Chamberlain 248730 User Manual download pdf (Page 9)

Assembly

STEP 4 Install the chain

1. Pull the cable around the idler pulley and toward the trolley.

2. Connectthe cable to the retaining sloton the trolley.(a)

a. Push pins of master link bar through cable link and trolley slot.

b. Push master link cap over pins and pastpin notches.

c. Slide clip-on spring over cap and onto pin notches until both pins are securely

locked in place.

3. With the trolley againstthe 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 sprocketteeth must engage the

chain. (b)

4. Check to make sure the chain is not twisted, then connect it to the threaded shaftwith the

remaining master link.

5. Thread the inner nut and lock washer onto the trolley threaded shaft.

6. Insert the trolley threaded shaftthrough the hole in the trolley.Be sure the chain is not

twisted. (c)

7. Loosely thread the outer nut onto the trolley threaded shaft.

8. Remove the screwdriver.

HARDWARE

Master

Link

Threaded Shaft

Threaded

Shaft

Outer

Nut

Front Rail

Section

(TO DOOR)

Inner

Nut

Lock

Washer

Master Link

Master

Link

Sprocket

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 43 44

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Chamberlain 248730 User Manual Page 9