module descriptor - qqi...understanding of the working mechanisms of engines and tractors. the...

The Further Education and Training Awards Council (FETAC) was set up as a statutory body on 11 June 2001 by the Minister for Education and Science.

Under the Qualifications (Education & Training) Act, 1999, FETAC now has responsibility for making awards

previously made by NCVA.

Module Descriptor

Engines and Tractors

Level 6 C30120

www.fetac.ie

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1 Title Engines and Tractors 2 Code C30120 3 Level 6 4 Value 1 5 Purpose This module has been developed so that the learner will acquire an

understanding of the working mechanisms of engines and tractors. The learner will acquire skills to carry out a range of maintenance

tasks, associated with engines and tractors, safely and efficiently. This is a mandatory module on the Advanced Certificate in Greenkeeping Level 6 Award.

6 Preferred Entry Level Level 5 Certificate or equivalent.

7 Special Requirements None 8 General Aims

This module aims to enable the learner to: 8.1 understand the working mechanism of an engine 8.2 understand the working mechanism of a tractor 8.3 carry out routine servicing on engines and tractors

8.4 develop logical processes of fault-finding

8.5 appreciate that certain maintenance procedures require the expertise of a mechanic

8.6 appreciate the hazards associated with engines and tractors 8.7 develop safe working practices when operating engines and tractors.

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9 Units

Unit 1 Mechanical Unit 2 Electrical Unit 3 Tractor Components Unit 4 Hydraulics Unit 5 Power Take Off Mechanism Unit 6 Tyres and Wheels Unit 7 Health and Safety

10 Specific Learning Outcomes

Unit 1 Mechanical The learner should be able to: 10.1.1 explain the working sequence of a 2-stroke, 4-stroke and a diesel engine:

• induction • compression • power • exhaust

10.1.2 identify and locate the following internal working parts of an engine:

• pistons • piston ring • Connecting rod • crankshaft • valves • timing chain • oil pump • rocker

10.1.3 explain the relationship between the following working parts of an engine • pistons • crankshaft • timing chain/belt • camshaft • valves • distributor

10.1.4 explain the need for lubrication of an engine 10.1.5 list the types and applications of lubricants

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10.1.6 describe with the aid of a diagram, the following: • full flow lubrication system • splash lubrication system • 2 stroke lubrication

10.1.7 discuss the role of the following, in relation to lubrication system: • sump oil pump • oil filter • oil gallery • breather • Safety by-pass system • oil pressure gauge/warning light

10.1.8 state the procedures for servicing a lubrication system 10.1.9 service the lubrication system 10.1.10 state the causes of abnormal oil usage or pressure (high and low) e.g.

engine wear, over-filling, frequency, procedure 10.1.11 list the different types of fuels used for different types of engines 10.1.12 explain the functions of the main components of the fuel system of a

naturally aspirated engine, to include: • fuel tank • fuel pump • fuel filter • injector pump • injectors • carburettor • sediment bowl

10.1.13 identify and locate and of the main components specified in 10.1.11 10.1.14 carry out a routine service for the components specified in 10.1.11 10.1.15 replace a fuel pump 10.1.16 describe with the aid of diagrams the different types of carburettors:

• slide • diaphragm • float

10.1.17 list the applications of each type of carburettor 10.1.18 explain the function of a choke 10.1.19 explain why it is necessary to bleed a fuel system and how it is done 10.1.20 adjust the following:

• idle speed • air/fuel ratio

10.1.21 recognise the symptoms of rich and lean fuel mixtures 10.1.22 explain the need for filtering air intake and describe

• a dry air cleaner • an oil bath air cleaner

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10.1.23 explain the function of an engine governor and specify the throttle-governor relationship

10.1.24 explain the significance of the following in relation to engines:

• cubic capacity • engine power • torque

10.1.25 explain the functions of the main components of an engine cooling system: air cooled

• fin • fan • air ducts • cowl

water-cooled

• radiator • water jacket • water pump • thermostat • fan • fan belt • expansion tank • radiator cap • thermal sensors

10.1.26 identify and locate the components specified in 10.1.22 10.1.27 carry out routine maintenance on the components specified in 10.1.22 10.1.28 explain why a water-cooled system is pressurised 10.1.29 list the causes of abnormal temperature for a water-cooled system 10.1.30 replace a thermostat 10.1.31 replace a fan belt 10.1.32 replace a water pump 10.1.33 discuss the role of

• anti-freeze • corrosion inhibitors.

Unit 2 Electrical The learner should be able to: 10.2.1 explain the function of an electrical circuit 10.2.2 define the following terms and specify their unit of measurement

• voltage • current • resistance • power

10.2.3 draw and construct a variety of circuit diagrams, using the tractor frame as an earth return:

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e.g. lighting circuit, starter circuit, warning light/sensor circuit 10.2.4 discuss the role of circuit breakers in electrical circuits 10.2.5 explain the functions of the following components of an electrical ignition

system • distributor • coil • contact breaker points • magneto • spark plug • battery

10.2.6 identify and locate the components specified in 10.2.4 10.2.7 carry out a routine maintenance on an electrical ignition system 10.2.8 rectify routine ignition faults 10.2.9 carry out a battery maintenance procedure 10.2.10 discuss the advantages of a breakerless ignition system (i.e.

electronic ignition) 10.2.11 explain the functions of the following components

• dynamo/alternator • starter motor • starter solenoid

10.2.12 identify and locate the components specified in 10.2.10 10.2.13 adjust the belt tension for dynamo/alternator 10.2.14 replace alternator 10.2.15 replace starter motor 10.2.16 interpret warning lights and read gauges on consoles associated with

engines. Unit 3 Tractor Components The learner should be able to: 10.3.1 draw a block diagram of the layout of a tractor, to include:

• engine • clutch • gearbox • transmission • differential • final reduction • power take off

10.3.2 identify and locate the components specified in 10.3.1 10.3.3 explain the functions of a clutch and describe the following types:

• hand and foot operated • belt and tensioner • clatter clutch • dog clutch

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• disc type • centrifugal clutch • double clutch

10.3.4 list the applications of the different types of clutches specified in 10.3.3 10.3.5 describe how to adjust hand operated and pedal operated clutches 10.3.6 outline with the aid of a diagram the operation of a basic three speed and

reverse gear box 10.3.7 specify the service interval for a given gear box and the type of oil to be

used 10.3.8 outline the mechanism of hydrostatic transmission 10.3.9 explain the function of:

• crown wheel • differential • differential lock

10.3.10 discuss the effect on cornering when a differential lock is engaged 10.3.11 explain the necessity for final reduction gear 10.3.12 discuss the advantages of 4 wheel drive 10.3.13 describe the operation of disc type and drum type brakes 10.3.14 adjust and balance brakes 10.3.15 discuss the role of pedal locks. Unit 4 Hydraulics The learner should be able to: 10.4.1 explain the functions of the following:

• remote hydraulic cylinder • single acting ram • double acting ram

10.4.2 identify from a diagram of a basic tractor hydraulic lift system

• oil supply • pump • control valves • ramp piston • oil connections • oil circulation in "Lift", "Hold" and "Lower" links position to lift

arms 10.4.3 locate the features specified in 10.4.1 in a basic tractor hydraulic lift system 10.4.4 explain the operation of

• 3 point linkage • hydraulic lift

10.4.5 differentiate between category 1 and category 2 hitches 10.4.6 list the procedure for attaching an implement to 3 point linkage

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10.4.7 explain the following terms:

• Draught control • Position control • Weight transfer

10.4.8 discuss the potential dangers associated with high hydraulic pressures. Unit 5 Power Take Off The learner should be able to: 10.5.1 trace path of drive from flywheel to power take off point 10.5.2 discuss the role of the double clutch when using power driven attachments 10.5.3 specify the relevant power take off speed and the engine speed/PTO speed

relationship 10.5.4 list the dangers associated with the power take off shaft and how these can

be minimised 10.5.5 carry out a routine maintenance on a PTO 10.5.6 justify the reasons for standard speeds when using PTO. Unit 6 Tyres and Wheels The learner should be able to: 10.6.1 list the method of track alteration and state the associated benefits 10.6.2 interpret tyre size markings 10.6.3 outline the method of tyre construction 10.6.4 list the tyre pressures used for different operations 10.6.5 list the different tyre types and their uses e .g. agricultural use, turf use, road

use, flotation tyres 10.6.6 specify the relationship between tyre type, pressures, traction and flotation 10.6.7 list the causes of damage to tyres and their associated effects on wheel

alignment and pressures 10.6.8 discuss the role of tyres as the suspension system in tractors, as well as

being the means of utilising engine power for productive purposes 10.6.9 state the purpose of ballast and list the systems that are used 10.6.10 change a tractor wheel.

Unit 7 Health & Safety The learner should be able to:

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10.7.1 identify the adverse physical, chemical, biological and psychological effects of common hazards on the human body

10.7.2 recognise common hazard symbols and labels

10.7.3 know the rights and responsibilities of employers and employees as specified in the Safety, Health and Welfare at Work Act.

11 Assessment

Summary Practical Skill Tests Written Examination

11.1 Technique Practical Skill Tests Mode Centre-based with external moderation by FETAC.

Details A candidate must meet the performance criteria for each practical skill test as specified in section 12.

Components 16 practical skill tests related to the Specific Learning Outcomes shown in

brackets:

1. cut a putting greens using a pedestrian mower (10.1.7) 1 service the lubrication system (10.1.9) 2 carry out a routine service for the components of a fuel system (10.1.14) 3 Replace fuel pump (10.1.15) 4 carry out routine maintenance on the components of an engine cooling system (10.1.27) 5 Replace thermostat (10.1.30) 6 Replace fan belt (10.1.31) 7 Replace water pump (10.1.32) 8 carry out a routine maintenance on an electrical ignition system (10.2.7) 9 rectify routine ignition faults (10.2.8) 10 carry out a battery maintenance procedure (10.2.9) 11 adjust the belt tension for an alternator (10.2.10) 12 Replace alternator (10.2.14) 13 Replace starter motor (10.2.15) 14 adjust and balance brakes of a tractor (10.3.14) 15 carry out a routine maintenance on a PTO (10.5.5)

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16 change a tractor wheel (10.6.10)

11.2 Technique Written Examination Mode Centre based with external moderation by FETAC Format The examination will consist of 4 papers Duration 1 hour per paper Details Each paper will focus on particular units as follows:

paper units questions 1 1 20 2 2 20 3 3 20 4 4,5,6 20

All questions on each paper carry equal marks. All questions must be attempted.

12 Performance Criteria 12.1 Portfolio of Coursework The performance criteria for each practical skill test are detailed in the

accompanying Individual Candidate Marking Sheets C30120/MS1 - C30120/MS16.

12.2 Written Examination A detailed marking scheme with the examination paper should be submitted

to FETAC for approval. 13 Grading Pass 50 - 64%

Merit 65 - 79%

Distinction 80 - 100%

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C30120/MS1

Individual Candidate

Marking Sheet


(C30120)

Practical Skills Test #1:

service the lubrication system Candidate: _____________________________________ PPSN: _______________

Performance Criteria Tick (ü) as appropriate

select and wear appropriate personal protective equipment ensure engine oil is warm put waste oil receptacle in place correctly drain oil correctly remove filter correctly fit new filter and seals correctly replace oil bung correctly fill correctly with recommended quantity of oil run engine correctly for a few minutes stop engine, check for leaks allow oil to settle check dispstick level and top up correctly if necessary safety and health maintained throughout Assessor's Signature: ____________________________________ Date: _____________

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External Authenticator's Signature: __________________________ Date: _____________

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C30120/MS2


Marking Sheet


(C30120)


carry out a routine service for the components of a fuel system

Candidate: _____________________________________ PPSN: _______________


select and wear appropriate personal protective equipment select appropriate equipment correctly turn off fuel supply correctly remove fuel filter(s) correctly clean sediment bowl correctly replace primary filter correctly with secondary fit new filter in secondary correctly, renewing seals at all stages turn on fuel supply bleed air from system correctly safety and health maintained throughout equipment maintained correctly throughout Assessor's Signature: ____________________________________ Date: _____________ External Authenticator's Signature: __________________________ Date: _____________

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C30120/MS3


Marking Sheet


(C30120)


Replace fuel pump Candidate: _____________________________________ PPSN: _______________


select and wear appropriate personal protective equipment

select correct tools

turn off fuel supply correctly

locate fuel pump correctly

remove fuel pump correctly

remove fuel pump gasket correctly

fit new pump correctly, ensuring lock washers are in position

safety and health maintained throughout

Assessor's Signature: ____________________________________ Date: _____________ External Authenticator's Signature: __________________________ Date: _____________

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C30120/MS4


Marking Sheet


(C30120)


carry out routine maintenance on the components of an engine cooling system

Candidate: _____________________________________ PPSN: _______________



select appropriate tools correctly

Air cooled engine

• clean air intake correctly

• remove cowls from engine correctly

• clean fins correctly

• re-assemble correctly

Water cooled engine

• clean radiator fins correctly

• check water hoses for wear correctly

• drain coolant correctly

• flush system correctly

• fill system with correct mixture

• run engine correctly

• checks coolant levels correctly


Assessor's Signature: ____________________________________ Date: _____________

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16

C30120/MS5


Marking Sheet


(C30120)


Replace thermostat Candidate: _____________________________________ PPSN: _______________




remove thermostat housing, gasket and thermostat correctly

fit new thermostat and gasket correctly

re-assemble correctly, ensuring lock washers are in place



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C30120/MS6


Marking Sheet


(C30120)

Practical Skills Test #6: Replace fan belt

Candidate: _____________________________________ PPSN: _______________




slacken alternator bracket correctly

remove fan belt

fit new fan belt correctly

lever alternator bracket correctly until belt is at correct tension

tighten alternator bracket correctly

check that fan belt tension is correct and re-adjust if necessary



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C30120/MS7


Marking Sheet


(C30120)


Replace water pump Candidate: _____________________________________ PPSN: _______________




put receptacle under pump

slacken hoses at pump correctly

allow coolant to drain correctly into receptacle

remove hoses and water pump correctly

remove old gasket correctly

fir new gasket and pump correctly

replace hoses correctly

refill system correctly with coolant

run engine and check correctly for leaks



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C30120/MS8


Marking Sheet


(C30120)


carry out a routine maintenance on an electrical ignition system

Candidate: _____________________________________ PPSN: _______________


select and wear appropriate personal protective equipment select appropriate tools correctly remove spark plugs correctly adjust gap on spark plugs correctly fit new plugs or refit old plugs if serviceable correctly remove distributor cap correctly clean rotor contact points correctly remove points correctly fit new points correctly set gap correctly replace distributor cap correctly start engine correctly and check operation safety and health maintained throughout Assessor's Signature: ____________________________________ Date: _____________

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21

C30120/MS9


Marking Sheet


(C30120)


rectify routine ignition faults Candidate: _____________________________________ PPSN: _______________




check plug for spark

if no spark is present, clean plug, adjust gap and replace correctly

if still no spark, remove plug(s) and rotate engine by hand correctly, observing to see if points open and close correctly

if points operate correctly, check for fault in coil/plug lead or distributor cap



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C30120/MS10


Marking Sheet


(C30120)


carry out a battery maintenance procedure Candidate: _____________________________________ PPSN: _______________




clean battery case correctly

remove battery pole connectors correctly

clean battery poles and connectors correctly

re-tighten connectors correctly

smear terminals with petroleum jelly correctly

check electrolytic level and top up with distilled water correctly, if necessary



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C30120/MS11


Marking Sheet


(C30120)


adjust the belt tension for an alternator Candidate: _____________________________________ PPSN: _______________




slacken nut on alternator arc bracket correctly

lever alternator correctly till belt is at correct tension

re-tighten nut correctly

check belt tension correctly (approx. 10-15 mm movement on longest run)



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C30120/MS12


Marking Sheet


(C30120)


Replace alternator Candidate: _____________________________________ PPSN: _______________




disconnect battery correctly

disconnect leads to alternator correctly

slacken alternator correctly

remove fan belt correctly

remove alternator correctly

fit new alternator correctly

refit belt and adjust tension correctly

reconnect leads to alternator correctly

reconnect battery leads correctly

safety and health maintained throughout Assessor's Signature: ____________________________________ Date: _____________

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C30120/MS13


Marking Sheet


(C30120)


Replace starter motor Candidate: _____________________________________ PPSN: _______________




disconnect battery correctly

remove leads from battery correctly

remove starter correctly

fit new starter correctly

reconnect leads to starter correctly

reconnect battery correctly



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C30120/MS14


Marking Sheet


(C30120)


adjust and balance brakes of a tractor Candidate: _____________________________________ PPSN: _______________




bring shoes in contact with drum correctly, using brake adjusters

slacken adjusters off correctly, till wheels turn without fouling shoes

check which brake pedal is lowest when brakes are engaged

bring the lower pedal up to be level with the other pedal correctly, using the brake rod adjuster

road test tractor correctly



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C30120/MS15


Marking Sheet


(C30120)


carry out a routine maintenance on a PTO Candidate: _____________________________________ PPSN: _______________




check (off the machine) that safety cowl is not damaged

check that restraining chains are secure

grease universal joints correctly

lubricate lock pins correctly

fit shaft to tractor correctly

implement and observe operation correctly



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C30120/MS16


Marking Sheet


(C30120)


change a tractor wheel Candidate: _____________________________________ PPSN.: _______________


to be undertaken by two persons



ensure hand brake is engaged correctly

slacken hub nuts correctly

jack up tractor correctly till wheel is well clear of ground

lower tractor on to axle stand correctly

remove wheel correctly

roll replacement wheel into position correctly

lever replacement wheel onto studs correctly

replace and tighten hub nuts correctly

remove stand and jack correctly

check nuts for tightness



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C30120/MS17

National Council for

Vocational Awards

Practical skill tests summary sheet


(C30120)

Centre:______________________________________________________________________ Centre no.: ___________________

Candidate Practical Skill Tests (Please tick (ü) on completion of each one

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Assessor's signature:_______________________________________________________________________ Date:_____________________

External Authenticator's signature:_____________________________________________________________ Date:_____________________

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C30120/MS18

Individual Candidate Marking Sheet


(C30120)

Written Examination

Candidate: ______________________________________ PPSN: ____________

Performance Criteria Maximum Mark

Candidate Mark

Paper 1 200

Paper 2 200

Paper 3 200

Paper 4 200

TOTAL 800

PERCENTAGE TOTAL (=TOTAL /8) 100%

Assessor's Signature: _____________________________________ Date: ______________ External Authenticator's Signature: __________________________ Date: ______________

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National Council for Vocational Awards

Rank Order Form

(Candidate results to be entered in descending order of total marks)


(C30120)

Sheet number _______ of _______ Centre:___________________________________________________________________ Centre no:______________________ RANK

Candidate

PPSN Competent in all

16 Practical Skills

Written

Examination

Grade Pass=50%

Merit=65% Dist.=80%

Moderated

Mark/Grade

FETAC use only

tick (ü) (100%)

Assessor's signature:_______________________________________________________________________ Date:_____________________

Principal's/Director's signature:___________________________________________________________ Date:_____________________

External Authenticator's signature:____________________________________________________________ Date:_____________________

module descriptor - qqi...understanding of the working mechanisms of engines and tractors. the...

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