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The pole car jams on the track I think because it is metal on metal and it is dry. I wonder whether lubrication would aid the process. Don't want to put grease up there so tempted to try candle wax on the track. Any better ideas?
I was replacing the plastic sliders on my Selden track car a couple of times a season. I had a good look and a think about it and concluded that they were breaking when the car hit the end stops driven by the weight of the pole, the impact was breaking the ends off the liners which then fell out. I drilled the track just above the end stop, screwed in a sturdy dome head self tapper in the centre, clear of the sliders, with a 7mm. scrap of thick plastic tubing around it to ease the impact. Seems to have solved the problem. (so far)
I had tried the car without the sliders lubricated with PTFE, it rattled about (my pole stows in front of the mast with the car pulled up to the top of the track) and still jammed.