Mack Technician

You throw it away?

1 hour ago, Curtis78 said:

If it is a wiring problem somewhere would it set a code?

So long as the wiring issue is creating an open circuit, short or taking the return signal out of normal range.

Its possible for a sensor or wire to cause a failure while staying inside normal range parameters. Not so often.

13 hours ago, Curtis78 said:

We have a 2001 Mack CH613 E-7 460 XT that I'm working on. Will not build consistent boost. Engine will suddenly build boost for 20 or 30 seconds and run great then it stops and goes back to no power. Truck doesn't have a wastegated turbo or a vgt turbo.

Checks I have made or performed.  No lighting bolt, has only came on momentarily once in three weeks.  Had some stored codes. Saved codes and then cleared.  Went through the test procedures on the codes and came up with nothing.  Fuel pressure at idle 68psi, at 1400+ rpm's 76psi. Base engine oil pressure at idle cold 60+ psi, hot at idle 22+ psi. Pressure checked air cooler and hoses, ok. Visually checked engine wiring harness and also wiggle tested some of the dash harness while the truck was driven by another driver. Also did a complete service on the engine.

Previous owner threw a bunch of parts on this truck (we just bought the truck last month)....new throttle pedal, numerous new fuel lines, new crossover valve, new turbo, etc, etc.

We took the truck to the local Mack dealer last week and they kept it all week. They swapped turbos just to check, swapped a known good ECU and ECM just to check. They replaced both timing sensors, fuel temp sensor, intake air temperature sensor, both coolant temp sensors and the boost pressure sensor. They checked, removed and cleaned the engine ground and frame ground.

It’s Halloween and this truck needs an exorcist. You’ve covered all bases...except Fred’s out-on-a-limb idea, which is where I’d go next. Stranger things have happened.

Twice this year I’ve been amazed at crackpipe fixes on our equipment. I had a little transformer on an LED light go out (with light never failing to illuminate) and back-feed high voltage to an ECM making it go crazy. This week I had a stereo shorting out causing a CAN line communication fault on a Volvo. Had the stereo not finally burned I may have never figured it out. 

31 minutes ago, OldRedMack said:

I have hit 46psi with this turbo, on the 370hp tune.

The only thing a guy can add to that level of engine performance is disappointment! 

1 hour ago, david wild said:

you guys never hauled rocks ??? real rock bodies don't have gates, well maybe for a day or two.

I'll agree, undeniably, you operate in a world of outrageously over-sized loads with Wild Heavy Hauling, but if you want to convince me this baby is street legal I'm going to need a confirming opinion from a State Trooper...…

26 minutes ago, david wild said:

I won't even bother saying it.

It’s only because we love you and want what the very best for you Mr.Wild. The American Dream.....A chicken in every pot and six howling countershafts under your drivers seat. 

1 hour ago, lyle said:

i have 08 granite, that when shifting from any low side gear it will just grind & stop . after flipping splitter it will usually go back into gear & will work beautifully till next time it does it. sometimes it just roars & makes grinding noise till it decides to work. it seems that it is splitter that is problem, can it be a dirty filter or just bad splitter.

Sounds like your going to be needing a synchro. Splitter flip may be limping the synchro along by momentarily removing the torque away from synchro so it can slide in.

3.63

3.94

4.35

4.73

5.02

5.46

5.95

6.41

7.08

8.37

24 minutes ago, Quickfarms said:

What could you carry in a dump bed without a gate and retain it with the tarp?
 

Tree debris removal? Only thing I’ve seen that kind of box used for. Usually that box would be longer and sit behind a mid-ship log grapple loader with spatula paddles on the grapple jaws. Our dealer would set up that style rigging for emergency cleanup after a Katrina event. 

3 hours ago, Nobody454 said:

H J Mohr was a big redimix co back in the day here in chicago. They shut the doors last year. Wonder if that's a relative, or something like that. Same paint scheme as the company trucks

Now your building a mystery. The town, Lac Du Flambeau is inside a Lake Superior Chippewa Indian Reservation? Not much in common with a Chicago Redimix Co.....

The Rez sovereign nation allows long term land leases to the white man. It’s nice lake country, large casino (Lake of the Torches), high-dollar resorts. Surrounded by resort towns like Minocqua. Illinois owns the Northbound lanes on Friday and Southbound lanes on Sunday afternoon. Possible H J had a resort and/or built them up there and kept a toy box? Not uncommon. 

Trying to figure out why the exhaust appears to run into a blank faced diamond plate box and then out the rear of it?

8 minutes ago, ivanuke said:

Not currently, It just has a 5th wheel on it now. I purchased it to convert to a dump truck. Will be making my own box as soon as its delivered.

Wow, 9k! If that truck is in any good condition you stole it. 

51 minutes ago, ivanuke said:

I have to say that link was an absolute treat to see. I just purchased a 2007 CV713 with a AMI 370 10spd with camelback suspension from an auction. It hasnt arrived yet but I am super excited about getting it in top shape wit the help from your infomation. I am curious if my engine has had the software upgrade? The VIN number is 1M2AG11YX7M052387. I paid 9k for it at auction and im starting to feel like I got lucky! It has 313k miles. 

Edit: Realized I have to PM MackPro and ask about software.

It’s equipped as a dump?

13 minutes ago, Maxidyne said:

That MH has been listed for quite a while. Being as cabover dump trucks are rare, I've always wondered if it was originally built for some other application and later turned into a dump. The 9 speed Eaton trans is odd for a dump truck too... What's it got for an engine?

Says E6@350 HP

1 hour ago, Red Horse said:

Talk  about a rare breed!

What's rare, the chassis or the way they have it fit with a dump?

21 minutes ago, fjh said:

Yup  Agree! And on It goes Now were having issues with the Headlights on the Anthems here !Can't keep them operating! Guess we will have a new online coarse to blame the techs for that to ! Having to rob trucks in the yard to keep Trucks on the road! the thing that is selling trucks here now is the fuel mileage . the new units appear to be Boasting some decent Numbers  Di-spite the Dollarstore fuel system they have gone with! So I may have to Stand Corrected With my prediction of poor quality on this change up !

 

Fuel savings add up fast. Our VOE’s are winning over Liehberr on fuel mileage. Simply because the Volvo’s deliver power and hydraulic flow at an idle with that D13 engine instead of the Liehberr 10 liter winding tight from key on till night parking. 

Its relentless......What company would hire the most competent CEO and intentionally surround that individual with employees instructed to make the CEO’s time with the company as completely unproductive as possible while obstructing any attempt by the CEO to make the company successful? Same money-spoiled children of privilege blew $25,000,000.00 taxpayer dollars on that unfounded Mueller investigation to play politics. 

On 10/26/2019 at 10:45 PM, MayorMC said:

I have a 2007 Cv713 with a Moffet and a Knuckle bloom attached and a 18 foot flat bed sometimes loaded with up to 20,000 in weight. How can I add some more power to my truck? I’ve seen the heavy duty Diesel tuner for $1700 but I see you guys talking about the 12B how do I update my software? Currently have 235,xxx miles on mine I work for a company who is willing to pay for the upgrades if it’s reasonable so I’m taking some time to look into this. 

Scroll back to page 1 and click AI link. It’s a step by step. Don’t be too quick to go tuner till you get your hard parts converted as per thread. PM Mackpro with your vin and he may be able to check your software level. 

13 minutes ago, fjh said:

Tech That situation you describe is Common! Blame everyone else, Is rampant from the top down A perfect example was the fuel line fiasco of the early 2000's Having everyone do a fuel line installation coarse to pass the blame on to the installer ,who had  learn how to  install  faulty dollar store fuel lines!  implemented  in an attempt to save money by the manufacturer !   Unfortunately the dealers Are learning from the BEST Buck Passers ever!  Ducking  Dodging and weaving !

Hahaha, yes, the fuel line video series and service bulletins to tell us how we must be bending #3 line to get it around the turbo protrusion plus not using proper torque tooling and thus causing all the fiery explosions! 

Volvo told me “fast stamp” installation at the factory caused the graphite lube to hydro-lock and make the MP cups/injectors not seal properly. They also said the dealership techs were the cause of much of the post-factory replacement cup failures due to mis-assembly. 

Recall the vision LCD dash boards that would fade to black if the sun shined on them and start working again after cool down. We’d replace them, then get it kicked back and have to fight tooth an nail to then finally get paid as “policy warranty”. Volvo denied any engineering flaw because the failed returns worked fine in the air conditioned, shaded, test facility. 

I’d say long standing tradition. 

22 hours ago, kscarbel2 said:

"With Strike Set to End, Mack Workers Will Return to Softening Market"

Geez, it's only been a couple of weeks and they have no significant sales anyway. They make it out as though it's been months.

 

First available scapegoat?

Our dealership was tanking after 2008 and the owner blamed it on personal hygiene of a couple mechanics and a supervisors mullet. Meanwhile the roof was leaking so bad it filled a customers uncapped engine with water overnight. 

See if you can spin the turbo with your fingers........when the engine isn’t running.

Do you know if you have a Kysor relay? From what your describing you may have one. 

if your not sure do a search on here for kysor engine shut down relay.