Caterpillar 3046 Diesel Engine Service Manual


Covers: Cat 3046 Diesel Engine

  • For Cat Machines
  • Please contact us with your serial number if you compatibility questions

Pages: 791
: PDF files (zipped)
File size: 48mb
Compatibility: Windows/Mac computers
Notes: Instant digital download only – no printed copy or CD-ROM media.

This downloadable PDF service manual contains specifications, service and rebuild procedures, testing/adjusting and troubleshooting information for Cat 3046 diesel engines used in various Cat machines. Over 700 pages of pages of detailed shop information for the engine are included in this download. The service manual follows the manufacturer’s standards for troubleshooting, service and repair and is essential for all diesel mechanics working on the Cat 3046 diesel engine. The included manuals are searchable and printable and can be easily navigated. View the manuals on your computer or print them off for the shop without worrying about tearing an expensive book, saving your business time and money.

This download includes:

  • Cat 3046 Diesel Engine Specifications Manual
  • Cat 3046 Diesel Engine Systems Operation Manual
  • Cat 3046 Diesel Engine Disassembly and Assembly
  • Cat 3046 Diesel Engine Testing and Adjusting Manual (Including Troubleshooting)
  • Nippondenso Fuel System Shop Manual
  • And much more…

How does this work?

It’s simple – after purchasing this manual through our secure checkout, a download link will be sent to the email address you specify at checkout. You have up to 90 days to retrieve and save the file. Once saved, the manual is yours for good.

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Displacement … 5.0 L (305 cu in)
Cylinder arrangement … In-line
Type of combustion … direct injection
Firing order … 1, 5, 3, 6, 2, 4
Compression ratio
Naturally aspirated engines … 18:1
Turbocharged engines … 17:1 or 18:1
Turbocharged engines … 19:1
Number of cylinders … 6
Valves per cylinder … 2
Valve lash (Cold)
Inlet valve … 0.25 mm (0.010 inch)
Exhaust valve … 0.25 mm (0.010 inch)
Fuel injection timing
In-line fuel pump … 14° or 19° BTC
Distributor pump … 5° BTC
The cylinder head assembly has two overhead valves (10) for each cylinder. Each valve is held in
place by a single valve spring (9), a valve spring retainer (7), and two valve keepers (6). The cylinder
head has steel valve seat inserts (4) for both the inlet and exhaust valves. The valves move in steel
valve guides (1). Each valve guide is equipped with a synthetic rubber valve seal (8). The exhaust
valve guides have a counterbore in order to prevent seizure of the valve stem that is caused by a
buildup of carbon underneath the head of the valve. Both the valve seat inserts and the valve guides
can be renewed.
The overhead valves are operated by a rocker shaft assembly that is installed under a valve
mechanism cover. The forged steel rocker arms are operated by cold drawn pushrods with hardened
heads. The rocker shaft is supported by four steel brackets that support the rocker shaft between each
pair of valves. The rocker shaft assembly and valve components are lubricated by an oil flow from the
hollow rocker shaft. The rocker shaft receives a reduced oil flow from the oil feed of the camshaft.
Valve lash is adjusted by adjustment screws and locknuts at the pushrod end of each rocker arm.

SKU: CAT-3046-SM Categories: ,