power 306/337 kW 410/451 hp
Scraper Bowl
Heaped Capacity 33.6 m
3
44 yd
3
Rated Load 47 200 kg 104,058 lb
657G
Wheel Tractor Scraper
®
®
Page 2
2
657G Wheel Tractor Scraper
Responsible, productive earthmoving machines, built to last.
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.
Auger Arrangement
Provides self-loading capability with
the same wide material appetite as an
open bowl machine. pg. 13
Push-Pull Arrangement (657G)
For maximum production capability,
Caterpillar offers an optional push-pull
arrangement for the 657G, which allows
two push-pull scrapers to act as a selfloading machine. pg. 12
Structures
Superior structural design delivers stateof-the-art ride, capacity, and material
control while assuring the durability
and reliability customers expect from
Caterpillar. pg. 7
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. pg. 6
✔
Power Train – Engine
The C18 and the C15 engines with
ACERT™ Technology works at the
point of combustion to optimize engine
performance. Matched with the torque
converter and power shift transmission,
it provides years of dependable and
efficient service. pg. 4
✔
Page 3
✔ New Feature
3
Customer Support
Caterpillar dealers have the parts and
service capabilities to keep your wheel
tractor-scrapers working. pg. 15
Serviceability
Grouped service points and easy access,
the latest electronic monitoring systems
and rugged Caterpillar components
simplify maintenance and minimize
downtime. pg. 14
✔
Scraper Bowl
Caterpillar®Scraper bowls are designed
for excellent material flow and retention
for fast cycle times and high
productivity. pg. 11
✔
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. pg. 10
✔
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. pg. 8
✔
Page 4
C18 Tractor Engine. The tractor for the
657G is powered by the C18 engine
with ACERT™ Technology. The large
displacement and high torque rise allow
the scraper to cut through tough material.
Matched to the high efficiency torque
converter and electronically controlled
power shift transmission, it will provide
years of dependable service.
C15 Scraper Engine. The 657G is
tandem-powered, adding a Cat C15
engine with ACERT Technology for
the scraper. The C15 gives the 657G
additional power to assist in loading as
well as improve hauling performance.
ACERT™ Technology. Caterpillar
optimizes engine performance while
meeting U.S. EPA Tier 3 and European
Union Stage IIIA regulations. ACERT
Technology reduces emissions during
the combustion process by using
advanced technology in the air and fuel
systems, in conjunction with integrated
electronics. Caterpillar meets emission
regulations at the combustion source
rather than recycling exhaust gases.
Dual Horsepower. The C18 and C15
engines have dual horsepower capability
with the low power setting in torque
converter drive and the high power
setting in direct drive. If the auger
is engaged while the machine is in
torque converter drive, the machine
automatically goes to the high
power setting.
Electronic unit injector
Mechanical Electronic Unit Injection
(MEUI). The MEUI system with variable
shaped injection patterns provides for
optimum combustion based on altitude
and temperature. The Cat MEUI fuel
system is a highly evolved fuel system
with a proven record of reliability in
the field. The system combines the
technical advancement of an electronic
control system with the simplicity of
direct mechanically controlled unit fuel
injection pressure. These features allow
the C18 and C15 to completely control
injection timing, duration and pressure.
Electronic Control Module. The ECM
responds to operator commands and
engine sensor input to optimize engine
and machine performance. This advanced
engine management software controls
and protects the engine at all times
against cold starts, high altitude
operations and air filter plugging
by monitoring:
• injection timing and pressure
• engine cooling fan speed
• ether starting aid
• hydraulic pumps
4
A combination of innovations working at the point of combustion, ACERT™ technology
optimizes engine performance while meeting regulations for off-road applications.
Power Train – Engine
Cat C18 engine with ACERT™ Technology
Page 5
ADEM™ A4 Control Module.
Controls engine rpm by adjusting the
fuel duration, which results in quicker
starts in hot and cold weather, better
fuel economy, better operator response,
and automatic compensation for altitude
and filter plugging.
Reduced Exhaust Smoke.
The ADEM A4 controller reads
electronic sensors to determine the
optimum fuel/air ratio. Fuel is precisely
controlled during cranking, starting and
acceleration to reduce smoke. The Engine
Electronics are faster and more efficient
than mechanically controlling the
governor rack position.
Ether Starting Aid. The ADEM A4
controller activates the ether injection
system during engine cranking to
enhance cold weather starting.
Control Throttle Shifting (CTS).
Automatically synchronizes engine
speed to transmission speed during
shifting to reduce power train stress and
increase component life. In addition it
results in a smoother ride for the operator.
Directional Shift Management.
Regulates engine speed to prevent
damage caused by high-speed
directional changes.
Low Battery Elevated Idle.
The ADEM A4 controller automatically
compensates for low alternator output
at low idle by raising the rpm for
brief intervals to keep the batteries
fully charged.
Altitude Compensation. The system
de-rates fuel delivery as a function of
barometric pressure as sensed by the
system’s atmospheric pressure sensor.
No manual adjustment is required.
Auto deration prevents excessive
combustion temperatures that could
result in component damage.
Diagnostic Capability. Cat®Electronic
Technician (Cat ET) is used to display
real-time pressures, temperatures, fuel
settings and diagnostic messages as
well as a historical information such as
engine over-speeds, overheating, low oil
pressure and air filter restriction events.
Fuel Economy. Electronic controls
optimize the timing setting for varying
load conditions. The ADEM A4
controller matches timing to the load on
the engine, engine rpm and temperature.
Air Filter Restriction. ADEM A4
controller monitors air filter restriction
and sends a warning message to the
Electronic Monitoring System (EMS III)
to alert the operator if the restriction
exceeds the allowable limit.
Automatic Belt Tensioning. Both the
tractor and scraper engines have
automatic belt tensioning rather than
manual tensioning. The number of belts
has been reduced to two on the tractor,
and two on the scraper. Fan drive
bearings both the tractor and scraper
engines with ACERT™ technology
eliminate servicing requirements.
One-Piece Power Block. The jumpstart
receptacle and disconnect switch are
integrated into one-piece power block
that provides better electrical integrity
and serviceability. The disconnect
switch with lockable cover locks out
all power for servicing.
NGMR Engine Cooling System.
The standard radiator for the tractor is
the Next Generation Modular Radiator
(NGMR), which features 9 fins per inch
rather than 33 fins per inch found on
previous models. The increased radiator
fin spacing for both the tractor and the
scraper reduces clogging in severe
applications. Two-piece service doors
improve access to clean out debris.
Scraper Radiator. The scraper also
has an NGMR radiator, which features
9 fins per inch.
Extended Oil Change Interval.
Oil change intervals in both the C18 and
C15 engines can be extended to 500 hours
with the use of S•O•SSManalysis.
5
Page 6
Transmission. Electronically controlled
Caterpillar planetary powershift
transmission with eight forward and
one reverse speed. Tractor gears 1 & 2
operate in converter drive for increased
torque capability during cut and fill
operations. Gears 3-8 operate in directdrive for drive train efficiency during
the haul. All scraper gears operate in
converter drive for increased torque
capability during the cut and fill.
Synchronized Scraper Transmission.
The scraper transmission is electronically
controlled by the tractor transmission,
synchronizing the scraper transmission
gear selection with that of the tractor
transmission. The scraper transmission
cannot be shifted manually. A neutral/run
switch, located in the cab, allows the
operator to disengage the scraper
transmission.
Planetary Design. Provides larger
contact area between gears than
countershaft transmissions for greater
load-carrying capacity.
Transmission Hold. Incorporated into the
joystick controller, Transmission Hold
allows the operator to maintain converter
drive for increased rimpull, or hold the
current gear for enhanced control.
Programmable Top Gear Selection.
Allows the operator to manually set the
top gear (3rd – 8th) available to match
conditions or to match the hauling speed
of the fleet to specific job-site needs.
Retarder. The hydraulic retarder can be
used to slow the ground speed of the
machine when entering the cut or fill
area to allow the transmission to
downshift. It also reduces service brake
wear and enhances machine control.
Differential Control. Electronic differential
lock helps prevent the drive wheels
from spinning in poor underfoot
conditions. The operator engages the
differential lock with a foot control
located in the cab.
Neutral Coast Inhibitor. Prevents the
transmission from shifting into neutral
if the operator selects neutral while
moving. The transmission control will
select the proper gear for the given
engine rpm and ground speed.
Final Drives. Outboard-mounted,
planetary design final drives reduce
torque loads on other power train
components. Large-capacity, doublerow roller bearings and Caterpillar
Duo-Cone®seals deliver exceptional
reliability in the toughest applications.
Independent Brake Systems.
Expanding-shoe type brakes use a
cam-operated design, which is air-applied
and spring released. The secondary
braking system uses independent front
and rear circuits that are automatically
applied if the service air pressure drops
to 380 kPa (55 psi). Audible and visual
action alert indicators inform the operator
when the service air pressure drops to
518 kPa (75 psi).
Parking Brakes. The push-button
operated parking brake features a
spring-applied, air-released mechanism
that operates the service brakes.
Steering. Full hydraulic power steering
provides automotive feel with positive,
modulated flow control for constant
steering response. An optional secondary
steering system is ground-driven and
provides hydraulic power for steering
if needed.
6
Power Train – Transmission
Integrated electronics allow the machine to monitor the entire power train,
reducing component stress and providing a better ride.
Page 7
Cushion Hitch. The electronically
actuated cushion hitch incorporates
a parallelogram-type linkage for
exceptional strength with nitrogen
accumulators to deliver a smooth ride
for enhanced operator comfort.
• cushion hitch lock down control for
positive cutting edge down pressure
when loading or spreading
• controlled oil flow dampens rebound
oscillation
• leveling valve automatically centers
piston in cylinder for all loads
• steel castings are used extensively
to eliminate many welded joints and
increase strength
• double-kingbolt design withstands
high external forces and simplifies
installation and removal
Nitrogen Accumulators. Vertically
mounted hydraulic cylinder transfers
road shocks to nitrogen accumulators.
Nitrogen accumulators absorb and
dampen road shocks, thus reducing the
shocks being transmitted to the operator.
Lockout Switch. An operator-selectable
lockout switch, located on the joystick,
locks the cushion hitch for improved
control of the cutting edge during
loading and dumping.
7
Structures
Superior structural design and construction optimize performance and reliability.
1 Load cylinder
2 Hitch castings
3 Scraper gooseneck
4 Nitrogen accumulators
5 Orifice
6 Oil from tractor hydraulic system
7 Leveling valve
8 Free floating pistons
2
1
5
3
4
4
8
7
8
6
Page 8
Multi-Adjustable Seat. The Cat Comfort
Cloth Seat offers an adjustable seat and
armrests for maximum operator comfort.
• Swivels and locks in four positions
(0º – 10° – 20° – 30º) providing the
optimum operating position in the
cut or on the haul.
• Adjustable 102 mm (4 in) fore/aft
and 203 mm (8 in) vertical height to
accommodate various sized operators.
• Static seat belt is standard.
A retractable non-cinching seat
belt is available as an option.
Seat Suspension. The new standard seat
suspension features a high performance
air shock absorber with a self-contained
air compressor. For operators requiring
additional damping, dual shock absorbers
in the seat suspension are available.
Revised Steering Column. Increases
legroom a full 89 mm (3.5 in), and
reduces knee contact.
Standard Air Conditioning. Standard
air conditioning system with relocated
louvers enhances airflow in the cab.
Storage And Amenities. Convenient
storage location includes space for a
lunch box and first aid kit. The cab also
has a cup holder as well as an ashtray.
Visibility. The redesigned hood has
sloped corners to maximize visibility
while accommodating the low
emissions engine.
The redesigned hood and front shroud
are wider to enclose the air-to-air
aftercooler (ATAAC), ether starting aid,
and lights. The exhaust is located at the
back of the hood for good visibility to
the right side.
Instrument Display Panel. Features a
new quad-gauge layout showing engine
coolant temp, transmission/torque
converter oil temp, fuel level, and system
air pressure. The 657G tachometer can
monitor either front or rear engine
speeds. Once the 657G tractor engine
has been started, the operator can start
the rear engine from inside the cab
using a switch on the instrument panel.
EMS III can display both front and rear
engine information right in the cab.
Logical Control Placement. Placing only
frequently used switches and indicator
lights on the instrument panel, and less
frequently used switches on the overhead
console improves efficiency and
reduces reaching.
8
State-of-the-art productivity and operator comfort.
Operator Station
Page 9
Engine Speed Lock Controller.
Enhances operation during long haul
cycles by allowing the operator to
maintain a desired engine speed, without
maintaining pressure on the throttle.
Simplified Transmission Control.
Simplifies gear selection (1st, 2nd,
Drive and Reverse) and allows
operator-defined top gear control.
Relocating the gear control to the
rear increases operator legroom.
Neutral Lock. The neutral lock thumb
control must be pressed to move the
shifter from neutral. To use the top
gear button, the operator must hold
the yellow button until the gear display
indicates the desired top gear. Releasing
the yellow button sets the top gear.
Grab Handle/Hand Rest. The grab
handle/hand rest located next to joystick
controller helps operators when adjusting
seat swivel, and gives them a place to
rest their hand while on the haul and
return roads.
Single Lever Implement Control.
Simple and easy to operate, the joystick
enhances the productivity of operators
of all skill levels. Requires less force to
control the critical scraper functions and
requires less lever travel.
1) Bowl (forward & back)
2) Ejector (side to side)
3) Apron (thumb rocker switch)
4) Transmission Hold
5) Cushion Hitch
6) Rocker switch (not shown – is on
front of joystick)
• Auger (on/off)
• Push-Pull (bail up/down)
* Standard open bowl does not have
a rocker switch.
9
Joystick Control: positions, switches and buttons
1
(Down)
4
5
3
2 (Forward) 2 (Return)
1 (Up)
Page 10
Simplified System. The electrical
system has been redesigned to utilize
three electronic control modules (ECM)
on the tractor instead of four. The rearpowered scraper now has two ECMs
rather than three.
Air Filter Restrictor Indicator.
ADEM A4 controller monitors air filter
restriction. If the restriction exceeds the
allowable limit, it alerts the operator
by sending a message to the Electronic
Monitoring System (EMS III).
Automatic Ether Injection.
The ADEM A4 controller activates
the ether injection system during engine
cranking to enhance cold weather starting.
Automatic Altitude Compensation.
At high altitudes the system automatically
de-rates fuel delivery as a function of
barometric pressure sensed by the
system’s atmospheric pressure sensor.
Low Battery Elevated Idle.
The ADEM A4 controller automatically
compensates for low alternator output
at low idle by raising the rpm for
brief intervals to keep the batteries
fully charged.
Improved Serviceability. Combined
monitoring systems, easy access
diagnostics and more durable components
make routine maintenance and servicing
simple and fast.
Combined EMS Monitoring.
The Electronic Monitoring System
(EMS III) is designed to monitor
both the tractor and scraper from one
location instead of two. Both the tractor
and powered scraper use the same
controller for parts commonality and
easier servicing.
Easy Access Diagnostics. A variety of
diagnostic codes are accessible through
the EMS main display module, via the
Cat
®
Electronic Technician (Cat ET).
This offers a head start on problem
solving, so with a radio call the service
technician can know which tools,
troubleshooting guides, and possibly
even replacement parts to bring to
the machine.
Greater Reliability. The MEUI system
has fewer moving parts than mechanical
unit injection and requires few
adjustments. The ADEM A4 controller
communicates with the monitoring
system (EMS) to warn the operator
should problems arise, to help avoid
major damage.
Maintenance. MEUI engines have
significantly fewer mechanically
controlled parts to wear or adjust.
These have been replaced by electronic
controls, reducing maintenance costs
and increasing machine availability.
Product Link Ready. Product Link is a
wireless system that allows the customer
to track machine data such as location,
service meter hours as well as machine
health information. The system can
automatically issue alerts when the
machine is operated beyond ownerdefined time and location limits.
Product Link is available as a factory
attachment or it may be installed in the
field in that there is a mounting location
for the module as well as an antenna
on the machine. A wiring breakout is
standard, eliminating the need to splice
into existing wires.
Fuel Economy. Electronic controls
optimize the timing setting for varying
conditions. The ADEM A4 controller
matches timing to the load on the
engine, engine rpm and temperature.
Reduced Exhaust Smoke.
The ADEM A4 controller reads
electronic sensors to determine the
optimum fuel/air ratio. Fuel is precisely
controlled during cranking, starting
and acceleration to reduce smoke.
The engine electronics are faster
and more efficient than mechanically
controlling the governor rack position.
10
Electronic Controls
Integrated electronic controls provide smooth, consistent shifts through the synchronization
of engine and transmission speeds.
Page 11
Redesigned Bowl. The redesigned
bowl minimizes falling material lodging
between the bowl and the draft arm,
resulting in premature wear.
The modifications also provide
better load retention on level ground
or traversing down a grade.
• Low-profile bowl design offers less
resistance to incoming materials.
• Cellular construction adds strength
and dent resistance to bowl sides
and floor.
Bulldozer Ejection System. Cat bulldozer
ejection system offers constant spreading
control with minimal material carry
back. A spill guard helps retain material
and keep it from spilling over onto the
rear of the scraper (standard on tandem
engine scrapers, optional on single
engine open bowl scrapers).
Cutting Edges. May be adjusted
according to job conditions. The stinger
(drop down) position provides good
penetration and efficient flow of material
into the bowl whereas the level cutting
edge is used for finish work or very
high impact conditions.
Caterpillar Ground Engaging Tools
(G.E.T.). A wide variety of Ground
Engaging Tools (GET) options such
as standard, serrated, and abrasion
resistant material (ARM) are available
to optimize scraper loading in various
materials. For example, ARM scraper
cutting edges and router bits will
provide up to five times the wear life
of conventional edges and router bits
in high wear, low impact applications.
Depending on applications, the serrated
cutting edge may be more cost effective
than the integrated tooth cutting edge.
Tandem Engine. Two engines ensure
the power to handle steep grades, and
makes possible all wheel drive to handle
soft, slippery underfoot conditions.
Dual Horsepower. The 657G rear
engine has dual horsepower capability
that results in better performance on
the haul roads.
Material Application. Well suited to
handle a wide variety of material from
clay to shot rock.
11
Scraper Bowl
Designed for optimum loading, material retention and ejection.
Page 12
Push-Pull Attachment. This optional
arrangement concentrates the combined
horsepower of two machines onto one
cutting edge. The push-pull attachment
allows two individual machines to act
as a self-loading system, typically loading
both machines in less than a minute.
Flexible Fleet. This system provides
a more balanced, flexible fleet using
fewer machines and less investment
than comparable self-loading or
push-loading systems.
Hydraulically Actuated Bail. The pushpull arrangement uses a hydraulically
actuated bail and cushioned plate bolted
to the front of the tractor, and a hook
that is attached to the rear of the scraper.
There is an actuator indicator light on
the dash that will turn on when the
trigger is engaged to actuate the
push-pull bail or auger.
12
Push-Pull Arrangement (657G)
Caterpillar offers a self-loading arrangement for the 657G.
Page 13
Versatility. The auger has a wide
material appetite ranging from rock
to free flowing material such as sand.
Auger Mechanism. The auger lifts
material off of the cutting edge and
carries it to the top of the load for true
self-loading capability. Material is
distributed evenly throughout the bowl,
resulting in consistent loads.
Material Handling. The auger actions on
the material produce several benefits:
• wide material appetite, ideal
for landfills
• blends the material to help eliminate
voids in the bowl for consistent
payloads
• conditions material which promotes
compaction in the fill
• reduces dust and noise during loading
Dual Horsepower. Tractor engine
automatically reverts to the higher
setting when the auger motor is engaged.
Slip Limiter Switch. Prevents rear wheel
spin during loading.
Hydraulic System. Single hydraulic
system for entire machine with separate
implement pumps/valves simplifies
maintenance and improves reliability.
Full-flow Circuits. The hydraulic system
features closed-loop, full-flow hydraulic
circuits powered by gear-type and
piston-type pumps.
Apron. Prevents material spillage and
retains fine material far better than an
elevating scraper.
Electro-hydraulic Controls. The 657G
features full electro-hydraulic controls,
which simplify serviceability and
reduce noise by replacing the cab pilot
valves with a single-lever joystick
control. The high efficiency oil filter
provides cleaner oil for the pilot system.
13
Auger Arrangement
Excellent self-loading capability in a wide range of material.
Page 14
Grouped Service Points. Maintenance
and service points for the engine are
grouped on the right-hand side for easy
access. They include the engine air
cleaner, engine oil check and fill, fuel
filters and priming, coolant level sight
glass, window washer bottle, air
conditioning dryer cartridge, ether
starting aid canister, engine oil filter,
fan drive lubrication, and sampling
ports for the engine oil and coolant.
• Spin-on fluid filters for all but the
main hydraulic filter
• Cab wiring harness redesigned and
relocated for better serviceability
Two-Piece Service Doors. The tractor
has a standard two-piece door on the
right side, which allows better access
to service points. The hood is hinged
on the front and has spring struts, so the
hood easily swings open towards the
front of the machine. This allows better
access to those areas located on top of
the engine.
Electronic Monitoring System (EMS III).
Monitors both the tractor and scraper
from one location instead of two.
Both the tractor and powered scraper
use the same controller for parts
commonality and easier servicing.
Electro-Hydraulic Implement Control.
Simplifies serviceability by removing
the cab pilot valve and associated lines,
which also improves reliability and
reduces noise. The high efficiency
oil filter provides cleaner oil for the
pilot system.
Electronic Technician (Cat ET).
The Electronic Technician (Cat ET)
Service Tool is useful in troubleshooting
existing problems or identifying
potential problems by displaying:
• Real-time pressures, temperatures,
fuel settings and diagnostic messages
• Historical data such as engine overspeeds, overheating, low oil pressure
and air filter restriction events
• More detailed information to the
service technician who can access
Cat ET via a laptop computer
Easy Access Diagnostics. A variety of
diagnostic codes are accessible through
the EMS main display module, via the
Cat®Electronic Technician (Cat ET).
This offers a head start on problem
solving, so with a radio call the service
technician can know which tools,
troubleshooting guides, and possibly
even replacement parts to bring to
the machine.
14
Serviceability
Count on Caterpillar for simplified service and the most productive uptime.
Page 15
Product Support. You will find nearly
all parts at our 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 whenever
possible. You receive the same warranty
and reliability as new products at
substantial cost savings.
Machine Selection. Make detailed
comparisons of the machines under
consideration before purchase.
Cat dealers can estimate component
life, preventive maintenance cost,
and the true cost of lost production.
Purchase. Look past initial price.
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 the long run.
Customer Support Agreements.
Cat dealers offer a variety of product
support agreements, and work with
customers to develop a plan that best
meets specific needs. These plans can
cover the entire machine, including
attachments, to help protect the
customer’s investment.
Operation. Improving operating
techniques can boost your profits.
Your Cat dealer has videotapes,
literature and other ideas to help you
increase productivity, and Caterpillar
offers certified operator training classes
to help maximize the return on your
machine investment.
Maintenance Services. Talk to your
dealer about the range of available
maintenance services. Repair option
programs guarantee the cost of repairs
up front. Diagnostic programs such as
S•O•SSMAnalysis and Coolant Sampling
and Technical Analysis help avoid
unscheduled repairs.
Replacement. Repair, rebuild or
replace? Your Cat dealer can help you
evaluate the cost involved so you can
make the right choice.
15
Customer Support
Cat dealer services help you operate longer with lower costs.
Page 16
16
657G Wheel Tractor Scraper specifications
Scraper Bowl
Heaped Capacity 33.6 m
3
44 yd
3
Rated Load 47 200 kg 104,058 lb
Struck Capacity 24.5 m
3
32 yd
3
Depth of Cut – Max. 425 mm 16.7 in
Width of Cut, to Router Bits 3846 mm 12.7 in
Ground Clearance – Max. 545 mm 21.5 in
Cutting Edge – Thickness 22 mm 0.88 in
Hyd. Penetration Force – 657G 542 kN 121,000 lb
Depth of Spread – Max. 680 mm 26.77 in
Apron Opening 2340 mm 92 in
Apron Closure Force 176 kN 39,200 lb
Transmission
1 Forward 5.5 km/h 3.4 mph
2 Forward 10 km/h 6.2 mph
3 Forward 10.9 km/h 6.8 mph
4 Forward 14.8 km/h 9.2 mph
5 Forward 19.8 km/h 12.3 mph
6 Forward 26.9 km/h 16.7 mph
7 Forward 36 km/h 22.4 mph
8 Forward 55.7 km/h 36 mph
Reverse 9.7 km/h 6 mph
Hydraulics
Bowl Cylinder Bore 235 mm 9.25 in
Bowl Cylinder Stoke 950 mm 37.4 in
Apron Cylinder Bore 235 mm 9.25 in
Apron Cylinder Stroke 760 mm 29.92 in
Ejector Cylinder Bore 260 mm 10.24 in
Ejector Cylinder Stroke 1946 mm 76.61 in
Steering Circuit 435 L/min 115 gal/min
Scraper Circuit 579 L/min 153 gal/min
Cushion Hitch Circuit 56 L/min 15 gal/min
Secondary Steering Circuit 430 L/min 113.6 gal/min
Relief Valve – Steering Circuit 13 500 kPa 1,959 psi
Relief Valve – Implement Circuit 13 800 kPa 2,000 psi
Compensator Setting – 20 670 kPa 3,000 psi
Cushion Hitch Circuit
• Steering circuit, scraper implement circuit and cushion hitch
circuit measured at 2,000 rpm.
• Optional secondary steering circuit measured at 24 km/h
(14.9 mph).
Engine
Tractor Engine Cat C18 ACERT™
Scraper Engine Cat C15 ACERT
Tractor Engine
Net Power 421/447 kW 564/600 hp
Gross Power – Gears 1-2 445 kW 596 hp
Gross Power – Gears 3-8 471 kW 632 hp
Net Power – Gears 1-2 421 kW 564 hp
Net Power – Gears 3-8 447 kW 600 hp
Bore 145 mm 5.7 in
Stroke 183 mm 7.2 in
Displacement 18.1 L 1,105 in
3
• Net power advertised is the power available at rated speed
of 1,800 rpm, measured at flywheel when the engine is
equipped with fan, air cleaner, muffler and alternator.
• Gross power and net power ratings apply at 1,800 rpm when
tested under the specified standard conditions for ISO 9249
and EEC 80/1269.
Scraper Engine
Net Power 306/337 kW 410/451 hp
Gross Power – Gears 1-2 326 kW 437 hp
Gross Power – Gears 3-8 356 kW 478 hp
Net Power – Gears 1-2 306 kW 410 hp
Net Power – Gears 3-8 337 kW 451 hp
Bore 137 mm 5.4 in
Stroke 171.5 mm 6.8 in
Displacement 15.2 L 928 in
3
• Net power advertised is the power available at rated speed
of 1,800 rpm, measured at flywheel when the engine is
equipped with fan, air cleaner, muffler and alternator.
• Gross power and net power ratings apply at 1,800 rpm when
tested under the specified standard conditions for ISO 9249
and EEC 80/1269.
Page 17
17
657G Wheel Tractor Scraper specifications
Weights – Push-Pull
Total Shipping 70 395 kg 155,194 lb
Tractor Shipping 42 023 kg 92,644 lb
Scraper Shipping 28 372 kg 62,550 lb
Total Operating – Empty 71 554 kg 157,750 lb
Front Axle 42 715 kg 94,170 lb
Rear Axle 28 839 kg 63,580 lb
Total Operating – Loaded 118 729 kg 261,753 lb
Front Axle – Loaded 60 552 kg 133,494 lb
Rear Axle – Loaded 58 177 kg 128,259 lb
Standards
• Standard Rollover Protective Structure (ROPS) which
meets SAE J320a, SAE J1040 MAY 94, ISO 3471-1986 and
ISO 3471-1994
• Falling Object Protective Structure (FOPS) which meets
SAE J231 JAN 81 and ISO 3449-1992
• Cab meets OSHA and MSHA limits for operator and sound
exposure with doors and windows closed (according to
ANSI/SAE J1166 May 90). The operator sound pressure
level is less than 85 dB(A) when measured per ISO 6394
or 86/662/EEC.
• Standard air conditioning system contains environmentally
friendly R134a refrigerant.
• Brakes meet ISO 3450: 1998
Steering
Width – 180° Turn, Right 13.82 m 45 ft 4 in
Width – 180° Turn, Left 14.73 m 48 ft 4 in
Steering Angle – Right 90°
Steering Angle – Left 85°
• Optional secondary steering system meets SAE J1511
(OCT 90) and ISO 5010 (1992) requirements.
Service Refill Capacities – Tractor
Crankcase 60 L 15.85 gal
Transmission 136 L 36 gal
Differential 138 L 36.5 gal
Final Drive (per side) 23 L 6 gal
Cooling System 144 L 38 gal
Hydraulic Reservoir 310 L 81.9 gal
Wheel Coolant (each) 130 L 34.3 gal
Windshield Washer 6 L 1.5 gal
Service Refill Capacities – Scraper
Fuel Tank – 657G 1597 L 421.9 gal
Crankcase 34 L 8.9 gal
Transmission 133 L 35 gal
Differential 163 L 43 gal
Final Drive (per side) 23 L 6 gal
Wheel Coolant (each) 130 L 34.3 gal
Cooling System 110 L 29 gal
Weights – Standard, tandem
Total Shipping 66 615 kg 146,861 lb
Tractor Shipping 39 969 kg 88,117 lb
Scraper Shipping 26 646 kg 58,745 lb
Total Operating – Empty 67 774 kg 149,417 lb
Front Axle 40 665 kg 89,650 lb
Rear Axle 27 110 kg 59,767 lb
Total Operating – Loaded 114 949 kg 253,420 lb
Front Axle Weight – Loaded 58 624 kg 129,244 lb
Rear Axle Weight – Loaded 56 325 kg 124,176 lb
Page 18
18
657G Wheel Tractor Scraper specifications
Dimensions
All dimensions are approximate.
1 Width – Overall Machine 4344 mm 171.02 in
2 Width – Tractor 3601 mm 141.77 in
3 Width – Rear Tire Center Lines 2633 mm 103.66 in
4 Width – Inside of Bowl 3683 mm 145 in
5 Width – Outside Bowl 3914 mm 154 in
(shipping width)
6 Height – Overall Shipping 4710 mm 185.43 in
7 Height – Top of Cab 3712 mm 146.14 in
8 Ground Clearance, Tractor 645 mm 25.39 in
9 Front of Tractor to Front Axle 3770 mm 148.42 in
10 Axle to Vertical Hitch Pin 608 mm 23.94 in
11 Height – Scraper Blade Max. 680 mm 26.77 in
12 Wheelbase 9956 mm 391.97 in
13 Length – Overall Machine 16 164 mm 636.38 in
14 Rear Axle to Rear of Machine 2438 mm 95.98 in
15 Bail Length – Max. 1836 mm 72.28 in
(push-pull)
▼
▼
▼
▼
▼
2
1
▼
▼
▼
▼
6
7
▼
▼
▼
15
▼
▼
▼
▼
8
▼
9
▼
10
▼
3
▼
▼
11
▼
▼
13
12 14
▼
▼
▼
5
4
▼
▼
Page 19
19
657G Wheel Tractor Scraper specifications
W
eights
(approximate)
Model 657G 657G
Standard Push-pull
Shipping, with ROPS cab and 10% fuel
Tractor 60% 60%
39 969 kg 88,117 lb 42 023 kg 92,644 lb
Scraper 40% 40%
26 646 kg 58,745 lb 28 372 kg 62,550 lb
Total 100% 66 615 kg 146,861 lb 70 395 kg 155,194 lb
Operating empty, with ROPS cab, full fuel tanks and no operator
Front axle 60% 60%
40 665 kg 89,650 lb 42 715 kg 94,170 lb
Rear axle 40% 40%
27 110 kg 59,767 lb 28 839 kg 63,580 lb
Total 100% 67 774 kg 149,417 lb 71 554 kg 157,750 lb
Loaded, based on a rated load of: 47 175 kg 104,003 lb 47 175 kg 104,003 lb
Front axle 51% 51%
58 624 kg 129,244 lb 60 552 kg 133,494 lb
Rear axle 49% 49%
56 325 kg 124,176 lb 58 177 kg 128,259 lb
Total 100% 114 949 kg 253,420 lb 118 729 kg 261,753 lb
*Auger adds approximately 4536 kg (10,000 lb) to total weight.
Page 20
20
657G Wheel Tractor Scraper specifications
Gradeability/Speed/Rimpull
Retarding
To determine gradeability performance: Read from gross
weight down to the percent of total resistance. Total resistance
equals actual percent grade plus 1% for each 9 kg/t (20 lb/ton)
of rolling resistance. From this weight-resistance point, read
horizontally to the curve with the highest obtainable gear, then
down to maximum speed. Usable rimpull will depend upon
traction available and weight on drive wheels.
657G Gross Weight*
37.25R35 Tires
kg x
1000
110
100
90
80
70
60
50
Rimpull
40
30
20
10
0
200 40 60 80 100 120 140
lb x
1000
240
220
200
180
160
140
120
100
500
100 150 200 250 300
EL
1
80
2
60
40
20
0
3
4
5
6
7
8
0 5 mph
0
*at sea level
10 15 20 25 30 35
10 20 30 40 50
Speed
kg x 1000
lb x 1000
40%
35%
30%
25%
20%
15%
10%
5%
60
km/h
Total Resistance
(Grade plus Rolling Resistance)
To determine retarding performance: Read from gross weight
down to the percent effective grade. (Effective grade equals
actual percent grade minus 1% for each 9 kg/t (20 lb/ton) of
rolling resistance). From this weight-effective grade point,
read horizontally to the curve with the highest obtainable
speed range, then down to maximum descent speed the
retarder can properly handle.
657G Retarding*
Gross Weight
15 kg x 10000 30 45 60 75 90 105 120 135
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 lb x 1000
30%35%40%
25%
E
L
3
20%
4
15%
5
10%
Effective Grade
6
7
5%
8
1%
mph0 5 10 15 20 25 30
5 10 15 20 25 30 35 40 45 50
*at sea level
Speed
km/h0
(Grade minus Rolling Resistance)
1—1st Gear Torque Converter Drive
2—2nd Gear Torque Converter Drive
3—3rd Gear Direct Drive
4—4th Gear Direct Drive
5—5th Gear Direct Drive
6—6th Gear Direct Drive
7—7th Gear Direct Drive
8—8th Gear Direct Drive
E—Empty 67 774 kg (149,417 lb)
L—Loaded 114 949 kg (253,420 lb)
3—3rd Gear Direct Drive
4—4th Gear Direct Drive
5—5th Gear Direct Drive
6—6th Gear Direct Drive
7—7th Gear Direct Drive
8—8th Gear Direct Drive
E—Empty 67 774 kg (149,417 lb)
L—Loaded 114 949 kg (253,420 lb)
Page 21
21
657G Wheel Tractor Scraper specifications
Standard Equipment
Standard equipment may vary. Consult your Caterpillar dealer for details.
OPERATOR ENVIRONMENT
Air conditioner (includes heater and defroster)
Automotive style fuse panel w/fuse puller
Cigarette lighter and ashtray
Coat hook
Cup holder
Diagnostic connection port (12V)
Dome courtesy light
Engine speed lock
Gauge group
Air pressure
Converter/retarder temperature
Electronic Monitoring System (EMS III)
Engine coolant temperature
Actual transmission gear indicator
Fuel
Speedometer
Tachometer
Transmission gear indicator
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
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
Directional signals
Hazard lights
Headlights, halogen with dimmer
Floodlight, cutting edge
Lighting System – Scraper
Directional signals
Hazard lights
Stop/tail
Starting receptacle – tractor and scraper engines
Page 22
22
657G Wheel Tractor Scraper specifications
Standard Equipment
Standard equipment may vary. Consult your Caterpillar dealer for details.
OTHER STANDARD EQUIPMENT
Tractor
Air dryer
Auto ether aid
Cushion hitch
Extended Life Coolant, –36° C (–33° F)
Fast oil change
Fenders
Guard, bottom
Guard, crankcase
Hydraulic retarder
Locks, vandalism protection
Product Link Ready
Tires, 40.5/75 R39 radial
Tow pins – front and rear
Scraper
Extended Life Coolant, –36° C (–33° F)
Engine coolant heater
Fuel system, fast fill (meets EEC regulations)
Fast oil change
Fenders
Hydraulic retarder
Locks, vandalism protection
Overflow guard
Tires, 40.5/75 R39 radial
POWER TRAIN
Tractor
Engine
Cat C18, ACERT™ Technology
6-cylinder, turbocharged diesel
Mechanically-actuated Electronic Unit Injection (MEUI)
Air cleaner, dry-type with pre-cleaner
Electric start, 24V
Fan, suction
Radiator, NGMR (9 fins per inch)
Ground level engine shutdown
Guard, crankcase
Muffler
Starting aid, ether
Braking system
Parking/primary/secondary/hydraulic retarder
Shields – brake
Transmission
8-speed automatic powershift with electronic control
Control throttle shifting
Differential lock-up
Downshift inhibitor
Neutral coast inhibitor
Programmable top-gear selection
Transmission hold
Scraper
Engine
Cat C15, ACERT Technology
6-cylinder, turbocharged diesel
Mechanically-actuated Electronic Unit Injection (MEUI)
Electric start from the cab, 24V
Fan, suction
Radiator, NGMR (9 fins per inch)
Ground level engine shutdown
Muffler
Starting aid, ether
Thermo-shield, laminated
Braking system
Parking/primary/secondary/hydraulic retarder
Shields – brake
Transmission
8-speed automatic power shift with electronic control
Page 23
23
657G Wheel Tractor Scraper specifications
Optional Equipment
Optional equipment may vary. Consult your Caterpillar dealer for details.
Fan, defroster
Lock, steering
Push-pull arrangement w/rear radiator guard
Retractable seat belts
Product Link
Auger
Heater, engine coolant
Lights, side vision
Push block, extended
Push-pull arrangement
Steering, secondary
Extended Life Coolant, –50° C (–58° F)
Page 24
For more complete information on Cat products, dealer services,
and industry solutions, visit us on the web at www.cat.com
© 2008 Caterpillar
All Rights Reserved
Printed in U.S.A.
Materials and specifications are subject to change without notice.
Featured machines in photos may include additional equipment.
See your Caterpillar dealer for available options.
CAT, CATERPILLAR, ACERT, ADEM, Duo-Cone, SAFETY.CAT.COM, their respective logos,
“Caterpillar Yellow” and the POWER EDGE trade dress, as well as corporate and product
identity used herein, are trademarks of Caterpillar and may not be used without permission.
AEHQ5652-01 (12-08)
Replaces AEHQ5652
657G Wheel Tractor Scraper
R
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