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Discussion Starter · #1 ·
Just wondered if anyone has had this problem.

I carefully removed the top off my Bachmann Class 66 to fit DCC only to find on reassembly most of the plastic threads are virtually non-existant. Can anyone recommend a suitable repair/filler compound to fill the holes. Liquid threadlock (Loctite) has been suggested to me but maybe there is a better method. Any suggestions would be very welcome.
 

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Well I have found the same on one of mine can I ask is it a freightliner 66 ? as I don't have the same problem with my ews 66 and I think that it is the plastic type that dose it the green plastic isn't as good as the red.

I have thought about filling them but the problem is when you put the screw back in if the (filler what ever it is) is strong you will push it out of the way and crack the peg.

If you use thread lock you will never get the screw out again and you will definantly snap the peg off.

If you put a ferrell in you can crack the peg as you push it in.

You cant drill it out to put a bigger screw in it as you will crack the peg.

A longer screw will just go through the body.

If you can get the body on then try to wedge it at each end or on the end that wont screw down.

Any other ideas anyone ?

Pete
 

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QUOTE (Peter_Harvey @ 20 Apr 2007, 07:07) <{POST_SNAPBACK}>Any other ideas anyone ?

Pete

Send the offending loco's back to Bachmann - after all if they are defective then Bachmann should sort out the problem (& in defence of B - if they don't know about a problem they cannot do anything about it). Maybe the screws are tightened far too much on original assembly, or as you say the plastic varies.

What you don't want to do is to forget the body/chassis are not secure, pick the loco up & the chassis falls out reducing itself to its component parts on contact with the floor...........
 

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I must admit I've not had the problem Howzatt but I have a suspicion the only reliable way forward will be to fill the hole with a fine grade body filler (Milliput perhaps) and re-drill and re-tap the thread. Obviously if the screw is of the self tapping type it won't be necessary to re-tap the hole but care will be necessary to drill the correct size hole. By this I mean small enough for the screw to form a thread capable of holding the screw in place but not so small as the screw breaks out the filler and splits the post.
 

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QUOTE (dbclass50 @ 20 Apr 2007, 08:15) <{POST_SNAPBACK}>Send the offending loco's back to Bachmann - after all if they are defective then Bachmann should sort out the problem (& in defence of B - if they don't know about a problem they cannot do anything about it). Maybe the screws are tightened far too much on original assembly, or as you say the plastic varies.

What you don't want to do is to forget the body/chassis are not secure, pick the loco up & the chassis falls out reducing itself to its component parts on contact with the floor...........

Valid point dbclass50. I have read posts on other forums with regard to these screws being very difficult (tight) to undo and it being obvious once removed that the plastic thread has been stripped from the post in the process.
 

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Discussion Starter · #6 ·
Thanks for everyone's input, didn't realise this was such a can of worms.
My loco is EWS maroon so perhaps the colour of the plastic has no bearing on it's strength. I bought this model second-hand and thought that the problem may have been caused by rough handling by the previous owner, but I see that this is now doubtful. It's a pity that such a silly fault appears to be present in an otherwise very good and popular model.
 

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Just a thought and after reading Ravenser's post above and if you do follow the 'fill the hole and re-drill' method, you could always reinforce the post with a piece of bass (or similar) tube stuck on with aradite. If nothing else it should stop the screw from splitting the post.
 

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Discussion Starter · #9 ·
Yes thanks Gofer, I think Araldite on it's own built around the post will certainly beef the whole thing up.
 
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