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Assembly
STEP 5 Tighten the Belt
1. By hand, thread the spring trolley nut on the threaded shaft until it is nger tight against the trolley.
Do not use any tools. Remove the screwdriver.
2. Insert a athead screwdriver tip into one of the nut ring slots and brace it rmly against
the trolley.
3. Tighten the spring trolley nut with an adjustable wrench or a 7/16” open end wrench
about a quarter turn until the spring releases and snaps the nut ring against the trolley.
This sets the spring to optimum belt tension.
HARDWARE
Nut Ring
BEFORE 1”
(2.5 cm)
AFTER 1-1/4”
(3.18 cm)
Nut Ring
Hex Screw #8x3/8”(Packed
with the sprocket cover)
Sprocket Cover
Hex Screw
Spring
Trolley Nut
Nut Ring Slot
To avoid possible SERIOUS INJURY to nger from moving garage door opener:
ALWAYS keep hand clear of sprocket while operating opener.
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 screws provided.
STEP 6 Install the Sprocket Cover
You have now nished assembling your garage door opener. Please read the following
warnings before proceeding to the installation section.
13
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