Cummins NT855 Big Cam III, IV Diesel Engine Service Manual



  • Covers Cummins NT855 Big Cam III (BC3) and Big Cam IV (BC4) Diesel Engine
  • 693 pages
  • Instant PDF Download
  • Bookmarked, searchable, printable
  • Compatible with Windows/Mac/Tablet
  • 1986 publication

This manual covers repair and troubleshooting of the Cummins NT855 “Big Cam III” and “Big Cam IV” diesel engine. It includes detailed specifications, illustrations and procedures to guide the mechanic with correctly repairing the engine to the manufacturer’s specifications. This downloadable factory Cummins service manual is also known as the repair manual or workshop manual.

Cummins NT855 Big Cam III, IV Diesel Engine Service Manual Contents:


Engine Identification
– General Engine Specifications
– Engine Diagrams

– Procedures and Techniques
– Symptoms List
– Symptoms Cause and Corrections Charts

Engine Systems Repair
– Cooling
– Lubricating Oil
– Combustion Air
– Compressed Air1
– Fuel System
– Electrical
– Base Engine Components

Engine Testing (In-Chassis)

Engine – Remove and Install

Engine Component Specifications

Torque Values

Alphabetical Index

And More…


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