Teagle Tomahawk 8500, Instruction Manual, Page: 13 / 44

BED CHAIN
To tension the Bed Chain, 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 drive sprockets. Retighten the lock
nuts.
After tensioning the Bed Chain the position of Rear
Sprocket Scrapers must be altered. To adjust slacken
the nut on the outside of the body. Slide the Scraper
towards the Chain Wheel so that it runs tightly against
the bottom of the groove in the centre of the Chain
Wheel, retighten the nut, see Figure 6. Repeat
procedure on the opposite side of the machine.
If the Bed Chain becomes tight in use, check that the
grooves in the Chain Wheels have not become tightly
packed with straw or silage. If they have they need
clearing and the Scrapers will require repositioning.
Figure 6. 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.
Check the Front Scrapers for excessive wear, these
may require replacing over time.
BALE RESTRAINT BEAM ADJUSTMENT AND
REMOVAL
To adjust the Bale Restraint Beam remove the two M12
bolts located in the holes on both sides of the Restraint
Beam, and loosen the third bolt in the slot. Reposition
the Bale Restraint Beam by aligning the necessary
holes, replace and tighten bolts.
To remove take the weight of the Bale Restraint Beam
using a suitable lifting device. Remove the 3 bolts from
each end before extracting the Bale Restraint Beam
itself.
Refitting is the reverse of above.
DUAL CHOP SIEVE REMOVAL
Raise the Blade Beam and lock it in the upper position
by entering the Bale Chamber and sliding two bars
through the ¾” diameter holes in the Slides.
Remove the Bale Restraint Beam as detailed
above.Remove the six M10 bolts that hold the sieve to
the Mid Body Panels. Remove the six cup squares
retaining the screen to the support beam. The Sieve
can then be removed by rolling it over the Crossbeater.
Refitting is the reverse of the above.
CROSSBEATER SHEAR BOLTS
To replace the shear bolt, open the left hand Hinged
Drive Chain Guard to gain access to the Shear
Sprocket. Grease the Sprocket Hub before replacing
the Shear Bolt with a Shear Bolt of the correct grade.
Shear Bolt Grades: Silage Machine - 10.9 M8 x 50
Dual Chop Machine - 8.8 M8 x 50
GEAR BOX
Check the oil level in the Gearbox daily.
After 50 hours of use the Gearbox oil should be drained
and replaced with new oil. To drain the oil, remove the
Valve Guard, remove the drain and filler plugs and allow
it to empty. Waste oil should be collected and disposed
of at an oil recycling facility.
Refill the Gearbox with SAE90.EP Gearbox oil. The oil
capacity of the Gearbox is 4.7ltrs (1.25 Gallons).
DRIVE CHAINS
Apply chain lubricant or oil weekly to these chains.
To tension the Bed Chain Drive, remove the Chain
Guard on the right hand side of the machine, release the
4 clamp bolts on the Motor Mounting Plate. Using the
tensioning bolt provided jack the motor mounting plate
until the chain has 12mm movement midway between
the Sprockets, see Figure 7.
To tension the Crossbeater Chain Drive open the
Hinged Drive Chain Guard and loosed the four bolts
retaining the Layshaft. Slacken the clamp bolt on the
Layshaft universal joint. Slacken the M16 locking nut
on the tension bolt and tighten the tension bolt until
there is 15mm deflection midway between the
Sprockets, see Figure 7. Tighten the tension Bolt
locking nut and the four Layshaft bearing retaining
nuts. Tighten the Layshaft universal joints clamping
nut and bolt before finally closing the Chain Guard.
Figure 7. Chain tension.
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