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Thread: reinstalling bachmann doodlebug front truck

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    Default reinstalling bachmann doodlebug front truck

    So long story short does anyone know how to put the front powered truck back in?

    Problem I'm having is the little swivel knuckle u-joint thing on the truck has a square hole that of course mates with the square shaft off the motor. But how do you line them up?

    I'm thinking the decoder has to be unscrewed from the frame?

    Any advice would be greatly appreciated.

    Thanks
    Keith
    The Northern Alberta Railways, once the 3rd largest railway in Canada.

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    Yeah, you have to get that decoder board out of the way. Too hard to finagle the driveshaft otherwise.

    -Mark

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    Thanks Mark

    Keith
    The Northern Alberta Railways, once the 3rd largest railway in Canada.

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    Whilst on the subject of the front truck. How much 'front-to-back' (not swivel, for cornering) should there be? I've an issue with my doodlebug not running 'smoothly' - it seems to 'chatter' as if it is rocking back and forth. It seems to run better in reverse than forward, but still has an issue.

    All ideas welcome.

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    Quote Originally Posted by MDB View Post
    Whilst on the subject of the front truck. How much 'front-to-back' (not swivel, for cornering) should there be? I've an issue with my doodlebug not running 'smoothly' - it seems to 'chatter' as if it is rocking back and forth. It seems to run better in reverse than forward, but still has an issue.

    All ideas welcome.
    Hmmm, that could be a symptom of a broken gear, a seemingly chronic problem for Bachmann. Check the gears for a split or a missing tooth.

    Split gears -- might as well be Bachmann's corporate logo.

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    MDB

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    Thanks for the suggestion Paul.

    I removed the front truck and examined the gears while slowly turning the drive shaft. I couldn't see any damage. I wasn't keen on opening up the mechanism (those are some very fine screws!) so I decided to reassemble the put it back together and see how it ran. Back on the track - I had NO response at all! Aaaaagh!!! (plus a few more choice descriptive words). After failing to successfully reset the decoder I realized one of the power wires had come off. I was tricked into thinking power wasn't an issue as the 'passenger area' light was on. Once the wire was soldered the test run could begin.

    I'm not sure what I did, but I'm happy to report the Doodlebug services have recommenced!

    I had previously removed the motor, but not the front truck. Maybe it just needed to be 're-seated' slightly further into the frame? Whilst I'd like to know what 'fixed' my issue, I'm still happy it is back in service.

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    Nice to it's back in service and no faulty gear!

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    It's such a crapshoot with these. I had a first-run PRR and test ran it, put it in the display case. Had it out to run a couple times, never really happy with it because it was so disturbingly noisy and was stalling as well; decided to put a Tomytec drive in it.

    Good thing I did because while I was salvaging things like the truck sideframes the wheels literally fell off because the plastic gear centers had cracked. Terminal on what was really a brand-new drive.

    But the good news is that you can really do well with a Tomytec drive in these if they do go south on you, and you'll get 8x8 drive and pickup out of it as well.
    Randgust N scale kits web page at www.randgust.com

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