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Pendolino mystery - Everything Hornby. - More Practical Help - Your Model Railway Club
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 Posted: Mon Oct 19th, 2009 01:14 pm
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DW
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Hello All,

We have a strange problem with our Pendolino. It had not been used for a while and this weekend saw some running of trains. The Pendolino ran badly to say the best. It set off then kept losing power and stopping with the lights going off or if it ran it stuttered a lot.

I took the body off to see if the power wires had come off (a common problem as reported on many sites and as we have experienced on the non powered car necessitating soldering new thicker pickup wires on) but all wires were present and correct. When put back on the track it ran well - however heres the mystery in that it was facing the other way and when turned back to the original direction it went back to stopping and/or stuttering.

This happens also on the straights thus ruling out corners causing a problem. We are running DCC and there is no short when the problem occurs. All the other locomotives used so far gave behaved perfectly ranging from Mallard to Sprinters to a Class 56 sound (which has another issue I will detail in a different post).

So the mystery to solve is why does it run perfectly in either direction but when you physically turn the locomotive round on the track why does it not run at all well?

Does anyone have any ideas please?

Many thanks in advance.

David

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 Posted: Mon Oct 19th, 2009 03:10 pm
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owen69
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David,i had the same prob a while back tried all the same things you have done,
now the naughty bit, have you got a decoder tester ? because that was the prob with mine,
the decoder was faulty ran fine one way only and it was a newish one too.
just developed a fault.

:hmm:sad::cool:


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 Posted: Mon Oct 19th, 2009 06:19 pm
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mikenencini
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David,

similar to Owen.  I experienced a lot of poor running problems with my Pendolino especially under load and on gradients.  Changed the Hornby decoder to a TCS and the running improved significantly.  I still find I have to clean the wheels and pick ups on the Pendolino a lot more frequently than other locos - maybe something to do with the smaller wheels and the traction tyres don't help.



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Mike

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 Posted: Mon Oct 19th, 2009 06:21 pm
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Robert
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I hate traction tyres as I'm sure they leave more than their share of gunk on the track but at the same time I also see the necessity for them on certain models.



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Barchester
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 Posted: Mon Oct 19th, 2009 07:40 pm
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Neil Wood
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Robert wrote: I hate traction tyres as I'm sure they leave more than their share of gunk on the track but at the same time I also see the necessity for them on certain models.
The ones on the Pendolino seem to be particularly bad as I always have to clean the tracks after running it.  I tried the Pendo withoput them but it just wheelslipped.  My solution to the poor running was a Lenz gold for better control and several ounces of weight added.



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 Posted: Wed Oct 21st, 2009 04:49 pm
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DW
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Hi all,

Thank you for the replies.

Owen I do not have a decoder tester but last night I swapped the decoder from the non powered car to the powered car (the decoders do not have the normal pin connectors so at the moment I do not want to hard wire a different one). It still ran badly which suggests it is not the decoder.

It seems to be an interruption in power as when it stops if I move it slightly/press down on it then the lights will come back on until the problem occurs again - sometimes immediately or within a very short space of time.

Si its back to the drawing board and probably further investigations into the wiring. However I am just about a complete electrical numpty so it will take time.

Cheers,

David

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 Posted: Wed Oct 21st, 2009 05:54 pm
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owen69
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David at least you know the decoders are fine, from what i have just read in your post
i would go for a loose connection from the pickups,or even a broken pickup,just a thought .

:hmm:oops::lol::lol::cool:

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 Posted: Wed Oct 21st, 2009 06:00 pm
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Robert
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Can you get some extra temporary weight on top of the locomotive, a bean bag or small bag of frozen veg, see if that makes a difference. Definitely sounds like poor pickup. Dirty wheels, track, bent pickups, loose pickups, backs of the wheels dirty, although that would be unusual.



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Barchester
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 Posted: Wed Oct 21st, 2009 07:42 pm
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DW
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Thanks for the suggestions, I will try them out this weekend.

Have to wait until then as we are off tomorrow night to the Midlands, stop over Thursday with a visit to Drayton Manor (my youngest is desperate to go to 'Thomas Land' - yes thats a theme park based around Thomas the Tank Engine). Then a stop over Friday night with hopefully a visit to the Severn Vallaey Railway on Saturday when I believe Tornado is operating.

thanks,

David

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 Posted: Wed Oct 28th, 2009 07:50 pm
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DW
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Hi all,

Had a go at the suggestions this weekend (having got back from taking the boys to Thomas Land (did not manage the Severn Valley due to my eldest developing a very high temperature, cough and no inclination to do anything).

Took the wheels off, adjusted the pickups, cleaned the wheels (including the backs of the wheels) with a fibre pencil even though they looked clean and had been cleaned not long ago:oops:. Reassembled and tried it and found it now works :wow, so thank you everyone.

I will also at some stage probably try what has been suggested by someone else (I think it was on here but can'remember who) of reversing one of the sets of driving wheels so that there are two opposite sets of pickups on the powered bogie.


Just need to cure the screeching/scraping sound caused by the pickups rubbing on the backs of the wheels (not the only one to suffer from this, some of the steam tenders do this as well), which I believe can be cured by using graphite from a very soft pencil without causing pickup problems.

Cheers.

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 Posted: Thu Oct 29th, 2009 04:05 am
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owen69
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nice when things turn out ok. and the graphite is a good idea.

on the subject of things turning out ok. the prob i had with my computer,
all fixed thanks to your info and a word in the right earhole.

:doublethumb:lol::lol::cool:

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 Posted: Thu Jul 8th, 2010 01:46 am
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Sol
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Not a mystery but a question re the Hornby Pendolino.

Do the pantographs  - while they may be non-working & I assume meaning not electrically connected, do they go up & down?

 

 

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 Posted: Thu Jul 8th, 2010 12:58 pm
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DW
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Hi Sol,

The pantographs can be set to a raised position (with a bit of care) and the pick up bars (or whatever they are called) also move. The Javelin we have has a slightly better (in my opinion) pantograph.

One thing we have to remember on our layout is that if they are raised too high they smack into the tunnel entrance!:oops:


I can try to post a photo or two if you want, but it will have to wait until weekend.


Cheers,

David

PS not really made much progress or had time to post for ages due to work, a garden and house demanding too much attention, hope to be back to it soon but I would guess it will be winter before that happens,.

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 Posted: Tue Jul 27th, 2010 03:39 pm
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shep41
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Change the decoder, once this is done you will have a smooth running pendo. Trust me the decoders fitted to the pendo are rubbish. I have repaired countless number of these loco,s and once the decoder had been changed they all ran fine. If my memory serve me correctly, i gave the save info to mikenencini and it cured his problem.

Hope this helps
Nigel



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 Posted: Tue Jul 27th, 2010 05:12 pm
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pwarburton
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Hi David

I don't have pendolino and I'm not familiar with this model but I do have a suggestion.  It might be rubbish - in which case just ignore it and I'll regret interfering!!!!

How many of the wheels have pickups?  Adding additional pickups can give smoother running - less faltering - worked a treat on some of my locos.   Of course many new models now have pickups on all the wheels anyway.  You might find this website useful in this context.

http://www.bottleville.co.uk/Model%20Railways/Projects/Bach_37_pickups.htm

If this is of value - something you want to explore let me know.

Regards

Paul

 

 

 

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