Rank: Forum user 
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Good afternoon
How many of you who work in the logistics industry insist on having HGV's turn their engines off while loading / unloading using dock platforms or levellers?
I though it was almost industry standard to prevent premature departure. However, I am now being told that this is not always possible with some HGVs as the air system will cause the wagon to lower if the engine is turned off.
I though all the air systems could be locked. I don't believe they would simply empty when the engine is not provising power to them.
has anyone had any experience with wagons lowering like this?
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Rank: New forum user
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To my knowledge the air bags should not deplete.
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Rank: Super forum user
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AM1 - no I have not - however there are many types of HGVs.
I think you need to delve deeper into this one as you have more info at hand but it does not sound right.
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Rank: Forum user
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We get the driver to switch off and hand in the keys, or get them to stand in a safe area within the warehouse. Also the use of chocks is advantageous, and applying trailer brakes. I would think it unlikely that the LGV's would lose air, unless there was a significant air leak or the trailer was left for a long period of time without an air supply.
However if they require the engine running for what ever reason, I would recommend a system where the driver removes the red air line as this will lock on the brakes, or placing a large item i.e. IBC in front of the tractor unit to ensure you don't have an "early drive" off incident.
Last point, some drivers like to keep spare keys, or hand in an unrelated bunch so they can sit in their cabs !!
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Rank: Forum user
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It is considered best practice for HGV Drivers on loading bays to surrender their keys to the warehouse operator / transport desk to prevent the vehicle from moving whil it is being loaded / unloaded.
A vehicle / trailer wil only lose air from its suspension if their is a leak or other problem. If the HGV needs to run its engine constantly to keep the air pressure up then I'd suggest it has a problem that needs looking at, tractor / trailer combinations can lead to loss of air.
This loss of air however is gradual - a sudden loss of air is a problem with eitehr a compressor malfunction, air line breakage or other such major problem.
Be aware also that many drivers have spare keys - some HGV manufacturers prohibit the use of certian functions as radios, night heaters etc without the presence of a key and for a driver left on a bay for a few hours it will mean he/she more than likely has a way around it. That's not to say they will pull away during loading/unloading but your systems should consider this possibility or you provide a rest room that all drivers are to wait in during the loading / unloading.
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Rank: Super forum user
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Rank: Forum user
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I suspect that also.
Air leak is the only reason I can think of - and if they leak enough to lower the wagon to a point that makes the dock leveller inoperable, we shouldn't be allowing trucks like that in the first place.
thank you all for your thuoghts
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