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thundervalley

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  1. Out of curiosity where in Michigan are you located and which dealer is working with you? Im in MI too and have an 09 cxu with an mp8. 3k miles on it since purchase and dealer is telling me like 8 grand in repairs for a "miss". I could live with it if the teuck didn't come from them.
  2. I need to verify cylinder order for a 2009 MP8. I thought it was frontoback 1-6, but one document I found says otherwise and my Mack service manual does not show it anywhere I can see. Can someone verify? Thanks!
  3. I went to the dealer to see about a replacement power door lock actuator and was shocked to find out that its not offered without the window regulator assembly. Holy smokes was that unit expensive. It seemed a little crazy to me so I decided to tear it apart and see if I could fix it first. What I found was the same as a lot of other lock actuators out there and the repair was just the same. I'd love to take full credit for this but it was something I learned years ago on some forum for ford trucks. If your actuators are starting to croak then below is the fix that should work for you. There is an archaic component inside the actuating motor that degrades after a certain amount of time and no longer passes enough voltage to fully pop the locks. The purpose is to strip the actuator down to the motor, take the end bell off and replace that part with either a piece of copper or to wrap it in aluminum foil and place it back in the motor button everything back up and reinstall the actuator in the door. I'm assuming anyone reading this is somewhat mechanically inclined so I will spare the details of pulling the actuator from the door. I used a #1 phillips bit and 1/4" open end wrench to get it off the regulator without removing the regulator from the door. After that I split the casing with a basic pocket knife to get to the point of the image below. Note the mark with sharpie to make sure its put back together in the right position. Reverse it and the locks will be working opposite of each other. Bend back the tabs of the motor to get the end bell off... Here is the part that's not doing its job anymore. Pull it out and either wrap it with aluminum foil or replace it with a piece of copper of some sort. I wedged a small piece of 12 gauge solid copper into this one. Reinstall everything in the reverse order. You will use four 1/2" long #6 screws to re-secure the actuator housing together. These will screw into the same positions that the original was melted together at from the factory. This unit was off of an 09 CXU613 but is very likely similar to the model you have. Even if the actuators look different, most likely the motor inside is the same or very close to the same. This fix should apply equally. Hope this helps someone else out. It saved me several hundred bucks!
  4. Been fighting with AC stuff on my 09 CXU 613 also. For testing, there is a sensor and a switch on the AC lines. If you jumper the switch connector and disconnect the pig tail on the sensor does anything change or do you have the same issue? Mine is doing similar and it looks like its that sensor. I could shake the wires around for the clutch and it would work for a minute but I ended up having two issues with one masking the other. I just ordered the manual from MACK, let me know your findings and I will see if I can help you out more once the book gets in.
  5. Hey all. I just picked up the truck in the title, it also has a 10 speed trans. I have been out of trucking for a LOT of years, and was a mechanic well before the emissions stuff. I was very apprehensive getting into a modern diesel, but ended up getting this from a reputable dealer. Mileage is at 540k and it was an old Toys R Us fleet truck so spent most of its life with pretty light duty. Id be interested to know from anyone what spares would be good to keep on hand for this engine as well as any specific tools for diagnostics that would be good to obtain and any other insight you can offer. This looks like a really informative helpful site, that brings some solid peace of mind! Thanks!
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