9
Assembly
STEP 5 Tighten the belt
1. Byhand, thread the spring trolley nut on the threaded shaft until itis finger tight againstthe
trolley.Do notuse any tools.Remove the screwdriver.
2. Inserta flathead screwdriver tip into one of the nutring slots and brace it firmlyagainst the trolley.
3. Tighten the spring trolley nut with an adjustable wrench or a 7/16" open end wrench abouta
quarter turn until the spring releasesand snaps the nutring against the trolley.This sets the
spring to optimum belt tension.
Nut Ring
BEFORE
1"
(2.5
cm)
Nut Ring
AFTER
1-1/4"
(3.18 cm)
Spring
Trolley Nut
Nut Ring Slot
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 Securelyattach sprocketcover BEFORE operating.
1. Position the sprocket cover over the sprocketasshown and fasten to the mounting plate with
8x3/8" hex screws provided.
Youhave now finished assemblingyour 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 #8x3/8"
Sprocket Cover
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