GENERAL MOTORS DIESEL
ENGINE MODELS PAGE 5
SEC. 1
ENGINE STANDARDIZATION
The two-cycle Diesel engines. discussed in this text
are offered in three, four, and six cylinder models
having the same bore and stroke and using the
same parts wherever possible. Thus, the major work-
ing parts, such as injectors, pistons, connecting rods,
bearings, and other parts are interchangeable.
ACCESSORY ARRANGEMENT
The blower, water pump, governor, and fuel pump
form a group of standard accessories which can be
located on either the right or the left side of the en-
gine, regardless of the direction of rotation. Further
flexibilityin meeting installation requirements is ob-
tained by placing the exhaust manifold and the
water outlet manifold on either side of the engine.
This variation in the arrangement
of
parts is secured
by having both the cylinder block and cylinder head
symmetrical at both ends and with respect to each
other. These various arrangements are designated
by the letters A, B, C, or D in the model number.
Letters R or L in the model number designate the
directionofrotation.
Engine Type
On
the LeftSide On the RightSide
A
Allstandard accessories Exhaust outlet
Water outlet
Allstandard accessories
B
Exhaust outlet
Water outlet
C
Exhaust outlet All standard accessories
Water outlet All standard accessories
DExhaust outlet
Water outlet
fig. 5-Accessory and
Manifold
Arrangements
(Engine Viewed
from
the
Rear).
ENGINE MODELS
Flexibilityin the location of the basic engine acces-
sories (such as the blower, governor, water outlet
manifold and exhaust manifold),and a wide range
of power take-offs and reduction gears makes it
possible to provide a suitable unit to fulfill most
requirements.
In the followingtabulations of some ofthe more com-
mon single-engine industrial models is shown the
interrelation of the model numbers of the three, four,
and six cylinder engine units. For each model
group, the direction of rotation, the accessory ar-
rangements, and the power take-off
is
indicated.
However, to meet specific requirements, either right-
or left-rotatingengines can be furnished.
In addition to single engine industrial models, the
General Motors Series 71 "Twin" and "Quad" mul-
tiple engine power units are designed to deliver in-
creased power to a single drive shaft with important
