tachograph:
Carryfast:
How can anyone possibly miss the pin if the trailer plate is sitting lower than the height of the fifth wheel table from the start and is therefore lifted onto the table from the first point of contact ?.As opposed to the foreseeable potential for error in people going under low and slightly over shooting the pin.Then lifting the table against a fouled pin thereby leaving the pin sitting on top of the fifth wheel rather than in the jaws.Resulting in the possibility of a runaway trailer either running off the back or over the front when the lines are coupled if the driver hasn’t noticed it.
The miscoupled trailer scenario obviously being one of the main dangers regarding runaway trailers crushing drivers between the unit and trailer on the catwalk.Obviously together with the other possibility of not applying the unit handbrake resulting in a completely runaway vehicle.
You obviously don’t understand the method you’re criticising.
When using the air suspension to lift the trailer, if you go under the trailer anywhere near far enough to go under the pin before raising the trailer you’ve either got a trailer with the pin unusually close to the front of the trailer or you’re doing it wrong, in fact if you even come close to reaching the pin before raising the trailer you’re doing it wrong.
To be fair the distance travelled,at the driving seat,from the front of the trailer plate reaching the fifth wheel table to the pin reaching the jaws isn’t that far.While if we’re talking about runaway trailers/trucks the driver has obviously already got it all ‘wrong’ at that point and do we really need to add more predictable room for yet more error in the form of a mis couple,with the pin possibly sitting ‘on’ the jaws instead of ‘in’ the jaws,situation caused by the go under low and lift method.
Rather than everything being lined up properly from the start and lifting the trailer,using the ramps and/or the fifth wheel forks for the job they are designed to do,just as shown in the training video.Which provides a fool proof guarantee that the pin will have to and can only go into the fifth wheel jaws properly from the start.Even in the case of a mis coupled runaway trailer running forwards as,just as described by Winseer,that’s as far as it will possibly get.Unlike if the pin is mistakenly sitting on top of the fifth wheel caused by a driver going under low and lifting too late and thereby fouling the pin against the fifth wheel and for whatever reason not noticing it. 