Assembly - Chamberlain 1265LMC 1/2 HP Owner's Manual

ASSEMBLY STEP 1
Attach the T-Rail to the Motor Unit
ASSEMBLY STEP 2
Attach the Chain to the Sprocket
and Install the Sprocket Cover
Proceed to Assembly Step 3.
To avoid serious damage to opener, ONLY use screws
mounted in top of motor unit.
To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
• ALWAYS keep hand clear of sprocket while operating
opener.
• Securely attach sprocket cover before operating.