Tighten The Chain - Chamberlain C203 Owner's Manual

Chaiin drive garage door opener
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To Tighten
Outer Nut
Chain
Base of Rail
Mid length of Rail
Trolley
Outer
Lock
Threaded
Nut
Washer
Shaft
To Tighten
Inner Nut
Inner Nut
1/4" (6 mm)

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This manual is also suitable for:

C400C410

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