Chamberlain HD220 User Manual page 8

Assembly
STEP 3 Install the pulley
1. Lay the chain/cable beside the rail, as shown. Grasp the end with the cable loop 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. Secure idler pulley with clevis pin and ring fastener.
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).
Clevis Pin 5/16"x1-1/2"
HARDWARE
Ring Fastener
Ring Fastener
7
CORRECT
Rail Tab
INCORRECT
Chain/Cable
Rail Tab
Cevis Pin
5/16"x
1-1/2"
Grease Inside Pulley
Idler Pulley
Rail