TM 5-3810-300-24 & P3
General Information
ENGINE MODEL, SERIAL NUMBER AND OPTION PLATE
Engine Model and Serial Numbers
On all current Series 71 engines, the engine serial number and
the engine model number are stamped on the cylinder block
(Figs. 3 and 4). The engine serial number and model number
are also stamped on the Option Plate (when used) attached to
the valve rocker cover.
Engine Serial Number
The engine serial number is prefixed by numerals indicating
the number of cylinders and the letter "A" which designates a
Series 71 engine.
Engine Model Number
Current Series 71 engines are identified by an eight digit
model number (Fig. 2). The engine model number 10677001
illustrated is interpreted as follows: Series 71 Inline engine (1),
six-cylinder (06), vehicle engine (7), right-hand rotation with
"C" accessory arrangement (7), four-valve head "N" engine (0)
and specific model variation No. I (01).
Option Plate
Fig. 4 Typical Engine Serial Number and
Model Number As Stamped on Cylinder
An option plate, attached to the valve rocker cover, carries the
Block (Current Engines)
engine serial number and model number and, in addition, lists
any optional equipment used on the engine (Fig. 5). An
permanently in the option plate retainer. The current label
exhaust emission certification label, separate from the option
includes information relating to an engine family for the
plate, is mounted
maximum fuel injector size and maximum speed. Refer to
Section 14 for further information regarding emission
regulations.
With any order for parts, the engine model number and serial
number must be given. In addition, if a type number is shown
on the option plate covering the equipment required, this
number should also be included on the parts order.
All groups of parts used on an engine are standard for the
engine model unless otherwise listed on the option plate.
Fig. 3 Typical Engine Serial Number and
Model Number as Stamped on Cylinder
Block (Former Engines)
Fig. 5 - Option Plate
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