Jump to content

Search the Community

Showing results for tags 'aml'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • News
    • Website News & Information
  • Real Railroads
    • Restoration & Excursion News
    • Photos & Video
    • News
  • G-Scale Forums
    • Buildings, Figures and Accessories
    • For Sale / Wanted / Trade
    • General Discussion
    • Indoor Layouts
    • Kitbashing & Model Making
    • Live Steam
    • Locomotives
    • Rolling Stock
    • Track & Layout
    • Train Shows, Clubs & Events
  • Power / Sound / Control
    • Battery Power & Control
    • Digital Control
    • Sound Systems
    • Traditional Track Power
  • Vendors - Products & Services
    • Vendors offering Products & Services
    • Find a Vendor
  • Website & Help
    • Website - General Help and Info
    • Testing

Blogs

  • Digtigs69's Blog
  • enginear joe's Blog
  • Chuck's Blog
  • andiwalker's Blog
  • brian weisman

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


AIM


MSN


Website URL


ICQ


Yahoo


Jabber


Skype


Interests


First Name:


Last Name:


Location:

Found 2 results

  1. Two years ago I bought an electric AML K4 Pacific at a swap meet, as an open-box item without factory smoke unit or working lights, knowing also that these locomotives are known for running too fast with a motor than can burn out with too much load. Now this locomotive is finally on my workbench, and the first thing I want to do is upgrade the motor. Greg Elmassian has a documented some possibilities on his site, as well as providing some tips on disassembly which were very useful, however none of his suggestions seemed perfect. The stock motor is a Pittman GM9234S017-R1, 24 VDC, 11.5:1 ratio. One suggestion on Greg's page is a GM9413-2, with a 19.7:1 ratio. This sounds perfect and it's the same physical size, but in studying the specs for torque and current it appears to be a less powerful motor than stock. Perhaps the gearboxes would be interchangeable, since it's the same physical size, but that's a big risk considering the cost of motors and the factory motor isn't exactly ideal either. So after much research, including other brands and sizes, I've decided to try a Pittman GM9236S020. I found it on eBay for only $30 + $7.50 shipping. It appears to be ideal in terms of the specs: 19.7:1 ratio, speed of about half the stock motor, and about 2.5x the torque of the stock motor. The current requirements are a bit high with a stall current of 9.64 amps, but I've got a 10 amp QSI Titan DCC decoder for it, and the continuous current requirements should be much less, with the sweet spot of the speed, current, and torque chart at about 5 amps: https://www.servo2go.com/support/downloads/GM9236S020.pdf The downside is that this motor is 0.65 inches longer than the stock motor, and I don't think it's going to fit without some additional work. There is a little room between the motor and the backhead (although difficult to measure), but I'm estimating more in the 0.3 to 0.4 inch range. However, I can't see any reason why I can move the motor forward a little. I think I can modify the motor bracket, and cut off a little of the shaft to the axle gearbox which has a universal coupling (and I don't know why, since the motor and axle gearbox are both fixed, unless it was just to made the design of the motor mount easier so it didn't have to align perfectly.) The new motor will arrive sometime next week, so I will resume work on this then.
  2. Anybody here have any photos of the AML K4? I was out of work when they were released. I have not been able to get one since.
×
  • Create New...