Noisy Bachmann loco

 
  antiussentiment Locomotive Driver

Location: perth
Hi there,

yesterday, the loco Superintendent picked up a new 45xx (GWR small prairie).  It looks lovely.  But on running it has a noticeable growl that actually cycles with the driving wheel rotation.  The growl disappears going down a grade and is more noticeable in a climb.  We did the 30 minutes, unloaded, each way at moderate speed "run in" (like Bachmann suggest) but this did not ease the problem.

We got a Bachmann 64xx a few months back and it runs silent.  The first loco on the layout, a Hornby 49xx, runs beautifully silent.

We also have an old 14xx that we picked up 2nd hand.  This sounds like a 2 year old shaking a box of marbles.  But we're cutting it some slack as it's decades old.

So my question is, How quiet should you expect a new loco to be?

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  comtrain Chief Commissioner

Location: Near Albury Wodonga
Hi there,

yesterday, the loco Superintendent picked up a new 45xx (GWR small prairie).  It look lovely.  But on running it has a noticeable growl that actually cycles with the driving wheel rotation.  The growl disappears going down a grade and is more noticeable in a climb.  We did the 30 minutes, unloaded, each way at moderate speed run in (like Bachmann sugest) but this did not ease the problem.

We got a Bachmann 64xx a few months back and it runs silent.  The first loco on the layout, a Hornby 49xx, runs beautifully silent.

We also have an old 14xx that we picked up 2nd hand.  This sounds like a 2 year old shaking a box of marbles.  But we're cutting it some slack as it's decades old.

So my question is, How quiet should you expect a new loco to be?
antiussentiment
Modern model engines should be quiet. They need to be, particularly as so many are fitting sound to them these days.
Easiest thing would be to take it back and ask for another one, after all the 64xx runs quiet, so should this one. However if it is not an easier option for you , you might check the alignment of the gears, even release motor and make sure they are meshing properly? That is if its just too difficult to take it back Smile
Cheers
Rod
  antiussentiment Locomotive Driver

Location: perth
@comtrain Thanks for the comments.
It's what I expected, but gathering opinions is always useful.
  antiussentiment Locomotive Driver

Location: perth
A follow up;
I took the little prairie back and we ran it and the other one they had in stock on their test track.  There was a NOTICEABLE difference.  So I left with the other model.

After some googling, I found that the mechanism in this model is one of Bachmann's older designs.  So is a little noisier than other new locos.  But the replacement prairie I picked up is much much better than the first one.

Thanks to the young bloke at the POS at Perth Hobby Center for his understanding and helpful attitude.
  comtrain Chief Commissioner

Location: Near Albury Wodonga
A follow up;
I took the little prairie back and we ran it and the other one they had in stock on their test track.  There was a NOTICEABLE difference.  So I left with the other model.

After some googling, I found that the mechanism in this model is one of Bachmann's older designs.  So is a little noisier than other new locos.  But the replacement prairie I picked up is much much better than the first one.

Thanks to the young bloke at the POS at Perth Hobby Center for his understanding and helpful attitude.
antiussentiment
That's a pretty good solution then.
If its an older design, I wonder if it has metal worm and gears fitted?  If it has, that would be a reason for the noise.
Over 30 years ago, we used to run in noisy gears with toothpaste Wink
First scrub the metal gears with metho or alcohol and remove all lubrication. Gently run engine with jumper clips. Listen to it.  Coat surfaces with cheap toothpaste (more likely to have abrasive content) or use motor reconditioning fine valve grinding paste and run motor for an hour polishing up gear surfaces) wash and clean up all paste, lubricate with labelle metal gear grease, and run it for a week or so, and see if it improves. Repeat once more if it hasn't, run longer to polish it more and see if you have improved the mesh.
But hopefully it is quiet enough for you already Smile
Cheers
Rod
  Heihachi_73 Chief Commissioner

Location: Terminating at Ringwood
My 1994-vintage Bachmann F9 (Santa Fe 307) rivals vacuum cleaners for noise output. Runs like a charm too, although looking at the body you'd think otherwise. Smile

And yes, it's the old type with the pancake motor, traction tyres and horn hook couplers (however the horn hooks were thrown out years ago in place of some Kadee 148s).
  David Peters Dr Beeching

Location: "With Hey Boy".
Those Bachmann models with pancake motors were a lot quieter than the original Bachmann models that had metal everywhere inside them The chassis was two pieces of metal with the motor and gears etc in cut outs in them with a piece of metal over the top screwed on to hold the motor etc in place. The gears were all metal as well. The only good part of them was that they were all wheel drive and all wheel pickup as well. They weighed a fair bit but could pull like the proverbial bull in springtime! Howl you could hear one even if you were stone deaf.
  antiussentiment Locomotive Driver

Location: perth
Over 30 years ago, we used to run in noisy gears with toothpaste Wink
First scrub the metal gears with metho or alcohol and remove all lubrication. Gently run engine with jumper clips. Listen to it.  Coat surfaces with cheap toothpaste (more likely to have abrasive content) or use motor reconditioning fine valve grinding paste and run motor for an hour polishing up gear surfaces) wash and clean up all paste, lubricate with labelle metal gear grease, and run it for a week or so, and see if it improves. Repeat once more if it hasn't, run longer to polish it more and see if you have improved the mesh.
But hopefully it is quiet enough for you already Smile
Cheers
Rod
comtrain
Hey that's a great Idea..
I have an old 14xx that is pretty noisy.  I stripped it down, cleaned everything and greased the worm drive and it's loads better..  But I'm so going to have a crack at the valve grinding paste idea at some point.

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