TLIC607D - Drive Multi Combination Vehicle - Learner Guide

8/14/2019 TLIC607D - Drive Multi Combination Vehicle - Learner Guide

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TLIC607D Drive

multi combination

vehicle

Learner Guide


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Contents

What this Learners Guide is about........................................ 3Planning your learning ........................................................... 4How you will be assessed...................................................... 7

Section 1............................................................................................. 9How are multi-combination vehicles correctly driven underlicense testing conditions? ..................................................... 9

Section 2........................................................................................... 33How are trailers of multi-combination vehicles coupled anduncoupled under license testing conditions? ....................... 33

Feedback on activities .................................................................... 37


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TLIC607D Drive multi-combination vehicle

Page 2 Australian National Training Authority 2003ADELG1029 Customised and Developed by Armstrongs Driver Education P/L May 2008


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Australian National Training Authority 2003 Page 3Customised and Developed by Armstrongs Driver Education P/L May 2008 ADELG1029

What this Learners Guide is about

ThisLearnersGuideisabouttheskillsandknowledgerequiredtoeffectivelydrivemulti-combinationvehiclessafely,includingsystematicandefficientcontrolofallvehiclefunctions,couplinganduncouplingofdolliesandtrailersandeffectivemanagementofhazardoussituations.Theactivitiesaredesignedtogiveyouanopportunitytopractiseanddemonstrateyourskillsandknowledge.Thelearningguidealsodescribescommunicationfunctionsofonboardcomputersystems.

TheElementsofCompetencyfromtheunitTLIC607DDrivemulti-combinationvehiclecoveredinthisLearnersGuidearelistedbelow.

Driveamulti-combinationvehicle

Monitortrafficandroadconditions

Monitorandmaintainvehicleperformance

ThisunitofcompetencyisfromtheTransportandLogisticsTrainingPackage(TLI07).


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Planning your learning

ItisimportanttoplanyourlearningbeforeyoustartbecauseyoumayalreadyhavesomeoftheknowledgeandskillsthatarecoveredinthisLearnersGuide.Thismightbebecause:

youhavebeenworkingintheindustryforsometime,and/or

youhavealreadycompletedtraininginthisarea.

Togetherwithyoursupervisorortrainerusethechecklistsonthefollowingpagestohelpyouplanyourstudyprogram.Youranswerstothequestionsinthechecklistwillhelpyouworkoutwhichsectionsof

thisLearnersGuideyouneedtocomplete.

ThisLearnersGuideiswrittenwiththeideathatlearningismademorerelevantwhenyou,thelearner,areactuallyworkingintheindustry.Thismeansthatyouwillhavepeoplewithintheenterprisewhocanshowyouthings,discusshowthingsaredoneandansweranyquestionsyouhave.Alsoyoucanpractisewhatyoulearnandseehowwhatyoulearnisappliedintheenterprise.

IfyouareworkingthroughthisLearnersGuideandhavenotyetfoundajobintheindustry,youwillneedtotalktoyourtraineraboutdoingworkexperienceorworkingandlearninginsomesortofsimulatedworkplace.


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Section 1: How are mutli-combination vehiclescorrectly driven under licence testingconditions?

Areyouableto: Yes No

1. completeapre-departurevehiclecheck?

2. starttheengineandundertakepost-startupchecks?

3. secureorconfirmthesecurityoftheloadbeingtransportedonamulti-combinationvehicle?

4. steer,manoeuvreandpositionthevehicleinaccordancewithtrafficregulations,vehiclelimitationsandroaddimensions?

5. drivethevehicleinreverse,maintainingvisibilityandachievingaccuratepositioning,especiallyofthetrailer?

6. manageenginepowertoensureefficiencyinperformanceandminimiseengineandgeardamage?

7. monitorthevehicleformalfunctionsandtoensuremaximumefficiencyofoperation?

8. monitorandanticipatetrafficandroadconditionstoavoidinjurytopeopleordamagetoproperty,equipmentandloads?

9. stopthevehiclewithoutinjurytopersonnelordamagetothevehicle,propertyorland?

10.park,shutdownandsecurethevehiclein

accordancewithmanufacturersspecifications,trafficregulations andcompanyprocedures?


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Section 2: How are multi-combination vehiclescoupled and uncoupled under licencetesting conditions?

Areyouableto: Yes No

1. coupleaprimemovertoatrailer,thentrailertotrailer,inaccordancewithmanufacturersspecifications?

2. checkthattrailersaresecurelycoupledtotheprimemoverandeachotherandarefullyoperational?

3. uncoupleaprimemoverfromatrailer,andtrailerfromtrailer,inaccordancewithmanufacturersspecifications?

4. checkthattrailersaresafelyuncoupledformtheprimemoverandeachotherandarestableandsecured?


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How you will be assessed

AssessmentofthisUnitofCompetencywillincludeobservationofrealorsimulatedworkprocessesusingworkplaceproceduresandquestioningonunderpinningknowledgeandskills.Itmustbedemonstratedinanactualorsimulatedworksituationundersupervision.

Youwillberequiredtosafely:

undertakerequiredpre-departurechecks

coupleanduncoupletrailers

secureloads

drivemulti-combinationvehiclesinavarietyofroad,weatherandroadconditions

parkandsecuremulti-combinationvehicles.


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Section 1

How are multi-combinationvehicles correctly driven underlicense testing conditions?


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Section outline

Areascoveredinthissection

Pre-departurechecks

Securingloads

Selectingandchanginggears

Drivingamulti-combinationvehicle,invariousroad,weatherandtaskconditions

Manoeuvringtrailers,usingreversegears

Parkingandsecuringmulti-combinationvehicles


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Pre-DepartureChecks

Thissub-sectionmayalsobeasimplerevisionexercise.However,itisnolessimportantthanpreviously,evenifyouhavebecomean

experiencedrigidvehicledriver.

Youmayhavealreadycompletedthisactivityforarticulatedvehicles.However,itisvitalandshouldbeundertakenforarticulatedvehicles.

Driversofmulti-combinationvehiclesmustcompletefullpre-departurechecksbeforemovingoffinthosevehicles.Yourcompanywillhaveapolicyonthechecksyoumustundertakebeforeyoudriveavehicle.Thesetaskswillvaryfromcompanytocompany,accordingtohowmuchresponsibilityyourcompanygivesyoutochecktheserviceabilityoftheirmulti-combinationvehicles.


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Activity 1: What procedures are required to complete apre-departure check?

You are required to identify and check the serviceability of a multi-combination vehicle.

Before you start this activity, look at the following checklist anddiscuss any details you are unsure of with your trainer. Then usethe checklist to tick off the successfully completed tasks when youhave finished the activity.

Sub-tasks Steps Completed

1. Completeprimemoverchecks

Under Bonnet

Check all fluid levels

Check tension and wear of drive belts

In Cab before Start

Ensure parking brake is on

Check the readings on all gauges

In Cab after Start

Start engine according to manufacturersinstructions

Check readings on all gauges

Check operation of windscreen washers andwipers

Check the following are operating correctly:

service brakes

warning horn

Adjust seat to personal requirements

Adjust mirrors to give adequate vision

Check registration, licence andpermits/gazettes and associated requirements

Outside Cab

Systematically check all of the following:

tyres for inflation and wear


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wheels for damage

tightness of wheel nuts and wedges

indicator lights

headlights (high/low beam)

park lights

hazard lights

clearance lights

plates and signs (present and visible)

windscreen cleanliness

oil leaks

exhaust leaks

vehicle posture

wheel guards and mud flaps

Service the Air Wet Tank

The following steps relating to trailercoupling checks must be completed as partof the activities you undertake in Section 3of this Learning Guide.

2. CheckTrailer Acoupling

Check the turntable and jaws for:

lubrication, if applicable

damage or wear

release lever and jaws locked

Check King Pin and skid plate for damage orwear.

Check air hoses for:

leaks or damage

coupling and support

shut off valve open

Confirm that the ABS connector plug iscorrectly fitted

Check electrical leads, plugs and connections


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B-DOUBLE TRAILER B

Coupling Equipment B Trailer

Check the turntable and jaws for:

lubrication

damage or wear

release lever and jaws locked

Check King Pin and skid plate for damage orwear

Check air hoses for:

leaks or damage

coupling and support

shut off valve open

Confirm that the ABS connector plug wascorrectly fitted

Check electrical leads, plugs and connections

5. Checkoperationalstatus ofTrailer B

Systematically check all of the following:

clearance lamps are operating

spare wheel present

spare wheel carrier

body and chassis for damage

tyres for inflation or wear

wheels for damage

tightness of wheel nuts and wedge

wheel guard and mud flaps fordamage

wheel guard and mud flaps fordamage

Service wet air tank

Check vehicle posture

Check the load for security and confirm thecompatibility of its components


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Check visibility of brake, indicator and tail lights

Check presence and legibility of plates and

signs

6. Record andreportresults ofPre-Departurecheck

Complete the Pre-Departure Check sheetaccording to company policy and standards

Take corrective action on those matters whichare prescribed by company policy as thedrivers responsibility

Report all other faults to the appropriatecompany personnel so that corrective actionmay be taken

7. Observe allOH&Sprocedures

Observe all Occupational Health and Safetymeasures while conducting the Pre-Departurecheck


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SecuringaLoad

Thedriverandthepersonloadingamulti-combinationvehicleare

responsibletomakesuretheloadisproperlyrestrainedbythevehicleandtrailerstructures,theirattachmentsandtheloadsecuringequipment.Thedriver,thevehicleownerandthepersonloadingamulti-combinationvehicleareresponsibletomakesureeachoftheseisserviceableandworkingproperly.

Thesethreepeoplemustalsomakesurethatthevehicleandtrailerstructures,theirattachmentsandtheloadsecuringequipmentarestrongenoughtoholdandsecuretheload.

Inallloadingactivities,youshouldrefertotheLoadRestraintGuide.Thatdocumentshowsyouallthemethodsandrequirementsofload

securing,soyoushouldkeepacopyofitwithyouatalltimes.


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Activity 2: How are loads secured on multi-combinationvehicles?

Answer the following questions on securing loads by tickingCorrect or Incorrect and giving a reason for your answer.

Study the 4 diagrams below and indicate whether they arecorrectly or incorrectly loaded:

Correct

Incorrect

Why_____________________

Correct

Incorrect

Why_____________________

Correct

Incorrect

Why_____________________

Correct

Incorrect

Why_____________________


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List the 3 areas of driver responsibility for loading a vehicle.

1. _________________________________________________

2. _________________________________________________

3. _________________________________________________

List the 3 factors necessary to secure a load.

1. _________________________________________________

2. _________________________________________________

3. _________________________________________________

There is feedback on this activity at the back of this LearnersGuide.


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LoadingDOsandDONTs

Thereareanumberofmethodstoproperlysecureloads,justastherearesomepracticeswhichmustneverbeused.YouwillproperlysecureloadsifyoualwaysfollowthislistofDOsandDONTs:

DO:

makesureyouhaveenoughlashingsthatareingoodconditionandstrongenoughtosecuretheload

makesurethattie-downlashingsareasneartoverticalaspossible

makesurethatdirectlashingsattachedtoloadsonwheelsarenotnearvertical

attachlashingsattierailsupportpoints

checkandre-tightenthelashingsandotherrestrainingdevicesasrequired

uselashingprotectorsonsharpedges

usewedgesandchockstoblockyourload

makesurethatloosebulkloadscannotfallorbeblownoffthevehicle

useavehiclethatisbuiltstronglyenoughforthejob

takeextremecarewhenreleasinganyfixedleverload-binder.

DONT:

usefaultyequipment

attachchainsorwebbingbetweentierailsupportpoints

tiedownloadsontogreasyordirtysteeldecks

standoverandpushdownonload-binders.


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Activity 3: Which loading and unloading methods are usedwhen securing multi-combination vehicle loads?

Your trainer will provide you with a multi-combination vehicle toload and unload in this activity. If you are unsure of what you arerequired to do, you must seek assistance and/or use the LoadRestraint Guide.

Read all of the steps in the following table that you are required todo before you start this activity.

After loading is completed, ask your trainer to check your work tomake sure that all items have been correctly loaded, and are safeto be unloaded.


1. Identify loadcharacteristics

Check that the tray area is suitable for theload, with adequate space and capacity

Assess the load for its transportability bychecking load markings and documentation

Check the load for Dangerous Goodscontents

Check the load components to ensure theircompatibility for transportation.

2. Identify loadlimits andsafetyrequirements

Calculate the appropriate loading sequencefor the journey, to facilitate unloading

Choose appropriate and adequate restraintsfor the task

Check that appropriate and adequate safetyequipment is securely stowed in the correct

locations on the vehicle

Confirm that the loaded vehicle will notexceed legal axle load limits, (both GVM andGCM)

Confirm that Road Transport ReformRegulations will not be exceeded

Check that the dimensions of the loadedvehicle will not exceed road safety limits forthe journey (length, width and height)

Obtain permit for the load, if required.


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3. Plan loading ofthe vehicle

Assess whether the load can be handledmanually and locate appropriate mechanicallifting aids if required

Ensure the stability of the vehicle bychecking that the vehicle can be loaded withthe centre of gravity of the load as low aspossible and along the centre line of thevehicle

Ensure that the tyres will not be overloaded

Check that the vehicle can be loaded so thatthe loads centre of mass is forward of therear axle group

Check that tie rails and anchor points are

undamaged, and the restraining equipmentwill not cause damage by chafing, crushingand over-tensioning as the load is secured

Check that pallets are of sufficient strengthfor the load

Check for damaged or leaking containers

Confirm the serviceability of load-coveringequipment, for protection in adverse weatherconditions.

4. Load thevehicle inaccordancewith the LoadRestraintGuide

Ensure that no apparent danger is present toother personnel (including all members of thepublic)

Apply the park brake, then ensure the engineis switched off if not required during theloading process

Safely position the load on the vehiclescarrying surface *

Ensure chafing and crushing of load items isavoided

Ensure sufficient friction between the loadand the vehicles carrying surface

Load pallets along the length of the vehicle

Install baulking / packing to pallets that arenot loaded close together to optimise correctload placement

Ensure all necessary signs and flags aresuitably placed for overhanging or over-

dimensional loads


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Operate mechanical loading securingequipment (where appropriate) by:

checking unit load device placements

confirming covering / restraining processis complete.

* (Use of other mechanical lifting aids isprescribed in other Learners Guides specificto that equipment.)

5. Secure theload

Ensure that lashings are tied at angles of atleast 30 to the vehicle loading surface (as

defined in the Load Restraint Guide)

Ensure that vertical movement and tipping of

the load is not possible, by placing restraintsacross the top of the load

Ensure against forward and rearwardmovement of the load, by restraining (withbaulking and lashing equipment) inaccordance with the Load Restraint Guide

Ensure against forward and rearwardmovement of the load, by passing restraintsthrough the base of the pallets (wherepossible)

Ensure that the top of each separate sectionof the load has at least one cross-lashing

Ensure that any part of the load which isabove the general height of the load has atleast two cross-lashings

Restrain the load horizontally using chocks orvertical restraints where necessary

Confirm that all ties (ropes, chains, straps,buckles, etc), are correctly tied, installed andsecured, as applicable

Ensure all gates and/or doors are correctlymounted and secured as appropriate

Fully engage all twist locks.

6. Cover the load Use appropriate materials to cover the load,ensuring load movement does not occur

Adequately secure the covering materials,ensuring protection against adverse weatherconditions or spillages in the container


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Avoid damage to covering materials causedby chafing

Ensure any loose surfaces (packaging, ties,tarpaulin and curtain flaps, etc), are securedagainst movement during transit.

7. Unload thevehicle inaccordancewith the LoadRestraint Guide

Park and secure the vehicle in a suitableposition for unloading, ensuring protection forall personnel, materials and equipment

Apply the park brake and switch off theengine

Remove load covers (where necessary) andstow safely

Safely release load restraints and stow safely

Calculate the unloading sequence and theset-down points for each item

Unload the vehicle in the pre-determinedsequence, transferring each item to its safelocation. *

* (Use of mechanical lifting aids is prescribed inother Learners Guides specific to that equipment.)

8. Observe OHS

practices

Observe and implement Occupational Health

and Safety practices, during all tasks in theloading and unloading processes, especiallyconsidering other workers, and bulk grain,livestock and liquid loads.

When you have marked all the steps as complete, discuss withyour trainer any areas of your work that require improvement tomake sure loads are secure and safe.


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Braking

Heavyvehicleswillbemoredifficulttostopunderbraking,dependingontheirsizeandtheirload.Roadandweatherconditionsaffectbrakingperformance.Thespeedofvehicleswillalsoaffectbrakingperformance,aswillthetimetakenbydriverstoreacttotheneedforbraking.Youmustconsiderallthesefactorswhendriving,especiallyasthelossofvehiclecontrol(skidding)isbothdangerousandfrequent.Forexample,theheavierthevehicle,thewettertheroad,thefasterthespeed,themoretiredthedriverandtheharderthebraking,themorelikelyskiddingwilloccur.

Asaprofessionaldriverofamulti-combinationvehicle,youwillbeawareofthedangerposedbyyourvehicleshouldyoulosecontrolofitsspeedordirection.Thefollowingbrakingrulesmustbeappliedat

alltimes:

brakeearlyandgradually

brakeinastraightline

recognisethedifferencebetweenABSandconventionalbrakingsystems

allowforthetrailersandtheirownbrakingsystems

allowfortheloads

matchyourbrakingtotheroadsurface

easeoffasthevehicleslows

testyourbrakesafterdrivingthroughwater.

Downhillspeedshouldbecontrolledbyuseofenginespeedandcorrectgearselection.Ifbrakingisnecessaryduringadescent,adrivershould,ifpossible,trytobrakeonlywhenthevehicleistravellingina

straightline.Brakingonabendincreasestheriskofskiddingandshouldusuallyonlybeusedinanemergency.Ifbrakingmustbeappliedonabend,itshouldbedoneasgentlyaspossible.

Drivinginreverse

Drivingmulti-combinationvehiclesinreverserequiresspecificskillsandisextremelydifficult,duemostlytothevehicleshavingmorethanoneindependenttrailer.However,reversingmaybetheonlywaytomanoeuvrethevehicleinloadingandunloadingareas,especiallyfor

livestock.


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However,manycircumstanceswheremulti-combinationvehiclesarereversedrelatetothecoupling,uncouplingandpositioningoftrailers.Reversingskillswillonlybeattainedafterconsiderablepractise,withcounterturnsonsteeringwheelsandthetrailershavingmindsoftheirownoftencausingdifficulty.Theabilitytoavoidtrailerjack-

knifing,especiallyoverrelativelylongerreversingdistances,willbethekeytomanyofyourdrivingtasks.

Professionaldriving

Mostroaduserswillbenon-professionaldriverswhohavenotreceivedasmuchtrainingasdriversofmulti-combinationorothercommercialvehicles.Professionaldriversarecourteousanddriveinadefensivemanner.DrivinginsuchamannerwillencourageamoretolerantattitudetowardstheRoadTransportIndustryandpeople

employedinit.Youwillhopefullyhavehelpedtoachievesomeofthistoleranceduringyourpreviousdrivingexperiences.

Adefensivedriveravoidscausingaccidentsandalsoavoidsbecominginvolvedinaccidentscausedbyotherroadusers.Defensivedriversknowandobservethelawsandregulationsrelatingtotheroad,thevehiclestheydriveandthegoodstheytransport.Thedefensivedriverispreparedtogivewaytoavoidthepossibilityofanaccident,evenifbylaw,theotherroaduserisatfault.

Defensivedrivingrequiressuperiorobservationandanticipationskills.

Driverswillneedtoknowwhatishappeningallaroundtheirvehicle.Theskillsneededfordefensivedrivinginclude:

continuouslyobserveallsituations,includinglookingasfaraheadaspossible

maintainingsafespacecushions

remainingcontinuouslyawareofthesizeofmulti-combinationvehicles

frequentlycheckingmirrors

slowingdowntonegotiatealldrivingsituations

selectingthemostappropriategearsforeachdrivingtask

tryingtoanticipatepossibledangers

acknowledgingthatotherroadusersareoftenintimidatedbymulti-combinationvehicles

usingappropriatespeeds,turningandstoppingtechniques,andwarningdevicestonegotiateandleavehazardoussituations.


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Activity 5: Which procedures are used to professionally drivemutli-combination vehicles?

During this activity, any deliberate or accidental failure to observeRoad Rules will immediately cause the activityto be terminated.In these circumstances, your trainer will not be able to assess youas a competent driver.

Where possible, the activity may be varied to cater for drivingduring anyworking hours, weather and road conditions. ForEmergency situations that obviously cannot be created, yourtrainer will check your performance by seeking descriptions ofrequired actions and/or simulation exercises.


1. Complete aPre-DepartureCheck

Complete checks as outlined in sub-tasks 1,3 and 5 of Activity 1.

2. Comply withall traffic lawsandregulation

Confirm that application of the engine brakeis permitted for locality of this activity.

3. Plan the route Describe the routes available, within theareas serviced, which are approved for theparticular type of vehicle.

Use a road map and/or street directory toconfirm adherence to gazette/permitapproved routes.

4. Check theload

Check that the load is correctly distributedover the axles.

Check that all lasing and baulking materialsare correctly utilised.

Check that the load is covered and thatcovers are secure.

Ensure covers will shed water away from theload and deflect head wind effect.

Ensure that all loops and rope ends aresecured.

5. Steer the

vehicle

Hold the steering wheel in the upper half of

the wheel, with hands spaced appropriately.


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Maintain control of the vehicle

Avoid steering movements with apply/place

excessive sideways force on the vehicle andits load.

6. Applydefensivedrivingtechniques

At appropriate intersections, describe theapplication of the steps of system driving, aseach is carried out:

course driving path selection

use of mirrors

use of indicators and other signals

speed adjustment and braking

gear selection

repeated use of mirrors

taking of evasive actions.

Maintain a safe space cushion around thevehicle.

Apply and describe the six steps of systemdriving.

7. Change gears Disengage and engage the transmissionclutch smoothly.

Maintain torque by selecting appropriategears.

Change gears within manufacturersspecification.

Apply progressive gear shifting:

prior to turning a corner

ascending a hill

prior to descending a hill.

Skip shift gears where appropriate.

8. Readinstrumentsand gauges

During a series of periodic checks, describethe reading of:

road speed

RPM


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oil pressure

coolant temperature.

9. Negotiatecorners andcurves

Position the vehicle correctly to negotiate leftand right hand curves.

Select the required gear prior to entering asharp corner.

Travel in the correct line to decreasesideways force.

Choose speeds appropriate to varying roadcambers.

Avoid braking in a corner or curve, unless inan emergency situation.

Use signals as required.

Use mirrors to check cut-in of trailers and themovement of other traffic.

Describe the variations in cut-in with trailersof different length.

10. Start on a hill Stop the vehicle on the upgrade withoutrolling back.

Position the vehicle to comply with trafficregulations.

Use mirrors to assess traffic conditions.

Start the vehicle on the upgrade withoutrolling back.

Select gear ratio to achieve smooth take-off.

Select gears to maintain specified engine

torque.

11. Drive thevehicle on adescendinggrade

Decrease speed to below that required toengage the gear necessary for the descent.

Engage required gear prior to commencingdecent.

Select a gear appropriate for the load weight.

Use speed retarders during the descent.

Use brakes only for emergencies or

unexpected conditions.


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12. Complete astraight linestop

Plan the stopping procedure to utilise dragfrom the trailers and aid vehicle deceleration.

Brake early and gradually.

Maintain a straight line.

Allow for the load.

Match braking with road surface.

Match braking with traffic and roadconditions.

Ease of as vehicle slows.

Test brakes after passing through deepwater.

13. Reverse thevehicle in theyard

Check for hazards and obstructions in front,behind and above the vehicle.

Check that mirrors are clean and adjusted tofacilitate maximum views.

Use mirrors to maintain visibility behind andbeside the vehicle.

Use horn or warning device to indicatevehicle is about to reverse.

Choose the maximum available space tocomplete the reversing task.

Avoid accidents by reviewing the reversepath before proceeding.

Initiate trailers path direction correctly, thenadjust the Prime Mover to achieve its correctpath, avoiding tyre sledging if possible.

Reverse into required position, stoppingwhen safely aligned to loading/unloadingareas.

Take correct actions on time and with safety.

14. Park and shutdown thevehicle

Park the vehicle in a location approved bythe company policy or Road Law, and applyall park brakes.

Confirm that the engine has had an adequateperiod to cool down, especially for the turbo-charger, then switch off engine.


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Chock the vehicle wheels as appropriate for

the selected location, and check vehicle andload status according to company policy.

15. Observe OHSpractices

Observe and implement Occupational Healthand Safety practices when driving a multi-combination vehicle.


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Section 2

How are trailers of multi-combination vehicles coupledand uncoupled under licensetesting conditions?


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Section outline

Areascoveredinthissection

Couplingtrailers

Uncouplingtrailers


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Couplinganduncouplingtrailers

Thesafetyandsecurityofcouplingtrailerstoprimemoversorotherrigidvehiclesiscritical.Therefore,theserviceabilityofcouplingparts

andthecheckingofthecouplingfunctioncannotbestressedtoomuch.

Tasksyouwillberequiredtoundertakewhencouplinginclude:

positioningtowingvehicle

inspectingandpreparingcouplingparts/equipment

stabilisingthepositionofthetrailerinpreparationforcoupling

adjustingthetrailerheightandaligningthecouplingparts

positioningdollies

couplingthetrailers

applyingtrailerbrakes,thentestingconnections

securingcouplingequipmentandrelatedtools.


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Activity 6: What procedures are used to couple and uncoupletrailers?

Your trainer will provide you with a prime mover suitable forcoupling to a given trailer. You are required to complete thecoupling, then discuss this activity with your trainer.


1. Couple a dolly Check that Trailer A coupling jaws are openand that the pin is up.

Check that the dolly drawbar is adjusted tothe correct tow coupling height.

Use mirrors to ensure that the first trailer isin line with the dolly.

Check that the dolly wheels are in line.

Reverse into the drawbar, then visuallycheck the coupling pin to confirm thatcoupling has been completed.

Conduct a trailer tug test.

Connect air hoses and electrical cables.

Wind up the legs.

2. Uncouple dolly Disconnect air hoses and electrical cables.

Ensure dolly park brakes are applied.

Lower the trailer legs and check the stabilityof the dolly drawbar.

Lift the pin to allow uncoupling.

Drive forward to clear dolly drawbar.

3. Observe OH&Sprocedures

Observe all Occupational Health and Safetyprocedures while uncoupling the dolly.


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Feedback onactivities

The responses provided in this section are suggested responses.Because every workplace is different, your responses may varyaccording to your specific workplace procedures, the equipmentavailable and the nature of the business.


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Activity 2: How are loads secured on articulated vehicles?

Study the 4 diagrams below and indicate whether they are

correctly or incorrectly loaded:

Correct Incorrect X

Why Good Load Spread

Correct X

Incorrect Why Load too far rearward

Correct X

Incorrect Why Load too far forward

Correct Incorrect X

Why Load correctly positioned


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Activity 4: How do drivers control trailer skids?

Answer the following questions on controlling skids by describingthe actions to be taken in each case:

1. What are the three steps to take when controlling a drive wheelskid?

1. Ease off accelerator or brakes

2. Steer front wheel towardsdirection of skid

3. When skidding has stopped,gently re-apply the acceleratoror brakes.

2. What are the two actions you need to perform when controllinga trailer wheel skid?

1. Release brakes to regain

trailer wheel traction

2. Lightly tap accelerator if safe todo so

3. Check the setting of the trailerbrake proportioning valve, iffitted.

TLIC607D - Drive Multi Combination Vehicle - Learner Guide

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