Issue 07/06
8080 From Serial Number 3801
9090 From Serial Number 1701
SAFETY FIRST!
1. READ THE INSTRUCTION BOOK THOROUGHLY
before attempting to operate or carry out any
maintenance on the machine. If you do not
understand any part of this manual, ask your dealer
for assistance.
2.
3.
4. NEVER OPERATE THE MACHINE WITH ANY
5 OPERATE SAFELY. Before starting work, check
ALWAYS CARRY OUT SAFE
MAINTENANCE. Never clean, adjust or maintain
the machine until the engine has been stopped, the
machine come to rest, the PTO disengaged and the
key removed.
NEVER WORK UNDER A MACHINE RAISED
ON THE 3-POINT LINKAGE unless it is securely
supported.
PARTS OR GUARDS MISSING. Check that all
guards including the PTO shaft guards are in good
condition and in place before operating the machine.
that there are no persons or animals in the
immediate vicinity of the machine or tractor. Always
maintain full control of the tractor and machine.
Ensure that you know how to stop the tractor and
machine quickly in case of emergency.
6. SECURE THE PTO GUARD BY MEANS OF CHECK CHAINS to suitable points on the tractor
and machine to prevent the outer plastic shield from
rotating.
7. NEVER STAND BETWEEN THE MACHINE AND THE TRACTOR WHEELS.
8. DO NOT WEAR LOOSE OR RAGGED CLOTHING
9. BEWARE OF DUST. Under dusty conditions, keep
the cab windows and doors closed. The use of a
dust mask conforming to EN149 is strongly
recommended.
10. BEWARE OF HIGH NOISE LEVELS. Some
tractor/implement combinations give noise
levels in excess of 90dB at the operator's ear.
Under such circumstances, ear defenders should be
worn. Keep cab windows and doors closed to
reduce noise level.
Throughout this handbook, the term `tractor' is used to
refer to the power source used to drive the machine. It
does not necessarily refer to a conventional agricultural
tractor.
HEALTH AND SAFETY AT WORK
Our equipment is designed so as to conform with
current Health & Safety Regulations and therefore
poses no significant hazard to health when properly
used. Nevertheless, in the interests of all concern ed, it
is essential that equipment of our manufacture is used
in accordance with the instructions that are supplied or
are available from our Technical Staff.
Legislation requires that all operators are instructed in
the safe operation, cleaning and maintenance of
equipment and machines. This handbook forms part of
that instruction and it must be read and understood
before fitting the machine onto the tractor or attempting
to use it.
WARRANTY
The standard warranty is for 12 calendar months against
faulty materials and workmanship. Components supplied as
part of the original machine, but manufactured by another
company, e.g. PTO shafts, wheels etc., are subject to the
original manufacturer's conditions and warra nty .
Where repairs are carried o ut un der w arra nty:a) Claims for the fitting of non original parts will not be
considered unless prior agree ment has been obtain ed.
b) The repairer must be advised that the work is to be the
subject of a warranty cl aim beforehand.
Your supplier is responsible for carrying out any
necessary pre-delivery inspection, fitting the machine
onto the tractor and test running. The supplier must
also give instruction in the safe use, maintenance and
adjustment of the machine.
In the interests of safety, please ensure that the
instructions referred to above are brought to the
attention of all your employees who are to use the
equipment. We recommend that the use of this
equipment is restricted to capable trained operatives.
Persons under the age of sixteen should not operate the
machine and should be kept away from where it is being
used.
c) Any claim must be submitted within four weeks of the
repair.
d) The damaged parts must be retained for inspection and
returned carriage pai d if required.
The right to withd raw warranty i s reserved if:a) Non-original parts are fitted.
b) The machine has been abused, badly maintained or
used for purposes other than that for which it was
designed.
INDEX
INSTURCTIONS
Page
Specifications 2
Explanation of pictograms 2
Safety 4
Left and right hand 4
Use of the Tomahawk 4
Use on the public highway 4
Preparation of the Tractor 4
Fitting the machine onto the tractor 5
Operation 5
Maintenance 7
Optional extras 9
Disposal 10
Please read instruction book
before using the machine.
Allow rotor to stop before removing
blockage with tool provided
Blockage removal tool
Tighten wheel nuts to setting in operators handbook
Beware crushing hazard, keep clear
Do not allow any one to ride on machine
Beware
540
DL1012
Frequency and direction
and of rotation of PTO
input Shaft
Maximum hydraulic circuit pressure
High rotor speed Standard chute ram selected
Low rotor speed Giraffe chute ram selected
3
SAFETY
In addition to the standard safety guidelines listed at the
beginning of this handbook, the following special safety
items apply to the Tomahawk.
1 The machine shall be operated by one person
2
only.
NEVER put your hands inside the delivery
chutes. In the event of a blockage clear it
using the tool provided (stored at the front of
the machine). First, stop the engine, remove the key,
disengage the PTO and wait for the rotor to come to
rest.
3
NEVER enter the bale chamber unless the
engine has been stopped the key removed, the
4
5
PTO disengaged and the rotor come to rest.
NEVER insert anything inside the chute or bale
chamber while the machine is running.
DANGER. When entering or leaving the bale
chamber take care, the tailgate surface may
be slippery.
6 Beware of overhead power lines when the
swivel chute deflectors are fully raised, contact
with power lines could result in the operator
receiving an electric shock.
7 Do not climb onto the top edges of the bale chamber
whilst the machine is use.
8 Do not allow anyone to ride on the machine or tractor
linkage or drawbar.
9 Do not allow persons or animals to stand in front of
the outlet chutes whilst the machine is running.
10 Do not operate the tailgate if any person or animal i s
standing in the loading area behind the machine and
always ensure good rearward visibility when lowering
the tailgate.
11 Never put your hand over a h ydraulic leak. Oil under
pressure may enter the blood stream.
12 The shredding of dusty or mouldy material can
create dust which may have adverse health effects.
Operator exposure to such conditions should be
avoided where possible. When circumstances
prevent this, either use a tractor with a suitable
forced air cab filtration system or an adequate
respirator. Respirators must comply with the relevant
Standard and be approved by the Safety
Inspectorate. Disposable filtering face piece
respirators to EN149 or half mask respirators to
EN140 fitted with filters to EN 143 are likely to be
adequate.
13 Before disconnecting the hydraulic hoses always
lower the tailgate onto the ground for safety and to
avoid residual pressure in the hoses.
14 Always fit the correct size tyre onto the rims when
fitting replacements.
15 Care must be taken when handling large bales, since
they have sufficient weight and density to cause
serious injury. Large bales should be handled with
appropriate machinery either directly into the
Tomahawk or into a position where they can be self
loaded. Do not manually load bales from the stack
above the machine so as to prevent risk of falling
into the machine or collapse of the stack of bales.
LEFT AND RIGHT HAND
In this Handbook and Parts List, the terms Right and
Left Hand apply to the machine when viewed looking
towards the rear of the tractor.
USE OF THE TOMAHAWK
The Tomahawk is designed for shredding either round
or rectangular bales of hay, straw or silage. It can also
be used to dispense clamp silage. Its use for shredding
other materials is not recommended without first seeking
further advice from the manufacturers.
The machine must never be run with the chute
components removed. Unapproved chute modifications
should not be carried out otherwise Safety Regulations
may be infringed.
USE ON THE PUBLIC HIGHWAY
If the machine is to be transported along the public
highway (an y road wh ere the public have acc ess)
behind the tractor, it may be necessary to f it lights
to comply with local road traffic legislation, as the
machine is likely to obscure the tractor rear light units.
Suitable lighting kits are available from your local
supplier or may be obtained by contacting Teagle
Machinery.
The Tomahawk is classed as a trailed implement and as
such does not require brakes when used in the United
Kingdom so long as a maximum speed limit of 20 mph is
observed.
Failure to comply with road traffic legislation may lead to
prosecution by local law enforcement agencies and
could also result in a road traffic accident.
PREPARATION OF THE TRACTOR
For good visibility down both sides of the m achine when
working and reversing the tractor should be fitted with
mirrors.
The PTO power required to drive the Tomahawk is
typically about 45KW (60 HP) for the 8080 range and 60
KW (80 HP) for the 9090 range. However, the suitability
of any particular tractor will depend upon, a) the
distance over which the straw is to be spread and b) the
type of bale to be spread. The machine is designed to
use the standard 540 rpm PTO shaft. In specific
circumstances 1000 rpm may be used, see the
‘Operation’ section for precise details
The valve block includes a flow control valve to var y the
rotational speed of the bed chain. A rotational speed of
the bed chain speed indicator of approximately 15 rpm is
required for the shredding of rectangular bales and
dispensing clamp silage. For round bales, front indicator
4
speeds of up to 30 rpm may be used to improve the
feed rate.
The hydraulic valve block requires a double acting spool
valve or a single acting valve with an unrestricted return.
Whichever is used, the hydraulic supply must be
independent of the 3-point linkage.
Where the machine is to be operated on a tractor with
closed centre hydraulics, a large volume of oil will be
passing through the valve and motor when the bed
chain is in use. This ma y require the tractor to be fitted
with a high flow “3
from being damaged.
rd
line return kit” to protect the pump
For details of the “3rd line return kit” and technical
guidance contact the relevant local tractor dealer.
The control lever mounting bracket should be fitted
inside the cab so that the levers are conveniently
situated for the operator. It should be remembered that
structural members of the cab must not be drilled or
welded.
FITTING THE MACHINE ONTO THE TRACTOR
Check that the lo wer link s are at a hei ght such that they
do not foul the PTO shaft when the tractor is turning. If
they are not used regularly, it is recommended that they
be removed.
Fit the slip clutch unit end of the PTO shaft to the
gearbox.
Fit the over-run clutch end of the PTO shaft to the
tractor. Gradually turn the tractor until maximum turning
lock is achieved checking that the PTO shaft does not
come to within 100 mm (4 inches) of bottoming. With the
shaft in its most extended position, there should not be
less than half of the original overlap between the sliding
members. If nec ess ary, cut the PT O shaft to the corr ec t
length.
Connect the hydraulic hoses into the spool valve
connections of the tractor. It is important tha t the s upply
hose to the valve is connected to the pressure port of
the tractor, this hose is marked with an identifying tag.
Place the cable control unit in the cab and attach it to
the socket provided.
It is essential to get the relationship between the tractor
PTO shaft and the gearbox input shaft correct to give a
satisfactory PTO shaft life. The correct geometry exists
when the machine is horizontal.
If the machine is shredding whilst turning on a regular
basis it is recommended that a PTO shaft with a wide
angle, constant velocity joint be fitted.
OPERATION
The machine is fitted with a 2-speed gearbox. For
blockage free operation it is important that the
correct gearbox speed is selected for the material
being shredded and the chute through which it is being
discharged.
The gearbox has a neutral position, so make sure the
required gear has been properly selected. If operated in
neutral, material will enter the rotor housing. Make sure
all material is removed before restarting the rotor.
For shredding straw and other dry materials either rotor
speed may be used, for maximum throw distance the
handle should be moved towards the position marked by
the hare to give a 1:1 ratio.
For shredding silage and other wet materials it is
recommended that the slow rotor speed be used as long
throw distances are not usually required and wastage is
reduced. To set the slow rotor speed the gearbox handle
should be moved to the position marked by the tortoise
to give a 1.85:1 ratio. The machine may be used at
reduced PTO speeds and still deliver material to the
desired position.
Where a 1000 rpm PTO shaft is to be used, set the
slow rotor speed with the gearbox handle in the
position marked by the tortoise to give a 1.85:1 ratio.
To achieve maximum throw distance, operate the
tractor engine at PTO speed. For reduced throw
distances operate the tractor at reduced engine
speeds. Very slow rotor speeds may cause blockages.
Material Distance
Spread
Gearbox
Speed
PTO Speed
Straw Maximum High 540
Straw Close High 300
Baled Silage Close Low 540
Clamp Silage Close Low 300
Table 1. Gearbox & PTO settings - right hand chute.
Specific operating instructions are given below for each
chute type.
RIGHT HAND CHUTE
Adjust the position of the chute to deliver the material
being spread in the desired location.
SLOPING SWIVEL CHUTE
The swivel chute rotates thro ugh 270 degrees and can
be operated in any position.
To deliver silage close to the machine position the
chute so that material is delivered onto the feed
passage slide, the position of the slide can be adjusted
to deliver the material accurately. Alternatively the
position of the material can be cont rolled by the chute,
it may be necessary to rotate the chute fully delivering
material alongside the drawbar.
In transport, rotate the chute to the right hand side of
the machine aligning the indicators on the chute and
top housing. Fully lower the deflector to keep the width
and height of the machine to a minim um.
TWIN CHUTE
The twin chute machine can discharge through either
the standard chute or the swivel giraffe chute,
depending on operating requirements.
To select the desired chute operate the h ydraulic ram to
move the chute selection segment to the correct position
for the chute to be used.
5
SINGLE BEATER OPERATING INSTRUCTIONS
The bale restraint above the crossbeater should not
need adjusting for different bale types. W hen loading,
the top cover can be folded towards the front of the
machine.
TWIN BEATER OPERATING INSTRUCTIONS
The bale restraint above the crossbeaters should only
have the 3 bale stop bars fitted when shredding 1.3m x
1.2m x 2.5m large r ectangular bales. When shredding
round bales, smaller rectangular bales and dispensing
clamp silage these bars are not required and may be
detrimental to the performance of the machine.
Long, dry silage may be difficult to handle causing the
shear bolt to fail. By increasing upper cross beater
speed and altering blade and ripper configuration, it may
be possible to shred this material. Using a chopper
baler will also solve this problem. Please contact the
manufacturer for further details.
COMMON OPERATING INSTRUCTIONS
In use, the bed chain rotates, feeding the bale into the
crossbeater(s). The output and power requirement can
be increased by increasing the forward speed of the bed
chain.
The strings or net should be removed from the bal e as it
is being loaded into the machine. The Tomahawk will
shred some string but some will tend to wrap around the
crossbeater(s). Putting twine or netwrap through the
machine is not recommended as it will be eventually
spread on the land and pollute the next cro p of sila ge or
hay.
Bales can be loaded into the machine in two ways, using
a loader or by self-loading using the machine tailgate. If
a loader is used, simply load the bale into the bale
chamber such that it is fully inserted, but without
ramming it against the crossbeater(s).
When loading the machine, avoid running the bed chain
without the rotors turning if there are large amounts of
material still in the bale chamber. Material will be placed
into the rotor housing causing the rotor to jam at start up.
Do not stand above the machine on a stack of
bales or in a barn to load the machine manually.
When removing string or netwrap from bales never
climb into the bale chamber or onto the tailgate
behind a bale unless the PTO has been
disengaged, the engine has been stopped, the key
removed and the machine come to rest.
The tailgate is designed to load bales into the chamber
of the machine. For large rectangular bales place the
bale on the ground with one end against a solid object.
For easy removal of the strings place the bale on its side
so that the strings are not in contact with the ground.
Reverse the machine with the tailgat e lowered until the
bale slides up the tailgate into the bale chamber. Raise
the tailgate until it is horizontal and engage the bed
chain to move the bale fully onto the tailgate.
Make sure the drawbar is securely attached to the
tractor as when loading bales or silage the weight
of the material on the tailgate may cause the
drawbar to lift.
Make sure that the bale is not forced against the
crossbeater(s) as this may cause problems when
starting the machine. Before removing the strings, place
the posts in the sockets on the tailgate and put the chain
around the rear of the bale.
To load round bales, reverse the machine under the
bale so that the bale rests against the tailgate. Lift the
tailgate slightly and drive forward a short distance away
from the solid object before raising the tailgate further
either roll the bale onto the tailgate or cut the strings or
netwrap on the machine side of the bale as low as
possible. Raise the bale into the chamber and then
remove the strings. A second bale can be loade d and
carried on the tailgate.
When loading clamp silage, lower the tailgate to give a
larger body capacity. The hydraulic oil pressure
required to rotate the bed chain would be determined by
the quantity of silage loaded. The machine requires
operating pressures of 120 bar (1750 psi.) when the
body is filled with clamp silage.
Adjust the deflector to give the desired spread width.
Engage the PTO with the tractor engine on low idle and
increase the speed rapidly when the clutch has engaged
fully. Once the rotor is rotating at the working speed,
operate the spool valve so that the bed chain starts
rotating and shredding is commenced.
With 2 round bales in the machine, the tailgate must be
lowered so that the second bale is not in contact with the
first allowing it to rotate freely (see figure 1).
Do not force bales against the crossbeater(s) using the
tailgate as it may cause damage to the machine.
Figure 1. shredding round bales
When shredding rectangular bales, keep the tailgate in a
position such that the rear of the bale is falling away
from the front and no pressure is applied to the front half
of the bale (see figure 2).
The bed chain should be operated at 15 rpm to force the
front half of the bale to rotate in the bale chamber in the
same way that a round bale would rotate (see figure 2).
6
Figure 2. shredding rectangular bales
Allow the front half of the bale to be almost fully
discharged befo re raising the tailgate to shred the rea r
half of the bale. Once the rear half of the bale is moving
on the bed chain, lower the tailgate slightly to allow room
for the bale to rotate within the bale chamber.
When it is necessary to stop shredding part way through
a bale, always stop the bed chain rotation and put it in
reverse for a few seconds before stopping the rotor and
crossbeater(s). This allows the material in the area
around the crossbeater(s) and rotor to be blown clear of
the machine. Failure to do this may result in a blockage
occurring when the machine is re-started.
The length of chop will vary with the condition of the
bale. Fresh clean straw will tend to result in a longer
chop length than that which is old, slightly damp,
weathered or caked together in the bales. The power
consumption will also vary with the material being
shredded. In general, baled silage and damp or caked
straw materials will require a relatively high power input.
Should the rotor or crossbeater(s) become blocked and
material become jammed it may be necessary to turn
the rotor backwards. This may be achieved by pushing
the rotor paddles with a post through the outlet chute.
Further access may be gained by removing the
blockage panels from the front of the upper and lower
rotor housing.
DANGER care must be taken when removing
blocked material, because crossbeater blades are
extremely sharp. Leather gloves will give some
protection against minor cuts.
IMPORTANT: The machine is fitted with a shear bolt on
the cross beater drive line. After a blockage, the bolt
may need replacing. If the bolt has failed grease must
be applied to the slipping surfaces via the grease nipple
before the shear bolt is replaced.
IMPORTANT: The machine is fitted with a slip clutch on
the rotor shaft. If this slips repeatedly, it should not be
tightened until the machine has been examined to check
that there is no fault or blockage. Refer to 'Maintenance'
for the correct clutch setting.
DANGER the slip clutch may be hot. Care should
be taken when removing it from either the machine
or tractor.
MAINTENANCE
BLADES
When carrying out maintenance work on the blades
enter the bale chamber by the tailgate. Wedge the rotor
and crossbeater(s) to prevent them from turning and
pinching hands and fingers between the bale restraint
fingers and the knives.
When replacing knives use spanners with long handles
which will allow the bolts to be removed whilst avoiding
contact with the sharp edges of the knives.
Always keep your hands away from the edges of
blades - particularly new ones, as they are extremely
sharp. The blades have a sharp trailing edge, which
remains sharp even when the leading edge is blunt.
Leather gloves will give some protection against minor
cuts.
BED CHAIN
To tension the bed chain, release the front lock nut 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.
The position of the rear sprocket scrapers must now be
altered. To adjust them, slacken the nut on the outside
of the body, slide it towards the sprocket and retighten
the nut.
Figure 3. Sprocket scraper position.
If the bed chain becomes tight in use, check that the
grooves in the sprockets have not packed tight with
straw or silage. Adjust the sprocket scrapers so that they
run tightly against the bottoms of the grooves in the
centre of the sprockets.
If the area beneath the bed chain becomes blocked or
requires attention, remove the 2 bolts retaining the panel
underneath the machine and remove the blockage.
CROSSBEATER REMOVAL
DANGER the knives fitted to the crossbeater(s)
are extremely sharp and should be handled with
care. Before attempting to remove the crossbeater
7
(s) either remove the blades or wrap the crossbeater(s)
in old carpet or hessian sacking.
It is not necessary to remove the crossbeater(s) to
replace the bearings.
Before the crossbeater(s) can be removed, remove the
large top cover and the left hand hinged drive chain
guard.
Release the chain tension on the side drive chains and
remove them. The sprocket and bearing can now be
removed from the input shaft of the beater to be
removed. Loosen the grub screws retaining the
bearings on the shafts before removal.
SINGLE BEATER
To replace the crossbeater, it will be necessary to
remove the bale restraint assembly. To do this, release
the bolts at each end of the bale restraint beam.
Suspend the assembly with a suitable lifting device and
remove.
Loosen the grub screws retaining the bearings on the
shafts at the other end of the beaters. Now remove the
right hand mid body panel. With the mid body panel
removed, the crossbeater can now be withdrawn from
the machine.
Refitting is a reverse of the above.
TWIN BEATER
To replace either crossbeater, it will be necessary to
remove the bale restraint. To do this, release the
retaining washers at the ends of the pivot shaft and
remove the bale restraint mount from the right hand end,
making sure the bale restraint is well supported. Slide
the bale restraint out of the mount at the left-hand end.
With the upper crossbeater supported by a suitable
lifting device and the lower crossbeater supported on
blocks. Loosen the grub screws retaining the bearings
on the shafts at the other end of the beaters. Now
remove the right hand mid body panel.
With the mid body panel removed, the upper cross
beater can now be withdrawn from the machine. The
lower crossbeater can now be removed.
Refitting is a reverse of the above.
ROTOR REMOVAL
First, remove the front drive guard, valve guard, housing
top and hose support. Release the hoses to the chuteoperating ram. Wedge the rotor t o prevent rota tion and
unscrew the bolt in the c entre of the rotor. Support the
bottom of the gearbox and secure it with a rope so that
when it is released it does not fall. Remove the 11 bolts
retaining the rotor gearbox.
Suspend the rotor from a lifting device s o that it can be
removed safel y. The rotor is l ocated on a taper and will
usually require a special tool to remove the rotor from
the gearbox. This tool is available from the
manufacturer.
Lift the rotor clear of the housing
Refitting is a reverse of the above.
CROSSBEATER SHEAR BOLTS
To replace the shear bolt, open the hinged left hand
drive guard to gain access to the shear sprocket.
Grease the sprocket hub before replacing the shear bolt.
One Grade 10.9 M8 x 50 bolt should be fitted.
GEAR BOX
After 50 hours of use the gear box 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 Gallon).
DRIVE CHAINS
Apply chain lubricant or oil weekly to these chains.
To tension the bed chain drive on the 8080 models,
remove the guard covering the chain, 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 4).
To tension the crossbeater chain drive, remove the
shear sprocket cover from the left hand chain guard.
Release the clamp bolt and reposition the relevant
tensioner so that there is the correct movement
midway between the sprockets on the opposite side to
the tensioner (see figure 4 and table 2).
The chute is rotated by means of a gear and ring gear.
It is important that this is well greased. To apply
grease to the ring gears there are 4 nipples on the
clamp plates.
The deflector ram has 2 grease nipples, one on each
pivot bush.
8
CABLES
To adjust the standard cable operating the spools, undo
the two socket head cap screws securing the clamp
plate to the valve. Undo the lock nut on the end of the
cable and rotate the adapter tube until the spool
operates correctly.
To adjust the flow control cable, remove the actuator
handle from the mounting bracket by partly removing the
3 long studs. Release the cable lock nut at the valve
adapter end and rotate the actuator and cable outer 1
complete turn. Operate the bed chain to check the
required adjustment has been achieved before
reassembling the actuator into the mounting bracket.
HYDRAULIC VALVE
Before attem pting to d ismant le any of the h ydraulic
system, the tailgate and deflectors must be fully
lowered to prevent injury from the unexpected
lowering of these components.
To split the valve slices, withdraw the three long studs
through the valve. The positions of the seals are shown
in the parts book diagram. When reassembling the
valve, the studs should be tightened to a torque of 13.5
Nm (10 lb.ft). If over tightened then the spools may jam.
If contaminated oil enters the bypass valve in the flow
control slice, it may jam open causing the hydraulic
circuit to fail. The bypass valve is found on the lower
sloping face of the flow control valve below the pressure
relief valve. To clear the blockage, undo the cap,
carefully making sure the return s pring is not lo st . U sing
a pair of long nosed pliers withdraw the spool from the
valve body. Clear any contamination and refit the spool,
which should move freely. Refit the return spring and
cap.
Contamination may also jam open the pressure relief
valve in the flow control slice. To clear, remove the relief
valve from the body and clear any contamination.
SLIP CLUTCH
If the clutch slips repeatedly for no apparent reason
there are a number of things to be checked:
Firstly check that th e clutch linings do not sho w signs of
damage or excessive wear. If so, they should be
replaced. When new they are 3mm. (1/8") thick.
Also make sure that the compressed spring length is set
to give the correct torque setting – see PTO shaft parts
list.
If the clutch continues to slip it should be adjusted as
follows .
1. Remove the guard fitted to the rotor gearbox.
2. Fit the PTO shaft with the slip clutch at the machine
end.
3. Insert a piece of wood through the discharge chute
and position it such that it prevents the rotor from
turning.
4 Insert a steel bar through the rear PTO yoke and us e
a spring balance to obtain the correct torque setting.
The clutch should just slip at a torque of 1200 Nm.
(900 lb.ft.) - equal to a force of 1000N. at 1.2 metre
(225 lb. at 4 feet) from the centre of the yoke. A dj ust
the clutch as necessary using the eight spring loaded
clamp bolts.
WHEEL REPLACEMENT
If it is necessary to remove a wheel, place a jack
underneath the axle beam, loosen the wheel nuts and
raise the machine until the wheel can be removed.
Place an axle stand underneath the machine before
removing the wheel. Refit the wheel and tighten the
wheel nuts.
WHEEL NUTS
Before using a new machine and daily during use, check
the wheel nuts are tight. The recommended torque is
shown in table 3.
9090 ( 6 Stud ) 400 ( 320 )
Table 3. Wheel nut torque settings.
Once the nuts are allowed to work loose, it may be
found impossible to keep them tight and new nuts and
studs will be required to overcome the problem. In
extreme cases, damage to the wheel rims and hubs
may res u l t .
TYRE PRESSURES
Check tyre pressures regularly inflating to the pressures
shown in the following table. Over inflation can be
dangerous.
Tyre Size 8080 Pressure
bar (psi)
10.0/80-12 2.4 ( 35 ) - - - - -
10.0/75-15.3 2.0 ( 29 ) - - - - -
11.5/80-15.3 1.2 ( 17 ) 5.0 ( 73 )
12.5/80-15.3 1.2 ( 17 ) 5.2 ( 75 )
Table 4. Tyre Pressures.
LUBRICATION
Good quality semi-solid grease should be applied to the
following grease points:
Every 4 weeks:
Oil PTO shaft spring plungers
Every 2 weeks:
Swivel chute ring gear (4 nipples)
PTO shaft joints - (2 nipples)
PTO guard bearings (where fitted)
PTO shaft sliding members
Oil Crossbeater & Bed chain roller chains
The above frequencies are based on typical daily use for
bedding & feeding purposes. Continuous use for special
applications may necessitate more frequents lubrication.
OPTIONAL EXTRAS
OVERSIZE WHEELS
Larger wheels may be fitted to the Tomahawk.
DRAWBAR JACK
Where the machine is fitted with a drawbar jack, adjust
the height of the drawbar to match the height of the hitch
point on the tractor. Reverse the tractor and attac h the
drawbar. Lower the machine until the weight is fully
transferred to the tractor. Remove the pin retaining the
jack to the drawbar and transfer it onto the transport
position across the front of the chassis.
Provided with the controls, is a supply cable for direct
connection to the tractor battery. When fitting to the
tractor, make sure that the positive cable is fitted to the
positive terminal of the battery. Failure to connect the
wires to the correct terminal will cause the in-line fuse
to blow. The fuse will continue to blow until the power
cables are connected correctly. Wh en fitting the cable,
make sure it is routed away from high temperature and
moving engine components. Avoid sharp edges that
would damage the cable, particularly when passing the
cable through a bulkhead. Position the two pin socket
in a suitable position within the cab.
CONTROL BOX
Supplied with the machine is a mounting plate, which
should be fitted in the cab in a suitable position
ensuring no damage to the cab structure.
The control box is fitted to a mounting bracket which
can be used on either side of the cab.
To reverse the bracket, remove the mounting bolts
beneath the control box lid and re-position the control
box. Make sure seal is in correct position when
reassembling.
A 7.5 amp blade type fuse is fitted in the supply lead of
the control box. If the connector provided on the
supply lead is not to be used , it is esse ntial that th e 7.5
amp fuse is retained to prevent damage by current
overload and incorrect connection to the tractor battery.
MACHINE CABLE
Once the control box has been positioned, route the
machine cable into the cab mak ing sure it is kep t away
from the rear wheel and any pinch points between the
PTO shaft and link arms. Where possible, route into
the cab through cable entry points on the tractor,
allowing the rear window to be kept closed during use.
Plug the cable connector into the socket on the box
and secure by rotating the locking collar.
BED CHAIN OPERATION (Push Button Controls)
The bed chain is operated by pressing forward button
to move forwards, pressing f orward button to stop, a nd
pressing and holding reverse button to reverse. It is
not necessary to stop the bed chain before pressing
the reverse button as this will automatically cancel the
forward direction before engag in g re verse.
STORAGE
When the machine is not being used it is
recommended that the control box be stored safely
away from the machine in a dry position. The plug on
the end of the machine cable shou ld be kept stored in
the bracket provided to keep it clean and stored safe
from damage.
MAINTENANCE
Before maintaining any part of the electronic controls
and wires, disconnect the 12v supply. Failure to do so
may result in damage to the electronic circuit
controlling the bed chain speed.
It is recommended that the controls are repaired by a
competent person. Copies of the circuit diagram are
available from the manufacturer on request.
DISPOSAL
At the end of the machine’s working life, the method of
disposal must be within the legislation laid down by the
local authority or the National Environment Agency.
The machine is composed of ferrous materials,
synthetic paints and rubber compounds.
10
TOMAHAWK FAULT FINDING CHART – PART 1
Symptom Fault Possible Solutions
High power
Consumption.
Rotor won't
start
Bed chain
does not turn
Bale fed too quickly into crossbeater(s). Reduce bed chain speed.
Bale jammed hard against crossbeater(s). Revers e be d ch ain .
Material in rotor housing jamming Rotor Revers e rotor to clear blockage.
Clutch setting too low Check setting and adjust
Hydraulic valve problem. See section below.
Material jammed between bed chain and
bodywork.
Relief valve setting too low. Adjust relief valve or replace if spring worn.
Tractor hydraulic oil pressure low. Check pressu re delivered by tractor.
Bed chain has come off the sprockets. Check sprocket condition, replace the bed chain and
Bed chain broken. Check sprocket groove is clean and that the
Motor not turning. Check connections and tractor hydraulics. If motor is
Bed drive chain has come off the
sprockets on 8080 models.
Clear material and check bed chain tension.
tension it.
chamber below the floor is free from obstructions.
Repair chain and refit.
seized reverse flow to release. Consult your dealer if
this fails.
Check sprocket condition, replace the chain and
tension it.
Slow
discharge
Bale stops
discharging
Sprockets seized. Replace bearings.
Bed Chain speed too slow. Increase forward speed of bed chain using flow
control valve.
Blades blunt or worn. Sharpen, reverse or replace blades.
Material jammed hard against bale
restraint above crossbeater(s).
Bed Chain speed too slow. Insufficient oil flow from tractor. Check oil level on
Rotor speed low. Check that slip clutch is not slipping - indicated by
Rotor speed low. Check tractor tachometer.
Crossbeater(s) not rotating. Replace shear bolt in drive sprocket.
Gearbox in neutral. Remove material from rotor housing before
Reverse bed chain direction f o r at lea st 5 seconds
until feed is restored.
tractor or adjust flow rate. Consult dealer if hydraulic
flow cannot be controlled using tractor valve. See
handbook for recommended speeds.
hot clutch assembly.
restarting and select correct gear.
11
TOMAHAWK FAULT FINDING CHART – PART 2
Symptom Fault Possible Solutions
Shear bolt fails
repeatedly.
Single beater
shear bolt fails
repeatedly
Twin beater
shear bolt fails
repeatedly
Chute and
rotor blocks
Rotor speed low. Check that slip clutch is not slipping - indicated by hot
Swivel giraffe
chute blocks
Rotor speed low. Check high rotor speed selected on gearbox.
Hydraulic
valve fails to
operate
Bolt bushes worn or damaged. Replace with new bushes.
Tailgate raised too high forcing bale into
crossbeater(s).
Front half of large rectangular bale not
rotating freely.
Gap between bale finger and crossbeater
ring too great.
Long dry silage wrapping around
crossbeater(s) and bale restraint.
Chute exit blocked. Make sure material can leave the chute freely.
Material not flowing smoothly. Raise deflector to improve flow and rotate chute to
Hydraulic connections to tractor faulty or
not connected.
Lower to tailgate allow material in bale chamber to
rotate freely.
Lower the tailgate to allow material in bale chamber
to rotate freely and increase the bed chain speed to
encourage rotation of the front half of bale.
Adjust bale finger to give 3mm clearance on blade
ring on beater.
Consult manufacturer.
clutch assembly. Also Increase engine speed.
achieve desired delivery position.
Rectify making sure pressure is applied to the valve
via the supply hose and that the return line flow is not
restricted.
Bed chain no
longer
operates or
only very
slowly. Failure
may be
sudden or
intermittent.
Loss of
operation of
rams and
swivel slices.
Also operation
of bed in only
1 direction
may occur.
Failure may be
sudden or
deteriorate
slowly over a
few days.
Oil leaking
from between
slices of the
valve.
Dirt or contamination in the Bypass Valve
or the Pressure Relief Valve in the flow
control slice.
Oil leaking from between slices of the
valve.
Internal failure in valve
Internal pressure in valve. Check return line hose connected and that return line
Clamping bolts loose. Check bolts through valve tightened to correct torque
Firstly, remove the Bypass Valve from the Flow
Control Slice inspect for contamination clean and
replace. If problem still exists, remove the Pressure
Relief Valve and inspect for contamination. If
problem persists or re occurs regularly replace tractor
hydraulic oil with new clean oil.
See section below.
Contact manufacturer for advice.
flow is not restricted by damaged fittings or the
tractor spool valve
specified in the maintenance section.
Interface seals damaged by either of the
above.
12
Replace damaged seals.
TAILGATE RAM Closed centres 571, Open centres 971, Stroke 400
Ref Description Part No. Qty Ref Description Part No. Qty
Ram assembly CYL1065 2
Seal kit (items 1,9,10,12 & 13) HYD4812 1
1 Wiper seal HYD4517 1
2 Wiper seal housing CYL1004 1
3 Rod seal back up ring DC1233 1
4 Cylinder assembly CYL1066 1
5 Piston rod CYL1067 1
6 Piston DC1381 1
7 Restrictor 1.3mm HYD1744 2
8 Locknut M20 FAS2336 1
9 Seal HYD4422 1
10 "O" ring HYD4007 1
11 Rod seal housing CYL1068 1
12 "O" ring HYD4022 1
13 "U" packing HYD4327 1
CHUTE RAMClosed centres 386, Open centres 642, Stroke 256.
Ref Description Part No. Qty Ref Description Part No. Qty
Ram assembly CYL1084 1
Ref Description Right Hand Swivel Twin Qty Associated Components Part No. Qty
A Valve supply hose HYD2228 HYD2228 HYD2228 2 Bonded seal ½ BSP HYD4204 2
Male coupling HYD1901 2
B Bed motor hose - 8080 HYD2189 HYD2189 HYD2189 2
Bed motor hose - 9090 HYD2117 HYD2117 HYD2117 2
C Chute ram hose - outer HYD2043 -- HYD2043 1
D Chute ram hose - inner HYD2046 -- HYD2046 1
E valve to 'T' piece - 8080 HYD2185 HYD2185 HYD2185 2
valve to 'T' piece - 9090 HYD2193 HYD2193 HYD2193 2
F Tailgate ram - front RH HYD2191 HYD2191 HYD2191 1
G Tailgate ram - front LH HYD2183 HYD2183 HYD2183 1
H Tailgate - rear RH HYD2189 HYD2189 HYD2189 1
J Tailgate - rear LH HYD2190 HYD2190 HYD2190 1
K Control valve less cables HYD5077 -- -- 1 ½ x ½ BSP M/M union HYD1013 2
Control valve c/w cables HYD5060 -- -- ½ x ¼ BSP M/M union HYD1114 2
Control valve - solenoid HYD5094 -- -- ½ x
3
/8 BSP M/M union HYD1115 4
Bonded seal ½ BSP HYD4204 8
Control valve less cables -- HYD5080 -- 1 ½ x ½ BSP M/M union HYD1013 2
Control valve c/w cables -- HYD5067 -- ½ x ¼ BSP M/M union HYD1114 2
Control valve - solenoid -- HYD5095 -- ½ x
3
/8 BSP M/M union HYD1115 6
Bonded seal ½ BSP HYD4204 10
Control valve less cables -- -- HYD5086 1 ½ x ½ BSP M/M union HYD1013 2
Control valve c/w cables -- -- HYD5084 ½ x ¼ BSP M/M union HYD1114 6
Control valve - solenoid -- -- HYD5096 ½ x
3
/8 BSP M/M union HYD1115 6
Bonded seal ½ BSP HYD4204 14
L Giraffe chute ram hose -- HYD2047 HYD2047 2
M Chute swivel motor hose -- HYD2132 HYD2132 2 One way restrictor HYD1755 2
Bonded seal ½ BSP HYD4204 2
N Divertor valve -- -- HYD5085 1 ½ x ¼ BSP M/M unions HYD1114 4
½ x
3
/8 BSP M/M unions HYD1115 2
Bonded seal ½ BSP HYD4204 6
P Seg. ram hose -- -- HYD2048 1
Q Seg. ram hose -- -- HYD2048 1
R Divertor valve hose -- -- HYD2189 2
NOT SHOWN