Bosch 5302 Technical Information download pdf (Page 13)

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Workshop Manual_3 - 4 LD_cod. ED0053025560_4° ed_ rev. 03

Technical information

POSSIBLE CAUSES AND TROUBLE SHOOTING

THE ENGINE MUST BE STOPPED IMMEDIATELY WHEN:

1) - The engine rpms suddenly increase and decrease

2) - A sudden and unusual noise is heard

3) - The colour of the exhaust fumes suddenly darkens

4) - The oil pressure indicator light turns on while running.

TABLE OF LIKELY ANOMALIES AND THEIR SYMPTOMS

The following table contains the possible causes of some failures which may occur during operation.

Always perform these simple checks before removing or replacing any part.

PROBABLE CAUSES

ELECTRICAL

EQUIPMENT

SETTINGS AND REPAIRINGS

LUBRICATION

FUEL CIRCUIT

Excessive oil

consumption

Low oil

pressure

Oil level

increase

I n c o n s i -

stent rpm

It does not ac-

celerate

It starts but does

not stop

It does not

start

Oil and fuel le-

akage from the

exhaust

TROUBLE

Black smoke

White smoke

Cylinder head gasket

M A I N T E -

NANCE

Clogged pipings

Clogged fuel lter

Presence of air in the fuel circuit

Clogged tank breather

Faulty fuel pump

Blocked injector

Blocked injection pump valve

Wrong injector setting

Plunger excessive leakage

Stuck injection pump delivery control

Wrong injection pump delivery setting

High oil level

Blocked pressure relief valve

Worn oil pump

Presence of air inside the oil intake pipe

Faulty pressure gauge or switch

Clogged oil intake duct

Discharged battery

Inefcient or wrong cable connection

Faulty starting switch

Faulty starting motor

Clogged air lter

Excessive idle operation

Incomplete running-in

Overloaded engine

Advanced injection

Delayed injection

Incorrect governor tinkage adjustment

Broken or loose govener spring

Low idling setting

Worn or stuck piston rings

Worn or scored cylinders

Worn valve guides

Sticking valves

Worn crankshaft-connecting rod bearings

Non-sliding speed governor leverage

Crank shaft not turning freely

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