glenmore, I certainly appreciate your help by responding. I found a flex shaft nut socket driver to try. Got one at Harbor Freight in a screwdriver set for about $5. Hopefully it will work. I tried without it earlier, using all different combinations of extensions and 7mm socket or phillips bit, and could not get anywhere. There was not enough space to turn the ratchet even if I could engage the hose clamp well enough. Tomorrow I will try again.