
SEBU7844-11
June 2008
Operation and
Maintenance
Manual
3500B Series II and 3500C Marine
Propulsion Engines
TTA1-Up (Engine)
TTB1-Up (Engine)
TTC1-Up (Engine)
S2D1-Up (Engine)
TTD1-Up (Engine)
S2E1-Up (Engine)
TTE1-Up (Engine)
S2F1-Up (Engine)
TTF1-Up (Engine)
B5G1-Up (Engine)
MRG1-Up (Engine)
PAG1-Up (Engine)
TTG1-Up (Engine)
MKH1-Up (Engine)
TTH1-Up (Engine)
S2J1-Up (Engine)
TTJ1-Up (Engine)
S2K1-Up (Engine)
S2L1-Up (Engine)
S2M1-Up (Engine)
S2N1-Up (Engine)
S2S1-Up (Engine)
S2T1-Up (Engine)
E3W1-Up (Engine)
S2W1-Up (Engine)
E3X1-Up (Engine)
S2X1-Up (Engine)
S2Y1-Up (Engine)
SAFETY.CAT.COM

i01658146
Important Safety Information
Most accidents that involve product operation, maintenance and repair are caused by failure to observe
basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous
situations before an accident occurs. A person must be alert to potential hazards. This person should also
have the necessary training, skills and tools to perform these functions properly.
Improper operation, lubrication, maintenance or repair of this product can be dangerous and
could result in injury or death.
Do not operate or perform any lubrication, maintenance or repair on this product, until you have
read and understood the operation, lubrication, maintenance and repair information.
Safety precautions and warnings are provided in this manual and on the product. If these hazard warnings
are not heeded, bodily injury or death could occur to you or to other persons.
The hazards are identified by the “Safety Alert Symbol” and followed by a “Signal Word” such as
“DANGER”, “WARNING” or “CAUTION”. The Safety Alert “WARNING” label is shown below.
The meaning of this safety alert symbol is as follows:
Attention! Become Alert! Your Safety is Involved.
The message that appears under the warning explains the hazard and can be either written or pictorially
presented.
Operations that may cause product damage are identified by “NOTICE” labels on the product and in
this publication.
Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.
The warnings in this publication and on the product are, therefore, not all inclusive. If a tool,
procedure, work method or operating technique that is not specifically recommended by Caterpillar
is used, you must satisfy yourself that it is safe for you and for others. You should also ensure that
the product will not be damaged or be made unsafe by the operation, lubrication, maintenance or
repair procedures that you choose.
The information, specifications, and illustrations in this publication are on the basis of information that
was available at the time that the publication was written. The specifications, torques, pressures,
measurements, adjustments, illustrations, and other items can change at any time. These changes can
affect the service that is given to the product. Obtain the complete and most current information before you
start any job. Caterpillar dealers have the most current information available.
When replacement parts are required for this
product Caterpillar recommends using Caterpil-
lar replacement parts or parts with equivalent
specifications including, but not limited to, phys-
ical dimensions, type, strength and material.
Failure to heed this warning can lead to prema-
ture failures, product damage, personal injury or
death.

SEBU7844-11 3
Table of Contents
Table of Contents
Foreword ................................................................. 4
Safety Section
Safety Messages .................................................... 6
General Hazard Information ................................... 9
Burn Prevention ..................................................... 11
Fire Prevention and Explosion Prevention ............ 12
Crushing Prevention and Cutting Prevention ........ 14
Mounting and Dismounting ................................... 14
Before Starting Engine .......................................... 14
Engine Starting ..................................................... 15
Engine Stopping ................................................... 15
Electrical System .................................................. 15
Engine Electronics ................................................ 16
Product Information Section
Model Views and Specifications ........................... 18
Product Identification Information ........................ 21
Operation Section
Lifting and Storage ................................................ 23
Gauges and Indicators .......................................... 27
Features and Controls .......................................... 30
Engine Starting ..................................................... 41
Engine Operation .................................................. 46
Engine Stopping ................................................... 48
Cold Weather Operation ....................................... 50
Maintenance Section
Refill Capacities .................................................... 52
Maintenance Recommendations .......................... 56
Maintenance Interval Schedule ............................ 58
Reference Information Section
Engine Ratings ................................................... 126
Engine Performance and Performance Analysis
Report (PAR) ..................................................... 129
Customer Service ............................................... 130
Reference Materials ............................................ 134
Index Section
Index ................................................................... 139

4 SEBU7844-11
Foreword
Foreword
Literature Information
This manual contains safety, operation instructions,
lubrication and maintenance information. This
manual should be stored in or near the engine area
in a literature holder or literature storage area. Read,
study and keep it with the literature and engine
information.
English is the primary language for all Caterpillar
publications. The English used facilitates translation
and consistency in electronic media delivery.
Some photographs or illustrations in this manual
show details or attachments that may be different
from your engine. Guards and covers may have
been removed for illustrative purposes. Continuing
improvement and advancement of product design
may have caused changes to your engine which are
not included in this manual. Whenever a question
arises regarding your engine, or this manual, please
consult with your Caterpillar dealer for the latest
available information.
Safety
This safety section lists basic safety precautions.
In addition, this section identifies hazardous,
warning situations. Read and understand the basic
precautions listed in the safety section before
operating or performing lubrication, maintenance and
repair on this product.
Operation
Operating techniques outlined in this manual are
basic. They assist with developing the skills and
techniques required to operate the engine more
efficiently and economically. Skill and techniques
develop as the operator gains knowledge of the
engine and its capabilities.
The operation section is a reference for operators.
Photographs and illustrations guide the operator
through procedures of inspecting, starting, operating
and stopping the engine. This section also includes a
discussion of electronic diagnostic information.
Maintenance
The maintenance section is a guide to engine care.
The illustrated, step-by-step instructions are grouped
by fuel consumption, service hours and/or calendar
time maintenance intervals. Items in the maintenance
schedule are referenced to detailed instructions that
follow.
Use fuel consumption or service hours to determine
intervals. Calendar intervals shown (daily, annually,
etc.) may be used instead of service meter intervals
if they provide more convenient schedules and
approximate the indicated service meter reading.
Recommended service should be performed at the
appropriate intervals as indicated in the Maintenance
Interval Schedule. The actual operating environment
of the engine also governs the Maintenance Interval
Schedule. Therefore, under extremely severe,
dusty, wet or freezing cold operating conditions,
more frequent lubrication and maintenance than is
specified in the Maintenance Interval Schedule may
be necessary.
The maintenance schedule items are organized for
a preventive maintenance management program. If
the preventive maintenance program is followed, a
periodic tune-up is not required. The implementation
of a preventive maintenance management program
should minimize operating costs through cost
avoidances resulting from reductions in unscheduled
downtime and failures.
Maintenance Intervals
Perform maintenance on items at multiples of the
original requirement. Each level and/or individual
items in each level should be shifted ahead or back
depending upon your specific maintenance practices,
operation and application. We recommend that
the maintenance schedules be reproduced and
displayed near the engine as a convenient reminder.
We also recommend that a maintenance record be
maintained as part of the engine’s permanent record.
See the section in the Operation and Maintenance
Manual, “Maintenance Records” for information
regarding documents that are generally accepted
as proof of maintenance or repair. Your authorized
Caterpillar dealer can assist you in adjusting your
maintenance schedule to meet the needs of your
operating environment.
Overhaul
Major engine overhaul details are not covered in the
Operation and Maintenance Manual except for the
interval and the maintenance items in that interval.
Major repairs are best left to trained personnel or
an authorized Caterpillar dealer. Your Caterpillar
dealer offers a variety of options regarding overhaul
programs. If you experience a major engine failure,
there are also numerous after failure overhaul options
available from your Caterpillar dealer. Consult with
your dealer for information regarding these options.

SEBU7844-11 5
Foreword
California Proposition 65 Warning
Diesel engine exhaust and some of its constituents
are known to the State of California to cause cancer,
birth defects, and other reproductive harm.
Battery posts, terminals and related accessories
contain lead and lead compounds. Wash hands
after handling.

6 SEBU7844-11
Safety Section
Safety Messages
Safety Section
i03110569
Safety Messages
SMCS Code: 1000; 7405
There may be several specific safety messages on
your engine. The exact location and a description of
the safety messages are reviewed in this section.
Please become familiar with all of the safety
messages.
Ensure that all of the safety messages are legible.
Clean the safety messages or replace the safety
messages if the words cannot be read or if the
illustrations are not visible. Use a cloth, water, and
soap for cleaning the safety messages. Do not
use solvents, gasoline, or other harsh chemicals.
Solvents, gasoline, or harsh chemicals could loosen
the adhesive that secures the safety messages. The
safety messages that are loosened could drop off
of the engine.
Replace any safety message that is damaged or
missing. If a safety message is attached to a part
of the engine that is replaced, install a new safety
message on the replacement part. Your Caterpillar
dealer can provide new safety messages.
g01589927
Illustration 1

SEBU7844-11 7
Safety Section
Safety Messages
g01589928
Illustration 2
(1) Universal Warning
g01370904
Illustration 3
Do not operate or work on this equipment unless
you have read and understand the instructions
and warnings in the Operation and Maintenance
Manuals. Failure to follow the instructions or
heed the warnings could result in serious injury
or death.
This warning label is located on the lower right hand
face of the ECM panel.
This warning label is located on the first cylinder on
each side of 8, 12, and 16 cylinder engines.
This warning label is located on the last cylinder on
each side of 12 and 16 cylinder engines.
(2) Hot Surface
g01372256
Illustration 4
Hot parts or hot components can cause burns or
personal injury. Do not allow hot parts or compo-
nents to contact your skin. Use protective clothing
or protective equipment to protect your skin.

8 SEBU7844-11
Safety Section
Safety Messages
This warning label is located on the valve cover for
cylinder 5 and on the valve cover for cylinder 6 on
8 cylinder engines.
This warning label is located on the valve cover for
cylinder 9 and on the valve cover for cylinder 10 on
12 cylinder engines.
This warning label is located on the valve cover for
cylinder 13 and on the valve cover for cylinder 14
on 16 cylinder engines.
(3) Pressurized System
g01371640
Illustration 5
Pressurized system! Hot coolant can cause seri-
ous burns, injury or death. To open the cooling
system filler cap, stop the engine and wait until
the cooling system components are cool. Loosen
the cooling system pressure cap slowly in order to
relieve the pressure. Read and understand the Op-
eration and Maintenance Manual before perform-
ing any cooling system maintenance.
This warning is located on the top of the pressurized
coolant tank.
(4) Pressurized System
g01371640
Illustration 6
Hot Fluid Under Pressure
Do Not Remove Pressure Cap When Hot
Failure to Follow Instructions Could Result in In-
jury or Death
This warning label is located on both sides of the
duplex fuel filter housing.
This warning label is located on both sides of the
duplex oil filter housing.
(5) Hot Fluid Under Pressure
g01061488
Illustration 7

SEBU7844-11 9
Safety Section
General Hazard Information
Filter contains hot pressurized fluid when engine
is running. Follow instructions on control valve to
avoid injury if rapid air movement exists to blow
fluid. Stop engine to avoid fire.
This warning label is located on both sides of the
duplex fuel filter housing.
This warning label is located on both sides of the
duplex oil filter housing.
(6) Shock Hazard
g01372247
Illustration 8
WARNING! Shock/Electrocution Hazard! Read and
understand the instructions and warnings in the
Operation and Maintenance Manual. Failure to fol-
low the instructions or heed the warnings could
cause serious injury or death.
This warning label is located on the lower left hand
face of the ECM panel.
i02566298
General Hazard Information
SMCS Code: 1000; 4450; 7405
g00104545
Illustration 9
Attach a “Do Not Operate” warning tag or a similar
warning tag to the start switch or to the controls
before the engine is serviced or before the engine is
repaired. These warning tags (Special Instruction,
SEHS7332) are available from your Caterpillar
dealer. Attach the warning tags to the engine and to
each operator control station. When it is appropriate,
disconnect the starting controls.
Do not allow unauthorized personnel on the engine,
or around the engine when the engine is being
serviced.
Engine exhaust contains products of combustion
which may be harmful to your health. Always start the
engine and operate the engine in a well ventilated
area. If the engine is in an enclosed area, vent the
engine exhaust to the outside.
Cautiously remove the following parts. To help
prevent spraying or splashing of pressurized fluids,
hold a rag over the part that is being removed.
•
Filler caps
•
Grease fittings
•
Pressure taps
•
Breathers
•
Drain plugs
Use caution when cover plates are removed.
Gradually loosen, but do not remove the last two
bolts or nuts that are located at opposite ends of
the cover plate or the device. Before removing the
last two bolts or nuts, pry the cover loose in order to
relieve any spring pressure or other pressure.

10 SEBU7844-11
Safety Section
General Hazard Information
g00702020
Illustration 10
•
Wear a hard hat, protective glasses, and other
protective equipment, as required.
•
When work is performed around an engine that is
operating, wear protective devices for ears in order
to help prevent damage to hearing.
•
Do not wear loose clothing or jewelry that can snag
on controls or on other parts of the engine.
•
Ensure that all protective guards and all covers are
secured in place on the engine.
•
Never put maintenance fluids into glass containers.
Glass containers can break.
•
Use all cleaning solutions with care.
•
Report all necessary repairs.
Unless other instructions are provided, perform
the maintenance under the following conditions:
•
The engine is stopped. Ensure that the engine
cannot be started.
•
Disconnect the batteries when maintenance
is performed or when the electrical system is
serviced. Disconnect the battery ground leads.
Tape the leads in order to help prevent sparks.
•
Do not attempt any repairs that are not understood.
Use the proper tools. Replace any equipment that
is damaged or repair the equipment.
Pressurized Air and Water
Pressurized air and/or water can cause debris
and/or hot water to be blown out. This could result in
personal injury.
When pressurized air and/or pressurized water is
used for cleaning, wear protective clothing, protective
shoes, and eye protection. Eye protection includes
goggles or a protective face shield.
The maximum air pressure for cleaning purposes
must be below 205 kPa (30 psi) when the air nozzle
is deadheaded. The maximum water pressure for
cleaning purposes must be below 275 kPa (40 psi).
Fluid Penetration
g00687600
Illustration 11
Always use a board or cardboard when you check
for a leak. Leaking fluid that is under pressure can
penetrate body tissue. Fluid penetration can cause
serious injury and possible death. A pin hole leak can
cause severe injury. If fluid is injected into your skin,
you must get treatment immediately. Seek treatment
from a doctor that is familiar with this type of injury.
Containing Fluid Spillage
Care must be taken in order to ensure that fluids
are contained during performance of inspection,
maintenance, testing, adjusting and repair of the
engine. Prepare to collect the fluid with suitable
containers before opening any compartment or
disassembling any component that contains fluids.
Refer to Special Publication, NENG2500, “Caterpillar
Dealer Service Tools Catalog” for the following items:
•
Tools that are suitable for collecting fluids and
equipment that is suitable for collecting fluids
•
Tools that are suitable for containing fluids and
equipment that is suitable for containing fluids
Obey all local regulations for the disposal of liquids.
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This manual provides comprehensive information for maintaining engines in optimal condition. It covers all aspects of engine repair, including specific adjustments, troubleshooting, diagrams, maintenance, and installation procedures.
Models included in this manual:
- 3512B
- 3516B
- 3512C
- 3516C
- 3500B Series II
- 3500C Engines
This Caterpillar 3500B Series II and 3500C Marine Propulsion Engines Operation and Maintenance Manual is suitable for both professional mechanics and DIY enthusiasts. It is available for direct purchase online and is delivered instantly via a download link for your convenience.