CHAPTER 1. INTRODUCTION - TM-9-2815-213-340009

*TM 9-2815-213-34

CHAPTER 1

INTRODUCTION

Section I. General

1-1. Scope

1-2.

Forms and Records

a. This technical manual contains instruction for

Maintenance forms, records, and reports which are to be

used by maintenance personnel at all maintenance

direct and general support maintenance of the Cummins

levels are listed in and prescribed by TM 38-750.

Diesel Engine, Model V8-300, (fig. 1-1 and 1-2). It

contains descriptions of, and procedures for,

1-3.

Reporting of Equipment Publication

disassembly, inspection, repair, rebuild, and assembly of

Improvement

the engine.

The

reporting

errors,

omissions,

and

b. Appendix A contains a list of current refer ences,

recommendations for improving this publication by the

including supply manuals, forms, technical manuals, and

individual user is encouraged. Reports should be

other available publications applicable to the engine.

submitted on DA Form 2028, Recommended Changes to

c. Appendix B lists repair parts, special tools, and

Publications, and forwarded direct to the Commanding

test equipment required for the performance of direct

General, U.S. Army Tank-Automotive Command

and general support maintenance of the engine.

Attention: ASMTA-4, Warren, MI 48090.

Section II. Description and Data

gases from the cylinders. Proper engine operation

1-4. Description

depends upon the high compression of the intake air and

a. General.

the timed injection of the correct measure of diesel fuel

(1) In this manual the following terms will be used to

into the cylinder.

identify the location for engine parts and assemblies:

b. Engine Assembly. The model V8-300 engine

(a) Front-fan end of engine.

(fig. 1-1 and 1-2) is a diesel eight cylinder V-type, valve in

(b) Rear-flywheel end of engine.

head, water cooled, compression ignition engine. The

engine is rated 300 horsepower at 3000 rpm and will

the rear.

operate on diesel fuel.

(2) The model V8-300 diesel engine is as eight

c. Engine Systems.

cylinder,

V-type,

Valve-in-head,

water

cooled,

(1) Fuel System. The system consists of a filter, fuel

compression-ignition engine, using the four stroke cycle

pump with governor, fuel passages, and injectors (one

principle of operation. The four strokes consist of intake,

for each cylinder). The system is designed so that the

compression, power and exhaust. Intake and exhaust

volume of liquid flow is proportionate to the fluid

valves, and fuel injectors, are operated from a single

pressure, the time allowed to flow, and the size of the

camshaft. The intake stroke of the cycle brings filtered,

orifice fuel flows through. The pump draws fuel from the

heated air to the cylinders. The compression stroke

vehicle supply tank and delivers it to each injector. A

compresses the air (17:1 compression ratio) to 500-600

governor controls the flow of fuel from the gear pump, as

p.s.i, and raises the cylinder temperature to

well as the idle and maximum engine speed.

approximately 1000 degrees Fahrenheit. During the top

(2) Lubrication System. All working parts of the

of the compression stroke and start of the power stroke,

engine are pressure lubricated. Oil is supplied by a dual-

a metered charge of diesel fuel is injected into the

type gear driven lubricating pump located below the

cylinders. The high temperature within the cylinders

crankshaft and driven by the crankshaft gear. On

ignites the diesel fuel resulting in the power stroke. The

completion of the lubrication cycle, oil is accumulated in

fourth stroke of the cycle exhausts the burned

the oil pan sump by gravity and is drawn from this sump

by the oil

1-1