Joey Mack

the ground wire... All the grounds are GRAY..

ok.. I'm sorry that I do not have the answer... I have the book on them, but am not able to get the info right now.. Hopefully someone can post a spec sheet.. Once again, Im sorry I cant help right now,,, Jojo

I would like to add something.. I dont know what years had this style, but, the last set I repaired for this same reason, (2005 CXN) The centering pin was actually made into the Z-Spring. You can knock them out and machine your own replacement pins, but the one that I repaired, 2 of the Z-Springs had spider cracks around the pin's, and because I was replacing all 4, the owner had me buy all 4 Z-Springs.. So if your Z-Springs are healthy, you can make your own centering 'Mushrooms' ..also, the top block on the rear axle may be worn where the mushroom goes.. The front 'X' may not have the spacer block. also take a good look at the pin that is made into the top of banjo housing. They are round, but end up looking like a 'D'.. weld it up, and grind it back in shape.. Jojo

here are 2 RD vin.'s . RD 690 S/ 023858.... RD 690 S/ 023859.. '96 model year.. I took care of these 2 trucks for 8 years.. Good luck ,,, Jojo MERRY KWANZAHANAMAS... 🍻

what is the 3rd member? do you mean the carrier or rear gear assembly? can you post the year and models of both trucks? a lot of these will fit other models, but the newer carriers and banjo housings have an extra bolt inside the top reduction housing.. ( not a big deal) and of course,,,,, we all love pictures..

Do you have an M-Drive tranny or Eaton Auto Shift, or I-Shift?? you also called it a CXU 630.. did you mean 613?

is one a 310 and the other a 310M ? (Multi speed reverse)

I was curious if the stroke of the pump was the same. Where it wouldn't be too long and bind, or too short, reducing the efficiency.. Therefore,. FJH makes sense.. and I'm really just babbling.. :). Jojo

But Cascade has "Sheeting action, for drops that Spot".

Boing!!!!!! That's the cure for E.D.

FJH.. your right about a lot, especially my not sleeping at night, waiting for the engine to crap out again.. The only backing I have is experience, and experience tells me to STAY AWAY!!!! :).

The tool that removes them has a similar action to a tail pipe expander, with knurling on the out side to grab the inside of the cup.

Yes

Try .... Tillmantools.com and Monacotools.com and Freedomracing.com... I buy E-7/ E-Tech tools from them.. jojo

I agree with you Mark.. The last Mack Dealership I worked at would refuse ANY deleted truck.. As far as the tooling, I made some comments on that early on.. Myself, I have only done about a dozen cup job's.. I saw guys do them in a few hours, but they did not use the bore protectors for the cleaning process, and skipped a couple other cleaning procedures like blowing out the journals. and they also did not run the valves after re-setting the rocker shaft. when I did them, I took twice as long to get them done, and they didnt come back for re-work.. (Proud to say it)... I stress the importance of having the section in the book to do the job, as well the tools... I WILL NOT be buying the tools to do these repairs in my shop.. I will stick with E-6 -- Aset's.. jojo

At least you didnt tell him to pull the cam instead of the rocker shaft..

I like the idea of a coolant flush.. an old timer taught me years ago to use Cascade.. It was for oil, however,. It cleans.. Jojo

Onyx,, Thank you for noticing my mistake.. I edited my post for any future reference.. Jojo

yeah i meant rocker shaft... sorry.. i got lost for a second...

yes.. If it gets worse, you can pump the primer to get fuel up.. I have loosened the return on the front and pumped til fuel was present then lock it down and pump a few more times.. then turn it over,, Keep an eye on the oil level and make sure it is not rising.. I have had over crank protection, shut the starter off before it fires up.. you may wear out the primer, but the MP-8 primer pump is replaceable, without buying the whole filter pad..

Sounds good.. Smart Idea to get all the parts ready.. supply issues have been bad, as you know.. I wish I knew of a company that makes after market cup sets, I always struggled with the idea that you had to replace the injectors, because of the cups.. Stay in touch, there are quite a few guys here that are currently working on MP engines... I ran away from them 4+ years ago.. Jojo

With all-due-respect.. If you choose to do this job,, Please get the section of the book for this repair.. It is a good bit of work, and it would suck to get it all together, and have a bad seal in a new cup.. Good luck sir.. Jojo

22mm... or 7/8" some others are 24mm... You have to remove the rocker shaft to do this job.. It would be good to have the torque sequence.. it is 13 steps.. plus the other info, like injector pre-load adjustment.. Do you have the book, or at least that section of the book.. ? jojo

Here is a useful page from my Svc. manual... notice the EUP numbers and the PIN numbers in the EECU plug.. There is a lot of info in this one picture..

Hello, welcome aboard.. ( 8-? codes are the eup's) 8-1--- 8-6.. 8-5 is the #5 EUP..8-9 is a code related to all of the EUP's. check the wires that run behind them for cracks and exposed wires. DO NOT BUY A EUP AT THIS TIME !!!............. You can also check the J1 plug on the EECU for corrosion.