I'm going to go look at a 1977 18 ' hi lo. I have a 6 hour drive to do so.The present owner doesn't know any thing about manually cranking it up and doesn't have any kind of handle for it.I have never seen a hi lo before but i read the manual crank up was a option on SOME of the hi lo models and years. I didn't want to get one that could not be manually cranked up if the pump system quit working. Does any one know how I can find out if this particular trailer has a manual crank up option on it. He took it in on a trade and has no owners manual . IT DOENST HAVE A BATTERY ON IT AND HE HAS JUST JUMPED IT WITH HIS TRUCK TO RAISE AND LOWER IT A FEW TIMES. IT IS IS ONE YOU CAN MANUALY RAISE COULD SOME ONE GIVE ME INSTUTIONS ON WHERE AND HOW TO DO THIS? AND IF HE HAS NO HANDLE FOR IT IS THERE SOMETHING i COULD BRING WITH ME THAT COULD BE USED AS A HANDLE. The nadaguides only go back to 1978. Not 1977. And I don't even know what the official name for a manual crank option is called' Any one know?