eagerbeaver:
Eddie-that will explain the constant wheelspin the other day when I took one of the brand new 15 plate units for its first drink of diesel. (£450 EEK!!). Bloody thing was wheelspinning like a dodge charger. Even with a gentle right foot!!
Maybe its a euro 6 thing
Mine is a pain, nightmare to get away at roundabouts when the road is only damp even when empty with as many wheels off the ground as poss
But as the summer approaches they get more civilised with the dryer roads. and by the autumn you’ll have her fully tamed
Juddian:
On the DAF if you operate that umbrella switch loaded you should find the tag lifts completely off the ground for as long as you need it to, that cancels as soon as you get up to about 20kph if you don;t drop the axle again once moving…have a play.
Is that on an XF 105 ■■ , that would have been really handy to have known 6 months ago !! ,
I did some sugarbeat work ( got told to lift the mid axle as soon as it’s empty ) and getting out of some of the muddy tracks was a real pain with the lift axle down , easy with it lifted on the way in !!
Juddian:
On the DAF if you operate that umbrella switch loaded you should find the tag lifts completely off the ground for as long as you need it to, that cancels as soon as you get up to about 20kph if you don;t drop the axle again once moving…have a play.
Is that on an XF 105 ■■ , that would have been really handy to have known 6 months ago !! ,
I did some sugarbeat work ( got told to lift the mid axle as soon as it’s empty ) and getting out of some of the muddy tracks was a real pain with the lift axle down , easy with it lifted on the way in !!
I’ll have a look and a play thankyou
That was on a CF, but i doubt the XF will any different, MAN’s do exactly the same ie lift the entire (small anyway) mid lifter out the way…don’t think Scani’s lift the axle entirely when loaded but they do dump the air adequately.
The only motor i never had any joy with dumping air was Iveco Stralis, but hardly surprising.
By the way, if anyone’s finding wheelspin is cutting power which can be a PITA trying to get grip on wet or loose ground (especially annoying when you’re saddled with a modern lorry auto), turning the TC or ASR off as well as dumping/lifting tags will help no end.
Please correct me someone if I’m wrong. When you raise the centre axle on a Scania unit the ride height increases by IIRC something like 3 inches, which means that your 14’3" marked trailer is now 14’6" high. The same thing happens with the back end of most rigid vehicles. As for the trailer lift axles I think you are going to end up looking like Mo Farrah on a training day, as you circle the trailer over and over again looking for the park brake button, the shunt button, the ride height control and the axle lift button. Why on earth the manufacturers can’t decide between themselves on a standard location I don’t know.
The trailer to look out for is the rear steer which steers the rearmost axle automatically and which locks straight ahead when you select reverse gear… except it doesn’t always lock! make sure you know when you’ve got one of these behind you. I will leave others to relate experiences of these pigs.
cav551:
Please correct me someone if I’m wrong. When you raise the centre axle on a Scania unit the ride height increases by IIRC something like 3 inches, which means that your 14’3" marked trailer is now 14’6" high.
Correct (though i’ve never measured the actual height increase at the top of a normal trailer), there was good reason for that with twin steer full sized tag wheels, even with the extra height you would find the ‘lifted’ second axle hitting the road and spinning up frequently over undulations, but there is no earthly reason with the small wheeled non steered mid lifts for the chassis to raise height, bags of clearance.
The strangest steered trailer i’ve used was a single axle steerer, weird doesn’t come into it, brilliant when driving forward cos it follows the same line as the tractor, but reversing onto a bay was fascinating…the only way i could do it was to not look at the trailer body at all, if you try to reverse it normally the thing went all over the shop, but if you ignore the trailer and concentrate on where the single axle is going it goes in a treat.
Juddian:
On the DAF if you operate that umbrella switch loaded you should find the tag lifts completely off the ground for as long as you need it to, that cancels as soon as you get up to about 20kph if you don;t drop the axle again once moving…have a play.
Is that on an XF 105 ■■ , that would have been really handy to have known 6 months ago !! ,
I did some sugarbeat work ( got told to lift the mid axle as soon as it’s empty ) and getting out of some of the muddy tracks was a real pain with the lift axle down , easy with it lifted on the way in !!
I’ll have a look and a play thankyou
That was on a CF, but i doubt the XF will any different, MAN’s do exactly the same ie lift the entire (small anyway) mid lifter out the way…don’t think Scani’s lift the axle entirely when loaded but they do dump the air adequately.
The only motor i never had any joy with dumping air was Iveco Stralis, but hardly surprising.
By the way, if anyone’s finding wheelspin is cutting power which can be a PITA trying to get grip on wet or loose ground (especially annoying when you’re saddled with a modern lorry auto), turning the TC or ASR off as well as dumping/lifting tags will help no end.
Yep that’s true, and the TC can operate at any speed unlike the air dump
You forgot to mention that the Volvo mid lift will come off the ground for shunting at any weight, one thing the Scania do with
The strangest steered trailer i’ve used was a single axle steerer, weird doesn’t come into it, brilliant when driving forward cos it follows the same line as the tractor, but reversing onto a bay was fascinating…the only way i could do it was to not look at the trailer body at all, if you try to reverse it normally the thing went all over the shop, but if you ignore the trailer and concentrate on where the single axle is going it goes in a treat.
Was that a positively steered axle or on castors, used a single axle trailer ocasionally a few years back, that was positively steered, by means off a hydraulic rubbing plate. It was brilliant, followed the unit exactly, but like what you say, you have to forget everything you know about reversing, the trailer would steer itself into any space where you put it
The strangest steered trailer i’ve used was a single axle steerer, weird doesn’t come into it, brilliant when driving forward cos it follows the same line as the tractor, but reversing onto a bay was fascinating…the only way i could do it was to not look at the trailer body at all, if you try to reverse it normally the thing went all over the shop, but if you ignore the trailer and concentrate on where the single axle is going it goes in a treat.
Was that a positively steered axle or on castors, used a single axle trailer ocasionally a few years back, that was positively steered, by means off a hydraulic rubbing plate. It was brilliant, followed the unit exactly, but like what you say, you have to forget everything you know about reversing, the trailer would steer itself into any space where you put it
Yep, positively steered, fantastic for reversing if you mentally blanked out the trailer and just watched the wheels.
Hi folks. Had a root around a couple of our trailers this morning. The one I took out was quite a new one.
Towards the rear of the trailer (offside),there was a yellow handle which looked to me like a trailer height adjuster. When in the centre position(as it was),I would assume it was auto selected. The trailer height looked spot on so I didn’t mess. Just next to this on the chassis was what looked like an electrical ’ control box ’ with a cover on which read ’ HALDEX INFO CENTRE '.
Would this be the rascal with which I might or might not be able to lower the axle on the trailer? Anyone know?
On trailers at work the ones with a lift axle on the trailer have just a button like the park brake that you either pull or push. Great when a tyre on that axle gets a puncture as you can carry on.
Looks as though its the Gen2 one you got there… generally speaking it depends on the number of applications have been installed on the trailer to run parallel with the EBS ( Info Box ) , tyre pressures, Suspension , Braking… Stability
I did once or twice and never saw or heard untoward noises. That said I don’t lower it if moving, only raise if I’ve forgotten after unloading
Generally lower if I get a load that approaches 7t across the bed.
It’s got a load sensor anyway so will lower itself once i put ignition on after a heavy load put on. I’ve got used to the extra hissing now so know what it’s doing and let if settle before setting off.
Much prefer it up as far better turning circle, crap as it is anyway !
We’ve got two types of trailer with lift axles. Both lift front wheels automatically when trailer senses its light enough. The over ride switches are on n/s either at rear or in middle of trailer. One type is a green button with no markings which you press and hold for 10 secs and wheels drop. The other type is next to trailer height adjuster and is a twist switch that you hold down for 10 secs.
One thing I have noticed , we run 4x2 units and you have to watch your axle weights on the front of the unit. I’ve been at 28 ton all in and with the trailer raising the axle up, the units front axle has been overloaded. Dropping axle sorts it.
… its a diagnosis box for recording data