Install Belt & Attach Belt Cap Retainer - Craftsman 139.18687 Owner's Manual

Assembly Step 4
Install the Belt & 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 pliers, dispense the
remainder of the belt along the rail length toward
the powerhead and around the sprocket. The
sprocket teeth must engage the belt.
4. Check to make sure the belt is not twisted, then
connect it to the flat end of the trolley threaded
shaft with the master 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.
Hardware Shown Actual Size
Hex Screw 8x3/8"
Master Link
Clip-On Spring
Spring /Trolley Nut
Master Link Cap
Trolley
Connector
Idler Pulley
Spring Nut
Serious injury can result if fingers become
entangled in moving opener sprocket. Attach
belt cap retainer securely. Never operate opener
while your hand is near the opener sprocket.
5. Insert the trolley threaded shaft through the hole in
the trolley. Be sure the belt is not twisted, and the
ribbed side 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 locking pliers.
8. Position the belt cap retainer over the opener
sprocket as shown and fasten to the mounting
plate with 8x3/8" hex screws provided.
Pin
Notch
Trolley
Threaded
Shaft
Round
Hole
Retaining
Slot
Belt Cap
Retainer
10
WARNING
Master
Link Bar
Hex Screws
#8x3/8"
Opener
Sprocket
Mounting
Plate