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MackTech

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Everything posted by MackTech

  1. MackTech
    The location in Florida is a parts distribution center PDC. There's also a PDC in Baltimore. Metalsa makes the actual frame rails.
  2. MackTech
    Are you saying the parking brakes aren't engaging with the yellow button out?
  3. MackTech
    Could be a secondary leak
  4. MackTech
    I could also be the spring brake inversion valve (I think they used the Bendix SR7 valve back then in Granites, nowadays they use the Wabco IR2 valve) there could be problems there or with any of the lines connected. On the SR7 there typically was a supply line from the secondary to a check valve on the SR7, a trigger line from the firewall, a balance line from the service relay, and delivery lines to the spring brakes. There might have been one other line that went to the front secondary brake circuit as well.
  5. MackTech
    Data is vehicle specific, I would double check the connections at the ECU to make sure there are no bent pins.
  6. MackTech
    You can actually tell by looking at the wires for the switch connector you're thinking of using. Look at the wires and look for an F before a number. There will be other letters and numbers.but look for something like F65
  7. MackTech
    You can get a "service cab" from the Mack Customer Adaptation Center in Macungie.
  8. MackTech
    Not trying to be a smartass, but did you pull out the pin that keeps the spring brake off?
  9. MackTech
    Does your truck have traction control? If so the traction control valve could be bad.
  10. MackTech
    Fuse for the ECU might be blown
  11. MackTech

    mp7

    MackTech replied to markrandi's question in Mack Truck Q & A

    Just the tube from the oil pan, is just like an airline. Push the retainer towards the oil pan and pull the tube out.
  12. MackTech
    You always have the Allison 4700 option too! It's a 7 speed (deep reduction first gear & a very deep reduction R1 -17:1 ratio)
  13. MackTech
    "Jack" Mack is a GU MP-8 with an MP-10 turbo which puts out 800 hp with 2800 ft/lbs of torque. Unfortunately it's not a production engine. It's a one off made as a "show" truck. I'm wondering why Mack doesn't offer it. If an MP-8 can do 800 hp, there's no telling how much can be squeezed out of an MP-10. Though the torque curve is pretty much from 0-2,800 but with that kind of power, why the hell not.!
  14. MackTech
    A solo clutch does self adjust after you initially set it
  15. MackTech
    Could have wiring problem on your trailer, causing it to backfeed, which is tripping the ECU. Has it ever worked without that problem when hooked up?
  16. MackTech
    There is a turbo from an MP-10 on it and it's on a regular standard GU frame. There is unique programming in it as well. The pickup bed is still a ways away yet.
  17. MackTech
    It is a one of a kind being made for the plant. It is a GU712, all wheel drive, MP-8, 800 hp, 2800 lbs. of torque, and is having a custom pickup bed installed.
  18. MackTech
    Very nice!
  19. MackTech
    Yes it only operates the rear service brakes, if you have a brake application pressure gauge on your instrument cluster, it may help you gauge the amount to pull down to brake enough. You have a straight truck truck, correct? Or do you have a full trailer application?
  20. MackTech
    There's also a setup where you can have a "dual function hand control", which will allow the truck service brakes to work with the hand control and when the red button is pushed in it works for the trailer service brakes. Right now there are two different types that you can get from the factory. One that is momentary and one that can be locked "on". But by all means, it isn't to be used as a parking brake.
  21. MackTech
    There's also a setup where you can have a "dual function hand control", which will allow the truck service brakes to work with the hand control and when the red button is pushed in it works for the trailer service brakes. Right now there are two different types that you can get from the factory. One that is momentary and one that can be locked "on". But by all means, it isn't to be used as a parking brake.
  22. MackTech
    If it is a new door you may need to bend it like I stated in my earlier post............
  23. MackTech
    If it is a new door you may need to bend it like I stated in my earlier post............
  24. MackTech
    Get engines were the last true Mack engines
  25. MackTech
    The CHN and CXN both used the MP engines, like their vocational counterpart the CTP

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