Install The Chain/Cable - Chamberlain Power Drive Security+ HD400D Owner's Manual

ASSEMBLY STEP 4

Install the Chain/Cable

1. Pull the cable around the idler pulley and toward
the trolley.
2. Connect the cable to the retaining slot on the
trolley, as shown (Figure 1):
• From below, push pins of master link bar up
through cable link and trolley slot.
• 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.
3. With the trolley against the screwdriver, dispense
the remainder of the cable/chain along the rail
toward the motor unit into the slot on the chain
spreader, around the sprocket onto the chain
spreader and continuing to the trolley assembly.
The sprocket teeth must engage the chain
(Figure 2).
4. Check to make sure the chain is not twisted, then
connect it to the threaded shaft with the remaining
master link.
5. Thread the inner nut and lock washer onto the
trolley threaded shaft (Figure 3).
6. Insert the trolley threaded shaft through the hole in
the trolley. Be sure the chain is not twisted
(Figure 4).
7. Loosely thread the outer nut onto the trolley
threaded shaft.
8. Remove the screwdriver.
Chain
Figure 2
Spreader
"U" Bracket
Bolt
Figure 4
Idler
Pulley
Motor Unit
Sprocket
Trolley
Threaded
Shaft
Round
Hole
10
WARNING
To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
CAUTION
• ALWAYS keep hand clear of sprocket while operating
opener.
• Securely attach chain spreader BEFORE operating.
Dispensing Carton
Leave Chain and Cable
Inside Dispensing
Carton to Prevent Kinking.
Keep Chain and Cable
Taut When Dispensing
Figure 1
Master Link
Clip-On Spring
Cable
Link
Cable
Figure 3
Lock
Washer
5/16"
Master Link
Clip-On Spring
Master
Link Cap
Trolley
Threaded
Shaft
Round
Hole
Slotted
Hole
Master
Link Bar
Trolley
Threaded
Shaft
Inner Nut
5/16"
Master
Link Cap
Pin
Notch
Master
Link Bar