Guardian ACS0 Installation Instructions And Owner's Manual page 22

Rail and Hardware Parts List
B-1 Chain
B-2 Header Bracket
B-3 Pulley Assembly
B-4 Tube
B-5 Chain Connecting Link
B16 Manual Push Button
22
B-6 Emergency Pull-Cord with Knob
B-7 Trolley Assembly
B-8 Chain Tension Assembly
B-9 Trolley Release Rod
B-10 Trolley Stop
B-11 Straight Door Arm
B-12 Curved Door Arm
B-13 Door Bracket
B-14 Sprocket Cover
B15 Well nut and bolt