Install The Belt And Attach The Belt Cap Retainer - Chamberlain Whisper Drive Security+ 248739 Owner's Manual

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ASSEMBLY STEP 4
insta// the Be/t and Attach the Be/t Cap
Retainer
1, Pull the bdt around the idler puiiey and toward the
trolley. Theribbed 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 belt pulley. The belt pufley
teeth must engage the belt,
4. Check to make sure the belt is not twisted. Connect
the trolley threaded shaft with the master link, as
itIustrated:
• 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 secureIy locked in place.
5. Insert the trolley threaded shaft through the hole in the
trolley. Be sure the belt is not twisted.
6. Hold the belt at the trolley shaft as you thread the
spring nut by hand onto the shaft untiI finger tight
against the trolley. Do not use any tools,
7. Remove the screwdriver.
8, Position the be_tcap retainer over the motor unit belt
puIley as shown and fasten to the mounting plate with
8x3/8" hex screws provided.
To avoid possibIe SERIOUSiNJURY to fingers from
moving garage door opener:
• ALWAYS keep hand clear of sprocket while
operating opener,
• Securety attach sprocket cover BEFOREoperating.
HARDWARE SHOWN ACTUAL S IZE
HexScrew8x3/8 ° Spring/Trolley Nut
Master Link
Clip-On Spring
Master Link Cap
idler PuIIey
Spdng Nut
Trolley
Connector
Notch
Trolley Master
Threaded Link Bar
Shaft
Retaining
Slot _ Hex Screws
Belt Cap _ #8x3t8"
Retainer _l_J_l Motor Unit
,_ Sprocket
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