Chamberlain C450 C450 Owner s Manual - English - Page 8

STEP 3 Install the idler pulley

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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). HARDWARE Nut 3/8" Lock Washer 3/8" Bolt Rail Tab Chain/cable Bolt Lock Washer Nut 8 Rail Grease Inside Pulley Idler Pulley

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8
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 (90ยบ).
Rail
Idler Pulley
Grease Inside
Pulley
Bolt
Chain/cable
Lock Washer
Nut
Bolt
Nut 3/8"
Lock Washer 3/8"
HARDWARE
Rail Tab