LiftMaster 8360 8360 Chain Drive Garage Door Opener Manual - Page 5

Tighten the Chain, Loosen the inner nut and lock washer on the trolley threaded shaft.

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Assembly 2 Tighten the Chain 2.1 Loosen the inner nut and lock washer on the trolley threaded shaft. 2.2 Tighten the outer nut until the chain is a 1/2 inch above the base of the rail at the midpoint of the rail. 2.3 Re-tighten the inner nut. Slack in the chain is normal when the door is closed. No readjustment is necessary. NOTE: Sprocket noise can result if the chain is too loose. During future maintenance, ALWAYS pull the emergency release handle to disconnect the trolley before adjusting the chain. 1/2" 5

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5
2.1
Loosen the inner nut and lock washer on the trolley threaded shaft.
2.2
Tighten the outer nut until the chain is a 1/2 inch above the base of the rail at the midpoint of
the rail.
2.3
Re-tighten the inner nut.
Slack in the chain is normal when the door is closed. No readjustment is necessary.
NOTE:
Sprocket noise can result if the chain is too loose. During future maintenance, ALWAYS pull
the emergency release handle to disconnect the trolley before adjusting the chain.
1/2"
Assembly
2
Tighten the Chain