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-   -   train goes wrong way (http://www.modelrailwayforum.co.uk/showthread.php?t=12882)

terryj 16-11-2017 08:52 PM

train goes wrong way
 
just got an hornby 751 and it goes in the opposite direction to all my other trains
is it just a case of dropping out the armature and putting back the other way around http://www.hornbyguide.com/service_s...sp?sheetid=126

jaysix 16-11-2017 09:03 PM

don't take out the armuture terry just chand over the polarity of the two wires going to it ,i don't know what your model is like dut should not be a major job
jaysix

Mountain Goat 16-11-2017 09:12 PM

I was going to say that all it is is the pick up wires to the motors need reversing. If it is DCC it can be done via the programming instead.

Footplate1947 16-11-2017 09:15 PM

Hi the polarity is wrong. Easy way to check is study the service sheet you have and make sure that all the motor contacts and the spring which holds the brushes in place are all fitted correctly. Make sure also that the small insulator on the spring which locates to one of the brushes is on the right hand side of loco as per the service sheet.

brian1951 16-11-2017 09:16 PM

Red and Black wires need switching on loco.

Footplate1947 16-11-2017 09:17 PM

Am I right in assuming that we are talking DC here. Not DCC. John

Footplate1947 16-11-2017 09:20 PM

Which wires Brian. The service sheet has no wires. John

brian1951 16-11-2017 09:30 PM

If the motor has no red and black pick up wires, the motor must of been repaired and put together with the polarity reversed or fitted the wrong way round.

terryj 16-11-2017 09:32 PM

its dc
the contacts from the wheels go straight to the motor block as far as i can tell
it has 2 wires coming from the rear wheels which would be easy to swap but the front has me baffled
judging by the state of the internals its always gone the opposite way and its made in england so i cant even blame the chinese

terryj 16-11-2017 09:37 PM

Quote:

Originally Posted by Footplate1947 (Post 143089)
Hi the polarity is wrong. Easy way to check is study the service sheet you have and make sure that all the motor contacts and the spring which holds the brushes in place are all fitted correctly. Make sure also that the small insulator on the spring which locates to one of the brushes is on the right hand side of loco as per the service sheet.

thanks will have a good ferret at the gubbins tomorrow


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