Are these walk in pits? If so bring the car down as low as it will go, kill the power, loosen the glove rope guard, disconnect the gov rope from the car, have the new rope on spool stand, marry the new rope to the old rope and tape it up, then start feeding the rope up and over. As the old rope comes down feed it right into a tote. And wheel it out when you're done. Most of those kone cars I've done have like a lifting eye that the gov rope ties too and it's just one nut and the gov rope loop is free of the car. I've not don't 50 landings but I've done 35ish floors that way. It doesn't take anything thing to pull the rope that way cuz it's balanced on both sides. And you have the car above you as some protection if something went sideways. I've also done it that way without the walk in pit but instead ofa tote we use trash cans and pick them out of the pit with the car and a strap at the end.
