Model Series:
3500 Series
Model Variants:
3508, 3512, 3516
Engine Configuration:
3508: V-8; 3512: V-12; 3516: V-16
Production Years Covered:
N/A - exact production range not specified in this manual
Application:
Industrial / continuous and intermittent duty
Aspiration:
Turbocharged and aftercooled
Target Audience:
Industrial engine technicians, fleet maintenance crews, and experienced DIY mechanics
Application Segments:
Power generation, marine, petroleum, and general industrial drives
Design:
Heavy-duty 3500 Series platform with direct injection and robust bottom-end construction
Serviceability:
Widely supported platform with extensive parts and service availability
Durability:
Built for high-hour operation under continuous load
Combustion System:
Direct injection
Cylinder Heads:
Four-valve per cylinder design
Fuel System:
Mechanically governed unit injector system
Control:
Lever governor with fuel ratio control
Fuel System:
Unit injectors, fuel lines, fuel filters, fuel ratio control
Air Induction:
Air cleaners, aftercooler, inlet manifolds
Exhaust System:
Exhaust manifolds, turbocharger, piping
Lubrication System:
Oil pump, oil cooler, filters, galleries
Cooling System:
Water pump, thermostats, radiator, jacket water system
Electrical System:
Charging, sensors, control wiring
Starting System:
Starting motor and air starting options
Governor System:
Lever governor adjustment and repair
Turbocharger:
Inspection, rebuild, and installation
Control Systems:
Fuel ratio control and governor linkage
Troubleshooting:
Systematic fault diagnosis for each major system
Testing and Adjusting:
Engine testing, tune-up, and specification checks
Disassembly:
Step-by-step teardown procedures
Assembly:
Reassembly procedures with clearances and sequence
Tightening Torques:
Torque tables for critical fasteners
Wiring Diagrams:
Electrical schematics for engine systems
Engine Testing:
Performance and operational test procedures
Technical Depth and Parts
Component Identification:
Part names with reference to replacement
Specifications:
Clearances, wear limits, and adjustment values
Illustrations:
Diagrams and exploded views
Parts Information:
Component-level detail for ordering and replacement
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
3508:
V-8, 34.5 L displacement
3512:
V-12, 51.8 L displacement
3516:
V-16, 69.1 L displacement
Rated Output Range:
Varies by rating and application; refer to engine arrangement for exact figures
Governor:
Lever governor with fuel ratio control
Duty Ratings:
Industrial continuous and intermittent ratings
Injection Type:
Direct injection
Fuel Control:
Mechanical unit injectors
Standard Transmission:
N/A - industrial engine; transmission is application-dependent
Optional Transmission:
N/A - not supplied as part of the engine package
Coupling:
Flywheel and housing for driven equipment
Speed Control:
Governor-controlled engine speed
Power Take-Off:
Flywheel power take-off to driven equipment
Wheelbase:
N/A - not applicable to a stationary engine
Length:
Depends on engine configuration and attachments
Width:
Depends on engine configuration and attachments
Height:
Depends on engine configuration and attachments
Curb Weight:
Varies by configuration, turbocharger, and accessories; consult engine arrangement data
Crash Test Ratings:
N/A - industrial engine, not a vehicle
Protective Shutdown:
Overspeed and low-oil-pressure protection available with engine controls
Shutdown Systems:
High coolant temperature and low oil pressure shutdowns
Alarms:
Warnings for critical operating parameters
Monitoring:
Gauges and senders for oil pressure, temperature, and speed
Governor:
Mechanical lever governor
Fuel Ratio Control:
Limits fuel during acceleration to control smoke
Charging System:
Battery charging alternator
Starting:
Electric or air starting configurations
Maintenance Schedule:
Follow the interval chart in the manual, adjusted for duty cycle and fuel quality
Oil and Filter Change:
Interval determined by duty and oil analysis
Valve Lash:
Check and adjust at scheduled intervals per manual
Coolant Condition:
Check inhibitor levels and concentration regularly
Fluids and Specifications
Engine Oil:
Use oil meeting the viscosity and grade recommended for the ambient temperature range
Coolant:
Use Caterpillar-recommended coolant with proper inhibitor concentration
Fuel:
Clean diesel fuel meeting engine fuel specification
Filters:
Oil, fuel, and air filters
Belts and Hoses:
Inspect for wear and replace as needed
Turbocharger:
Inspect for oil leaks and play
Injectors:
Service and adjustment as performance degrades
