LiftMaster 87504-267 Instrucciones De Montaje página 13

Assembly
1 Attach the I- Beam Chain Rail to the Garage Door Opener
87802
To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of
the opener.
NOTE: ONLY use the bolts removed from the garage door opener. Place the garage door opener on the packing
material to prevent scratching.
1. Remove the two bolts from the top of the garage door opener.
2. Align the holes in the rail with the holes in the garage door opener.
3. Fasten the rail with the previously mentioned bolts. Cut away and discard the tape and Styrofoam from
around the rail.
4. Position the chain around the garage door opener sprocket.
5. Attach the chain spreader to the garage door opener with screws.
6. Guide the chain around the selected groove in the chain spreader.
Washered Bolt 5/16"-18x1/2"
(Mounted in the garage door opener)
Washered Bolt
5/16"-18x1/2"
HARDWARE
Hex Screw
#8x3/8"
(Packed with the sprocket cover)
Hex Screw
#8x3/8"
2 Attach the Chassis Support Bracket
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.
1. Position the chassis support bracket on the unit.
2. Attach the bracket to the rail with 1/4"-20 x 5/8" hex bolts and lock washers. Do not overtighten.
3. Attach the bracket to the opener by inserting a 5/16"-18 x 1/2" washered screw through a hole in each side
flange and a matching hole in the bracket. Complete the connection by inserting the #8-32 x 3/8" screw
through the back flange and the hole in rail support.
13
Hex Bolt
Lock
1/4"-20x5/8"
Washer
Screw
#8-32x3/8"
Washerd Bolt
5/16"-18x1/2"