Mackpro

https://volvotrucks.vg-emedia.com/FileImageDisplay.aspx?FileId=6030&DisplayType=attachment The tool number is 88800031 but no ones seem to make it other than Mack/Volvo . However I found on the Volvo side , it list the measurements from the tone wheel tooth to outer edge of the upper timing gear cover. Just line the tone wheel teeth up to the middle of the hole use a depth mic to get a reading and choose the number of shims you need . I don’t remember the Mack bulletins showing the actual measurements, only to use the tool .

I always hated working on mack manual transmissions but as Joey said the in chassis repair can be done with the special tools but it’s still no fun . There are 3 things we have found that cause synchro failures in the Mack manuals trans . Number one thing is the set screw for the high/low range fork backing out. This is a common problem. The 107 series and early 200 series transmissions had a set screw that was drilled for safety wire. I remember the old guys rebuilding them in the 80’s using the safety wire, wish they still used it . Second thing is the stupid rear yoke bolt and washer set up . This has been a pain for years . A lot of the time we find the yoke bolt and washer missing and the only thing holding the yoke on is the pressure from the driveshaft/carrier bearing . These two things greatly affect the high low synchro. The third thing is driver error. Upshifting not so much but when downshifting and flipping the hi/low range to low at to high a speed seem to make cause a lot of bad noises. I only range shift from high to the low side when I’m almost to a full stop.

If the ports are getting clogged on the Venturi pipe where the EGR differential pressure sits it tell the engine ECM that the EGR flow is below the target flow rate. Even though the actual flow rate probably within specs , the engine ECM will command the EGR valve to open more to meet the target flow rate . So now you got more than needed EGR flow( dirty exhaust) going back through the engine. This produces more than usual soot to clog the DPF filter. I have had this happen on the MP8 even with the newest EGR diff sensor/Venturi pipe set up. Below is a picture of the newest sensor/ pipe for the MP8. I usually pull them off and clean them on the inside.

Like the MP8 engine turning tool. Part number 88800014 , $268 at Mack . Amazon is $20 . This fits all MP8’s . Unsure on MP10. All the MP7’s I’ve seen use a different turning tool.

Yes I agree 100%

Anyone with a 2008 or newer Mack or Volvo who does any work on their truck needs a coolant drain hose tool. It makes draining coolant super easy since there are no petcock drains on them anymore. Part number 9996049 , they are not available from Mack anymore and cost is $136. Type that part number into Amazon and $40. I bought mine through Mack many years ago. My buddy was needing one and called Mack and found out the price and no availability. I got him the part number and Amazon to the rescue.

We have not had any cup issues with any of our common rail engines. A few injector issues but none cup related. Still same injector cup but only 3 injectors are driven off the camshaft, which is why they fail. The camshaft/rocker arm rocks the injector back and forth eventually causing it to leak. That part is still the same but now you only have a 3 injectors to worry about leaking instead of 6. Still a crappy set up.

Do you have any Qualcomm or data logger plugged into the 9 pin Diagnostic connector??

I’ll see what I can do . I forgot I was signed in under Customer Portal .

the pattern is still the same I think they might have upped the torque valve a little. Same thing with the injectors . I believe they upped the torque 3-4 pounds

https://macktrucksdealer.vg-emedia.com/InformationListing.aspx?GroupId=536 Click on the underlined SB***** of the topic you want then click on Print/Save file to view the bulletin/info. I’m shocked Mack still has this on there .

I did not know that about the IPhone ( I have one) Mack still has some information on the MH on their E-media website. I’ll se if I can post a link. Also if anyone needs a digital copy of this book message me your email and I’ll see if I can scan it for you .

I started when the E7 had just been introduced. The old guys were bitching because they had finally gotten used to the E6 4 valve head engines. Had a really good old guy teach me lots . He was from Long Island and he used to restore Duesenburg cars when he was younger. I remember him rattling off torque specs of those engines. I wish I’d have listened to him more but I was just a 18 year older kid back then . I miss him greatly.

Last September I did 9 sets of injectors/cups in a little more than 2 weeks so that’s burned into my brain. Plus all the years at the dealership where i amassed two 5 gallon buckets of just copper cups when we were doing the change over to stainless cups., never bothered to save the stainless ones .

Mack updated the torque specs for the rocker arm shaft a while back. Some of the older books might have have the old data in them . This is only for the rocker arm shaft on the MP8. Tighten all hold down bolts to 44 ft pounds. Then one at a time, loosen and retighten to 30 foot pounds except the large single bolt in the rear , it stays at 44 for now. Then tighten all 120 degrees ( including big single bolt ) . This is 2 flats on the bolt head .

https://static.nhtsa.gov/odi/tsbs/2013/SB-10082932-6903.pdf Scroll down to the pics of the injector sealing areas. If any of the injectors looked “ unusable “ then the cup and injector needs to be replaced. This is a old bulletin but useful information. Mack now says don’t do the thread tap and pull on the stainless cups as the thread shavings were wiping out turbos left and right. Mack now has a expanding puller that grabs the sides/walls of the cup and pulls it out super fast. On copper cups you still have to use the thread and pull tool method.

Did you have install tool to form the end of the cup to the head ?

Mack issued many bulletins on the fuel filter changes. I can only screenshot them due to the new format. So I can’t really get all of it in the picture.

The Mack /Volvo filters for the common rail engines

I have also had to loosen the rear filter and remove fuel tank cap abs stick a blow gun in the tank and stuck rags around blowgun and shoot air into the tank till fuel started coming out at filter stand then tighten filter. Make sure your using the correct filter also. The fuel filters for the common rail is different and all the early MP engines. Mack only approves certain aftermarket fuel filters to work

Here’s a pic with the flapper removed and the hole clogged with black crud. Top left of picture. This is only on the common rail engines starting around 2017-2018

On the Mack common rail engines , they have done away with the fuel pressure relief valve . So any leak or issue makes them hard to start. Does it have the 2 spin on fuel filters or one spin on and the Davco filter? If 2 spin on filters, remove the rear filter and look at the bottom of the filter stand. You will see a orange rubber flapper with a metal spring wire holding it closed. See if any debris or trash is holding it open. A Phillips screwdriver can remove the flapper for a better look . Clean it out . This is where the fuel comes in from the tanks and seems to get trash stuck in there .

Is the starter turning the engine over? Go into trip data in your dash display and look at engine hours. If you only see dashes for your engine hours then the Engine ECM is not powering up or gone bad. Also the engine ECM controls the ground on the small solenoid that’s bolted to the starter.