LiftMaster 8557 8557 Manual - Page 4

Assembly, 1 Attach the rail to the garage door opener - model

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Assembly 1 Attach the rail to the garage door opener To avoid possible SERIOUS INJURY to finger from moving garage door opener: • ALWAYS keep hand clear of sprocket while operating opener. • Securely attach sprocket cover BEFORE operating. To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of the opener. HARDWARE Washered Bolt 5/16"-18x1/2" (Mounted in the garage door opener) Model 8550 (2) Model 8557 (1) Lock Nut (Mounted in the garage door opener) Model 8557 (1) NOTE: ONLY use the bolts removed from the garage door opener. Place the garage door opener on the packing material to prevent scratching. 1.1 Remove the two bolts from the top of the garage door opener. 1.2 Align the rail and the styrofoam over the sprocket. Cut the tape from the rail, belt, and styrofoam. 1.3 Model 8550: Fasten the rail with the previously removed bolts. Model 8557: Fasten the rail with the previously removed washer bolt and lock nut. 1.4 Position the belt around the garage door opener sprocket. 1.5 Attach the sprocket cover over the garage door opener sprocket and attach with hex screws. Model 8550 Washered Bolt 5/16"-18x1/2" Hex Screw #8x3/8" Model 8557 Washered Bolt 5/16"-18x1/2" Lock Nut Hex Screw #8x3/8" Hex Screw #8x3/8" (Packed with the sprocket cover) 4

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4
To avoid possible SERIOUS INJURY to finger from
moving garage door opener:
•
ALWAYS keep hand clear of sprocket while
operating opener.
•
Securely attach sprocket cover BEFORE
operating.
To avoid SERIOUS damage to garage door
opener, use ONLY those bolts/fasteners
mounted in the top of the opener.
Washered Bolt
5/16"-18x1/2"
(Mounted in the
garage door opener)
Model 8550 (2)
Model 8557 (1)
HARDWARE
Hex Screw
#8x3/8"
(Packed with the
sprocket cover)
Lock Nut
(Mounted in the
garage door opener)
Model 8557 (1)
NOTE:
ONLY use the bolts removed from the
garage door opener. Place the garage door
opener on the packing material to prevent
scratching.
1.1
Remove the two bolts from the top of the
garage door opener.
1.2
Align the rail and the styrofoam over the
sprocket. Cut the tape from the rail, belt,
and styrofoam.
1.3
Model 8550:
Fasten the rail with the previously
removed bolts.
Model 8557:
Fasten the rail with the previously
removed washer bolt and lock nut.
1.4
Position the belt around the garage
door opener sprocket.
1.5
Attach the sprocket cover over the
garage door opener sprocketand
attach with hex screws.
Model 8550
Model 8557
Washered Bolt
5/16"-18x1/2"
Hex Screw
#8x3/8"
Washered Bolt
5/16"-18x1/2"
Hex Screw
#8x3/8"
Lock Nut
Assembly
1
Attach the rail to the garage door opener