User's Manual

Assembly

STEP 5 Tighten the chain

1. Spin the inner nutand lock washer down the trolley threaded shaft, away from the trolley.

2. To tighten the chain,turn the outer nutin the direction shown.

3. When the chain isapproximately 1/4" (6 mm) above the base of the rail at it's midpoint, re-

tighten the inner nutto secure the adjustment.

Sprocket noise can result if the chain is too loose. When installation is complete,you may notice some

chain droop with the door closed. This is normal.Ifthe chain returns to the position shown when the door

is open, do notre-adjustthe chain.

NOTES:

During future maintenance,ALWAYS pull the emergency release handle to disconnect the

trolley before adjusting the chain.

You may notice loosening of the chain after Adjustment Step 3 (Test the Safety Reversal

System).Check for proper tension and readjust chain if necessary. Then repeat Adjustment

Step 3.

You have now finished assembling your garage door opener. Please read the following warnings

before proceeding to the installation section.

Outer

Nut

Lock

Washer

Trolley

Threaded

Shaft

Inner Nut

To Tighten

Inner Nut

To Tighten Outer Nut

Base of Rail

Mid length of Rail

Chain

1/4" (6 mm)