12
Rotary Drive - Installation Guide
Attaching drive and steering sprockets
Note: Each sprocket must be keyed and then screwed to the shaft with
a grub screw secured with thread-locking compound.
Checking sprocket alignment and chain tension
Aligning drive and steering sprockets
Both sprockets must be accurately aligned to run in the same plane
when viewed from the side. Check for correct alignment by holding a
straight edge between the edge of the sprockets (see Figure 6).
Figure 6: Sprocket alignment
Adjusting the chain tension
Adjust the chain tension until it is just tight, so there is minimal lost
motion between the drive sprocket and the rudder stock.
Note: If the chain tension is not set correctly, the resulting lost motion
will impair steering performance.
To adjust chain tension:
•
Drives mounted horizontally: place as many of the supplied
shims as necessary under the mounting foot (see Figure 7).
•
Drives mounted vertically: use the slots in the mounting foot to
move the drive up or down (see Figure 7).
D5085-1
Side view
End view
Steering sprocket
Drive
sprocket
Steering sprocket
Drive
sprocket
