To inflate a Dxi Premium or Magnum there is a bung on the n/s of the chassis - in the case of a 6x2 its between the axles -a 4x2 in front of the rear.This line is exactly the same as the compressor input just takes a bit longer
It won’t work if the dryer is u/s as it just blows out the exhaust port - with an adaptor you can use the redline from another unit to charge the system - it just takes a bit of time.
Renault’s don’t select neutral when you switch off - if the air goes down overnight on the auxillary circuit this will cause it to become stuck in gear and not start.
Steve
cieranc:
Good stuff Harry, BUT>>>>>>> the problem doesn’t happen when the truck is parked up, as said if you switch the ignition off it pops into neutral.
The problem happens when the truck is running, but the air goes down quickly (airbag, chamber, suzie probelm).
The sollys need a good amount of air pressure to shift the gear solenoids, if the air goes down quickly before you can switch it into neutral/switch the ingition off, you’ll be stuck in gear.
Unless you’re actually watching the air gagues when the problem occurs, the first you’ll know is the low air pressure warning comes on the dash, by then it’s too late.
You won’t fill a unit with enough air from a tyre.
On modern units, the red suzie is fed from the trailer relay valve. So back-feeding the red suzie from another unit won’t work.
But… get an airline made with a male ‘C’ coupling end on one end, and a test point adapter on the other end, red suzie from donor unit straight into test point on unit.
On the wreckers, we carry boxes of suzie adapters for all occasions.
If the air goes down that quick, and you can’t fill it from a tyre, chances are you couldn’t fill it from the trailer either, only another unit with a good compressor - ie wrecker.
I think our wrecker had a higher output compressor than standard, if you run your wrecker without anything on the back, the air blow off valves are going off all the time, so you might struggle with a standard unit too. It’d be worth a try.
I found myself driving a 54 plate automatic Volvo FM, never driven one before. On the way up to Scotland, I pulled into a layby, when I went to pull away the air pressure had dropped an it stalled. Fair enough I thought, just restart it. Moved the gear selector to neutral and turned the key. Nothing. Then noticed the display showed it was still in gear… Queue much cursing on my behalf.
The transport office got a Volvo fitter out, in a little car derived van. He says to me that if he had a compressor or if a passing lorry had stopped, he could simply use their airline to refill my air tank and restart the engine.
He had to get under the truck, disconnect the propshaft and then did something to let me start the engine, then he had to reconnect it up before I could go.
He asked if I hadn’t been told how to use it, but agency drivers rarely are fully trained, it’s a case of get on and do.
I made sure in future that the air pressure was always well up before putting it into gear and pulling away.