Chamberlain Whisper Drive Security+ HD800D, Owner'S Manual

Page: 14 / 44

Header Bracket
Idler P u lley
Header W all
OPTIO N W ITH
SOME EXISTI N G
I N STALLATIO N S
Header
Bracket
Mo u nting
Hole
Existing
Header Bracket
Spacer
Mo u nting
Hole
Existing
Cle
v is Pin
Cle v is Pin 5/16"x1-1/2" Ring Fastener
Garage
Door
Opener Carton or
Temporary
S
u pport
14
INSTALLATION STEP 3
Attach the Rail to the Header Bracket
NOTE: (Optional) With some existing installations, you
may re-use the old header bracket with the two plastic
spacers included in the hardware bag. Place the spacers
inside the bracket on each side of the rail, as illustrated.
• Position the opener on the garage floor below the
header bracket. Use packing material as a protective
base.
NOTE: If the door spring is in the way you’ll need
help. Have someone hold the opener securely on a
temporary support to allow the rail to clear the spring.
• Position the rail bracket against the header bracket.
• Align the bracket holes and join with a clevis pin
5/16"x1-1/2" as shown.
• Insert a ring fastener to secure.
HARDWARE SHOWN ACTUAL SIZE