Caterpillar 3406E Service Manual (5EK, 6TS, 1WL, 5DS )


Print version. Factory Cat 3406E service manual for engines with serial numbers starting with 5EK, 1WL, 5DS & 6TS.

If you are performing any repair or service on the 3406E engine, this Caterpillar 3406E Service Manual contains is going to have all of the information you’ll need. 

This engine service manual set takes up very little space & includes the factory information you need to service and repair the 3406E engine.
Saving both, money and space. has been working with the Caterpillar print facility since 1999, ensuring the correct factory service information is available to fleets, municipalities, water districts, independent service facilities & more.  We at have always felt strongly that it is critical that the industry mechanics be supplied with the correct torque specifications, dimensions & procedures, electronic diagnostic information be made available.  The changes in the trucking industry over the decades have made it critical to “do the job once, do the job right”.

Procedures that may have been acceptable years ago would now likely cause rapid failures in a truck engine if they were used on present day engines & drivetrains.

The customer has two great advantages when dealing with

  1. Factory printed manuals
  2. 97% of all orders are shipped within 24 hours

Print version.  Factory Caterpillar 3406E service manual for engines with serial numbers starting with 5EK, 1WL, 5DS & 6TS.

Includes the following information:

  • Specifications
  • Systems Operation, Testing & Adjusting
  • Disassembly & Assembly
  • Air Compressor (as needed)
  • PTO
  • Troubleshooting
  • Electrical
  • Operation & Maintenance
  • More

Looking for CAT electronic technician (CAT ET)?

Cat 3406E Service Manual (s/n 5EK, 6TS, 1WL, 5DS ) | Diesel Diagnostic Equipment


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