Picked up this at auction and found the jack release mechanism not working. The linkage into the hydraulics at the bottom works but the linkage to the sliding collet on the large pivot bolt of the handle at the bottom does not seem to have enough range of travel to push the collet enough to release the pressure on the jack piston. Using a screwdriver as a lever in place of the collet does release the pressure. My query is is the handle dismantlable totally i.e is the main tube removable from the T handle and the base connection to allow access to the linkage?