Attach The Rail To The Header Bracket - Chamberlain Merlin Whisper Drive MT3850 Installation And Operating Instructions Manual

Header Wall
Header
Bracket
Belt Pulley
Bracket
Trolley
Garage
Door
HARDWARE
Ring Fastener X 2
Small Clevis Pin X 2
Long Clevis Pin x 1 (95mm)
INSTALLATION STEP 3

Attach the Rail to the Header Bracket

• Position the opener on the garage floor below the
header bracket. Use foam 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 either the single
long clevis pin or the two small clevis pins as shown
Figure 1.
NOTE: Small Clevis Pin should be used if the
carriage bolt is in the way.
• Insert the rings and fasteners to secure.
Figure 1
Ring
Fastener
Header
Bracket
Clevis Pin
Rail
10
Ring
Fastener
Clevis Pin
Foam
Packaging