THIS UNIT LOOKS OLD. AND IS A 1/3 H.P MY PROBLEM IS THE DOOR CLOSES ABOUT 2/3 OF THE WAY AND REVERSES. HOW TIGHT SHOULD THE CHAIN BE ? IT WAS HANGING PRETTY LOW. THERE WAS ABOUT A 3 IN. PLAY IN IT (UP AMD DOWN).I TRIED TO INCREASE THE TRAVEL AMOUNT SCREW ABOUT HALF A TURN BUT PROBLEM STILL PERSIST. PLEASE SEND BOB, NORM AND THAT SPIZA FREAK, OR EMAIL ME WITH A ANSWER. THANKS
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