Dmurph2016

There’s a tire fill port on the primary air tank, if I can fill it from there? So I’ll need to replace the cutoff? Yes, the gauge is going to drop with the truck off and dropping the axle. But after sitting for 2-3 hours the axle is down as it’s lost too much air, so there has to be something leaking pretty good somewhere in that system. The other system loses air but not at that rate. Although with the truck off and press the pedal you can hear air from the back of the truck. So I’m making progress.

I just went out and looked and I’m not seeing it. It’s also getting dark out so that may be a factor. I’m sure it’s right in front of my fave and I was looking right at it

I have to look for the air dryer, I don’t know where it’s located.

I have to figure out exactly what fittings I need and track some down. Hopefully in the next few days I’ll be doing that.

So I only had a few min today to use the soap and water before the weather turned to rain, but here’s what I got done. stsrted the truck and let it air up until the governor shutoff. Shut the truck off. Could hear some air leaking from the front of the truck, o opened the hood and started spraying airlines. Not exactly sure what this thing is or does but it was bubbling at the red part. Secondly I confirmed that when I flip the switch to drop the lift axle, the green needle dropped. So it seems that there’s a leak somewhere in that system and when it loses pressure, the axle drops. It’s a start. Hopefully when the rain stops o can lift the bed up and start checking under there. As well as the brake cans as I have a feeling that could also be a culprit

That is what I am working on, have to look and see where the fitting goes and what exactly I need. Have to look into that a bit more

I think it will be once I can track down/stop some of the air leaks!

If I make a fitting and hook it up to an air compressor does the pressure release or will I have to shut the air off myself? What exactly does airing up with a compressor do? I’ll have to look into it a bit more as I’m not exactly sure what fitting I’ll need or where they go.

Sorry forgot to mention. It’s a 03 tri axle dump. I don’t have an air compressor but I’m sure I could borrow one.

I’ll have to check if I have an air operators engine fan, I have no idea to be honest. But I’ll be out there with soap tomorrow trying to see what I can find! Oh yeah, tomorrow will be fun trying to chase down leaks. I’m guessing for the lift axle to drop that fast it would have to be a pretty big leak.

When I get it cleaned up I’ll post some pictures! When I shut the truck off in the front engine area I can hear some air, but was told that since it’s air ride it’s the bags settling. Not sure if that is part of the leak. I’m going to get a spray bottle and start checking all the hoses and whatnot but figured I would ask as maybe there’s some common areas that leak and that would give me a bit of a head start!

With the truck running I don’t believe the pressure drops, will have to confirm later. But I parked the truck, both the needles were at 120 or so. Shut the truck off, went inside. I came back out about 2 hours later and the lift axle has dropped (it was previously in the up position) and the green middle had dropped to about halfway in the red. The red/orange needle had not moved. So I would say it’s a separate system. But, I wanted to check something so I held down the brake petal and the pressure of the red needle dropped like a sack of potato’s. I don’t have much experience with trucks, but I am willing to learn and appreciate any help, no matter how small it may seem.

I am going to get soap and water and start looking, but figured it can’t hurt to ask if anyone has suggestions on where to start. Green needle Would be primary correct? I have an obviously big leak if it dropped for 130 to the read in less than 2 hours. being that the truck is air ride, does that have anything to do with it?

So I just had my new to meet truck dropped off. It’s a 03 elite cl700. It’s been sitting for 2 hours now. The airgage has dropped. The orange needle hasn’t moved but the green needle has dropped from 130 to halfway in the red. Also my drop axle has dropped. I am assuming these 2 things are related. Where would I start looking for air leaks? Im a total noob to this so I have to start somewhere. edit* so it also appears I have leaks behind the dash. I moved the hvac vent controls and now on whatever setting it is on I can hear air. Thanks

Hey everyone, I wanted to drop by now that I have gotten my first truck to learn a bit and hopefully fix any problems that arise. I purchased a tri axle dump truck and my plans are to do asphalt with it this season. I currently don’t have my cdl ( I know doing things backwards) but I am taking the class here shortly. I purchased a 03 cl “elite” series. With the 427 Mack motor and a 8ll. Just figured I would write a quick post to introduce myself so if you see me asking a bunch of questions, you know why!

I’ve never understood why the DM series has the strange cabs, does anyone know the reason for it?

So I’ve saved up a bit more money for a Rolloff truck. I found a 08 pinnacle 13sp mp8 with 172k miles on it. Just looking for some info on the common problems with the motor and year. thanks

I’m wondering if a block heater can be added, I think in the winter it would really help starting

Dumb question, but did all trucks come with block heaters? Or is that an option?

So there’s a few trucks that I want to look at, they are about 6 hours away thought so I need to learn as much as I can first 1: 2000 Mack rd688 with 770k miles 2: 2001 Mack rd600 with 239k miles with an new reman engine (supposedly) 3: 1997 Mack rd688 with 380k miles 4: 1988 Mack rd688 with 700k miles 5: 2000 Mack rd688w with 421k I think the lowest mile truck would probably be the best but I’m not sure how many miles is too many to consider

I’m looking to buy a Rolloff truck and am looking for some info on the e7 motor in Mack’s from 1997-03 those are the years I’m looking at. I’ve found a few trucks that the mileage Ranges from 200-300k miles and 300-800k miles. How many miles can these engines go before a rebuild? Should I avoid the higher mileage trucks? thanks!