M.Riddell Posted March 3, 2013 Share Posted March 3, 2013 Hi everyone, I hope I've put this in the right forum!! I've recently acquired a Hornby T9 off a certain auction site and have a wee problem. It runs perfectly well, better in fact than my other T9, but it goes in the opposite direction when I apply power! I'm assuming that this is due to the motor having the reverse polarity to the other one. The new T9 is from the Imperial Airways set as opposed to the other which is first generation issue. Both T9's are non DCC equipped. I'm a complete and utter novice when it comes to electrics and motors, but I would greatly appreciate some guidance and advice on how to make the required alterations. Thanks in advance, Mike. Link to post Share on other sites More sharing options...
Guest jim s-w Posted March 3, 2013 Share Posted March 3, 2013 Hi Mike simply unsolder the wires from the motor and solder them back the other way round. Hth Jim Link to post Share on other sites More sharing options...
M.Riddell Posted March 4, 2013 Author Share Posted March 4, 2013 Hi Jim, Thanks for the tip! Before I physically do anything, here's an image of the two chassis side by side - the new one is on the left: The wiring on the new one is a bit ropey compared with the old one and I've noticed that the little "chip" that the wires run into is the other way round; New chassis: Old chassis: When I do fiddle with the wires, should I just unsolder them, turn the chip round so it matches the old chassis, then re-solder? Is it as simple as that, or is it a bit more complicated? Thanks again, Mike. Link to post Share on other sites More sharing options...
Katier Posted March 4, 2013 Share Posted March 4, 2013 Is the power to the motor in the form of 'spade' connectors? It certainly looks like it could be. Link to post Share on other sites More sharing options...
M.Riddell Posted March 4, 2013 Author Share Posted March 4, 2013 Hi Katie, I'm not quite sure what you mean? My knowledge of electrics is almost non-existent. Mike. Link to post Share on other sites More sharing options...
RMweb Premium kevinlms Posted March 4, 2013 RMweb Premium Share Posted March 4, 2013 Hi Katie, I'm not quite sure what you mean? My knowledge of electrics is almost non-existent. Mike. Katier is asking if those fittings above & below the motor bearing with the opaque sleeve just pull off. If so just pull them off carefully, swap them over & refit - jobs done. Certainly no need to go turning the chip over. To get the loco running the correct way, you need to reverse the current. The easiest way is to reverse the positive & negative wires at the motor, in this example. For other models, it could be easier to reverse them elsewhere. The end result is identical, so the most convenient way is simplest. Edited to correct Katier's name. Link to post Share on other sites More sharing options...
bigherb Posted March 5, 2013 Share Posted March 5, 2013 It looks like somebody has rewired it at sometime. The easiest option is to reverse these two wires on the motor. I know I have marked the good chassis they where just easier to see in the picture. Link to post Share on other sites More sharing options...
M.Riddell Posted March 5, 2013 Author Share Posted March 5, 2013 OK, I've had a go at moving the connectors around, but the wire's come away from the upper one. There is a bit of lateral movement on them, but they are tight in the back of the motor - I'm not even going to attempt the lower one. Looks like the person who had it before me had the same issue as I can see a lump of solder on the upper connector, hence the non-standard wires as well. Probably the reason it came away so easily as too. Ach, weel, you buy from flea-bay and you takes your chances! There is someone who specialises in model railways over in Portlethen, so my dad says he'll take it over and have the gent take a look. Thanks for the help guys! Mike. Link to post Share on other sites More sharing options...
RMweb Premium Gwiwer Posted March 5, 2013 RMweb Premium Share Posted March 5, 2013 It can be a case of trial and error. It can sometimes be a trial that's for sure. I have a Bachmann N15 with the same problem. I know how to fix it - the devil is in the detail as I can't seem to get into the right wires to unclip and re-solder them and don't have a fine soldering iron for the moment either. But as I'm on DC I can simply remember this loco runs the "wrong" way and control it accordingly; it's not going to be double-heading with anything. Link to post Share on other sites More sharing options...
Katier Posted March 5, 2013 Share Posted March 5, 2013 Hi Mike, Honestly it's worth you learning how to solder and learn some basic electrics.. This is what I'd rank as a zero spanner job.. it really IS that easy. I'd swap the right hand chassis wires - so much easier to get at - and have the job done in about 3 minutes if that!! Just unsolder off the motor and swap them - really really easy job. Kat Link to post Share on other sites More sharing options...
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