Alltech KEENAN MechFiber345, Operator'S Manual

Page: 34 / 82

The upper spring seat is an internally threaded sleeve which sits on guide shaft.
It has a shoulder for the spring to seat against and a hexagon section at the top
for adjustment. A similar sized hexagon nut is used to lock the seat in position.
To adjust first remove the 2 wrenches from their storage location on the front
right face of the drive system reduction gearbox. (see Figure 31).
Swing the tensioner indicator downwards to allow full access to the spring
seat nuts. Using the wrenches open the locknut (upper nut) and screw clear
of the spring seat. The spring seat can now be adjusted up or down to set the
compressed length to 250mm (Its free length is 280mm). The upper edge of
the spring should now be positioned in the centre of the green section of the
indicator. This provides the correct tension of approx. 360kg to the chain. To
lock the setting, hold the spring seat in position with one of the wrenches and
tighten the locknut against it with the other.
It is recommended to check the tension weekly in the first few weeks of
operation as the chain, sprockets and tensioner “beds in” and may need to
be adjusted.
Figure 32: Secondary Chain Tensioner Spring setting
34
Revision A04 July 2018