ISSUE CTOBER THE 'LPWG' SERIES OPERATORS HANDBOOK PETTER LPWG... · user should consult the local...

Lister-Petter LPWG Operators Handbook i

THE 'LPWG' S ERIES

OPERATORS HANDBOOK

ISSUE 2: OCTOBER 2000

HANDBOOK CONTENTS

GENERAL INFORMATION......................................... SECTION 1

STARTING AND STOPPING ...................................... SECTION 2

THE OIL AND GAS SPECIFICATIONS ........................ SECTION 3

THE GAS SYSTEM ............................................... SECTION 4

THE GAS ELECTRICAL SYSTEM .............................. SECTION 5

ROUTINE MAINTENANCE ........................................ SECTION 6

Lister-Petter LPWG Operators Handbookii

Lister-Petter LPWG Operators Handbook 1.1

GENERAL INFORMATION 1

1. GENERAL INFORMATION

CONTENTS

page

1.1 Introduction ..................................................................................... 1.2

1.2 How to use this Operators Handbook Supplement ......................... 1.2

1.3 LPWG Engine Features .................................................................. 1.3

1.4 Nomenclature .................................................................................. 1.4

1.5 Safety Precautions .......................................................................... 1.4

1.6 Caring for Your new Engine ............................................................ 1.6

1.7 Running-in ....................................................................................... 1.6

Lister-Petter LPWG Operators Handbook1.2

1 GENERAL INFORMATION

1.1 IntroductionThe purpose of this handbook is to lay

down operating guidelines for the currentLPWG engine range.

The specification details given apply toa range of engines and not to any oneparticular engine, in cases of difficulty theuser should consult the local Lister-PetterDistributor or Dealer for further advice andtechnical assistance.

The information, specifications,illustrations, instructions and statementscontained within this publication are givenwith our best intentions and are believedto be correct at the time of going to press.

Our policy is one of continueddevelopment and we reserve the right toamend any technical information with orwithout prior notice.

Whilst every effort is made to ensurethe accuracy of the particulars containedwithin this publication neither theManufacturer, Distributor or Dealer shallin any circumstances be held liable for anyinaccuracy or the consequences thereof.

The information given is subject to theCompany’s current Conditions of Tenderand Sale, and is for the assistance of usersand is based upon results obtained fromtests carried out at the place ofmanufacture. This Company does notguarantee that the same results will beobtained elsewhere under differentconditions.

1.2 How to use this OperatorsHandbook Supplement

This supplement is designed to be readin conjunction with the LPA, LPW andLPWS Operators Handbook, 027-08182.

It is recommended the individual stepscontained in the various maintenance orrepair operations are followed in thesequence in which they appear.

When an engine is operating or beingoverhauled there are a number ofassociated practices which may lead topersonal injury or product damage.

Your attention is drawn to the symbolsshown and described below which areapplied throughout this publication.

CAUTIONThis caution symbol draws attention tospecial instructions or procedures which,if not correctly followed, may result indamage to or destruction of equipment.

WARNINGThis warning symbol draws attention tospecial instructions or procedures which,if not strictly observed, may result inpersonal injury.

WARNINGA WARNING SYMBOL WITH THIS TYPEOF TEXT DRAWS ATTENTION TOSPECIAL INSTRUCTIONS ORPROCEDURES WHICH, IF NOTSTRICTLY OBSERVED, MAY RESULT INSEVERE PERSONAL INJURY, OR LOSSOF LIFE.

Note:A note is used to draw your attention toadditional or important information.


GENERAL INFORMATION 11.3 LPWG4 Engine Features

Radiator Filler Cap

AlternatorAir Cleaner

Starter Motor

Ignition Coils

Main GasSolenoid Valveand Regulator

Electronic Governorand Carburettor

Radiator Fan

Oil Filter

Main GasSolenoid Valveand Regulator

Spark Plug

ExhaustOutlet

Electronic Governorand Carburettor

European Version

USA Version



1.4 NomenclatureLPWG2, 3 and 4 - two, three and four

cylinder, gas fuelled, naturally aspiratedwater cooled engines.

1.5 Safety PrecautionsThe following safety precautions are of

a general nature more specific precautionsappear where they are relevant.

Reference must also be made to thelocal regulations in the country ofoperation.1.5.1 Before Starting Precautions

WARNINGStarting any engine can be dangerous inthe hands of inexperienced people. Engineoperators must be instructed in the correctprocedures before attempting to start anyengine.

� Ensure the engine is free to turnwithout obstruction.

� Check that the water and lubricatingoil levels are correct.

� The radiator should be filled to within13mm-25mm (0.5-1.0in) below theneck of the radiator filler.

� The oil sump must be filled to the ‘full’or ‘max’ mark on the dipstick; do notoverfill.

� Ensure that the battery is connected,fully charged and serviceable.

� Where possible, disengage the drivenequipment while starting.

1.5.2 Alternator PrecautionsThe following points must be strictly

observed when an alternator is fittedotherwise serious damage can be done.� Never remove any electrical cable

while the battery is connected in thecircuit.

� Only disconnect the battery with theengine stopped and all switches in theOFF position.

� Always ensure that cables are fittedto their correct terminals.A short circuit or reversal of polaritywill ruin diodes and transistors.

� Never connect a battery into thesystem without checking that thevoltage and polarity are correct.

� Never flash any connection to checkthe current flow.

� Never experiment with anyadjustments or repairs to the system.

� The battery and alternator must bedisconnected before commencing anyelectric welding when a pole strap isdirectly or indirectly connected to theengine.

1.5.3 Starter Battery Precautions� Do not smoke near the batteries.� Keep sparks and flames away from

the batteries.� Batteries contain sulphuric acid - if the

acid has been splashed on the skin,eyes or clothes flush it away withcopious amounts of fresh water andseek medical aid.

� Keep the top of the battery wellventilated during charging.

� Disconnect the battery negative(earth) lead first and reconnect last.

� Switch off the battery charger beforedisconnecting the charger leads.

� Never 'flash' connections to checkcurrent flow.

� Never experiment with adjustments orrepairs to the system.

� A damaged or unserviceable batterymust never be used.


GENERAL INFORMATION 11.5.4 General Precautions� Ensure the engine is securely

mounted.� Ensure that there is a generous supply

of cooling and combustion airavailable.

� Keep the engine and surrounding areaclean.

� Keep all safety guards in position.� Keep the body and clothing clear of

all moving or hot parts.� Thoroughly clean any lubricating oil

from the skin as soon as practicableafter contact.

� Rectify all water and oil leaks as soonas practicable and clean any spillageswhen they occur.

� Engine lifting eyes must not be usedto lift the complete plant.

1.5.5 Lifting PrecautionsThe following points must be

considered before attempting to lift theengine.� Ensure the lifting equipment to be

used has the correct capacity to lift theengine.

� Single lifting equipment must only beused when a single lifting eye is fitted.

� When two engine lifting eyes are fittedsuitable lifting equipment designed togive two vertical lifts from directlyabove the engine lifting eyes must beused.

� Check that the engine lifting eyes arenot damaged and that they are secure.

� To prevent damage to the cylinderhead cover ensure that there isclearance between the liftingequipment hooks and the cover.

� The lifting eyes fitted to the engine aresuitable for lifting the engine, andgearbox if fitted, and accessoryassemblies originally fitted by Lister-Petter.

WARNINGEngine lifting eyes must not be used to liftthe complete plant.

1.5.6 Gas Safety Precautions

WARNINGGAS IS FLAMMABLE AND EXPLOSIVEAND CAN CAUSE SEVERE PERSONALINJURY OR DEATH.� Take special care to ensure all

sources of ignition are well away fromareas where fuel fumes are presentand areas sharing ventilation.

� Gas fuel lines must be secured, freeof leaks and separated, or shieldedfrom electrical wiring.

� Take care to prevent leaks which canlead to explosive accumulations ofgas.Natural gas is lighter than air and riseswhen released.LPG is heavier than air and sinkswhen released.

� Approved non-conductive flexible fuelpipes should be used for gasconnections to the engine.

WARNINGIn the event of a gas leak stop the engineimmediately.Do not attempt to restart the engine untilthe leak has been investigated andrepaired.



1.6 Caring for Your new EngineThis handbook supplement has been

supplied with your new engine to helpassist you in the correct operation andmaintenance of your engine.

To obtain the best performance fromyour engine you must ensure that all theinstructions given in "6.3 MaintenanceSchedule" are correctly carried out at theprescribed intervals.

Some maintenance work can only becarried out if the necessary hand andservice tools are available.

When the user has insufficient tools,experience or ability to carry outadjustments, maintenance and repairsthen this work should not be attempted.

1.7 Running-inA gradual running-in of a new engine

is not necessary. Extended light loadrunning early in the life of the engine maycause detrimental damage to the cylinderbore allowing lubricating oil to enter theexhaust system.

Maximum load can be applied to theengine as soon as it enters service.

To help assist engine running-in, allengines are despatched with an initial filllubricating oil which must be changed after100 hours.

1.5.7 Filter and Element Precautions� Used liquid filters and elements

contain some of the filtered liquid andshould be handled and disposed ofwith care.

� After handling new or used elementsthe users hands should be thoroughlywashed, particularly before eating.

WARNINGNew lubricating oil may cause skinirritation.Contact with used lubricating oil can causecancer, birth defects or other reproductiveharm.

WARNINGThe materials used in the manufacture andtreatment of some filters and elements maycause irritation or discomfort if they comeinto contact with the eyes or mouth andthey may give off toxic gasses if they areburnt.

1.5.8 Waste Disposal Precautions� Extreme care must be taken to ensure

that waste fuel, oil, filter elements,acid, coolant concentrate, paint,solvents or other toxic wastes aredisposed of in accordance with localregulations to prevent contamination.


STARTING AND STOPPING 2

2. STARTING AND STOPPING

CONTENTS

page2.1 Starting ............................................................................................ 2.2

2.2 Stopping .......................................................................................... 2.2


2 STARTING AND STOPPING

The following information is of ageneral nature and should be read inconjunction with, or substituted by, theequipment manufacturers instructions.

WARNINGStarting any engine can be dangerous inthe hands of inexperienced people.Before attempting to start any engine theoperator should read the “1.5 SafetyPrecautions" and be conversant with theuse of the engine controls and the correctstarting procedures.

WARNINGEXHAUST GASSES CONTAIN CARBONMONOXIDE WHICH IS A COLOURLESS,ODOURLESS AND POISONOUS GASTHAT CAN CAUSE UNCONSCIOUSNESSAND DEATH.

2.1 Starting the Engine

WARNINGIF THE ENGINE FAILS TO STARTWITHIN 30 SECONDS, RELEASE THEKEY AND ATTEMPT TO RESTARTAFTER ALLOWING SUFFICIENT TIMEFOR ALL MOVING PARTS TO STOP.FAILURE TO OBSERVE THIS MAYRESULT IN AN EXPLOSIVE MIX IN THEEXHAUST SYSTEM.

1. Press and hold the low oil pressureswitch bypass button during enginecranking and until the engine attainsfull speed.

2. Turn the key clockwise to the ‘START’position and release it immediately theengine starts.

Figure 2.1.1 Key Start

2.2 Stopping the Engine1. If possible remove the load from the

engine.2. Turn the key to the ‘STOP’ position.

Figure 2.2.1 Key Start


THE OIL AND GAS SPECIFICATIONS 3

3. THE OIL AND GAS SPECIFICATIONS

CONTENTS

page3.1 Oil Specification .............................................................................. 3.2

3.2 Gas Specification ............................................................................ 3.2


3 THE OIL AND GAS SPECIFICATIONS

3.1 The Oil SpecificationTo help assist engine running-in, all

engines are despatched with an initial fillof BP 7455 lubricating oil which must bechanged, with the filter, after the first 100hours and then as specified below. Thefirst fill oil is formulated specifically forgaseous-fuelled engines.

After the first-fill oil and filter change at100 hours the engine should be filled withMobil Pegasus 480 SAE40, Mobil DelvacSuper GEO 15W 40 or a similar type oflubricating oil.

If these oils are not available, a namebrand detergent lubricating oil specified forautomotive gasoline engines can be used.

The required minimum zinc content forLPWG lubricating oil is 800 parts permillion (ppm). Most lubricating oils for flattappet engines have a zinc content ofabout 1200 ppm.

WARNINGDo not use lubricating oils formulated forlarge industrial gas engines with rollertappets, as the zinc content is insufficientto protect the camshaft and flat tappets.

3.2 The Gas SpecificationLPWG gaseous-fuelled spark-ignition

engines are designed to operate on eithernatural gas or vaporised propane fuelmeeting the specifications given.

Fuel gases with properties fallingoutside the specifications will not providethe same rated output from the engine, andin some cases may result in high exhaustgas temperatures and/or detonation, whichcan be detrimental to the service life of theengine.

Pipeline gas with large and varyingamounts of inert gases will require a muchgreater quantity of fuel for a given quantityof air. In these applications the engine willneed to be set up on site for the particularfuel, by an experienced technician.

Engines can operate with little loss ofpower on fuel gases with very low heatvalues, provided that a sufficient quantityof fuel can be introduced to keep the air/fuel ratio in balance. Consult Lister-Petterfor further information.

WARNINGOperation on 'sour' wellhead gas has notbeen approved by Lister-Petter.

Type of Gas

Natural Propane

Calorificvalue

kcal/m3 9228 22764

Btu/ft3 1037 2558

Specificgravity 0.601 1.552

Methane min 85% -

Propane min - 90%

Propylene max - 5%

Butaneand heavier max - 2.5%


THE GAS SYSTEM 4

4. THE GAS SYSTEM

CONTENTS

page4.1 Principle of Operation...................................................................... 4.2

4.2 Carburettor ...................................................................................... 4.2

4.3 Secondary Gas Pressure Regulator ............................................... 4.2


4 THE GAS SYSTEM

4.1 The Principle of OperationThe carburettor uses a sliding air and

gas valve assembly to meter the requiredamount of fuel for the speed and load atwhich the engine is running.

The air valve is held in the closedposition by a metering spring, and isopened by increasing airflow through thecarburettor. Airflow through the carburettorapplies an increasing vacuum signal to thebottom of the air valve, opening it againstspring tension and thus admitting anincreased quantity of fuel to keep the air/fuel ratio in balance.

The air/fuel ratio at idle is controlledby the idle air bypass adjustment screwwhich is located on the side of thecarburettor, below and to the right of thefuel inlet connection.

The adjustment screw bypasses aportion of the incoming air around the airvalve. Turning the screw in, or clockwise,gives a richer air/fuel ratio, turning it out,or anti-clockwise gives a leaner ratio.

Wide-open throttle air/fuel ratio iscontrolled by the power mixture valvewhich is located on top of the carburettor.The limits of adjustment are marked 'R'(rich) and 'L' (lean); fully turned to the leftis the maximum rich, and fully turned tothe right will result in maximum lean.

The air/fuel ratio between idle andwide-open throttle is determined by the

shape of the gas metering valve, which ispart of the air valve assembly. This isgenerally shaped to produce leanermixtures at light loads and increasinglyricher mixtures at heavier loads.

4.2 The CarburettorNon-emission Compliant Engines

These engines use an IMPCOTechnologies model CA55-8 carburettorfor both natural gas and propane fuels.Emission Compliant Engines

These engines use a CT55-8carburettor for natural gas and a CT55-10carburettor for propane.

'CT' carburettors have tamper proofidle air bypass and power mixtureadjustments. The CT55-10 has a specialgas valve to give leaner air/fuel ratios withpropane fuel.

Lean air/fuel ratios (excess air) areused to achieve emissions compliancewithout any form of after treatment.

WARNINGCARB and EPA emissions compliantengine adjustments are factory sealed. Noattempt should be made to change theseadjustments.

4.3 The Secondary GasPressure Regulator

CAUTIONThe regulator is not a fuel shut-off device.

The purpose of the secondaryregulator is to provide a constant fuelsupply pressure to the carburettor. Thisoutlet pressure will remain constantdespite fluctuations in the inlet pressure.

The gas pressure regulator functionsto control pressure, not flow. Flow is afunction of the pressure and resistancewithin a circuit, which in this case is thecarburettor mixer.

The regulator functions by balancingoutlet pressure on one side of a rubberdiaphragm against spring tension on theopposite side.

The secondary regulator is mounted ona bracket to the top left side of the flywheelhousing.

Fuel gas is supplied to the carburettorthrough a flexible pipe.

The atmospheric vent port on theregulator is connected to the carburettorair horn by a flexible balance pipe. Thisallows the air/fuel ratio to remain constant.

A dirty air cleaner restricts the airflowinto the engine; this restriction iscommunicated to the 'atmosphere' side of


THE GAS SYSTEM 4the regulator diaphragm by the balancepipe. The regulator outlet pressure isreduced slightly, thus keeping the air/fuelratio in balance.

A 12 volt DC powered gas solenoidvalve is provided immediately before thesecondary regulator inlet. When thesolenoid is energised, the valve opens toallow gas to pass to the secondaryregulator. The valve inlet connection is afemale 3/4in NPT (U.S. National Taper Pipe)thread.

CAUTIONLeakage can occur if the fuel supply pipeand fittings are not aligned correctly.

Regulator Inlet PressureFuel gas is supplied to the secondary

regulator at a positive pressure in therange of 17.8-50.8mbar (7.4-20.4 in WG).

WARNINGDo not exceed 49.3mbar (19.8in WG) asdamage to the regulator diaphragm willresult.

At least one additional primaryregulator is usually required to drop theline pressure (natural gas) or the tankpressure (vaporised propane) to therequired inlet pressure.

In some countries, natural gas linepressure may be as low as 12.0mbar (4.8inWG).

The vapour pressure of propane is8.3bar (120lb/in2) at 39°C (70°F).

Vapour propane installations willrequire two regulators in series betweenthe tank and the secondary regulator.

Regulator Outlet PressureA Maxitrol model RV-52 regulator is

used on natural gas engines.A Maxitrol model R4OOZ zero-

pressure regulator is used on propanefuelled engines.


4 THE GAS SYSTEM


THE GAS ELECTRICAL SYSTEM 5

5. THE GAS ELECTRICAL SYSTEM

CONTENTS

page5.1 Electronic Governor ........................................................................ 5.2

5.2 Magnetic Pick-up ............................................................................. 5.2

5.3 Primary Ignition System .................................................................. 5.2

5.4 Secondary Ignition System ............................................................. 5.3

5.5 Coils ................................................................................................ 5.3

5.6 High Tension Leads......................................................................... 5.3

5.7 Spark Plugs ..................................................................................... 5.4


5 THE GAS ELECTRICAL SYSTEM

5.1 The Electronic GovernorLPWG engines are fitted with the

Barber-Colman DYNA 2000 linear actuatorelectronic governor.

The electronic governor gives the fastresponse and precise control required ofa generating set engine.The system consists of:a. An actuator.b. Controller.c. Magnetic pick-up.

The actuator mounts to a bracket thatis sandwiched between the carburettor andthe inlet manifold.

The actuator plunger is attached to thecarburettor throttle lever by a linkage.

The actuator uses a sliding armature,the magnetic force of which is proportionalto the input coil current supplied by thecontroller. The actuator extends tomaximum throttle by application of thiscurrent, and is retracted to closed throttleby an internal spring.The actuator linkage geometry is criticalfor good governing. Under normaloperation the linkage should require noadjustment although it will be necessary ifreplacement parts are fitted.

The controller is mounted on a bracketattached to the left side of the flywheelhousing.

The controller circuit board is sealedin an aluminium housing and twopotentiometers are provided foradjustment of speed and gain.

The magnetic pick-up is threaded intothe flywheel housing immediately belowthe controller. The pick-up senses theflywheel gear ring teeth as the enginerotates, generating an AC voltage signalwhose frequency is proportional to enginespeed. This signal is the governorcontrollers speed reference signal.

5.2 The Magnetic Pick-upThe magnetic pick-up must generate

a minimum of 2.5 VAC while cranking, ifthe voltage is lower the controller will notenergize the actuator.

If the clearance between the end of thepick-up and the flywheel teeth is too great,the voltage signal generated will beinsufficient for operation of the electronicgovernor.

5.3 Primary Ignition SystemThe primary ignition system is battery

powered and the spark timing is fixed, withno provision for advance or retardadjustment.

The purpose of the primary ignitionsystem is to start and stop the flow ofbattery current through the ignition coil’sprimary windings.

The ground path for the primarywinding is provided through a Hall-effectmodule that switches on and off.The Hall-effect module performs the samefunction as a set of breaker points, withno moving parts.

When switched on, primary currentflows and the coil windings are saturatedby the magnetic field created.

When switched off, the ground path istaken away and the sudden cessation ofcurrent flow causes the magnetic field tocollapse, inducing a high voltage in the coilsecondary winding to fire the spark plug.

A magnet wheel is fitted to thecrankshaft pulley bolt and retained by twosetscrews.


THE GAS ELECTRICAL SYSTEM 55.4 Secondary Ignition System

The purpose of the secondary ignitionsystem is to develop the high voltagerequired to jump the spark plug gap in thecoil secondary windings, and deliver thisvoltage to the spark plug via the hightension leads. The coil boosts the normal12 volts battery potential to the 30000-40000 volts required to jump the spark pluggap.

Current flows through the primarywindings during the dwell period and thiscurrent flow establishes a magnetic fieldthat envelops the secondary windings.

When the dwell period ends andprimary current flow ceases, the rapidcollapse of this magnetic field induces ahigh voltage in the secondary windings.This high voltage is carried to the sparkplug through a conductor known as thehigh-tension lead.

CAUTIONThe installation of replacement ignitionsystem components not supplied by Lister-Petter may result in a reduction of availablespark energy, which can cause misfiringon the compression stroke. The unburnedfuel can then be ignited on the exhauststroke by the wasted spark, causing abackfire through the inlet manifold due tovalve overlap.

5.5 The CoilsNeither type of coil requires an external

primary resistance.LPWG2 and 4

These engines use a dual outlet coil.Each end of the secondary winding isconnected to a spark plug.

The spark plugs and high tension leadsmust be in good condition to form acomplete circuit. If one plug or lead is“open” electrically, neither plug will fire.

When one cylinder fires on itscompression stroke, the other fires on itsexhaust stroke.

LPWG3These engines use a single outlet coil,

one coil required for each cylinder.One end of the secondary winding is

connected to the spark plug, and the otherend is connected to the positive (+) sideof the primary winding, to form a completecircuit.

5.6 High Tension LeadsThe high-tension leads are 7mm

diameter and have a suppression core andEPDM covering.

LPWG4 engines use both 305mm and457mm (12.0 and 18.0in) leads,

LPWG2 and 3 engines use 305mm(12.0in) leads only.

Single outlet coils have a towerconfiguration different from the dual outletcoils, thus a different boot on the coil endof the lead is used.


5 THE GAS ELECTRICAL SYSTEM

5.7 The Spark PlugsIt is crucial to ensure that only

serviceable spark plugs are fitted in gasfuelled engines. If there is any sign ofmisfire, or damage to them, they shouldbe changed.

A misfiring engine will not produce fullrated power.

WARNINGAn oversize electrode gap may allow thespark to escape elsewhere in the ignitionsystem and damage other high tensioncomponents.

The spark plug specified for normalapplications is the Champion type RC9YC,with a gap of 0.50mm (0.020in). It isrecommended that these be replacedevery 500 hours for maximum reliability.

For long-run applications, whereextended spark plug life is desired, theChampion type RC78PYP with a gap of0.53mm (0.021in) can be used.

The RC78PYP has platinum centreand side electrodes and is designed as aheavy-duty industrial spark plug, whereasthe RC9YC is an automotive plug.


ROUTINE MAINTENANCE 6

6. ROUTINE MAINTENANCE

CONTENTS

page6.1 Oil and Filter Change Periods ......................................................... 6.2

6.2 Service Fill Oils ............................................................................... 6.2

6.3 Maintenance Schedule .................................................................... 6.3

6.4 Fault Finding ................................................................................... 6.4


6 ROUTINE MAINTENANCE

WARNINGRoutine maintenance must be performedby qualified persons who are conversantwith the hazards of fuels, electricity andmachinery.Read the Safety Precautions and observeall instructions and precautions in thispublication.

6.1 Oil and Filter Change Periods

WARNINGContact with used lubricating oil can causecancer, birth defects or other reproductiveharm.

CAUTIONAs a direct result of combustion thelubricating oil may contain harmful acidsand therefore it should not be left in thesump if it is known that the engine will notbe used for extended periods.

To help assist engine running-in, allengines are despatched with an initial fillof BP 7455 lubricating oil which must bechanged, with the filter, after 100 hours andthen as specified below. The first fill oil isformulated specifically for gaseous-fuelledengines.

Before attempting to change thelubricating oil or filter read "1.5.7 Oil andFilter Precautions".

After the first fill oil and filter change at100 hours, subsequent oil and filterchanges should be carried out every 250hours.

Any attempt to extend this intervalshould be in conjunction with a lubricatingoil analysis programme, to ensure that theTotal Acid Number (TAN) and nitrationlevels remain within acceptable limits.

WARNINGContinuous operation under heavy loadsin ambient temperatures above 35°C(95°F) causes the oil to deteriorate faster.Under these circumstances the oil and filtershould be changed every 125 hours.

6.2 Service Fill OilsThe engines should be serviced with:

� Mobil Pegasus 480 SAE40.� Mobil Delvac Super GEO 15W 40.� Or a similar type of gas engine

lubricating oil.If these oils are not available, a name

brand detergent lubricating oil specified forautomotive gasoline engines can be used.


ROUTINE MAINTENANCE 66.3 Maintenance Schedule

The maintenance schedule is basedon average operating conditions andcovers the minimum requirements to keepan engine running at peak performancewith trouble free operation.

Also refer to "6.1 Oil and Filter ChangePeriods"

WARNINGUNDER NO CIRCUMSTANCES SHOULDANY ATTEMPT BE MADE TO TEST ASPARK PLUG OR HIGH TENSION LEADBY REMOVING THEM FROM THEENGINE AND OPERATING THESTARTER MOTOR.

Daily

Check the coolant level.

Check the level and condi tion of thelubricating oil.Clean the air cleaner if the engine isoperating in very dusty conditions.

Every 125 Hours

The above and the following items.Clean the air cleaner if the engine isoperating in moderately dusty conditions.Check for coolant and lubricating oilleaks.Check the serviceability of the battery.

Every 250 Hours

The above and the following items.

Check the condition and tension of theradiator drive belt.Check the radiator fins for contaminationor blockage.Drain and replace the lubricating oil andfilter.Check the condition of the coolant hosesand clamps.

Every 500 Hours

The above and the following items.Clean the crankcase breather systemcomponents.Renew the air cleaner element.Check the air induction system for leaks,damage and restrictions.

Replace the spark plugs.

Clean the crankcase breather canisterand hoses

Every 1000 Hours

The above and the following items.Check all external nuts, bolts and unionsfor tightness.Ensure that all guards are firmly attachedand not damaged.Replace the high tension leads.

Every 2000 Hours

The above and the following items.

Overhaul the carburetor

C heck the eng ine contro ls for freemovement.Check the radiator fins and radiator fanblades for damage.Replace the radia to r fan drive be ltirrespective of condition.Check the lubricating oil pressure.

Renew the air cleaner element.

Every 6000 HoursThe previous items and give the enginea major overhaul, if necessary.

Every YearDrain, flush and refill the cooling systemadding new coolant concentrate to a 40%concentration.Drain and replace the lubricating oil andfilter, irrespective of their condition, if theengine has run for less than 250 hours inthe preceding twelve months.

Every Two YearsReplace the coolant hoses irrespective oftheir condition.


6 ROUTINE MAINTENANCE

Difficult StartingUnsuitable lubricating oil (too heavy).Incorrect gas specification.Low LPG level in the storage tank.Gas shut off valve not open.Spark plugs faulty, dirty or loose .Spark plug leads loose.Discharged battery.Poor battery connections.Battery cranking voltage too low.

Excessive Carbon DepositsChoked air filter.Choked exhaust system.Incorrect gas specification.Unsuitable lubricating oil.Continuous idling.

Engine StopsLow level of LPG in the storage tank.Choked air filter.Overload.Overheating.Loss of compression.Loss of electrical supply.Automatic shutdown, if protectivedevices are fitted.

Loss of PowerLoss of compression.Choked air filter.Choked exhaust system.Low level of LPG in the storage tank.Faulty spark plug or lead.Worn engine.

OverheatingRadiator fan belt too slack.Overload.Lubricating oil level too low.Radiator fan inlet obstructed.Reci rculation of exhaust gasses orcooling air.Radiator cooling fins blocked.Low level of coolant.Cooling system obstructed.

6.4 Fault FindingThis section is intended as a guide

only. If in difficulty refer to the WorkshopManual or consult any Lister-PetterDistributor or Dealer.

ISSUE CTOBER THE 'LPWG' SERIES OPERATORS HANDBOOK PETTER LPWG... · user should consult the local...

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Transcript of ISSUE CTOBER THE 'LPWG' SERIES OPERATORS HANDBOOK PETTER LPWG... · user should consult the local...