Caterpillar 3046 Diesel Engine Service Manual


Covers: Cat 3046 diesel engine

  • For 5XK and MHK engine serial numbers
  • Please contact us with your ESN if you compatibility questions

Pages: 791
: PDF files
File size: 48mb
Compatibility: Windows/Mac/Tablet/Smartphone
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 5XK and MHK diesel engines used in various Cat machines. Over 700 pages of detailed shop information are included in this download. The service manual follows OEM standards and is essential for diesel mechanics working on the engine. The included manuals are searchable and printable and can also be easily navigated with bookmarks. View them on your computer or print them off for the shop without worrying about damaging an expensive book, saving your business time and money.

Files included:

  • 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 More…

Have any questions or need more details? Contact Us


Displacement – 5.0L (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, 18:1, 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: ,