Last month I was driving a class 8 Freightliner expediter straight truck with a 96" condo. I noticed that about once a minute an air release valve would open with a hiss and the top air gauge indicator would move downward.
After about a minute, the air gauge would build up and show about 140 pounds and what I assume is a pressure safety valve would release again.
This cycle continued every minute when driving the truck for the month I was on the road with the owner/operator.
He said it was supposed to be that way.
I'm not so sure.
Another problem was that when slowing down quickly to avoid a vehicle dead stopped in front of me, a loud banging noise came from the rear underside of the truck.
We were carrying about 12k lbs. The o/o set the air pressure in the tag axle bags at 40 psi.
If I applied the brakes harder in that case, on the very rough road, the banging got louder. And so did the yelling from my boss.
I tried to brake more lightly, that seemed to help, but there was still the problem with traffic so I had to slow down.
The noice from my owner/operator continued.
What could I do to prevent that?
:'(
After about a minute, the air gauge would build up and show about 140 pounds and what I assume is a pressure safety valve would release again.
This cycle continued every minute when driving the truck for the month I was on the road with the owner/operator.
He said it was supposed to be that way.
I'm not so sure.
Another problem was that when slowing down quickly to avoid a vehicle dead stopped in front of me, a loud banging noise came from the rear underside of the truck.
We were carrying about 12k lbs. The o/o set the air pressure in the tag axle bags at 40 psi.
If I applied the brakes harder in that case, on the very rough road, the banging got louder. And so did the yelling from my boss.
I tried to brake more lightly, that seemed to help, but there was still the problem with traffic so I had to slow down.
The noice from my owner/operator continued.
What could I do to prevent that?
:'(