7
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Install spacers and front idler
Lock washer 3/8
Bolt 3/8-16
Spacer
Front idler
Install chain
B) Wrap chain around front idler.
D) Attach chain to back of carriage.
A) Attach chain to front of carriage.
Carriage
Chain link
Chain
Front idler
Chain
Chain
Operator sprocket
Carriage
Chain link
Chain
Nut
For a door height up to 12': 2 spacers are required/provided.
For a door height of 14': 3 spacers are required/provided.
E) Adjust the tension on the chain.
C) Wrap chain around operator sprocket.