Target Audience:
Equipment technicians, diesel mechanics, and DIY engine rebuilders
Application:
Parts identification and ordering for C6.6 engine overhaul and repair
Competitive Advantage:
Factory Caterpillar parts diagrams with exact part numbers for accurate ordering
Parts Diagrams:
Exploded views with part numbers and descriptions
Component Coverage:
Complete engine assembly breakdown
Usability:
Searchable PDF format for quick part lookup
Printing:
Fully printable pages for shop use
Engine Systems:
Cylinder block, cylinder head, valve train, timing, lubrication, cooling, fuel system, turbocharger, intake and exhaust
Parts Information:
Part numbers, descriptions, quantities, and exploded diagrams
Ordering Information:
Caterpillar part numbers for dealer ordering
Manual Type:
Parts Manual
File Delivery:
Instant download after purchase
Page Count:
Varies by edition - typically 300-500 pages
Cylinder Block Assembly:
Block, liners, main bearings, caps, and related hardware
Crankshaft and Pistons:
Crankshaft, connecting rods, pistons, rings, and bearings
Cylinder Head:
Head casting, valves, springs, guides, seals, and gaskets
Valve Train:
Camshaft, lifters, pushrods, rocker arms, and related components
Timing System:
Timing gears, timing cover, and related seals
Lubrication System:
Oil pump, oil pan, oil filter housing, cooler, and lines
Cooling System:
Water pump, thermostat housing, coolant lines, and related parts
Fuel System:
Fuel injection pump, injectors, fuel lines, filters, and related components
Turbocharger:
Turbo assembly, oil lines, and mounting hardware
Intake System:
Intake manifold, air cleaner components, and related parts
Exhaust System:
Exhaust manifold, pipes, and related components
Electrical System:
Sensors, wiring harnesses, alternator, and starter components
Front Gear Train:
Gears, housing, and related components
Flywheel and Housing:
Flywheel, ring gear, and flywheel housing
Accessory Drives:
Drive pulleys, belts, and tensioners
Parts Identification:
Exploded diagrams with part numbers and descriptions
Disassembly Reference:
Component breakdown for teardown
Assembly Reference:
Component build-up with part numbers
Part Interchange:
Cross-reference information where applicable
Specifications:
Torque and clearance data where included
Detail Level:
Complete engine parts breakdown
Diagram Type:
Exploded views with numbered callouts
Part Number Format:
Caterpillar standard part numbering
Index:
Part number index for quick lookup
Part Numbers:
Included for all components
Descriptions:
Component names and descriptions
Quantities:
Required quantities per assembly
Diagrams:
Exploded views showing component relationships
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
Configuration:
Inline 6-cylinder, 4-stroke diesel
Displacement:
6.6 L (403 cu in)
Aspiration:
Turbocharged and air-to-air aftercooled
Power Range:
Approximately 122-205 kW (164-275 hp) depending on application
Torque Range:
Varies by rating and application
Fuel Injection:
Common rail or mechanically controlled direct injection depending on tier
Emission Compliance:
Tier 3 / Stage IIIA depending on build configuration
Governor:
Electronic or mechanical depending on application
Oil and Filter Change:
Refer to equipment operation and maintenance manual for intervals
Fuel Filters:
Refer to equipment operation and maintenance manual
Air Filter:
Inspect and replace per equipment maintenance schedule
Valve Lash Adjustment:
Per Caterpillar service schedule
Engine Oil:
Caterpillar diesel engine oil or equivalent meeting required API/ACEA specification
Coolant:
Caterpillar Extended Life Coolant or equivalent
Fuel:
Ultra-low sulfur diesel per applicable emissions tier
Filters:
Oil, fuel, and air filters
Belts:
Drive belts and tensioners
Gaskets and Seals:
Various seals and gaskets throughout engine
Injectors:
Fuel injectors are a common wear item
Turbocharger:
Inspect for wear and oil consumption
Manufacturer:
Caterpillar Inc.
Headquarters:
Peoria, Illinois, USA
Industry:
Construction, mining, and industrial equipment
Engine Introduction:
C6.6 introduced in the mid-2000s
Generation:
C6.6 ACERT series
Emissions:
Evolved to meet Tier 3 / Stage IIIA regulations
Legacy:
Used in a wide range of Caterpillar and OEM equipment
Manufacturing:
Produced by Caterpillar and manufacturing partners
Global Support:
Worldwide Caterpillar dealer network
