On the dummy bogie of the Lima Class 47 there is a copper pickup strip  on two wheels as well as the clip on the centre pin of the bogie as made for DC. Now DCC conversion black wire conection goes to the centre clip as well as the pickup strip via another wire from the centre clip.  The wheels that fit in the dummy bogie have one end for the axle metal slot (conductive) and the other slot is plastic (isolating) I  would assume the all metal wheel ends with the conductive metal side goes on the same side as the pickup strip and the wheel ends with the plastic insulating all go on the other it might sound obvious but I need a second opinion because I dont like frying DCC chips.

Before you install the DCC chip, wire the motor to the pickups as if a decoder was there and test it on a DC track or if no DC track, then use a multimeter to check all is correct.

https://www.tcsdcc.com/Customer_Content/Installation_Pictures/HO_Scale/Lima/Class_47/lima_class_47.htm

may help

Put the meter all over the relevent conections wheels wires etc and the dummy bogie is isolated from the motor in respect to wiring up a chip so no shorts, I forgot to mention the dummy bogie needed to be reassembled that's why I needed to get the wheels round the correct way got the uninsulated wheels on the copper pickup side and the plastic insulated end opposite, that also matches the arrangement from the motor bogie

Check as set up for DC with the multimeter. If it runs ok on DC you're good to go. If it's a ringfield motor on the other boogie the live wheels are on opposite side to those on the ringfield end. Unless you have live frogs you should probably have pick-up wipers on all of the dead wheels as well (driving and dummy bogies). If the length of a dead frog exceeds the wheelbase you will definitely need to either have all live wheels on both ends or rewire the turnouts to DCC.

Nigel

Hi  
 In cases like this , I refer to the web site of
 Brian Lampert  . You will find it is a wealth of information
 Regards Ted

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refers

Hi Michael,

There is some really good stuff on Osborne's website, especially the advice re different ringfield motors. My recommendation would be to use a wiring harness with a 6- or 8-pin socket rather than direct wiring of the decoder to the motor, that way you can test using a blanking plug and DC before testing with a cheap decoder (rather than an expensive sound decoder, less angst if it's fried). Not the subject of your post, but it can save a lot of grief. I would also consider using a replacement motor from http://diesel-trains.co.uk/Lima_replacement_motor_kits.html in order to take some of the grief out of making sure the motor was isolated.

The issue I've found with older ringfield-powered stock from Hornby, Lima and Mainline models (apart from pizza-cutter wheels) is that pick-up is only from one side of the bogie (or tender). OKish for DC, you really should have pick-up from all wheels for reliable DCC running, especially through turnouts unless you make sure continuity is 100%  by adding a bit of wiring. Dead frogs and frog exit rails and power-routing with electrofrogs through the contact of the point blade with the stock rail should probably be avoided even with pick-up from all wheels (which could be a problem if there are traction tires on the driving bogie wheels - Ultrascale do drop-in replacements, be prepared to wait though).

And the answer to your question - yes, conductive wheels all on one side, and the opposite side to the other (driving) bogie.

Nigel

Hi Michael

I happened to take my Lima Class 37 apart as the additional pickup wire to the  dummy bogie had come off and I had to re-solder it.

AFAIK the chassis set up regarding wiring is the same for the Class 47.



Looks like the insulated wheels are on the same side as the extra pick-up copper strip.









Hope this may help


Ed