caterpiller engine

INTRODUCTION

This presentation is about the 3500 Series Engine. One arrangement of the 3516 Vehicular Engine is used for most illustrations.

The 3500 Series Engine is a diesel engine with a

4-stroke cycle. It has a 60 degree “Vee” angle between the cylinders of the block. The cylinder bore is 170 mm (6.7 inch) and the piston stroke is 190 mm (7.5 inch). Each cylinder has approximately 4310 cu. cm. (263 cu. in.).

Standard engine rotation is counterclockwise. See

the Service Manual for Firing under specs (V8

and V16).

ORIENTATION

Looking at the right side of the engine, we see the:

1. cylinder heads, block and oil pan

2. valve covers

3. rear lifting eye

4. turbocharger (one of two)

5. oil cooler and oil pump

6. fuel priming pump, two secondary fuel filters,

and fuel transfer pump

7. crankcase filler opening and dipstick

8. air starting motor

9. water pump; and

10. alternator

NOTE: This is the first Caterpillar engine designed to

metric dimensions. All engines in the series have the

same bore and stroke and have the push rod valve

design. All engines are turbo charged and

aftercooled. All 3500 Series Engines have direct

injection combustion systems with a unit injector

fuel system.

On the front of the engine, we see:

1. the Caterpillar 3161 governor

2. the water pump and the line to the aftercooler

3. the thermostat housing and the bypass line

4. the vibration damper, and crankshaft pulley

The fan pulley and idler pulley is driven from the

crankshaft pulley belts. The fan pulley and idler

pulley each have an adjustment to adjust the

tension of the fan (drive) belts.

The plates shown on the right can be removed to install

other accessories on the auxiliary drives. The

governor and crankcase breather can be installed

on either the left side or right side.

On the left side we see:

1. the oil supply line (arrow)

2. the oil filter base/housing and four oil filters

3. the oil supply and oil drain for the turbocharger

4. the fume disposal group

Also on the rear we see three auxiliary drives above the

flywheel housing. Two turbochargers are

installed on this engine. This is the location of

the turbochargers on the vehicle arrangements.

Turbochargers can also be installed above the

rear of the engine for industrial generator set and

marine engines (shown later)

BASIC ENGINE

This is the flywheel housing and the flywheel. The

standard vehicular flywheel housing is SAE No.

“O”. The flywheel housing for the Marine,

Industrial, and Generator Set is SAE “OO”. The

SAE No. “O” is available for Marine, Industrial,

and Generator Set engines.

The starting motor is normally installed on the right

side of the engine. An air starting motor is

shown. There are two optional locations for the

starting motors.

. . . on the left side. The two plates cover the openings

for the optional locations for the starting motors.

Air or electric starting motors are also available.

SERIAL NUMBER PLATE

The serial number plate is on the left side of the

camshaft compartment near the rear of the

engine block.

Also you can see the location of the camshaft

compartment covers and the crankcase

compartment covers.

The serial number plate has the model number, serial

number, arrangement number, and modification

number. All numbers must be included on

Service Reports with warranty claims and when

ordering parts.

INFORMATION PLATE

This information plate is on the right side of the engine.

On later engines, the plate is on the left-hand side in

front of the cylinder head. This plate has the

high idle rpm, full load rpm, power setting and

other important engine information.

Other plates and transfers (not shown) give you

information about valve adjustment.

more links for caterpillar engines:

1. CRANKCASE EXPLOSION RELIEF VALVES,WOODWARD ELECTRIC GOVERNOR
2. DIRECT INJECTION UNIT INJECTOR FUEL SYSTEM - caterpillar fuel system
3. LUBRICATION SYSTEM - Caterpillar
4. Cooling System - Caterpillar
5. Caterpillar air induction system ( flow of air from filter to overboard )
6. Power Transmission, clutches and types...!!
7. Caterpillar - Tappet Clearance !
8. Difference between MUI and EUI in cylinder head