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C-Series Mining Trucks3500B Diesel Engines
T H E D E F I N I T I O N O F V A L U E
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Todays mining and construction applications and productivity goals
are more demanding than ever. Caterpillar trucks and machines
equipped w ith Caterpillar engines provide not only unmatched
reliabilit y and performance, but also the advantage of being single
source products designed and built f rom the start to w ork togeth
Improving on a Caterpillar engine isnt easy but neit her is becoming
global leader. Caterpillar achieved and maint ains this st atus by
continually researching new technologies and developing innovative
w ays to deliver better engine performance and customer value.
advanced
Cat 3500B Engine Reliability
5 1 3 0 B 5 2 3 0 9 9 2 D 1 1 R
7 8 9 C 7 9 3 C7 8 5 C7 7 7 D
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How?
Increased reliability
Enhanced protection
and diagnostics
Extended service interval
Lower fuel consumption
Lower cost per ton
H igher horsepower
R educed emissions
Improved response
M ore precise control
m o r e p ro d u c t iv e
3 5 1 2 B
3 5 0 8 B
3 5 1 6 B
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s t r o n g em o r e d e p e n d a b le
Camshafts
By increasing the diameter of the camshafts and streng
the camshaft followers, push rods, and rocker arms, im
torsional stiffness and radial deflection have been achie
lobe profi les have also been adjusted to shorten the du
fuel injection, ensuring injection occurs at the optimal m
Fuel system
The new fuel system design produces higher injection
pressures over a shorter injection duration, which prov
more efficient use of fuel and bett er engine response.
Rear gear train
Increased gear face w idth
reduces stress under
increased pressures.
Air system
Higher efficiency turbochargers more
precisely control airf low in the
combustion chamber, al lowing higher
boost pressures at low er engine rpm.
This improves engine response time.
Combustion system
A new two-piece piston design with an
aluminum skirt and forged steel crown
improves combustion of the air-fuel
mixture in the cylinder. Its deep bowl
crown reduces crevice volume, which
boosts fuel efficiency and lowers
emissions.
1 2
5
4
The 3500B engines
illustrate the Caterpillar
commitment t o continuous
improvement w ith new
advanced component designs.
3
Cat 3500B engines go beyond power; theyresetting new standards in performance, reliability,serviceability, and fuel economy.
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7
6
3
5
2
4
1
Air system
A redesign of the Separate C
AfterCooler (SCAC) provides
enhanced serviceability thro
a reduction in the number of
connections, hoses, and
thermostats. And, by reroutin
hoses and relocating the sur
engine instal lation and remo
much simpler and faster.
i r o n
6
Cylinder block
and heads
Stress-relieved, high tensile
strength cast iron alloy resis
tw isting, f lexing, and stress
cracking even under the
toughest operating condition
7
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s m a r t e r
Advanced Electronics
Engine protection through
electronics
Cat 3500B engines are protected by an advancedengine management system. The Caterpillar
Electronic Control M odule (ECM) is a computer
which monitors engine functions and diagnoses
potential problems, resulting in increased engine
reliability and bette r performance. The ECM
responds to the sensors after interfacing
Caterpillar software and customer supplied
performance parameters.
W orking in conjunction w ith the ECM are
electronic unit injectors which, when signaled by
the ECM , inject fuel. The ECM determines the
optimal injection timing, amount, and duration by
reading sensor feedback and air-fuel ratio maps. The
electronic unit injectors in 3500B engines provide 10to 20 percent higher injection pressure than on other
3500 engines.
The rugged ECM is designed to withstand
extremes in temperature, and is protected from
electronic interference and vibration. Together, the
ECM and electronic unit i njectors provide unmatched
operating precision and efficiency, and ensure peak
engine performance at all times.
Diagnostics
The ECM provides sophisticated di agnostic
capabilities. When a problem is detected, a diagnostic
code is generated and stored in memory. Active
indicating an immediate problem, alert operator
to prevent unexpected downtime. Non-active cindicating an intermittent or already repaired p
are logged and are useful for troubleshooting, l
intermittent problems, and maintenance.
Diagnostic codes are easily accessed thro
the Cat Electronic Technician (ET) service tool o
Caterpillar Vital Information M anagement Syst
(VIM S) display module. M any diagnostic param
may also be retrieved and displayed including:
boost pressure overspeed
fuel f low rate oil pressure
engine rpm overheating
Transm
ission
Speed
Sensor
Boost
Pressure
Sensor
Transm
ission
Tem
perature
Sensor
C a t e r p i l l a r E C M S e n s o r s
O
il
Pressure
Sensor
Coolant
LevelSensor
Coolan
t
Tem
perature
Sensor
Prim
ary
Speed
Sensor
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m o r e p r e c i s e
Engine Management
Overspeed warning
Alarm and m essage
Acceleration delay on start-up
Allow s engine lubrication, reducing w ear
Elevated low idle in cold starts
Enables engine t o reach operating
temperature
Cold mode start capability
Retards timing to reduce peak cylinder
pressure
Air filter restriction
Automatic derate beyond indicated
restriction point
Altitude compensation
Derates power by limiting fuel to prevent
excessive exhaust gas temperatures and
related damage
Fuel use record
Of cumulative consumption
Multi-point oil
pressure sensing
Alarm sounds to prevent r isk ofpiston damage
Ether aid
Injects at start-up when engine coolant
temperature dictates the need
Starter protection
Uses engine speed and key posit ion
to control starter engagement,
preventing damage
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LEDH8400 Print 1998 Caterpillar Inc.
Caterpillar trucks and 3500B engines help meet the most
demanding goals in mining and construction applications.
Continuing innovations and development of high-performance
components and sophisticated electronic controls mean
increased productivity and decreased cost per ton.
Maintaining superior performance requires superior support.
And Caterpillar provides just that. The Caterpillar dealer network
includes more than 1,200 outlets worldwide each fully staffed
with trained technicians and equipped with the latest
technology to keep our customers up and running.
Each local Cat dealer also has instant satellite access to the
most comprehensive parts location system in the world. Our
48-Hour Parts Policy delivers new or remanufactured
Cat parts within two days 24 hours a day, 365 days
a year right where they are needed.
Superior products, superior support, superior results.
Thats the Caterpillar commitment to getting the job done.
C - S E R I E S M I N I N G T R U C K S