Chamberlain C2405C Manuel D'installation page 9

Assembly
STEP 3 Install the Idler Pulley
1. Lay the chain/cable beside the rail, as shown. Grasp the end of the cable and pass
approximately 12" (30 cm) of cable through the window. Allow it to hang until Assembly
Step 4.
2. Remove the tape from the idler pulley. The inside center should be pre-greased. If dry,
regrease to ensure proper operation.
3. Place the idler pulley into the window as shown.
4. Insert the idler bolt from the top through the rail and pulley. Tighten with a 3/8" lock
washer and nut underneath the rail until the lock washer is compressed.
5. Rotate the pulley to be sure it spins freely.
6. Locate the rail tab. The rail tab is near the idler pulley on the front rail section. Use a flat
head screwdriver and lift the rail tab until the tab is vertical (90º).
Bolt
Chain/cable
Bolt
Lock Washer
Nut
9
HARDWARE
Nut 3/8" Lock Washer 3/8"
Rail Tab
Rail
Grease Inside Pulley
Idler Pulley