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Heinz  if you find one I believe there were two different gaskets don't forget to order the gasket! If its available

If the engine has an AMBC fuel pump You could try  and extra Gasket under the fuel transfer pump ! The little pump in the main pump tend to put side thrust on the pump cam and Can change the timing on number one cyl as the bearings wear! 

just something to try! 🙄

1 hour ago, The Heinz said:

I think they went away from the shim setup, but I could be mistaken, and they certainly fixed the cup issue after the early models of the engine; doesn't mean cups and injectors are flawless, we see a lot of failures there still! We have had quite a few gear train failures in MP7's now that you make me think of it. The MP10 honestly sold really poorly, at least in our area. I've only seen one truck to my knowledge with that engine.  

Do to our terrain we could have been still selling Mp10 here it is a brute pulling machine when everything works right! Volvo chose to shut Mack out on that deal! Hope your right about the shim thing stupid idea! The MP8 is set up much better a bit more mechanic friendly !

I've been out of it for a year or two But agree with your assessment mostly! Unless its changed ! What I saw and didn't like was using shims for the set of the rockers DUMB idea! Means a guy is AGAIN Tied to the dealer for a shim kit for what is normally a simple task!  Mp8 had normality to it Proper screws and lock bolts ! And aside from the Bull gear failures and Decent engines aside from the cup issue that Should be resolved by now !Of all the new engines the MP8 and 10 were basically Decent engines ! and of coarse the half baked emissions stuff! Everyone is dealing with that junk!  

10 hours ago, Rickpile said:

So it proportions air pressure to front brake cans so as to apply evenly?

It cuts the air pressure in half so the front brakes don't lock up enabling you to steer! The way I under stood it ! the auto one which yours likley is after XX amount of preasure gives all available air pressure!

4 hours ago, mp8_macky said:

Don't go with the emulators, they are worthless.

A lot of time they fail, cause circuit issues. Overall it's a waste of money.

Go with proper ECM delete tuning for Mack.
I recommend my vendor.
https://truckecmtunes.com/mack-dpf-egr-def-scr-delete.html

Just curious!

So Macky

Who does your work now if you have other engine or chassis issues?! A lot of dealers won't touch a deleted truck ! Just sayin ! What happens when you have to plug in to check something other than emission related faults !( example )  Say to do injector cups and change Trim codes ? What happens then? just asking!  I get haveing rid of this crap however there are other things to consider , just saying  Let everyone see the big picture here! I'm interested! I am Not  by any means being negative  of your choice to delete just would like to know how you deal with these other issues that arise !

So Macky

Who does your work now if you have other engine or chassis issues?! A lot of dealers won't touch a deleted truck ! Just sayin ! What happens when you have to plug in to check something other than emission related faults !( example )  Say to do injector cups and change Trim codes ? What happens then? just asking!  I get haveing rid of this crap however there are other things to consider , just saying  Let everyone see the big picture here! I'm interested! I am Not  by any means being negative  of your choice to delete just would like to know how you deal with these other issues that arise ! 

Are there an engine codes?

A while back I posted an article on these guys ! Here is a bit of an up date and the corruptness of Our governments both sides of the border! CRIMANLS in charge spewing Environmental BS and not following there own preaching's ! AND Tring to profit by it!  Angers the hell out of me! Bare in mind I can't vouch for this not being AI but wouldn't surprise me one Bit!  

check it out

Bro your experience is welcomed here ! And I believe you will be an asset ! 

On 4/2/2024 at 7:10 PM, Rickpile said:

Hello.

I have. 1980 Mack R model single axle dumptruck.

I have a Wagner Lockheed AD 80152 valve with its exhaust plumbed hard piped to a QR 1, 2 ??? valve. These 2 valve work together this brass hard piped together. It is found inside the frame rail right behind the cab..drivers side.

1) What does this valve do?

2)What is it called?

3) Servicing this valve.

4) Any ideas?

Trying to Re seal this I'm finding is near impossible. Square shouldered "O"rings and internal valve "O"rings I can not find right size anywhere. I can not find a rebuilt or new one either. Wagner Lockheed disbanded 40 years ago.. 

I have been told they no longer make such a two valve married together. 

Thx for any input you might have on this

https://photos.app.goo.gl/MRaY6GgMY7tEevJD6

It may be a front wheel limit valve Is there a limit switch on the dash? does it go to the front brakes?

21 hours ago, Joey Mack said:

The tool that you have will press the wear ring on.  I put a thin coat of RTV on the leading edge of the crank. The ring will push the RTV on and seal the ring to the crank.  Then use a lint free rag on a screwdriver to wipe out the excess RTV.  

Also something you can try is after you push the seal and sleave on put the flywheel up and on with two bolts and take it back off again before the sealant can set up!And check everything ! it maybe that the fly wheel is pushing the wear ring on farther that the installer is pushing it! A!  also as Joey and others have mentioned Do it cold with rtv or locktite  or anaerobic sealant !

4 hours ago, Joey Mack said:

I remeber the tool with the 4 clips on the side of the installer..

hoekey junk!

19 minutes ago, steeler said:

plenty of clowns

Yup there everywhere ! Don't have to look far for them! Start at the top work your way down! 🙄🤣

On 3/22/2024 at 7:06 AM, mechohaulic said:

7 pin wire connection I would assume you are referring to a light plug  socket. ? is it mounted or tied behind crossmember ? reason asking is to determine how far  factory trailer set up you have.  are there capped off air lines or an air valve near  light plug or along frame ? ? don't think on that new a truck they even use a trolly valve any more . can you access behind the dash to see the red knob checking for capped line . seeing /knowing what you have is a strong determinization of how it is connected. tractor/ trailer protection valve needed??  glad hands or quick connectors for trailer air there or needed ??

Yup go and look for a valve that looks like this! Bendix TP-3DC Trailer Protection Valve - P/N 109792 | eBay  and trace the lines! I'll bet they are there just capped off!

Ground each wire separately see which one makes the gauge work!

(Well guys I guess I'm not as knowledgeable as I thought) You Are knowledgeable You bring lots to the Table here! You also Can provide good fixes and experiences to those of us not as familiar with the MP stuff like myself!  Don't sell yourself Short! Just happy for you you got some satisfaction out of the frustration! I Think we can all identify with the situation ! Guess it comes down to, fix all the known issues before proceeding with your own thoughts! no matter how illogical it may Seem!  

7 hours ago, steeler said:

There is a function parameters reset, similar to the learned data reset. I did not run it long enough with the 1st test ecu to see if it threw the same code, But, I just pulled an ecu off of another 2015 truck in the shop, and the miss is still there with that one. 

Sooo.... For whatever reason it runs fine with a 2009 ecu, but not one with the correct year. 

I'm getting ready to put a new engine brake solenoid on it. No idea why that would cause only number 4 to miss, but I'm just about out of ideas. 

 

Glad you got it ! Who would have thought! Mind boggling!Doesnt explain the ecu swap repair though???? Not logical!

why?

14 minutes ago, steeler said:

There is a function parameters reset, similar to the learned data reset. I did not run it long enough with the 1st test ecu to see if it threw the same code, But, I just pulled an ecu off of another 2015 truck in the shop, and the miss is still there with that one. 

Sooo.... For whatever reason it runs fine with a 2009 ecu, but not one with the correct year. 

I'm getting ready to put a new engine brake solenoid on it. No idea why that would cause only number 4 to miss, but I'm just about out of ideas. 

 

Compression on number 4 would have been bad if the engine brake were the issue did u check the slaves in the rockers when you did cups? I know those were and issue at times But seems kind of unrelated  Maybe though! By what your describing and things you've tried it still sounds software related! How ever sequence of events maybe! Why does it run Instantly  ok with the older ECU! Has to be a software issue! Don't Know ! Just trying to throw out Ideas for you! I'm not a An MP guy How ever Like to see shit get fixed! Keep us posted!

18 hours ago, steeler said:

Sorry for the delay! Yes just came in today, hooked it up, and guess what! Still missing on 4!

Hooked test ecu back up, runs great. WTH. 

Surely there isn't anything parameter wise that got carried over to the new ecu causing this. I'm wishing now that I would have just programed the new ecu without transferring anything at all from the old one, but too late now. Once it's programmed, that's it, can't change anything other than software updates. 

Really scratching my head as to what would be different with these 2 ecus that could cause a miss on number 4.coming up empty in my head. 

Oh boy !🙄 that's a real head scratcher ! Does the new ECU throw up the same code! learning at limit code? Would be nice to know what that comment means!  I'm sure some guru knows something!? Is there a learned Data reset in the program for this year of truck? I haven't dealt with this stuff personally However seen it done many times! by the other guru types at our shop!

Agree ! that too! 🙄wouldn't even consider this My self! Wasn't one of Cats better Ideas!  

1 hour ago, tjc transport said:

well, since you used to be able to buy a Mack with cat engine, it is not total sacrilege.

the problem i see with the 3408 engine is availability.

Yup its as scarce as e9 if not worse! AND not as good ! They also had crank issues in my mind caused of the 60 degree throws ! If you ever seen these cranks you'll see what I mean! We pulled a few v12 Detroit's out of logging trucks here ! Retrofitted E9 ! it ran circles around the Detroit power and fuel wise and the 3408  fuel wise  it had the power but the fuel economy was in the toilet! The fuel savings with the V8 payed for the retro fit in less than 3 years!

Caterpillar Cat CT 3408B Crankshaft New Replaces: 1W5009 1W5 (dieselcranks.com)

1 hour ago, Joey Mack said:

good deal,  yes it could be more ''mechanic'' friendly..  glad you got it out with out damage, I forgot about the A/C lines..  

Yes sir and it gets worse When the Mp engines get involved! Even changing a belt is an ordeal on these doubles the time  ! They go out of there way to make things difficult! We had several Tandem Tandem Mixers here and with a body lift it makes for added frustration!