Maxxforce 13 the good, the bad, the ugly?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Jas, Apr 7, 2012.

  1. Sportster2000

    Sportster2000 Road Train Member

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    The ISX 15 uses the front gear train. The ISX 12 uses rear gear train. The mid range engines I believe are all rear gear train.
     
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  3. Jfaulk99

    Jfaulk99 Road Train Member

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    So pulling a cam involves pulling a motor?
     
  4. Pablo-UA

    Pablo-UA Road Train Member

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    Really not. With cabover you can do it with cab tilt, with conv. design trucks hatch from cab may be removed. Have you ever work on family van? yep, the same way
     
  5. Pablo-UA

    Pablo-UA Road Train Member

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    BTW, Mercedes V-designed engines - rear gears, new Volvo - rear gears, MAN TGA/Maxxforce - rear gears, Scania XPI 12L - rear gears.


    really ISX 11.9 is not based on ISX 15. I'd say it is Scania XPI for USA. Fuel system is totally different, mechanically different engines, really different. Scania XPI got rear end mounted compressor, on US trucks compressors are generally in fron end of engine, so Cummins adds one more front gear
     
  6. Jfaulk99

    Jfaulk99 Road Train Member

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    Yea just what I want, a greasy mechanic INSIDE my truck doing engine work. No thanks.
     
  7. rocket13

    rocket13 Bobtail Member

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    Is there anything specifically you are looking for?

    The statement about cam timing is not correct. They (Intl) had an issue with a supplier providing incorrectly timed flywheels (very small batch) but there's no way to "jerk" it out of time.
     
  8. Sportster2000

    Sportster2000 Road Train Member

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    No it doesn't. The camshaft has a gear on the back of it and also on the front of it. The front gear on the camshaft is to drive the air compressor. You have to unbolt the rear gear of the camshaft and then you can pull it out of the front of the engine. You just need to be able to get access to the rear gears to undo the cover and the bolts holding the gear on the camshaft which is easier said then done.
     
  9. Jas

    Jas Medium Load Member

    Not after anything specific, just wondering what the common failures are? are there any jobs on the engine are overly difficult? do they have many electrical issues? stuff like that.

    The cam timing thing is something I heard word of mouth, I have since obtained a service manual and counldn't really see how that could have been possible so thanks for clearing that up.

    I have read in the service manual that the CT13 has jake brakes, I thought the Maxforce 13 had an exhaust brake only?
     
  10. rocket13

    rocket13 Bobtail Member

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    Common failures - EGR valve, exhaust tubes to the cooler and the egr cooler itself...all require pulling the dog house. Cooler (on a ProStar, anyway, not sure what the Cat trucks will be like) is an 8+ hour job. Other failures are the typical things you'll see with any company. Exhaust tubes leaking can melt the EGR valve wiring, which should just be a splice kit.

    Yes, the 13L has Jake Brakes. There is also a Pac Brake exhaust brake; however, it is used for back-pressure control (emissions reasons) and never functions as a legitimate exhaust brake.

    Aside from the EGR issues, it's a very solid engine.
     
    Jas Thanks this.
  11. nate41102

    nate41102 Bobtail Member

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    I have been working on these engines for around 3 years now we see ALOT of them, most common problems as stated above are, egr valves, coolers getting plugged up, egr bellows and exhaust manifolds leaking. which manifold gaskets are a HUGE pain. There was a issue with the high pressure fuel pumps cracking on the fuel outlet to rail fittings. but there was a recall on them. other then that nothing more then any other engine, occasionally a injector goes down. At our shop we have had prob 10 or so with dropped valves and a handful have had a rod let go and come out of the block. one of our other stores has had severe catastrophic failues also.
     
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