Teagle Tomahawk 7100 Instruction Book page 22

13.2 Blades
When carrying out maintenance work on the blades enter
the bale chamber via the tailgate. Wedge the rotor and
crossbeater(s) to prevent them from turning reducing the
risk of trapping hands between the knives and bale
restraint fingers.
Extreme care must be taken when carrying out
maintenance work on or around the blades as they
are incredibly sharp. When replacing blades use
13mm ring spanners with long handles to allow the bolts
to be removed whilst avoiding contact with the sharp
edges of the blades. Always wear leather gloves, and
work slowly and methodically.
13.2.1 Silage Crossbeater Blades
Cover areas of the crossbeater(s) not being worked on
with old carpet or hessian sacking.
Blades can simply be rotated and repositioned to achieve
a new sharp cutting edge. When both edges are blunt the
blades will require replacement.
To achieve greater cutting aggression, a selection of
blades can be positioned using the outer holes on the
crossbeater(s) rings.
13.2.2 Dual Chop Blades
Disengage the blades by raising the blade carrier. Enter
the bale chamber and lock the blade carrier in the raised
position by placing two bars through the 19mm (¾")
diameter holes in the slides.
Figure 8. Cover plate
closed position, bolt
removal.
Loosen the M12 bolt (1) from the cover plate located on
the left hand mid body panel, as indicated in Figure 8.
Rotate the cover plate and position as shown in Figure 9.
Remove the blade bar boss (2) by undoing the M12 bolt
(3), illustrated in Figure 9. Using the blockage removal
tool, which is stored on the front of the machine, slide out
the blade beam by hooking the boss hole.
To obtain fresh cutting edges on the blades, the blade
beam can be fully removed from the machine and
replaced in the opposite direction.
After the blade beam has been inserted back into the
machine, replace the blade bar boss but do not tighten
the M12 bolt, this allows the blade position to be adjusted.
Check the blade clearances on the crossbeater by
removing the locking pins and lowering the sliding blade
carrier. Align the blades centrally between the
crossbeater rings by adjusting the blade beam tension bar
on the sliding blade carrier. Finally tighten the M12 bolt
securing the blade bar boss and reposition the cover.
Once both edges of the blades have become blunt the
individual blades will require replacement. Do this using
a 13mm ring spanner and a 6mm Allen key, both with
Figure 9. Cover plate
open, bolt and boss
removal.
19
long handles, this will allow the bolts to be removed
whilst avoiding contact with the sharp edges of the
blades.
13.3 Removal Of Main Rotor
The rotor can only be released from the main gearbox
with the application of service tool SC3776 available from
Teagle Machinery Ltd.
13.4 Bed Chain
To tension the bed chain, on both sides of the machine
release the front lock nut on the bed chain tensioner and
jack the mounting bush using the other nut. The bed
chain should be tensioned such that the chain can be
lifted 50mm above the bed midway between the front and
rear sprockets. Retighten the lock nuts.
The position of rear sprocket scrapers will stay the
correct distance and position relative to the rear sprocket
and do not need to be adjusted separately see Figure
10.
If the bed chain becomes tight in use, check that the
grooves in the front and/or rear sprockets have not
become tightly packed with straw or silage. If they have,
they will need clearing and the scrapers may have
excessive wear and need replacing.
Rear sprocket
Figure 10. Sprocket scraper position.
If the area beneath the bed chain becomes blocked or
requires attention, remove the bolted inspection panel
underneath the machine and clear the blockage.
As the links of the bed chain wear into each other
repeated tensioning of the bed chain results in the rear
shaft moving closer to the rear of the chassis. As this
happens the gap for stones and other obstructions being
brought around by the slats reduces making the bed chain
more likely to jam.
When the bed chain is reaching maximum adjustment
then 2 links from either side of the chain will need
removing to extend the lifespan of the chain. The earliest
this can be done is when the distance of adjustment
shown in figure 11 has been reached.
To shorten, split the chain at any slat. Remove two links
from the same section of chain on the left and right hand
side, re-join and tension.
Scraper