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 Previous issues: (ESPAÑOL)

Number 1 / Sep 28, 2007
  - Which is the proper driving position? (1)
  - Using automatic transmissions
  - What is a vehicle policy good for?
Number 2 / Oct 4, 2007
  - Which is the proper driving position? (2)
  - What to do when the engine overheats
  - Evaluate and train drivers
Number 3 / Oct 11, 2007
  - How to brake correctly (1)
  - How to distribute load in trucks
  - The reasons why road research is necessary
Number 4 / Oct 18, 2007
  - How to brake correctly (2)
  - Tips to conserve the battery
  - Auditing vehicles
Number 5 / Oct 25, 2007
  - How to brake correctly (3)
  - How to maintain tires in good conditions?
  - Managing vehicle risk
Number 6 / Nov 1, 2007
  - How we adjust car mirrors?
  - How to prevent the engine from overheating?
  - Accidents study
Number 7 / Nov 8, 2007
  - Precautions when driving at night
  - Fifth Wheel and King Pin (1)
  - Trip planning, a combining tool
Number 8 / Nov 15, 2007
  - Braking with air brakes
  - Fifth Wheel and King Pin (2)
  - Repair shop audits
Number 9 / Nov 22, 2007
  - The overtake manoeuvre (1)
  - Tire maintenance (1)
  - 24hs driving safely recording
Number 10 / Nov 29, 2007
  - The overtake manoeuvre (2)
  - Tire maintenance (2)
  - Taking responsibility for the hired driving
Number 11 / Dec 6, 2007
  - Driving when it rains
  - Understanding tire markings
  - Access control
Number 12 / Dec 13, 2007
  - Driving with Anti Lock Braking System
  - Coupling system safety
  - Safe driving, Values and Culture
Number 13 / Dec 21, 2007
  - When it's better to avoid driving?
  - Safety chains for coupling systems
  - Management rules and certification
Number 14 / Dec 27, 2007
  - Overspeed brakes' trailers
  - Air conditioning maintenance
  - Where to start from
Number 15 / May 14, 2008
  - Driving Definition
  - Clutch maintenance
Number 16 / May 28, 2008
  - The Attitude's influence when driving
  - Gear box oil
Number 17 / Jun 11, 2008
  - Driving through curves
  - How to choose the best tires
Number 18 / Jun 25, 2008
  - Anxiety effects in driving
  - Maintained shock absorbers, safety vehicles
Number 19 / Jul 10, 2008
  - Driving backwards
  - Prepare your vehicle for cold weather
Number 20 / Jul 23, 2008
  - Sleeping well, better driving
  - Exhaust fumes colour diagnosis
Number 21 / Aug 6, 2008
  - How to ascend and descend slopes safely
  - The engine cooling system
Number 22 / Aug 20, 2008
  - Dysfunctional beliefs in women and men driving
  - Safe Load in Tank Trucks
Number 23 / Sep 3, 2008
  - Driving in the fog
  - Safe lights
Number 24 / Sep 17, 2008
  - Driving in the fog - Second part
  - Hydraulic brakes safe maintenance (1)
Number 25 / Oct 1, 2008
  - Bad habits and their influence in behaviour
  - Hydraulic brakes safe maintenance (2)
Number 26 / Oct 15, 2008
  - How we learn to drive
  - Reducing tire air pressure
Number 27 / Oct 29, 2008
  - Crossing junctions
  - Dangerous alterations and modifications on heavy vehicles
Number 28 / Nov 12, 2008
  - Driving and distraction
  - Common transmission failures
Number 29 / Nov 26, 2008
  - Two different ways of understanding "Driving"
  - Safe lights
Number 30 / Dec 10, 2008
  - Preventing distractions
  - Failures easy to be detected
Number 31 / Jan 14, 2009
  - "Accident", its definition
  - Electronic Stability Control
Number 32 / Jan 28, 2009
  - Fatigue, the driving enemy
  - The steering on vehicles
Number 33 / Feb 11, 2009
  - Perceptual phenomena
  - Steering regulation
Number 34 / Feb 25, 2009
  - Car drivers and bikers, an intelligent coexistence
  - Progress in steering systems
Number 35 / Mar 11, 2009
  - Wrong horn usage
  - How the clutch works
Number 36 / 25 Mar, 2009
  - Driving in snowy roads
  - Clutch maintenance
Number 37 / 8 Abr, 2009
  - Understanding signposting
  - Expiring dates
Number 38 / 22 Abr, 2009
  - Rage control
  - The importance of the engine's torque when driving (1)
Number 39 / 6 May, 2009
  - Can we improve our driving techniques?
  - The importance of the engine's torque when driving (2)
Number 40 / 20 May, 2009
  - Driving and antidepressants, a dangerous combination
  - Correct 4x4 transmissions usage
Number 41 / 3 Jun, 2009
  - The attention degree can be improved
  - Maintenance: the key to extend the engine's service life
Manejo Inteligente Manejo Inteligente
 www.drivingconsultancy.com
Info Manejo November 22, 2007
 number 8
This is the 8th INFO MANEJO. We offer you the second part of the advices for maintaining the coupling system, the explanation of why there is an additional distance when using air brakes and why it's important to audit repair shops.

Manejo
    Braking with air brakes
Most of the heavy vehicles driven through our streets and routes have air brakes. We should bear in mind that this kind of braking system functions with an additional delay.

This delay is produced because the last braking system circuit and its actuators are empty when the pedal brake is operated; consequently, an extra period of time sums up to stop the vehicle.

It's important to bear in mind that each extra second used to stop the vehicle turns into a longer distance covered.

When driving a truck, tractor or bus we should consider an additional period of 1 second to brake. If it carries a trailer, this can add ½ second more.

That is why, since the pedal is operated, there is a distance of additional metresdistance covered inevitably till the vehicle starts to stop. Therefore, when driving this kind of vehicles the safety following distance should be 4 seconds minimum.

Warning: Driving distances calculations vary with the driver and depend on their previous knowledge and experience. For this reason, the following distance, braking, etc. indicator tables is based on calculations that should be considered as a reference.

heavy vehicles Manejo
   Fifth Wheel and King Pin    (2nd part)
More advices to maintain and to use correctly the coupling system:

+ Don't use common greases as lubricants. They don't work for open mechanisms, because they stick to dust, sand, etc., which turn them quickly into an abrasive paste.

+ Every time maintenance work is done, with the trailer with the brakes on and the first gear change set, check that both vehicles are tightly coupled.

+ The locking handle and its mechanism have the function to open and shut the skidplate, but not to keep it locked. This mechanism is weak and its eventual damage or worn out can accidentally open the skidplate while driving.

+ The locking handle should not move when it's locked. If this happens, it indicates that the locking mechanism is excessively worn out.

+ The locking handle security is designed to prevent strangers from opening the skidplate, it's called "anti - vandalism security", but it doesn't work to keep the skidplate shut when its parts are worn out.

IMPORTANT: The coupling mechanism is the only connection between the tractor and the trailer, plus its load. Defects cause a sudden uncoupling, which leaves the trailer and its load free and driven by inertia, being impossible to handle them.

Manejo
   Repair shop audits
In order to mitigate the implicit risk in transport, periodic revisions should be done to each vehicle. In turn, these revisions should lead us, earlier than later, to check how the preventive maintenance is done. That is why for all vehicle risk mitigation process it's necessary to include the audits to the repair shops and maintenance, verification and reparation places.

In downtown it's common to find specialized repair shops, well equipped and with suitable personnel for the different vehicle safety subsystems: brakes, tires, coupling systems, etc. But, it's more difficult to find places with similar characteristics in rural or far away spots. It's here where the audits should be accompanied by:

+ Training the involved personnel

+ Setting up standard procedures for the periodical maintenance

+ Tools and equipment verification

+ Knowing and complying with rules and with the manufacturer specifications, plus their last updates

Another important point is to check the spare parts used, most of all, when the maintenance or reparations are done in outsource repair shops. Their legitimacy assures, apart from sticking to the law, that the parts are manufactured with the suitable materials and the processes established by the manufacturer. This implies a maintenance cost drop because the spare part is more durable.



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Driving Consultancy - Av. Rivadavia 2031 - 3º 6 - CABA - Argentina - info@drivingconsultancy.com - (54 11) 4951-3274