KEENAN
MechFiber400 Operator’s Manual
Revision G02 28
th
Sept 2020
25
8.2 Chain tensioning
Primary Chain:
This preload tension can be set by adjusting the vertical threaded bolt in the
centre of the drive system
(adjuster “A” in Figure 8). The correct tension will be applied to the
chain when the tension spring is extended to
220 mm
between mounting centres. Once set,
retighten all locking nuts.
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 8c: KEENAN MechFiber400 primary drive chain tensioner setting
Secondary Chain:
The preload tension on this chain can be set by adjusting the horizontal
threaded bolt situated behind the secondary idler shaft driven sprocket
(adjuster “B” in Figure
8). As above the correct tension will be applied to the chain when the tension spring is extended
to
235 mm
between mounting centres. Once set, retighten all locking nuts.
Figure 8d: KEENAN MechFiber400 secondary drive chain tensioner setting
Auger Chain:
The preload tension on this chain can be set by adjusting the horizontal threaded
spring seat
situated to the front of the drive system (adjuster “C” in figure 8a and figure 8c).
The correct tension will be applied to the chain when the spring is compressed to
180 mm
.
Once set, retighten the locking nut against the seat.
CAUTION:
For the first month of ownership (i.e., during the chain bedding-in period), it is
recommended to check chain tension daily (see next section).
