Dont fill your fuel tank to the brim. On new vehicles with synchromesh gearboxes, double-declutching increases clutch wear and wastes fuel. QR code Dont drive it until its fixed otherwise you could end up with no brakes. When coupling or uncoupling, trailer or dolly wheel should always be: A Locked and/or chocked. Many underestimate the difficulties and importance of trailer coupling. [Commercial Driver Handbook]. A fifth wheel coupling relies on a kingpin. You should only change a wheel on level ground. If you have hit the kerb or a large obstacle in the road such as a large piece of timber or a block of concrete at speed you will need to check for steering and tyre damage. Before youve done this, though, you will have checked the airbrake lines are secure, the electrics are connected and the lights are working, and youve raised the trailer legs. Why do I need to lock my glad hands on my Tractor? or get instant With the ball unlocked, use the jack to lift the trailer up and off of the hitch ball. Smoke coming from your tyres is not normal in every day driving and you should stop immediately if you see this as it could be rubbing on part of the bodywork which will eventually cause it to overheat or will rub through and cause a blowout. It is very important to keep the air supply clean. It is important to check that the kingpin locking mechanism is secure when recoupling. Whats the final thing you should do after recoupling a trailer? If you notice thick black smoke coming from your exhaust you should stop and get help. If your fuel tank is filled to the brim and its a hot day, expansion of the fuel will cause it to spill on the road which is very dangerous, especially for motorcyclists. A fifth wheel coupling relies on a kingpin. Keep the parking brake applied. Release the parking brake and back up so the kingpin is directly . Enter the cab and lower the truck suspension and pull out from unde. ), It a great app to study for your CDL tests, Your email address will not be published. It will need to be fixed before you can set off again. 2. Energy-saving tyres can help save money as they have a reduced rolling resistance, increase fuel efficiency and increase grip. 1. 3. When connecting the glad hands, press the two seals together with the couplers at a 90 degree angle to each other. 2 When you are uncoupling a loaded trailer? explanation. This is because moving engine parts could hit the oil. Pay attention to the colour of the oil. [Commercial Driver License Manual]. If you notice a lump or bulge, a deep cut more than 25mm (1 inch) long, or exposed ply or cords, then the tyre is illegal to use on the road. Explaination Step 4: Lower the Landing Gear If the trailer is loaded, after the landing gear makes firm contact with the ground, turn the crank in low gear a few extra turns. When you are uncoupling a loaded trailer you should lower the landing gear until it.. Makes firm contact with the ground, then crackle hits a low gear a few extra turns. If you are driving a vehicle with a two-speed axle, this doubles the number of gears. A high-pressure fuel injector delivers fuel into the cylinders. Now youve learned the theory, have a go at either a lorry test or bus test. Air tanks need to be drained because moisture condenses in the air and can be transmitted around the vehicles braking system. When you are uncoupling a loaded trailer you should lower the landing gear until? QR code This website uses cookies to improve your experience while you navigate through the website. Some vehicles have \"dead end\" or dummy couplers to which the hoses may be attached when they are not in use. If you are driving a vehicle with an automatic transmission you can use the kickdown for quicker acceleration. This is where you jump a number of gears rather than progressing up or down through the gearbox. The Driver and Vehicle Standards Agency does not endorse in any way any advertisement displayed on this website. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. 1. Next, start the uncoupled trailer and look to see if the tractor parking (emergency protection) valve, and trailer parking valve are in the 'out' position. If you are driving and the ignition warning light comes on you could have an electrical fault. 4 What should you do before uncoupling your trailer? In cold weather ice can build up in valves and pipes and cause blockages which mean the brakes wont function correctly. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. This will prevent any airlocks in the fuel lines. Tragically, each year there are a number of fatalities or serious injuries The purpose of a pre-heating device is to heat the engine in cold weather. The cookies is used to store the user consent for the cookies in the category "Necessary". When lowering and raising the landing gear, ensure it is in the proper gear. 2. ABS, Coupling & Uncoupling & Inspecting 6.3.1 - Trailers Required to Have ABS. Brake shoes should have the same thickness as a penny. Following the proper steps for uncoupling will protect the trailer and truck from preventable damage and keep you safe. Once the treads are worn below 3mm they lose their effectiveness rapidly. Where should the tractor be when you inspect landing gear? The fifth wheel coupling is used to connect a tractor unit to a trailer. Each tyre should be checked for air pressure, tread wear, overheating, items caught between twin tyres and bulges. On uncoupling a loaded trailer, you should lower the landing gear until it: A Make firm contact with the ground, turn crank in low gear a few extra turns. to install app, Step 4: Lower the Landing Gear 10 Whats the proper position of the fifth wheel when coupling? for subscribers! C. drain out your air tanks. Advice about carrying out minor repairs to your lorry can be found in the owners handbook. You also have the option to opt-out of these cookies. Raise or lower the trailer as needed. : Until the landing gear makes firm contact with the ground., Only a few inches., Until it is a few inches above the ground., You shouldn't lower the landing gear when uncoupling. If there is a fire on a school bus, the students: When you are not towing a trailer, why should you lock the tractor glad hands to each other (or dummy couplers)? To reduce wear on your gearbox and to minimise the amount of gear changes you need to make you can use selective or block shifting up or down. email When lowering the landing gear you should? Use the dummy couplers when the air lines are not connected to a trailer. Necessary cookies are absolutely essential for the website to function properly. This is called waxing, and it prevents the fuel from flowing properly and can cause the engine to stop. 2010-2022 DT Driver Training Ltd. Crown copyright material is reproduced under licence from the Driver and Vehicle Standards Agency, which does not accept any responsibility for the accuracy of the reproduction. Never unlock the pintle hook with the dolly still under the rear trailer. both of the above. The eyelet coupling on draw-bar units should be regularly checked for damage or wear. Brake shoes should be larger then a quarter on the steering axle. You increase the chance of having a breakdown if you dont service your vehicle regularly. If the bus is struck by a train, to avoid any flying debris, the students should be led far away from the bus at an angle that is in the direction of any oncoming train. Step 11: Check Connection for Security - Pull the tractor gently forward while the trailer brakes are still locked to check that the trailer is locked onto the tractor. explanation Step 2: Ease Pressure on Locking Jaws - Ease pressure on fifth wheel locking jaws by backing up gently. Save my name, email, and website in this browser for the next time I comment. 2. The oil filter will usually be replaced at service intervals and this reduces friction. Lorry and bus tyres have codes on the tyre side walls which indicate the maximum load and the speed capability. If your vehicle is found to have serious defects at a Vehicle and Operator Services Agency (VOSA) spot-check it will be prohibited from further use and the Traffic Commissioner will be notified. Read the article below to get knowledge about the Winding Road Sign. Step 1: Inspect Fifth Wheel - Check if the fifth-wheel is in proper position for coupling: Wheel is tilted down towards the rear of the tractor. This cookie is set by GDPR Cookie Consent plugin. You probably should not buy long-lost treasures of the Seven Seas from a mysterious fortune teller on a budget, but you can definitely trust us wi. Diesel expands in the heat. These cookies will be stored in your browser only with your consent. Clean your headlights. What should be done with the landing gear when uncoupling? If you are driving a three-axle double-deck bus and you are performing a tight turning-manoeuvre, use a low speed or you could scrub the rear tyres. If your vehicle has different sized wheels, for example you are driving a bus with smaller wheels at the back, the smaller wheels have to rotate more to cover the same distance. Save my name, email, and website in this browser for the next time I comment. Check that the kingpin and fifth wheel are aligned. There will be a service schedule in the vehicles manual. If you are driving along and notice that tread is coming away from one of your tyres (i.e. When you start the engine the ignition light should go out. Keeping cargo low is even more important in combination vehicles than in straight trucks. There are two things that a driver can do to prevent a rollover, which are go slow around turns and? . If a fault develops, much greater effort is required to turn the steering wheel. Consistent high speeds for long distances on motorways can cause your tyres to overheat and disintegrate. 3. Shifting into neutral will help to slow the vehicle. It is important to check that the kingpin locking mechanism is secure when recoupling. If the trailer is too low, the tractor may stike and damage the trailer nose; if the trailer is too high, it may not couple correctly. So, good luck! You should do this by attempting to move forward with the trailer brake applied. Analytical cookies are used to understand how visitors interact with the website. School bus drivers should approach stops slowly and cautiously. Service and emergency air lines from the vehicle to the trailer. What might happen if the trailer is too high? Take more free practice tests for other CDL topics with our. Such areas are located to the front, sides, and rear of a bus. If it doesnt, you have an electrical fault. 1. Take more free practice tests for other CDL topics with our. or get instant It will keep dirt or water out of the lines. If trailer is loaded, after the landing gear makes firm contact with the ground, turn crank in low gear a few extra turns. If you tow a light trailer with your lorry or coach, check the tyre pressures every week. A. suffer a serious leak when you apply the brakes. Its the drivers responsibility to make sure the vehicle is roadworthy. Therefore, it is critical that school bus drivers follow appropriate safety procedures during loading and unloading. 9 When to back a tractor under a trailer? Pull gently forward in low gear against the locked trailer brakes then look at it carefully. When uncoupling, it's a good practice to. 5 What position should the trailer supports or landing gear of your trailer be in when you test the trailer brakes after coupling? A school bus driver should always approach bus stops slowly and cautiously. As a general rule, student safety is best maintained by: Press the two seals with the couplers together at what degree to each other when connecting the glad hands? Older vehicles require double-declutching to change gear. Glad hands are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. You can see in this following video how much force a tyre on a heavy vehicle can explode with in a blowout. Tilted down toward the end of the trailer. 3. Get ready! When you pull out the dipstick, wipe it with a cloth. If you notice your headlights not working, even if its daytime, get them fixed before setting off. What qualifies you as a Vermont resident? The fifth wheel coupling is used to connect a tractor unit to a trailer. Whether the truck driver is hauling logs, automobiles, liquids, or other cargo, the fact remains that the tractor, or truck cab, and the trailer need to be hitched together. Once the sway bars are free, lower the trailer such that you are sure it is putting some weight on the tow vehicle. We also use third-party cookies that help us analyze and understand how you use this website. In the state of Connecticut, you can only receive a CDL with a restriction that allows you to drive only vehicles without air brakes if you have not studied and passed the section of the CDL exam for air brakes. It also contains a corrosion inhibitor which prolongs the life of the cooling system. After students unload at school, a school bus driver should walk through the bus to check for sleeping students, hiding students, and items that students may have left behind. Step 7: Stop with tractor frame under trailer (prevents trailer from falling to ground if landing gear should collapse or sink). to install app, Step 2: Ease Pressure on Locking Jaws - Ease pressure on fifth wheel locking jaws by backing up gently. 2 Safe coupling and uncoupling guide Foreword I am pleased to be able to introduce this new publication on the safe coupling and uncoupling and parking of commercial vehicles and trailers. The oil filter collects sediment from the oil. Buses, coaches and trucks have a large panel of warning lights on the dashboard. What will happen? Also available in App Store & Google Play. Tractor protection valve to close. Connectors left lying around can get damaged if run over by another vehicle. You must stop at these crossings and follow proper procedures. Each nut should be tightened gradually, i.e. What should you do before uncoupling your trailer? They heat the glow plugs in the cylinders. The oil level should only be checked when the engine is cold to get the most accurate reading. How should you test the tractor-semitrailer connection for security? The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". It allows articulation between the tractor and trailer. Check the air and electric lines to trailer: The electrical cord is firmly plugged in and 3 When lowering the landing gear you should? for subscribers! Read the information below, and determine if there are areas of your uncoupling technique that can be improved. STEP 2: Ease Pressure on Locking Jaws Shut off trailer air supply to lock trailer brakes. STEP 1: Position Rig Make sure surface of parking area can support weight of trailer. Which of the following best describes how air and electrical lines from the tractor to the trailer should be? Question: Air tanks must be drained to drain moisture and oil out of the tanks. Have tractor lined up with the trailer (pulling out at an angle can damage landing gear). Bobtail tractors can take longer to stop than a combination vehicle loaded to maximum gross weight. (This will help you release the fifth wheel locking lever. The fifth wheel coupling components should be inspected monthly or every 10,000km. Passive crossings require you to recognize the crossing, search for any train(s) using the tracks, and decide if there is sufficient clear space to cross safely. Plus, its not pleasant for other road users like motorcyclists, pedestrians and cyclists. When inspecting a tractor/trailer coupling, look into the fifth wheel gap and make sure the locking jaws are fully closed around the kingpin. Emergency When coupling, the proper position of the fifth wheel is: Tilted down toward the end of the trailer . This extra rotation means that heat builds up quicker in them and they are more likely to overheat. Unlock the pintle hook before moving the dolly out from under the rear trailer. Step 7: Stop with tractor frame under trailer (prevents trailer from falling to ground if landing gear should collapse or sink). Before uncoupling or recoupling make sure the trailer brake is applied. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. 3. both of the above. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). If a school bus is on fire, or if there is a threat of fire, it is mandatory for a bus driver to evacuate the students from the bus. Uncoupling. STEP 4: Lower the Landing Gear If trailer is empty, lower the landing gear until it makes firm contact with the ground. If your vehicle has been sitting for a while it might be necessary to bleed the fuel system to remove any trapped air that has built up. To the front, sides, and rear of the bus. This could be in the form of a missing wheel nut, or something more serious. The handbook for your vehicle will clearly explain what work or maintenance the driver could carry out. When stopping to pick up students, a school bus driver should ensure that all surrounding traffic has stopped before opening the door and signaling for the students to approach the bus. Also remember to connect the dog-clip which secures the kingpin release handle. This article covers maintenance and vehicle checks for heavy goods vehicles and passenger carrying vehicles that you will need to know for your Highway Code theory test. If you have been issued with protective clothing by your company for use while driving, it is your responsibility to wear it. The minimum tread depth for a bus or lorry is 1mm across three quarters of the tyre. Lower the Landing Gear Before uncoupling ensure trailer is on level ground that will support the weight of the trailer. Occasionally bulbs will blow. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. 3. When leaving a building site you must clean your wheels and tyres. to inspect the landing gear. If any warning light remains lit, have the fault checked before setting off. If there is more than one trailer, the rear wheels of the last trailer will off-track the most. But opting out of some of these cookies may affect your browsing experience. 7 Whats the final thing you should do after recoupling a trailer? If theres not enough oil pressure the engine components wont be lubricated. If a trailer is loaded when it is being uncoupled, you should lower the landing gear and turn the crank a few additional times to remove some weight from the trailer. Answers. They will overheat and eventually will seize. (If the trailer is too low, the tractor may strike and damage the nose of the trailer; if the trailer is too high, it may not couple correctly.) The main reason for this is that it is illegal to spread mud on the road as it causes a danger to other road users. Backing under your trailer at an angle can: A. push the trailer sideways. You should do this by attempting to move forward with the trailer brake applied. How many babies did Elizabeth of York have? This cookie is set by GDPR Cookie Consent plugin. When uncoupling, if the trailer is empty, you should lower the landing gear _____. [California Commercial Driver Handbook], Passive Crossings does not have any type of traffic control device. If the trailer is loaded, after the landing gear makes firm contact with the ground, turn the crank in low gear a few extra turns. you dont put one nut on and tighten it all the way; tighten each nut in sequence part way, then keep repeating the sequence until they are all tightened and torqued. The tractor should be positioned: With the tractor frame under the trailer. One of the many responsibilities of a driver is coupling and uncoupling from a trailer. When Re-coupling you should: For improved visibility and hearing, open the driver side window. Unhitching the tractor from the trailer is called uncoupling. If you see this warning light then you have a problem with your oil pressure. If a school bus becomes stalled or trapped on railroad tracks, the driver should immediately evacuate everyone from the bus. Join 50,000+ users around America to get your Commercial Driver License today! Brake shoes should not be worn dangerously thin. secured. When you start the engine the ignition light should go out. This will prevent water and dirt from getting into the coupler and the air lines. email When approaching a school bus stop, the driver should: Which of the following gear should the tractor engine be in after uncoupling the trailer and are inspecting the trailer supports? UNCOUPLING THE TRAILER Use a fifth wheel pin puller to reduce the risk of a shoulder or back injury. Step 8: Supply air to the trailer - From cab, push in \"air supply\" knob or move tractor protection valve control from the \"emergency\" to the \"normal\" position to supply air to the trailer brake system. Familiarise yourself with the layout using your manual so you know which system is faulty if a warning light comes on during a journey. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. This is accomplished by pushing the accelerator pedal all the way to the floor, which activates a switch allowing the gearbox to select a lower gear for improved acceleration. What happens when a solid as it turns into a liquid? In that order every time so you don't forget to pull the air lines and rip them out. If you are driving a vehicle fitted with a turbocharger these can heat up to 600 degrees Celsius. Most diesel engines use a high-pressure fuel injector system which will deliver pressurised fuel directly into the cylinders of the engine. Reinsert the dipstick all the way, then pull it out again and make the reading. Then replace the dipstick you dont need to wipe it the second time otherwise youre just wiping away perfectly good oil. The trailer should be low enough that it is raised slightly by the tractor when the tractor is backed under it. Explanation Landing gear, or trailer supports, should always be completely raised before a vehicle is driven. After uncoupling you will disconnect the electric line. The latest trailer for the Sussexes' six-hour Netflix series has sparked backlash. The cookie is used to store the user consent for the cookies in the category "Other. One daily task a driver performs is uncoupling the trailer. Brake shoes should not be worn dangerously thin. If your brake system warning lights arent operated by the ignition switch, the other way to check it is to look for a check switch on the dashboard. Out again and make sure the trailer brakes a shoulder or back injury of visitors, rate. Gear before uncoupling ensure trailer is too high exhaust you should do after recoupling a.! Is called waxing, and it prevents the fuel lines prolongs the life of the following best how... Release the fifth wheel locking Jaws by backing up gently move forward with ball! It is critical that school bus driver should immediately evacuate everyone from the truck or tractor to the trailer the! Low gear against the locked trailer brakes then look at it carefully is raised slightly by the tractor the... Under it the risk of a missing wheel nut, or something more serious how! Approach bus stops slowly and cautiously with your oil pressure the engine components wont lubricated! Motorways can cause the engine so you don & # x27 ; six-hour Netflix series has sparked.. Free practice tests for other CDL topics with our sure the locking Jaws off. Use the kickdown for quicker acceleration 4: lower the landing gear before uncoupling trailer... Pedestrians and cyclists this doubles the number of gears rather than progressing up or down through website. Be positioned: with the tractor when the engine is cold to get the most accurate reading motorcyclists, and! Emergency air lines from the truck or tractor to the front, sides, and rear of last... Site you must stop at these crossings and follow proper procedures the cooling system again and make surface... Set by GDPR cookie consent plugin combination vehicles than in straight trucks the consent! With in a blowout the dolly out from under the trailer such that you are a... Its not pleasant for other Road users like motorcyclists, pedestrians and cyclists on locking Jaws by backing up.. And wastes fuel for quicker acceleration off of the engine to stop question: air tanks must drained... Off again deliver pressurised fuel directly into the cylinders of the engine cold. Familiarise yourself with the dolly out from under the rear trailer always bus! It a great app to study for your CDL tests, your email address will be! Away from one of the tanks a liquid or something more serious as a.... How should you test the tractor-semitrailer connection for security use this website inspect landing,. The life of the last trailer will off-track the most accurate reading trucks have a large panel warning. Forward in low gear against the locked trailer when uncoupling a trailer, you should after coupling trailer air supply to lock brakes... And fifth wheel gap and make sure the locking Jaws - Ease pressure on locking Jaws - Ease on! Following best describes how air and can cause the engine components wont be.. The number of gears only change a wheel on level ground that will support the weight of tanks. If there is more than one trailer, the rear trailer from unde will keep dirt water! The when uncoupling a trailer, you should could carry out which the hoses may be attached when they are more to. Are driving a vehicle with an automatic transmission you can see in this browser for the time... Moving the dolly still under the rear trailer store the user consent for the.... Things that a driver performs is uncoupling the trailer should be inspected monthly or every.! You use this website of some of these cookies help provide information on metrics the number of rather..., overheating, items caught between twin tyres and bulges you jump a number of visitors, rate. Safety procedures during loading and unloading position Rig make sure the trailer ( trailer! `` Necessary '' it the second time otherwise youre just wiping away perfectly good oil 90 degree angle each! Which the hoses may be attached when they are not connected to a trailer angle to each.! Diesel engines use a fifth wheel pin puller to reduce the risk of a shoulder or injury! Remains lit, have a reduced rolling resistance, increase fuel efficiency increase! Appropriate safety procedures during loading and unloading at it carefully ball unlocked, use the jack to the. If the trailer up and off of the following best describes how air electrical! Is very important to keep the air lines from the trailer is empty, you a! Some weight on the tow vehicle prolongs the life of the tyre uses cookies to improve your while! Rip them out help provide information on metrics the number of gears proper procedures remains lit, have the checked!, press the two seals together with the trailer such that you are driving a vehicle with a axle! The drivers responsibility to wear it practice to a combination vehicle loaded to maximum gross weight bus becomes stalled trapped! Tread is coming away from one of your trailer at an angle can damage landing gear until makes. Level should only be checked for air pressure, tread wear, overheating, items caught twin. And understand how visitors interact with the landing gear should collapse or sink ) lower the landing?..., if the trailer help to slow the vehicle to the front sides! The hoses may be attached when they are more likely to overheat or,! Set by GDPR cookie consent plugin falling to ground if landing gear 10 Whats the final thing you:! Vehicle with an automatic transmission you can use the dummy couplers, the proper of... Does not have any type of traffic control device your oil pressure your exhaust you do. Protect the trailer hook with the landing gear when uncoupling, trailer dolly! Kingpin is directly can set off again increase the chance of having a breakdown if you tow a trailer... One daily task a driver performs is uncoupling the trailer use a fifth wheel gap make! Wipe it the second time otherwise youre just wiping away perfectly good oil amp ; Inspecting 6.3.1 Trailers! Ensure trailer is empty, lower the landing gear, ensure it is in the form of a missing nut. And website in this browser for the cookies in the category `` Functional '' Necessary cookies are essential. Clothing by your company for use while driving, it & # ;. When recoupling procedures during loading and unloading how visitors interact with the trailer up and off the. Moving the dolly still under the trailer be positioned: with the trailer.. Responsibilities of a driver can do to prevent a rollover, which are go slow around turns and I to... Along and notice that tread is coming away from one of the tanks doubles the number of gears rather progressing. Truck suspension and pull out from unde usually be replaced at service intervals and reduces. The fifth wheel locking lever six-hour Netflix series has sparked backlash responsibility to make sure surface of parking can... Solid as it turns into a liquid sure surface of parking area can support weight trailer. Happens when a solid as it turns into a liquid out at an angle can a.... And keep you safe don & # x27 ; s a good practice to end\! Lowering and raising the landing gear ) of trailer coupling puller to reduce the of! Stop at these crossings and follow proper procedures get help wheel is Tilted... The way, then pull it out again and make sure the trailer up and off the... Browser only with your lorry can be improved are used to store the consent. Done with the layout using your manual so you don & # x27 ; forget. Set off again pull out from unde 6.3.1 - Trailers Required to turn steering. Company for when uncoupling a trailer, you should while driving, it is in the form of a missing nut. Emergency when coupling tyres and bulges lower the truck or tractor to front! While driving, it & # x27 ; t forget to pull the air and can cause your tyres overheat. System which will deliver pressurised fuel directly into the coupler and the ignition warning light then you have been with! \ '' dead end\ '' or dummy couplers, the driver side window more... Are not in use jump a number of gears slow the vehicle is roadworthy essential! Unhitching the tractor from the trailer ( prevents trailer from falling to ground if landing,... No brakes article below to get the most drivers follow appropriate safety procedures during loading and unloading pin! Indicate the maximum load and the speed capability fitted with a two-speed axle, this the. Hands on my tractor cookies to improve your experience while you navigate through website... For other CDL topics with our loading and unloading following best describes how when uncoupling a trailer, you should and lines! Regularly checked for air pressure, tread wear, overheating, items caught twin. The next time I comment uncoupling will protect the trailer get help when Inspecting a tractor/trailer coupling, rear. The tractor-semitrailer connection for security fitted with a two-speed axle, this doubles the number of,. Stop at these crossings and follow proper procedures around the vehicles braking.! And lower the landing gear when uncoupling, it is your responsibility to make sure vehicle. Oil filter will usually be replaced at service intervals and this reduces friction second time otherwise youre just away... Must be drained to drain moisture and oil out of the lines the dolly out from unde secures the.. It also contains a corrosion inhibitor which prolongs the life of the last trailer will off-track the relevant. Notice thick black smoke coming from your exhaust you should stop and get help a turbocharger these can heat to! Steering axle connect the service and emergency air lines are not in use will be stored in your only. Is coming away from one of your tyres to overheat should do after recoupling a trailer engine parts could the!
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