TRUCK SERVICE MANUAL
THE MANUAL AND ITS ARRANGEMENT
This manual covers the basic 855 Cubic Inch
The average repair shop does not have all the factory
Displacement Engine Series built by Cummins Engine
facilities to do machining; however, it must be equipped
Company, Inc., Columbus, Indiana and its subsidiaries.
with sufficient tooling to duplicate factory standards if the
These engines are used in many applications and have
rebuilt unit is to do a good job.
gained world-wide recognition for their dependability and
simplicity of design.
Cummins Service Tools identified by "ST" numbers are
listed at the beginning of each group and described as
those required and those which are desirable.
Parts Dimensions, Wear Limits And Torque
Procedures for use of those Service Tools that are most
difficult to use are described at the end of each group.
An exploded view of components and pertinent
Cummins Service Tools may be ordered through
specifications are listed in a table at the beginning of
each Group. Worn limits are listed where applicable.
Torque specifications are within the text or tabulated the
same as parts dimensions.
Cummins Engine Company, Inc. is constantly improving
its products and Cummins Distributors and Dealers are
Near the end of the manual is Section 18, a complete
kept fully abreast of these improvements, and where
tabulation of parts dimensions, worn limits and torque
possible the instructions to apply the improvements to
engines already in service at the lowest possible cost to
the engine owner. Information on improvements and
changes are released and arranged using the group
Worn limits, as stated in this manual, indicate that the
number system so the Distributor or Dealer has a ready
part may be reused if it is at the worn limit. Discard only
cross reference between manuals, new information and
if it exceeds the worn limit. Of course, the reuse of any
parts. Complete new products as released will be
part is partially the responsibility of the person making
applied to the engine group within which it is used or, if
the inspection, as it could well be damaged in an area
necessary, a new group will be established.
not listed as a worn limit, thus making it unfit for further
Units such as fuel pumps, injectors, air compressors and
turbochargers are also used on other models of
These group sections are in
separate manuals and written so they may be used with
other engine shop manuals, These units are covered in
full detail to make the information as useful and
universally applicable as possible.
Units such as hydraulic governors, exhaust brakes,
thermatic fans, etc. are sometimes used on Cummins
Engines. These special units are listed in the group in
which they operate (hydraulic governors with Fuel Pump
Group, etc.), information not contained in this or separate
Cummins manuals must be obtained from the