Instructions / Assembly

9
Assembly
STEP 5 Tighten the chain
1. Spin the inner nut and lockwasher down the trolley threaded shaft,away from the trolley.
2. To tighten the chain, turn the outer nut in the direction shown.
3. When the chain is approximately 1/4" (6 mm) above the base of the rail atit's midpoint,
retighten the inner nut to secure the adjustment.
Sprocket noise can resultif the chain is too loose. When installation iscomplete, you maynotice some
chain droop with the door closed. This is normal. If the chain returns to the position shown when the
door isopen, do not re-adjustthe chain.
NOTE: During future maintenance, ALWAYS pull the emergency release handle to disconnect the
trolley before adjusting the chain.
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)
STEP 6 Install the sprocket cover
To avoid possible SERIOUS INJURY to finger from moving garage door opener:
l ALWAYS keep hand clear of sprocket while operating opener.
l Securely attach sprocket cover BEFORE operating.
1. Position the sprocket cover over the sprocket as shown and fasten to the mounting plate with
8x3/8" hex screwsprovided.
You have now finished assembling your garage door opener. Please read the following warnings
before proceeding to the installation section.
Hex Screw #8x3/8"
(Packed with the sprocket cover)
HARDWARE
Hex Screw
Sprocket Cover