Thank you Rich yes this is really old New Old Stock apparently! I'm sitting here looking at the registration forms and stuff about sending them in I'll have to get ahold of the parts department and see about what it'll cost to have them update this if they will!

After looking through the parts I see there's Drive Wheels I believe that that is what's missing off of my locomotive. Yes this was new my parents had it shipped back from Alaska to me when they were out on their trip but it is definitely an older model! Thank you Rich  1998 for the info!

Well it is new I I just opened it up but it seems that it must have been old stock at the store my mother and father bought this for me as a gift I've had it probably two years never opened the box! I have found a little rubber looks like a partially broke a ring I'm wondering if these are supposed to be on the drive Wheels not shown in the diagram?

With the body remove the engine only has a front power for the trucks it says Kader 8302 on the filament board on top. It is EMD GP40 Diesel Locomotive

Fresh out of the box McKinley Explorer ho set engine will barely move around the track under its own power! add a car and it stops revs up and sounds like it's spinning but will not hardly move! What can I do to get this running have it set up under the Christmas tree on a hardwood floor nice and level.