wiserfrombud

I am fairly certain the f8 fuse is blown then. Just have to figure out which solenoid it is.

So....this is going on... both sides of expansion tank are full. Seems to be pressurizing the tank and puking it out of the overflow. I pulled an oil sample. Not burning coolant. No coolant or diesel in oil. Coolant in tank nice and clean. Truck runs perfect. Is our money on a compressor?

And if you replace the fuse and it pops again, its likely a bad solenoid on that bank back by the 5th wheel.

Sounds familiar!

Do you have a Davco fuel filter on the frame?

There is an actual setting in the HU that automatically shuts it off every hour with the truck running and nothing is touched? Lol. If that is the case, who would EVER have that option activated? I never had the stock stereo. I ordered mine with a srereo accomodation package. 4 speakers, an antennae co ax, and a hole in the dash. I loved the fact that was an option.

My ELD told me I finally had some time to do a little problem solving. Turns out it was the F8 fuse in the top panel. That fuse controls "Air Solenoids" all 4 of those switches actuate solenoids so it would stand to reason that none of them worked. The 5th wheel slide however was the only one of the group of 4 that threw an actual code. Anyways....the bull dog is back in tip top form and everyone is happy again.

Still haven't had time to dig into this but just noticed something interesting.....that entire row of switches is dead. Inter axle,5th wheel,susp height, and air intake. Maybe came unplugged behind dash??? What would kill this whole group of switches???

My truck has been clock work since day 1! I have had 2 CEL lights come on. Both for some SCR module that is down in the front on the frame rail. It threw a code very early on, first few months and then again about a year after. Nothing since. Bad run of parts?? Who knows. And now I have had this 5th wheel slide error come up for the second time. Only other issue I have had has been the "big" timing cover in the back of the head was leaking. It was a warranty item but it took a week to fix and was supposedly a 7000 dollar (cad) job. Hope that doesn't go again! Otherwise the truck has been fantastic. 508,000 kms.

Good day. I got the lightning bolt on the dash and says 5th wheel slide fault. Any info on how to fix this? I had this happen a year and a half ago or so but Mack fixed it under warranty.

Well 22's should be able to be negotiated into the deal if you pushed for it. I dont anticipate it being a night and day difference from what you have now but every bit helps. 22 low pro tires with low rolling resistance, direct transmission....it all adds up. What hp is the truck you have now? And as i asked earlier....that is a single overdrive M drive?

Yep....shes geared looowwww. If you like 55 mph, she should do well for ya!

I wouldnt think it'd be a whole lot different. I dont know much about the M drives but im guessing the one you have now is a single overdrive??? If you are after ultimate fuel economy, just curious why you're opting for 24's? Do you require the clearance for some reason?

Now that I am looking around......is the grille and the chrome surround all 1 assembly??

Well my bulldog got its first wound this morning. I parked @ the pilot in Barstow, went inside to shower and came out to a screwed up truck. Thankfully the guy was good enough to own up to it and stick around to exchange info. He was jackknifing into a hole and hit the side of my hood with the front of his trailer. I'm still driving the truck but I'm pretty sure its going to need a hood. The chrome grille surround is toast and the grille itself is done. My question is...does anybody here know for certain if a different model of grille would fit in my CXU? I sure like the big block MACK logo with the larger bars on the Granite. I see the newer granites are different for sure as the sides seem to curve, but it looks like an 08 or so is pretty close. I see the surround is thicker but the grille looks pretty similar. It has to get changed either way so I figured why not do something different. Any info or alternate ideas are welcome Thanks.

Hmph. I'll have to keep an eye on mine. What kind of operation is that in? If I recall, the literature sold the twin Y as an over the road kind of haul 80,000 lbs type of suspension. I don't think it was intended for off road or heavy haul applications.

I would agree with the salesman. 3.7x will move freight up and down the road just fine but I would not want to be cruising @ 1400 rpm for fuel economy. I think 3.3x is much more in line.

What have the issues been with the twin Y? I have 200 000 miles on mine. It rides decent and my tires are wearing perfectly.

Disc brakes are obviously superior to drum brakes but when I ordered my 16 in the fall of 15, they were a pain in the ass to get. It sounds as though that has since been adressed. I have the twin y with Mack S 38 rears and love the set up. It's funny how Mack promotes the 400 lb weight savings on the twin Y set up, but fail to mention the Mack rears weigh a ton. Anyhow it works well together. I have a 13 sp Eaton with the 505 c+. I can't reveal all of my secrets hahaha but I will say this.....gear that truck to run and drive it reasonable and it will do well for you. These motors do very well @ low rpm.

6.6 is a nice number out of a brand new CHU. That's a good start to a profitable truck. Keep in mind we still have a few weeks of winter fuel. I will be curious to see how it's doing in a few months.

I feel his pain.......literally

Where/ how would you start estimating a projected total cost of ownership from one truck to the next? What suspension/rear set up is best? Talk to 10 people, you will get 10 different answers. I have the Mack rears and am happy with them. The M Drive IS the latest and greatest offering. It is standard on all new Mack trucks. I have a 13 sp Eaton in mine but I had to order it from factory that way. Me personally, I think I'd opt for the mp8 with the econodyne software set up @ 445 for a truck being driven by someone else.

Ouch! Mine is 18, 400 lbs with the high rise condo, and Mack rears! They were heaviest of the options. A friend of mine has a 14 CH and it's well over 20,000 as well. I just saw that is full of fuel...I don't remember what the tractor is full of fuel by itself. I own my own reefer as well. Truck and trailer stuffed full of fuel (dual 142's) DEF and reefer tank full I weigh in 36,500 lbs.

I have the "upgraded" Bostrom seats. They look awesome but are total and absolute junk.

Good morning fellow Mack owners/fans. I have not posted anything of my own for a while in regards to my 16 CXU so figured it was time for an update. The truck now has 220 000 miles on it. It has been running up and down the road, performing well, and I am very happy with my fuel economy. As some of you may know, I pull a reefer van. I run the I 15 corridor from California to the Canadian border and North. I am ALWAYS 75, 000-80, 000 lbs gross. My average for the last 220 000 miles (166 fuel ups) is 7.40 US mpg. Keep in mind that is 2 winters and only 1 summer in that number. About 2 months ago while greasing, I noticed oil at the back of the pan. Upon further investigation, I could see it was coming from higher up and leaking down around the bell housing. Knowing warranty is running out on most things at this point, I immediately brought it to my dealer. I was informed there are 2 timing cover gaskets at the back of the motor. Apparently it was the "big one" that was leaking. They said it's a major job to replace and they would need the truck for a full week! The transmission needs to come out, the timing gears come off etc.....I couldn't believe how something could be designed that would require that kind of labor to replace a gasket! It's Volvo's fault I'm sure haha. I dropped it off first thing Tuesday morning and picked it up the following Monday evening. Everything seems to have been fixed well and put back together correctly from what I can tell in the first 1000 miles since the repair so Kudos to Mack Manitoba up to this point anyways. The service advisor showed me the pages of work performed and the grand total at the bottom of parts and labor would have been 8100 CAD! Whew! Glad that still came in under warranty. Anyways, back to making money and truck seems to be running better then ever as I think it got a top end set included in the job. That's it for now. Until next time!