Model Family:
3500 Series
Model Variants:
3508, 3512, 3516
Engine Type:
Four-stroke, turbocharged and aftercooled diesel engine
Production Years Covered:
Manuals cover the 3500 Series engines produced through the period documented by the manual set
Configuration:
3508 is a V8, 3512 is a V12, 3516 is a V16
Document Type:
Operators and Service Manual
Delivery:
Instant download after purchase
Target Audience:
Heavy equipment technicians, marine engineers, power generation operators, and owners performing their own maintenance and repair
Intended Use:
Shop reference for scheduled servicing, troubleshooting, disassembly, inspection, and reassembly
Competitive Advantage:
Factory documentation covering the 3500 Series engine family in one set rather than generic aftermarket repair guides
Key Features:
Illustrated procedures, torque specifications, system descriptions, and component identification for the 3508, 3512, and 3516
General Engine Specifications:
Dimensions, clearances, and torques for the 3508, 3512, and 3516
Engine Disassembly and Assembly:
Component removal, inspection, and installation procedures
Cylinder Head and Valve Train:
Valve adjustment, cylinder head inspection, and reconditioning
Cylinder Block and Liners:
Liner removal and installation, block inspection and repair
Crankshaft and Main Bearings:
Crankshaft inspection, bearing clearance measurement, and end play
Pistons and Connecting Rods:
Piston and rod inspection, pin fit, and assembly procedures
Fuel System:
Fuel transfer pump, fuel injection, governor, and adjustment procedures
Air Induction and Exhaust:
Turbocharger, air cleaner, and exhaust system servicing
Cooling System:
Water pump, thermostat, radiator, and coolant flow components
Lubrication System:
Oil pump, oil cooler, filters, and oil pressure checks
Electrical System:
Charging, starting, wiring, and sensor circuits
Governor and Control Linkage:
Governor operation and linkage adjustment
Testing and Adjusting:
System checks, pressure and temperature tests, and troubleshooting
Specifications:
Torque values, clearances, and fluid capacities
Maintenance Schedule:
Periodic inspection and service recommendations
Troubleshooting:
Diagnostic information for common operating faults
Tool and Fixture List:
Special tools referenced for major procedures
Step-by-Step Repair:
Illustrated disassembly, inspection, and assembly sequences
Theory of Operation:
Functional descriptions of major engine systems
Part Identification:
Component naming and arrangement used in the illustrations
Detail Level:
Factory service-level specifications and tolerances
Illustrations:
Line drawings and diagrams as included in the source manual
Parts Information:
Service parts referenced by standard Caterpillar component names
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Models:
3508, 3512, 3516
Design:
Four-stroke cycle diesel, turbocharged and aftercooled
Bore and Stroke:
170 mm bore x 190 mm stroke for the 3500 Series
Number of Cylinders:
8 for the 3508, 12 for the 3512, 16 for the 3516
Displacement:
Approximately 34.5 L (3508), 51.8 L (3512), 69.1 L (3516)
Rating Range:
Output varies by rating and application; confirm the specific engine arrangement number
Aspiration:
Turbocharged with jacket water or air-to-air aftercooling depending on rating
Fuel System:
Direct unit injection with mechanical governor
Governor:
Mechanical or electronic governing depending on arrangement
Rated Speed:
Application dependent; commonly 1200 to 1800 rpm
Emissions:
Baseline mechanical ratings, not electronically controlled aftertreatment engines
Applications:
Marine propulsion, electric power generation, petroleum, and industrial drive
Standard Transmission:
N/A - industrial and marine engines interface with customer-supplied transmissions or driven equipment
Optional Transmission:
N/A - not supplied as part of the engine assembly
Engine to Driven Equipment Coupling:
Flywheel and flywheel housing arrangements vary by engine arrangement number
Speed Control:
Governor control of engine rpm
Starting:
Electric or air starting systems depending on configuration
Rotation:
Standard rotation direction as specified for the given arrangement
Wheelbase:
N/A - not an on-road vehicle
Overall Length:
Varies by engine model and attachment configuration; refer to the dimensional drawings in the manual
Width and Height:
Varies by engine model, exhaust, and accessory arrangement
Mounting:
Engine mounting rails or feet as supplied for the arrangement
Curb Weight:
N/A - engine dry weight depends on model and rating; consult the specification section of the manual
Weight Range:
Dry weight increases from the 3508 to the 3516 by cylinder count and accessories
Shutdown Systems:
Overspeed, low oil pressure, and high coolant temperature protection devices as equipped
Alarms:
Warning alarms for critical engine parameters where installations include them
Guarding:
Rotating components and hot surfaces require installed guards on the equipment
Relief Valves:
Cooling and lubrication systems include pressure relief where applicable
Lockout:
Isolate fuel, starting air or batteries, and electrical supply before disassembly
Lifting:
Use rated lifting eyes or tooling matched to the engine model
Ratings and Crash Information
Crash Test Ratings:
N/A - industrial and marine engine, not rated by automotive crash testing programs
Governor:
Mechanical or electronic governor depending on arrangement
Protection Module:
Optional engine monitoring and shutdown panel on many installations
Sensors:
Oil pressure, coolant temperature, and speed pickups as configured
Infotainment:
N/A - not an automotive entertainment system
Driver Assistance:
N/A - protection and monitoring systems take the place of driver assistance features
Oil and Filter Change:
Per the maintenance schedule in the manual; interval is based on application and fuel sulfur level
Coolant Condition:
Test coolant conditioner and concentration at scheduled intervals
Air Cleaner:
Inspect and service restriction indicator readings
Valve Lash:
Adjust at the intervals stated in the maintenance schedule
Fuel Filters:
Replace at scheduled intervals and after fuel system service
Engine Oil:
Caterpillar diesel engine oil meeting the viscosity and performance requirements for the ambient conditions
Coolant:
Caterpillar coolant or equivalent with the specified conditioner concentration
Fuel:
Diesel fuel meeting the sulfur and cleanliness limits for the installed fuel system
Wear Items:
Injectors, turbochargers, water pumps, and valve train components show wear over long service hours
Diagnostics:
Low power, rough running, and overheating complaints are addressed in the troubleshooting section
Manufacturer:
Caterpillar Inc.
Series:
3500 Series heavy-duty diesel engine family
Heritage:
Caterpillar has produced large industrial and marine diesel engines for decades, with the 3500 Series serving heavy-duty continuous and standby duty
3508:
V8 member of the 3500 Series
3512:
V12 member of the 3500 Series
3516:
V16 member of the 3500 Series
Evolution:
Ratings and configurations developed over the production life of the series for marine, electric power, petroleum, and industrial markets
Production Location:
Manufactured by Caterpillar at its large engine facilities; confirm plant details for the specific serial number
