Assembly Step 4
Install Chain/Cable and
Attach Sprocket Cover
9
Detach cable loop from carton and fasten to flat end
of trolley with a master link from coin envelope.
MASTER LINK PROCEDURE: Push pins of
master link bar through cable loop and hole in front
end of trolley. (See Figure A.) Push cap over pins
and into notches. Slide clip-on spring over cap and
into notches until both pins are securely locked.
Caution: Keep the chain and cable taut during
installation to help prevent kinking.
With trolley against screwdriver, dispense cable
around pulley. Proceed back around opener
sprocket as shown in Figure B (be sure sprocket
teeth engage chain) and forward to trolley threaded
shaft. (See Figure C.)
Use second master link to connect chain to flat end
of shaft. Check to make sure the chain is not
twisted.
REMOVE THE SCREWDRIVER.
ATTACH SPROCKET COVER TO OPENER: Insert
back tab in opener slot. Squeeze cover slightly and
insert the front tab in the slot on mounting plate.
• Spin the inner nut and lock washer down the
threaded shaft, away from the trolley.
• To tighten the chain, turn outer nut in the direction
shown. As you turn the nut, keep the chain from
twisting.
• When the chain is approximately 13mm above the
base of the T-rail at its midpoint, re-tighten the
inner nut to secure the adjustment.
Sprocket noise can result if chain is either too loose
or too tight.
When installation is complete, you may notice some
chain droop with the door closed. This is normal. If
the chain returns to the position shown when the
door is open, do not re-adjust the chain.
