Fasten The Rail To The Motor Unit - Chamberlain FS2 Security+ Owner's Manual

ASSEMBLY STEP 3

Fasten the 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 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 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 1225EM Only: Attach chain spreader with #8x1" hex
screws and washers as shown.
HARDWARE SHOWN ACTUAL SIZE
Hex Bolt
5/16"-18 x 7/8" Nut 5/16"-18 Lock Washer 5/16"
To avoid serious damage to opener, ONLY use bolts/fasteners
mounted in top of motor unit.
MODEL 1225EM ONLY
Washers
Washered Bolt
5/16"-18x1/2"
Hex Bolt
5/16"-18x7/8"
Cover
Protection
Bolt Hole
T-rail
(Back
Section)
Lock Washer
5/16"
Nut
5/16"-18
12
#8x1"
Hex Screws
Chain
Spreader
USE ONLY THIS
TYPE AND SIZE
BOLT