We had a very smart Pilot motor caravan parked next door to us. It had wind down steadies at the rear like a caravan. The elderly man driving it couldn't wind the legs down because they were seized. I went to help and found that winding was slightly stiff for the first bit, but then abruptly stopped moving well before the legs were down to the ground. The threaded rod was absolutely clogged with dried and solid dirty grease. It actually looked and felt like concrete. He said he knew that, but it was usually OK as he wound the legs down onto 2 blocks, and he had left the blocks at home to save weight. He said the vehicle had never had a habitation service since new, over 10 years ago. Apparently the vehicle service did not cover the rear steadies.