Chamberlain SECURITY HD200DM - Manual (Page 10)

10
To avoid possible SERIOUS INJURY to fingers from moving
garage door opener:
• ALWAYS keep hand clear of sprocket while operating
opener.
• Securely attach chain spreader BEFORE operating.
Leave Chain and Cable
Inside Dispensing
Carton to Prevent Kinking.
Dispensing Carton
Keep Chain and Cable
Taut When Dispensing
"U" Bracket
Motor Unit
Sprocket
Chain
Spreader
Bolt
KG
KG
Figure 2
Trolley
Threaded
Shaft
Inner Nut
5/16"
Lock
Washer
5/16"
Figure 3
Figure 4
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.
Idler
Pulley
Round
Hole
Master Link
Clip-On Spring
Master
Link Cap
Trolley
Threaded
Shaft
Master
Link Bar
Cable
Link
Cable
Pin
Notch
Master Link
Clip-On Spring
Master
Link Cap
Slotted
Hole
Master
Link Bar
Round
Hole
Trolley
Threaded
Shaft
Figure 1