1. Clamp the mounting plate into position
and use the 4 x M8 holes as a jig to drill
through the installed idler bracket
2. Tin snip x 2 cuts (around 50mm vertically
down) and bend the counterweight box
guard where the hand chain is going to rub
when installed.
3. Bolt the mounting plate to the Grifco
Operator, lightly tightening in the “closest”
chain adjustment position.
4. Using the existing drive chain (8B), fit
around the “driven sprocket” as a closed
loop with con link fitted.
Drive Chain length: 711mm (28”)
5. Lift the Grifco opener into position, looping
the chain over the sprocket, and fixing with
the 4 x M8 fasteners to the door hanger
bracket.
6. Set the 13 tooth drive sprocket into
position and firmly tighten the 2 x M8 grub
screws, one into the key way. Note: there
is NO key steel required.
7. Adjust chain tension via the 4 x M12
mounting bolts on the Grifco operator.
8. Fit hand chain and connect electrically.
9. Check mechanical installation via hand
chain before operating electrically.