The capacity plate on an IH truck displays both the chassis and engine serial
numbers. Starting with 1966 production, the 13-digit number identifies the model,
type of engine and type of cab for body) as well as the serial number of the
chassis. An example of a 13-digit serial number is D3117EGB20016.
The first four digits identify the model, the fifth digit the type of engine, and the
sixth digit the type of cab or body. This information is shown only on the capacity
The last seven digits with an alphabetical letter is the chassis serial number.
The seven digit serial number is the one that is stamped on the frame side rail and
is shown on the code sheet (line setting ticket) and the master parts catalog.
The first six digits that are shown on the capacity plate will be ignored when
servicing the truck and using the catalog. The last seven digits only, starting with
the alphabetical letter identifying the source, will be utilized for servicing the truck
PRINTED IN UNITED STATES OF AMERICA