Installation Instructions

10
Assembly
STEP 5 Tighten the chain
1. Spin the inner nutand lock washer down the trolley threaded shaft,awayfrom the trolley.
2. To tighten the chain, turn the outer nutin the direction shown.
3. When the chain is approximately 1/4" (6 mm) above the base of the rail at it's midpoint,
retighten the inner nut to secure the adjustment.
Sprocketnoise can resultifthe chain istoo 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 isopen,do notre-adjust the chain.
NOTE: During future maintenance, ALWAYS pull the emergency release handle to disconnect the
trolley before adjusting the chain.
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
Mid length of RailBase of Rail
Chain
1/4" (6 mm)