Assembly
5 Tighten the belt and install the sprocket cover
To avoid possible SERIOUS NJURY to finger from moving garage door opener:
•ALWAYS keep hand clear of sprocket while operating opener.
•Securely attach sprocket cover BEFORE operating.
HARDWARE
H8 | H9 (3) |
Spring Trolley Nut | |
| Hex Screw #8x3/8" |
| (Packed with the |
| sprocket cover) |
5.1By hand, thread the spring trolley nut on the threaded shaft (H8) until it is finger tight against the trolley. Do not use any tools. Remove the screwdriver.
(to motor unit)
H8
5.2Insert a flathead screwdriver tip into one of the nut ring slots and brace it firmly against the trolley.
Nut ring slot
5.3Tighten 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.
Nut Ring | Nut Ring |
BEFORE | AFTER |
1" | |
(2.5 cm) | (3.18 cm) |
5.4Position the sprocket cover over the garage door opener sprocket and attach with hex screws (H9).
H9
10