Mackpro
-
Posts
2,942 -
Joined
-
Last visited
-
Days Won
10
Content Type
Profiles
Forums
Gallery
Events
Blogs
BMT Wiki
Collections
Store
Posts posted by Mackpro
-
-
Mack service bulletin SB-214-017 covers testing the testing the wastegate. It’s pretty detailed on testing and when it should be opening and staying closed. Be sure to pressure test the complete intake system. Thoses years had paper intake manifold gaskets that were later changed to steel core gaskets due to blow outs. The air compressor can get its fresh air from the back of the intake manifold. This metal pipe and hoses can leak which leak boost pressure. Unit pumps and injectors are wear items and can weaken over time.
-
Your on the right page , you have to you have to scroll the slider down on the right hand side of the screen to see the bottom of the screen. It might be called something like SCR re-set but it’s with the DEF dosing test. Is this an actual version of Tech Tool or a bootleg copy?
-
If a pre OBD 9 pin , it’s under “Test” then go to “Intake and Exhaust”, then I believe “SCR test” scroll down and it’s at the bottom of the page. You have to have the DEF doser loose as it will dose DEf fluid when it does the re-set.
-
Is the diagnostic connection a round 9 pin or rectangle 16 pin OBD connector?
-
Does your 470 CCRS have a wastegated turbo? Over here in the states our 2001.5 to 2003.5 CCRS 460 had a wastegated turbo and was a royal pain to get it to run right . We detuned several to 427 and replaced the wastegate turbo with a standard 427 turbo and no issues. With the 460 CCRS program over here, the engine ecm looks at the boost pressure sensor readings at different engine load, throttle pedal and other sensor readings and there is a narrow band of what the boost pressure readings would be. If the boost is not in the correct range then the engine pulls the fuel back and usually sets a fault code. When all was correct they ran great , if not then it was about like having. 300 or 350 hp.
-
If you got a VMAC 1 truck then you definitely need the Vmack 1 cartridge. The Heavy Duty cartridge had the individual chips. We had the “credit card chips” for the VMAC 3 for the early Etechs and a Detroit 60 card and possibly maybe some Abs cards for Waco and Bendix. The VMAC 3 cards didn’t work very good on the ASET engines .
- 1
-
eBay is usually the best bet . The guys that I know that have the ProLink stuff treat it like gold.
-
- Popular Post
- Popular Post
On trucks where the air compressor gets it’s fresh air from the piping between the air filter housing and the turbo, we see guys running dirty air filters and the engine is sucking for fresh air so hard it pulls oil up past the rings on the air compressor which pumps it into the air drier/air tanks. Very common on the 2003.5 -2007 Aset Ac engines . Could also happen to any truck with air compressor getting its fresh air this way.
- 3
-
Yes , if the dash cluster software update was done It should buzz when the diff lock is engaged.
-
Here the bulletin, click on view file . https://macktrucks.vg-emedia.com/ProductDetail.aspx?ProductId=11698
-
If an MP8 then you can easily pull the elbow and hose off the EGR cooler outlet ( towards the front of the truck) and look directly into the EGR cooler and look fir dried and crusty antifreeze. MP7’s are harder to do because you can’t get the EGR cooler outlet pipe out of the way with out pulling the fan clutch to look inside the EGR cooler. There is a radiator pressure cap on the left side ( not the right side) of the coolant expansion tank on top off the radiator . It has a small overflow drain hose on it . If the cap is blue it needs the new black cap on it . If it has the black cap , get a 1 liter clean Sprite bottle and put the end of the hose in the bottle ans zip tie it up and run the truck for a day . See if it’s actually blowing the coolant out or burning it,
- 1
- 1
-
MP7 or MP8? And are you sure it’s a GU and not a CTP?
-
The local Kenan gas tanker trucks had those transmissions in them many many years ago. I went on many late night service calls due to the drivers leaning over on the gear shifter and the shifter would pop out of the slot for the shifter fork. We finally found out if we left the gasket out and just used RVT/silicone the shifter would stick down in the top cover just far enough to keep this from reoccurring.
- 2
-
3 hours ago, fjh said:
Was this a Mack unitized hub OR jobber axle? just askin!
All of our trucks have had the FXL axle with sealed hubs . Our new 2024’s have went back to the old Eaton looking axle with oil bath hubs. I’m not thrilled.
-
-
-
Make sure the little valve cap is on top of the exhaust valve , Item 3 in this picture
-
-
Lots of items have been dropped from the extended warranty plans. We max out the extended warranty on the trucks here and things that used to be covered in our 2016 extended warranty plans are no longer covered in our 2021 plans. Sometimes the salesmen dont not go over the fine print on the extend warranty.
-
Mack SB-213-027 is the bulletin. This only applies if you have the Jacobs/J-tech engine brake.
-
If you have the Jacob’s engine brake . The floating pin in the exhaust yoke is worn. I’ll see if I can find pics. This was a big issue and new hardened adjustment pins came out with a special coating on them .
-
2004 was the first year and only year for they crammed Aset AC engine in the CH/CX the results were not good . Lots of over heating issues, we were changing fan belts every oil change due to the under hood heat causing belt failure. Things eventually got sorted out with parts updates and service campaigns/recalls. By 2005 the CHN/CXN came out and problems decreased. I do remember seeing the fan clutch surging you described but don’t remember the cause or repair. The fan clutch used on the ASET AC look exactly the same but are different part numbers, so the incorrect one could be installed. Troubleshoot on the fan clutch https://pdf4pro.com/cdn/service-bulletin-mckenzie-tank-lines-a3dd0.pdf
- 1
-
Is this a RD?
-
There was an older service bulletin on the 4094 that was very helpful but I don’t have it with me. Something often over looked is the EGR system, mainly the EGR differential pressure sensor and it’s common problem of port clogging. There are updates for the MP7 venture pipe, tubes and sensor. When the ports clog the Engine ecm sees low EGR flow and commands the EGR valve to open more and can cause the 4094 code. DEF usage and dosing percentage varies based on engine load and other factors so don’t look to much into that. Also on pre-OBD ( 9 pin diag connector) I was told by Mack Tech Support that the nox readings that you see might not be always what the actual readings are and what the ACM actually sees. Also the exhaust stack outlet should be clean with no soot or darkness. Any soot passing the DPF will cause high NOx . The pre-OBD 4094 and the 2013+OBD P20EE00 codes are pretty much the same. Which is their way of saying “ You got high NOX and we don’t know why and you figure it out”. Usually on OBD trucks the the outlet nox will be 1/3 of the inlet when dosing. Message me your email and I’ll see what bulletins I can find to send you.
- 1
Issues with PTT on CXU 613 Mack Emissions system
in Engine and Transmission
Posted
I’ll see if I can screenshot it off my PTT tomorrow