Install The Belt And Attach The Belt Cap Retainer - Chamberlain Whisper Drive Security+ 47995D Owner's Manual

ASSEMBLY STEP 4
Install the Belt and Attach the Belt
Cap Retainer
1. Pull the belt around the idler pulley and toward
the trolley. The ribbed side must contact the
pulley.
2. Hook the trolley connector into the retaining slot
on the trolley as shown.
3. With the trolley against the screwdriver, dispense
the remainder of the belt along the rail length
toward the motor unit and around the sprocket.
The sprocket teeth must engage the belt.
4. Check to make sure the belt is not twisted and
FLAT side of the trolley threaded shaft is facing
the rail. Connect the trolley threaded shaft with
themaster link, as illustrated:
• Push pins of master link bar through holes in
end of belt and trolley threaded shaft.
• Push master link cap over pins and past pin
notches.
• Slide clip-on spring over cap and onto pin
notches until both pins are securely locked in
place.
5. Insert the trolley threaded shaft through the hole
in the trolley. Be sure the belt is not twisted, and
the FLAT side of the trolley threaded shaft faces
the rail.
6. Hold the belt at the trolley shaft as you thread the
spring nut by hand onto the shaft until finger tight
against the trolley. Do not use any tools.
7. Remove the screwdriver.
8. Position the belt cap retainer over the motor unit
sprocket as shown and fasten to the mounting
plate with 8x3/8" hex screws provided.
To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
• ALWAYS keep hand clear of sprocket while operating
• Securely attach sprocket cover BEFORE operating.
Master Link
Clip-On Spring
Master Link Cap
Trolley
Connector
Idler Pulley
Spring Nut
10
opener.
HARDWARE SHOWN ACTUA L SIZE
Hex Screw 8x3/8"
Spring/Trolley Nut
Pin
Notch
Trolley
Threaded
Shaft
Hole
Retaining
8x3/8" Hex Screws
Slot
Master
Link Bar
Belt Cap
Retainer
Motor Unit
Belt Pulley
Mounting
Plate