Just out of interest, what causes axle drag?
I came to a pretty rapid stop earlier, luckily in the yard 
I was getting no warnings about it, everything was as it was supposed to be 
Was the diff lock engaged?
Truckbling:
Was the diff lock engaged?
It was on a normal curtain side trailer…
If you are screwing round too sharply with a decent load on then the resistance caused by the tyres rubbing on the deck will promptly bring you to a halt. Try using a bigger turning circle.
Truckbling:
If you are screwing round too sharply with a decent load on then the resistance caused by the tyres rubbing on the deck will promptly bring you to a halt. Try using a bigger turning circle.
I did, it was in a DC yard with enough room to turn a super tanker, and only had empty cages which at a guess would weigh about 1.5-2t if that…
Brakes binding or maybe a wheel bearing, either way chances are there would be some heat build up (unless you’ve only just coupled up or set off) so stick your hand by the hubs to see if one is hotter than the rest.
Hand brake on?
stevieboy308:
Brakes binding or maybe a wheel bearing, either way chances are there would be some heat build up (unless you’ve only just coupled up or set off) so stick your hand by the hubs to see if one is hotter than the rest.Hand brake on?
That’s the thing, there wasnt any heat build up, did a run to Sussex and back and every time I stop I make a point of having a quick walk round just in case…
You may have kinked the red air line as you turned.
That’s what happens when you drive ■■■■■■tesco trucks 
Unusual if this happens lightly loaded.
It can happen with satans automated manual gearboxes on turns when loaded heavily, you start moving away from rest in auto and just as you tighten the turn and the trailer tyres object the bloody idiot box decides to change up a gear or three, some modern engines simply can’t cope at those lower revs and the thing will stall or kangaroo, often enough the vehicle will track backwards as the tyres straighten back up.
Worse i’ve found for this by a long chalk is MANs and Ivecos, but Scanias can be just as bad unless you override the autobox.
Best i’ve found in modern fleet motors for low revved torque is Axor, pull right down to stall speed (well in the manual boxed versions anyway auto is pants) without the slightest murmer, proper drivers lorry that not a poseurs.
Never heard of axle drag tbh. What I suspect happened was you pulled away before the air had built up fully, the brakes were not fully released and as you turned that became more pronounced and stopped you.
Next… 
the maoster:
Never heard of axle drag tbh. What I suspect happened was you pulled away before the air had built up fully, the brakes were not fully released and as you turned that became more pronounced and stopped you.Next…
Sussex to Reading not enough time to build the air up then 
DAF95XF:
the maoster:
Never heard of axle drag tbh. What I suspect happened was you pulled away before the air had built up fully, the brakes were not fully released and as you turned that became more pronounced and stopped you.Next…
Sussex to Reading not enough time to build the air up then
What, you took the yard with you too? Terribly sorry, in my stupidity I mistakenly thought that as you stated you were in the yard that you’d done some short movements, and maybe Heaven forbid used your brakes. Hey ho, you live and learn.
Tesco kit has a built in facility designed to stop trailers getting turned over by over exuberant driving round bends. Sounds like what you’re talking about.
DrivingMissDaisy:
Tesco kit has a built in facility designed to stop trailers getting turned over by over exuberant driving round bends. Sounds like what you’re talking about.
It wasn’t that, was a slow speed manuvere and the shunter spotted the problem after he watched me…
was it both sides on the same axle?
could be a brake chamber failure
DAF95XF:
DrivingMissDaisy:
Tesco kit has a built in facility designed to stop trailers getting turned over by over exuberant driving round bends. Sounds like what you’re talking about.It wasn’t that, was a slow speed manuvere and the shunter spotted the problem after he watched me…
What exactly were you doing then? I’m guessing not just driving straight down the yard?
If you were in an axor and you popped the handbrake on and off a few times they can get low on air… that and some tesco curtainsiders make B&M kit look good in terms of their age and air holding ability
.
Most likely scenario is it somehow interrupted the air supply down the red line when the susie stretched.
As a safety mechanism, if for example the whole trailer became detached to stop it rolling off down a hill, if the pressure from the red line goes there’s an emergency relay valve in the trailer that sends full trailer tank pressure to the brakes as if it’s an emergency stop. Possibly the coupling on the trailer is worn, allowing air to escape when it’s pulled about or if rusty the coupling may not even have been on properly which is a good reason to make sure you can twist the collars after connecting up.
shuttlespanker:
was it both sides on the same axle?could be a brake chamber failure
Tbh Rob, I don’t have a clue, I think looking at the skid marks left it was on the near side only…
If it was a brake chamber wouldn’t I still hear air escaping?