I have a 2521 observation car which is giving me electrical problems. The spring for the collector mechanism in the coupling unit is shot so I need to replace it and possibly the pin used as the alignment guide. I have checked through Greenberg's which didn't address that section of the coupler. Tried on line; perhaps I didn't ask the questions correctly but in any case no joy. Can someone tell me where I can find instructions toto replace the spring or do I need to get a new 492-1 light couple unit. Thank you all and have a very nice Thanksgiving
Bill
