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Author Topic: Help please - my collet has gone all juddery .  (Read 107 times)

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Offline Robscoulding

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Help please - my collet has gone all juddery .
« on: May 23, 2020, 05:15:41 PM »
Hi guys.  Can anyone help please ?  I really like my collet. New in Christmas 2019 and it has always been a great runner.  It's developed a juddery action where it will run ok , then slow down or stop and then go again . It's Dcc fitted but all my other farish locos are ok.  Any advice gratefully received.  Thanks

Offline Only Me

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Re: Help please - my collet has gone all juddery .
« Reply #1 on: May 23, 2020, 05:17:55 PM »
Could be a loose connection, split gear or the motor on its way out



Offline Papyrus

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Re: Help please - my collet has gone all juddery .
« Reply #2 on: May 23, 2020, 05:37:10 PM »
At less than 6 months old that shouldn't happen.

Suggest you contact Colin Heard at Union Mills and ask his advice. He will probably say return it.

Cheers,

Chris

"Outside of a dog, a book is probably man's best friend. Inside of a dog, it's too dark to read."  Groucho Marx

Offline Train Waiting

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Re: Help please - my collet has gone all juddery .
« Reply #3 on: May 23, 2020, 05:42:37 PM »
I'm sorry that I wont be able to help much as I have no knowledge of DCC.

Perhaps cleaning the tyres, axles and axleboxes might help.  Also worth looking at is the tender to locomotive wire connection.  Is the wire clean and being held by the screw?  The hole the wire goes in can be cleaned using a 'Tepe' interdental brush - the pink one.

Best wishes.

John
'Why does the Disney Castle work so well?  Because it borrows from reality without ever slipping into it.'

(Acknowledgement: John Goodall Esq, Architectural Editor, 'Country Life'.)

The Table-Top Railway is an attempt to create, in British 'N' gauge,  a 'semi-scenic' railway in the old-fashioned style, reminiscent of the layouts of the 1930s to the 1950s.

For the made-up background to the railway and list of characters, please see here: https://www.ngaugeforum.co.uk/SMFN/index.php?topic=38281.msg607991#msg607991

Offline ntpntpntp

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Re: Help please - my collet has gone all juddery .
« Reply #4 on: May 23, 2020, 05:58:21 PM »
The wire connection between loco and tender can become "iffy", but that's usually simple case of loosening the screw, remove the wire and ensure it has a good clean bare end, insert back in and tighten the screw.

Presumably you have cleaned the wheels?  Being tender drive that means you have to use a manual method of cleaning the loco wheels.

Have to been oiling the model at all? If over-done that can cause dirty oil to collect in the axle bearings which impairs the electrical pickup as UM locos pass current from one side of the wheels through the axles and the chassis block.   You'd need to remove the loco keeper plate, drop the wheels out and thoroughly clean out the axles and bearing slots.    Generally better not to lubricate these bearings except with the tiniest drop of a "conductive" oil (eg. Powerlube) and even then only very rarely.


You say the locos slows and judders, but does it then start up again by itself?  That can be an indication of the DCC decoder detecting an overload and cutting out, which may indicate a faulty motor or may be a fault with the decoder installation. Was the decoder professionally fitted for you?
« Last Edit: May 23, 2020, 06:01:30 PM by ntpntpntp »
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