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Author Topic: Early G/F loco  (Read 1316 times)

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Online east anglian

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Re: Early G/F loco
« Reply #30 on: June 14, 2020, 11:14:04 PM »
I   have   3   off   these   2  black   and   the   blue   G E R   all   have   the   original    can    motor   and     they      are    all    very    good   runners,  the  reason   a    lot   of   these   Holden   tanks   lock   up   or    don't   run    is    because  the    connecting    rods   are   out   of   sync   with   the   drive    gear,   

Offline PGN

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Re: Early G/F loco
« Reply #31 on: June 18, 2020, 10:11:51 PM »
But the coupling rods on this model are just spanners which are held in place by plug-in plastic pins. How can they be out of sync?

I suspect that far more often the problem is 50 years of over-oiling has left the gear train hopelessly gunged up. I've just worked wonders on an Arnold locomotive of similar vintage by cleaning all the old gunge out of the gear train and cleaning all the carbon deposits off the commutators.
Pre-Grouping: the best of all possible worlds!
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I would rather build a model which is wrong but "looks right" than a model which is right but "looks wrong".

Online east anglian

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Re: Early G/F loco
« Reply #32 on: June 19, 2020, 08:50:04 AM »
Yes   they   are    held   on    with   so    called   spanners    but   if    the    driving    cog   is   only   one     tooth    out   it    wont    run   

Online ntpntpntp

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Re: Early G/F loco
« Reply #33 on: June 19, 2020, 09:07:37 AM »
But the coupling rods on this model are just spanners which are held in place by plug-in plastic pins. How can they be out of sync?

Easy.  A wheel can twist round on the axle, making the quartering go out of sync. They should be a tight fit but abuse or over-oiling can cause the fit to loosen.
Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

Offline PGN

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Re: Early G/F loco
« Reply #34 on: June 19, 2020, 09:32:51 AM »
Ahhhhh ... got you. Yes, that would make sense.
Pre-Grouping: the best of all possible worlds!
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I would rather build a model which is wrong but "looks right" than a model which is right but "looks wrong".

 

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