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12
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.
Washered Bolt
5/16"-18x1/2"
MODEL 1220EM
ONLY
Rail
(Back
Section)
Cover
Protection
Bolt Hole
Nut
5/16"-18
Hex Bolt
5/16"-18x7/8"
Lock Washer
5/16"
USE ONLY THIS
TYPE AND SIZE
BOLT
Chain
Spreader
#8x1"
Hex Screws
Washers
Hex Bolt
5/16"-18 x 7/8"
Nut 5/16"-18 Lock Washer 5/16"
HARDWARE SHOWN ACTUAL SIZE
To avoid serious damage to opener, ONLY use bolts/fasteners
mounted in top of motor unit.
MODEL 1225EM ONLY