Fasten The T-Rail To The Motor Unit - LiftMaster 1220EM FS2 Manual Del Usuario

ASSEMBLY STEP 3

Fasten the T-Rail to the Motor Unit

• Place the opener on packing material to protect
the cover. For convenience, put a support under
the chain pulley bracket.
• Remove the two 5/16"-18x1/2" washered bolts
mounted in the top of the motor unit.
• Align the holes in the back section of the T-rail with
the holes in the motor unit.
• Fasten the rail with the two washered bolts
previously removed. Tighten securely. Remember
to use only these bolts! Any other bolts will
cause serious damage to the opener.
• Insert a 5/16"-18x7/8" hex bolt into the cover
protection bolt hole in the T-rail as shown. Tighten
securely with a 5/16" lock washer and nut.
NOTE: This bolt prevents trolley over-travel. Keep a
25 mm minimum between the trolley and this bolt
when adjusting travel limits (see page 29).
Model 1220EM Only: Attach chain spreader with
#8x1" hex screws and washers as shown.
HARDWARE SHOWN ACTUAL SIZE
Hex Bolt
5/16"-18x7/8"
Nut Lockwasher
5/16"-18 5/16"
To avoid serious damage to opener, ONLY use bolts/
fasteners mounted in top of motor unit.
MODEL 1220EM
ONLY
Washers
Washered Bolt
5/16"-18x1/2"
Hex Bolt
5/16"-18x7/8"
Cover
Protection
Bolt Hole
Rail
(Back
Section)
Lock Washer
5/16"
Nut
5/16"-18
12
#8x1"
Hex Screws
Chain
Spreader
USE ONLY THIS
TYPE AND SIZE
BOLT