Spearhead MD 120 User manual

Spearhead M
D
MD
GEAR ROTARY HEAD
Edition
Part No.
1
11
1
D
120/150
Rotary Head
MD
120/150
GEAR ROTARY HEAD
Edition
1.0 – August
2014
Part No.
8999086
Rotary Head
120/150
GEAR ROTARY HEAD
2014

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Spearhead MD 120/150 Rotary Head
IMPORTANT
VERIFICATION OF WARRANTY REGISTRATION
DEALER WARRANTY INFORMATION & REGISTRATION VERIFICATION
It is imperative that the selling dealer registers this machine with Spearhead Machinery Limited before delivery to
the end user – failure to do so may affect the validity of the machine warranty.
To register machines go to the Spearhead Machinery Limited web site at www.spearheadmachinery.com,
log onto ‘Dealer Inside’ and select the ‘Machine Registration button’which can be found in the Service
Section of the site. Confirm to the customer that the machine has been registered in the section below.
Should you experience any problems registering a machine in this manner please contact the Spearhead
Service Department on 01789 491867.
Registration Verification
Dealer Name: ……………………..…………………………………………………………….
Dealer Address:
…….………………………………………………………………………….
Customer Name:
……………………..…………………………………………………………
Date of Warranty Registration:
……/……/...…… Dealer Signature: ………………..……
NOTE TO CUSTOMER / OWNER
Please ensure that the above section has been completed and signed by the selling dealer to verify that
your machine has been registered with Spearhead Machinery Limited.
IMPORTANT: During the initial ‘bedding in’ period of a new machine it is the customer’s responsibility to
regularly inspect all nuts, bolts and hose connections for tightness and re-tighten if required. New
hydraulic connections occasionally weep small amounts of oil as the seals and joints settle in – where
this occurs it can be cured by re-tightening the connection – refer to torque settings chart below. The
tasks stated above should be performed on an hourly basis during the first day of work and at least daily
thereafter as part of the machines general maintenance procedure.
CAUTION: DO NOT OVER TORQUE HYDRAULIC FITTINGS AND HOSES
TORQUE SETTINGS FOR HYDRAULIC FITTINGS
HYDRAULIC HOSE ENDS PORT ADAPTORS WITH BONDED SEALS
BSP Setting Metric BSP Setting Metric
1/4” 18 Nm 19 mm 1/4” 34 Nm 19 mm
3/8” 31 Nm 22 mm 3/8” 47 Nm 22 mm
1/2” 49 Nm 27 mm 1/2” 102 Nm 27 mm
5/8” 60 Nm 30 mm 5/8” 122 Nm 30 mm
3/4” 80 Nm 32 mm 3/4” 149 Nm 32 mm
1” 125 Nm 41 mm 1” 203 Nm 41 mm
1.1/4” 190 Nm 50 mm 1.1/4” 305 Nm 50 mm
1.1/2” 250 Nm 55 mm 1.1/2” 305 Nm 55 mm
2” 420 Nm 70 mm 2” 400 Nm 70 mm

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Spearhead MD 120/150 Rotary Head
WARRANTY POLICY
WARRANTY REGISTRATION
All machines must be registered, by the selling dealer with Spearhead Machinery Ltd, before delivery to
the end user. On receipt of the goods it is the buyer’s responsibility to check that the Verification of
Warranty Registration in the Operator’s Manual has been completed by the selling dealer.
1. LIMITED WARRANTIES
1.01. All machines supplied by Spearhead Machinery Limited are warranted to be free from defects in material
and workmanship from the date of sale to the original purchaser for a period of 12 months, unless a
different period is specified.
1.02. All spare parts supplied by Spearhead Machinery Limited are warranted to be free from defects in material
and workmanship from the date of sale to the original purchaser for a period of 6 months.
1.03. The manufacturer will replace or repair for the purchaser any part or parts found, upon examination at its
factory, to be defective under normal use and service due to defects in material or workmanship. Returned
parts must be complete and unexamined.
1.04. This warranty does not apply to any part of the goods, which has been subjected to improper or abnormal
use, negligence, alteration, modification, fitment of non-genuine parts, accident damage, or damage
resulting from contact with overhead power lines, damage caused by foreign objects (e.g. stones, iron,
material other than vegetation), failure due to lack of maintenance, use of incorrect oil or lubricants,
contamination of the oil, or which has served its normal life. This warranty does not apply to any
expendable items such as blades, flails, bushes, belts, flap kits, skids, shields, guards, wear pads or
pneumatic tyres.
1.05. Temporary repairs and consequential loss - i.e. oil, downtime and associated parts are specifically
excluded from the warranty.
1.06. Warranty on hoses is limited to 12 months and does not include hoses which have suffered external
damage. Only complete hoses may be returned under warranty, any which have been cut or repaired will
be rejected.
1.07. Machines must be repaired immediately a problem arises. Continued use of the machine after a problem
has occurred can result in further component failures, for which Spearhead Machinery Ltd cannot be held
liable, and may have safety implications.
1.08. Except as provided herein, no employee, agent, dealer or other person is authorised to give any
warranties of any nature on behalf of Spearhead Machinery Ltd.
1.09. For machine warranty periods in excess of 12 months the following additional exclusions shall apply:
1.09.1. Hoses, external seals, exposed pipes and hydraulic tank breathers.
1.09.2. Filters
1.09.3. Rubber mountings
1.09.4. External electric wiring.
1.09.5. Labour and mileage costs.
1.10. All service work, particularly filter changes, must be carried out in accordance with the manufacturer’s
service schedule. Failure to comply will invalidate the warranty. In the event of a claim, proof of the service
work being carried out may be required.
NB Warranty cover will be invalid if any non-genuine parts have been fitted or used. Use of non-genuine
parts may seriously affect the machine’s performance and safety. Spearhead Machinery Ltd cannot be
held responsible for any failures or safety implications that arise due to the use of non-genuine parts.

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Spearhead MD 120/150 Rotary Head
2. REMEDIES AND PROCEDURES
2.01. The warranty is not effective unless the Selling Dealer registers the machine, via the Spearhead
Machinery web site and confirms the registration to the purchaser by completing the confirmation form in
the operator’s manual.
2.02. Any fault must be reported to an authorised Spearhead Machinery dealer as soon as it occurs. Continued
use of a machine, after a fault has occurred, can result in further component failure for which Spearhead
Machinery Ltd cannot be held liable.
2.03. Repairs should be undertaken within two days of the failure. Claims submitted for repairs undertaken more
than 2 weeks after a failure has occurred, or 2 days after the parts were supplied will be rejected, unless
the delay has been authorised by Spearhead Machinery Ltd.
2.04. All claims must be submitted, by an authorised Spearhead Machinery Service Dealer, within 30 days of
the date of repair.
2.05. Following examination of the claim and parts the manufacturer will pay, at their discretion, for any valid
claim the cost of any parts and an appropriate labour allowance if applicable.
2.06. The submission of a claim is not a guarantee of payment.
2.07. Any decision reached by Spearhead Machinery Ltd is final.
3. LIMITATION OF LIABILITY
3.01. The manufacturer disclaims any express (except as set forth herein) and implied warranties with respect to
the goods including, but not limited to, merchantability and fitness for a particular purpose.
3.02. The manufacturer makes no warranty as to the design, capability, capacity or suitability for use of the
goods.
3.03. Except as provided herein, the manufacturer shall have no liability or responsibility to the purchaser or any
other person or entity with respect to any liability, loss, or damage caused or alleged to be caused directly
or indirectly by the goods including, but not limited to, any indirect, special, consequential, or incidental
damages resulting from the use or operation of the goods or any breach of this warranty. Notwithstanding
the above limitations and warranties, the manufacturer’s liability hereunder for damages incurred by the
purchaser or others shall not exceed the price of the goods.
3.04. No action arising out of any claimed breach of this warranty or transactions under this warranty may be
brought more than one (1) year after the cause of the action has occurred.
4. MISCELLANEOUS
4.01. The manufacturer may waive compliance with any of the terms of this limited warranty, but no waiver of
any terms shall be deemed to be a waiver of any other term.
4.02. If any provision of this limited warranty shall violate any applicable law and is held to be unenforceable,
then the invalidity of such provision shall not invalidate any other provisions herein.
4.03. Applicable law may provide rights and benefits to the purchaser in addition to those provided herein.

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Spearhead MD 120/150 Rotary Head
C
CC
CE
EE
E De laration of Conformity,
De laration of Conformity,De laration of Conformity,
De laration of Conformity,
Conforming to E
Conforming to EConforming to E
Conforming to EU
UU
U Ma hinery
Ma hinery Ma hinery
Ma hinery Dire tive
Dire tive Dire tive
Dire tive
2006/42
2006/422006/42
2006/42/
//
/EC
ECEC
EC
We, Spearhead Ma hinery Ltd, Green View, Salford Priors, Evesham,
Wor estershire, WR11 8SW hereby de lare that:
Produ t
Produ t Produ t
Produ t
……………………………………………..…………………………
Produ t Code
Produ t CodeProdu t Code
Produ t Code ……………………………………………..…………………………
Serial No
Serial NoSerial No
Serial No ……………………………………………..……..………………….
Type
TypeType
Type ……………………………………………..…………………………
Manufa tured by: Alamo Manufa turing Servi es (UK) Limited, Station Road,
Salford Priors, Evesham, Wor estershire, WR11 8SW
Complies with the required provisions of the Ma hinery Dire tive 2006/42/EC.
The Ma hinery Dire tive is supported by the following harmonized standards:
•BS EN ISO 14121-1 (2007) Safety of Ma hinery – Risk Assessment, Part 1:
Prin iples Part 2: Pra ti al Guide and Examples of Methods.
•BS EN ISO 12100-1 (2010) Safety of Ma hinery – Part 1: Basi Terminology
and Methodology Part 2: Te hni al Prin iples.
•BS EN 349 (1993) + A1 (2008) Safety of Ma hinery – Minimum Distan es
to avoid the Entrapment of Human Body Parts.
•BS EN 953 (1998) Safety of Ma hinery – Guards General Requirements for
the Design and Constru tion of Fixed and Movable Guards.
•BS EN 982 (1996) + A1 (2008) Safety Requirements for Fluid Power
Systems and their Components. Hydrauli s.
The EC De laration only applies if the ma hine stated above is used in a ordan e
with the operating instru tions.
Signed
SignedSigned
Signed
(On be
On beOn be
On behalf of Spearhead Ma hinery Ltd
half of Spearhead Ma hinery Ltdhalf of Spearhead Ma hinery Ltd
half of Spearhead Ma hinery Ltd)
Status
StatusStatus
Status
General Manager
Date
DateDate
Date
………………………………………………

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Contents
ContentsContents
Contents
GENERAL INFORMATION 7
COMPONENTS LOCATION AND IDENTIFICATION 8
SAFETY SECTION 9
VEHICLE/TRACTOR PREPARATION 13
OPERATION 14
OPERATING WITH LIFT FLOAT KIT 18
TRANSPORTATION 19
MAINTENANCE 20
TORQUE SETTINGS AND FASTENERS 21
ORDERING YOUR PARTS 22
CASING MODULE 23
BRACKET MODULE 25
BEARING UNIT MODULE 26
SPLINDLE ASSEMBLY 27
BLADE ASSEMBLY MODULE 28
MOTOR MODULE 29
HYD MODULE 30
DECAL MODULE 31

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GENERAL INFORMATION
GENERAL INFORMATIONGENERAL INFORMATION
GENERAL INFORMATION
Read this manual before fitting or operating this equipment. Whenever any doubt
exists contact your dealer or the Spearhead Service Department for assistance.
Always use ‘Genuine Spearhead Parts’ on Spearhead machinery and accessories.
DEFINITIONS - The following definitions apply throughout this manual:
WARNING:
An operating procedure, technique etc., which can result in personal injury or loss of life if
not observed carefully.
CAUTION:
An operating procedure, technique etc., which can result in the damage of either machine or
equipment if not observed carefully.
NOTE:
An operating procedure, technique etc., which is considered essential to emphasise.
LEFT AND RIGHT HAND:
This term is applicable to the machine when fitted to the tractor and viewed from the rear.
This also applies to tractor references.
Note: The illustrations in this manual are for instructional purposes only and may on occasion not show
some components in their entirety. In some instances an illustration may appear slightly different to that
of your particular model but the general procedure will be the same. E&OA.
MACHINE & DEALER INFORMATION
Record the Serial Number of your machine on this page and always quote this number when
ordering parts. Whenever information concerning the machine is requested remember also to state
the make and model of tractor to which the machine is fitted.
Machine Serial Number:
Installation Date:
Machine Model details:
Dealer Name:
Dealer Address:
Dealer Tele
phone No:
Dealer Email Address:
NOISE STATEMENT
The equivalent daily personal noise exposure from this machine, measured at the operators’ ear, is
within the range 78 – 85 DB. These figures apply to a normal distribution of use where the noise
fluctuates between zero and maximum. The figures assume that the machine is fitted to a tractor with
a quiet cab with the windows closed in a generally open environment. We recommend that the
windows are kept closed. With the cab rear window open the equivalent daily personal noise
exposure will increase to a figure within the range 82 – 88 DB. At equivalent daily noise exposure
levels of between 85 and 90 DB, ear protection is recommended, it should be used if any window is
left open.

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A) Deck
B) Pivoting Mounting Bracket
C) Hydraulic Motor
D) Cutting Blade Unit
E) Side Skids
F) Front Flaps
G) Rear Flap
H) Guard Rail
I ) Access Point
J) Stop Assembly
COMPONENT LOCATION & IDENTIFI
COMPONENT LOCATION & IDENTIFICOMPONENT LOCATION & IDENTIFI
COMPONENT LOCATION & IDENTIFICATION
CATIONCATION
CATION

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SAFETY SECTION
SAFETY SECTIONSAFETY SECTION
SAFETY SECTION
This component / accessory is primarily designed for fitment to Power
Arms, therefore all safety aspects for this component relate to the safe
use of those machines and will be stated in the safety section of its
operation manual. A copy of the same safety information is provided
below in order to reiterate and refresh your memory.
This machine has the potential to be extremely dangerous, in the wrong hands it can
kill or maim. It is therefore imperative that the owner, and the operator of this
machine, read the following section to ensure that they are both fully aware of the
dangers that do, or may exist, and their responsibilities surrounding its use.
The operator of this machine is responsible not only for their own safety but equally
for the safety of others who may come into the close proximity of the machine, as the
owner you are responsible for both.
POTENTIAL SIGNIFICANT DANGERS ASSOCIATED WITH THE USE OF A
MACHINE:
▲ Being hit by debris thrown by rotating components.
▲ Being hit by machine parts ejected through damage during use.
▲ Being caught on a rotating power take-off (PTO) shaft.
▲ Being caught in other moving parts i.e.: belts, pulleys and cutting heads.
▲ Electrocution from Overhead Power Lines (by contact with or ‘flashover’ from).
▲ Being hit by cutting heads or machine arms as they move.
▲ Becoming trapped between tractor and machine when hitching or unhitching.
▲ Tractor overbalancing when machine arm is extended.
▲ Injection of high-pressure oil from hydraulic hoses or couplings.
▲ Machine overbalancing when freestanding (out of use).
▲ Road traffic accidents due to collision or debris on the road.
SAFETY
INFORMATION

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BEFORE USING A MACHINE YOU MUST:
▲ Ensure you read all sections of the operator handbook.
▲ Ensure the operator is, or has been, properly trained to use the machine.
▲ Ensure the operator has been issued with and reads the operator handbook.
▲ Ensure the operator understands and follows the instructions in operator handbook.
▲ Ensure the tractor front, rear and sides are fitted with metal mesh or polycarbonate
guards of suitable size and strength to protect the operator against thrown debris or
parts.
▲ Ensure tractor guards are fitted correctly, are undamaged and kept properly maintained.
▲ Ensure that all machine guards are in position, are undamaged, and are kept maintained
in accordance with the manufacturer’s recommendations.
▲ Ensure that blades and all fixings are genuine components supplied by the manufacturer
specifically for the machine and are securely attached with no parts missing or damaged.
▲ Ensure hydraulic pipes are carefully and correctly routed to avoid damage by chaffing,
stretching or pinching and that they are held in place with the correct fittings.
▲ Always follow the manufacturer’s instructions for attachment and removal of the machine
from the tractor.
▲ Check that the machine fittings and couplings are in good condition.
▲ Ensure the tractor meets the minimum weight recommendations of the machine’s
manufacturer and that ballast is used as necessary.
▲ Always inspect the work area thoroughly before starting to note obstacles and remove
wire, bottles, cans and other debris.
▲ Use clear suitably sized warning signs to alert others to the nature of the machine
working within that area. Signs should be placed at both ends of the work site. (It is
recommended that signs used are of a size and type specified by the Department of
Transport and positioned in accordance with their, and the Local Highways Authority,
guidelines).
▲ Ensure the operator is protected from noise. Ear defenders should be worn and tractor
cab doors and windows must be kept closed. Machine controls should be routed through
proprietary openings in the cab to enable all windows to be shut fully.
▲ Always work at a safe speed taking account of the conditions i.e.: terrain, highway
proximity and obstacles around and above the machine. Extra special attention should
be applied to Overhead Power Lines. Some of our machines are capable of reach in
excess of 8 metres (26 feet) this means they have the potential to well exceed, by
possibly 3 metres (9’ 9”), the lowest legal minimum height of 5.2 metres from the ground
for 11,000 and 33,000 volt power lines. It cannot be stressed enough the dangers that
surround this capability, it is therefore vital that the operator is fully aware of the
maximum height and reach of the machine, and that they are fully conversant with all
aspects regarding the safe minimum distances that apply when working with machines in
close proximity to Power Lines. (Further information on this subject can be obtained from
the Health & Safety Executive or your Local Power Company).

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▲ Always disengage the machine, kill the tractor engine, remove and pocket the key before
dismounting for any reason.
▲ Always clear up all debris left at the work area, it may cause hazard to others.
▲ Always ensure when you remove your machine from the tractor that it is left in a safe and
stable position using the stands and props provided and secured if necessary.
WHEN NOT TO USE THIS MACHINE:
▲ Never attempt to use this machine if you have not been trained to do so.
▲ Never use a machine until you have read and understood the operator handbook, are
familiar with it, and practiced the controls.
▲ Never use a machine that is poorly maintained.
▲ Never use a machine fitted to a tractor that does not have suitable front, rear and side(s)
cab guarding made of metal mesh or polycarbonate.
▲ Never use a machine if guards are missing or damaged.
▲ Never use a machine on which the hydraulic system shows signs of wear or damage.
▲ Never fit, or use, a machine on a tractor that does not meet the manufacturer’s minimum
specification level.
▲ Never turn a machine cutting head to an angle that causes debris to be ejected towards
the cab.
▲ Never start or continue to work a machine if people are nearby or approaching - Stop and
wait until they are at a safe distance before continuing. WARNING: Some Cutting Heads
may continue to ‘freewheel’ for up to 40 seconds after being stopped.
▲ Never attempt to use a machine on materials in excess of its capability.
▲ Never use a machine to perform a task it has not been designed to do.
▲ Never operate the tractor or machine controls from any position other than from the
driving seat, especially whilst hitching or unhitching the machine.
▲ Never carry out maintenance of a machine or a tractor whilst the engine is running – the
engine should be switched off, the key removed and pocketed.
▲ Never leave a machine unattended in a raised position – it should be lowered to the
ground in a safe position on a level firm site.
▲ Never leave a tractor with the key in or the engine running.
▲ Never carry out maintenance on any part or component of a machine that is raised
unless that part or component has been properly substantially braced or supported.
▲ Never attempt to detect a hydraulic leak with your hand – use a piece of cardboard.
▲ Never allow children near to, or play on, a tractor or machine under any circumstances.

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ADDITIONAL SAFETY ADVICE
Training
Operators need to be competent and fully capable of operating this machine in a
safe and efficient way prior to attempting to use it in any public place. We advise
therefore that the prospective operator make use of relevant training courses
available such as those run by the Agricultural Training Board, Agricultural Colleges
and Dealers.
Working in Public Places
When working in public places such as roadsides, consideration should be paid to
others in the vicinity. Stop the machine immediately when pedestrians, cyclists and
horse riders etc. pass. Restart only when they are at a distance that causes no risk
to their safety.
Warning Signs
It is advisable that any working area be covered by suitable warning signs and
statutory in public places. Signs should be highly visible and well placed in order to
give clear advanced warning of the hazard. Contact the Department of Transport or
your Local Highways Authority to obtain detailed information on this subject. The
latter should be contacted prior to working on the public highway advising them of
the time and location of the intended work asking what is required by way of signs
and procedure. – ‘Non-authorised placement of road signs may create an offence
under Highway Regulations’.
Use of Warning Signs
▲ On two-way roads one set of signs is needed facing traffic in each direction.
▲ Work should be within 1 mile of the signs.
▲ Work only when visibility is good and at times of low risk e.g.: NOT during ‘rush-
hour’.
▲ Vehicles should have an amber-flashing beacon.
▲ Ideally, vehicles should be conspicuously coloured.
▲ Debris should be removed from the road and path as soon as practicable, and at
regular intervals, wearing high visibility clothing and before removing the hazard
warning signs.
▲ Collect all road signs promptly when the job is completed.
Although the information given here covers a wide range of safety subjects, it is impossible to
predict every eventuality that can occur under differing circumstances whilst operating this
machine. No advice given here can replace ‘good common sense’ and ‘total awareness’ at all times,
but will go a long way towards the safe use of your Spearhead machine.

Spearhead M
D
VEHICLE / TRACTOR PREPARATION
VEHICLE / TRACTOR PREPARATIONVEHICLE / TRACTOR PREPARATION
VEHICLE / TRACTOR PREPARATION
We recommend vehicles are fitted with cabs using
‘safety glass’ windows and protective guarding when
used with our machines.
Fit Operator Guard using the
hooks provided. Shape the mesh to cover all vulnerable areas. The
driver must be looking through mesh and/or polycarbonate glazing when viewing the flail head in
any working position -
unless the vehicle/ cab manufacturer can demonstrate that the penetrati
resistance is equivalent to, or higher than, that provided by mesh/polycarbonate glazing. If the
tractor has a roll bar only, a frame must be made to carry both mesh and polycarbonate glazing.
The operator should also use personal protective equipment t
such as; eye protection
(mesh visor to EN1731 or
EN352, safety helmet to EN297, gloves, filter mask and high visibility clothing.
Vehicle Ballast
: It is imperative when att
possible stability of the machine and vehicle combination is achieved
by the utilisation of ‘ballast’ in order to counter
Front weights
may be required for rear mounted machines to place 15% of total outfit weight on the
front axle for stable transport on the road and to reduce ‘crabbing’ due to the drag of the cutting
unit when working on the ground.
Rear weights may be required
to maintain a reasonable amount of rear axle load on the opposite
wheel from the arms when in work; for normal off
20% of rear axle weight or more for adequate control, and for ground work i.e. verge mowing wit
experienced operators, this can be reduced to 10%.
All factors must be addressed in order to match the type and nature of the equipment added to the
circumstances under which it will be used
remember
ed that the machines centre of gravity during work will be constantly moving and will
differ from that during transport mode, therefore balance becomes critical.
Factors that affect stability:
■
Centre of gravity of the tractor/machine combination.
■ Geometri
c conditions, e.g. position of the cutting head and ballast.
■
Weight, track width and wheelbase of the tractor.
■
Acceleration, braking, turning and the relative position of the cutting head during these
operations.
■
Ground conditions, e.g. slope, grip, load
■
Rigidity of implement mounting.
Suggestions to increase stability:
■
Increasing rear wheel track; a vehicle with a wider wheel track is more stable.
■
Ballasting the wheel; it is preferable to use external weights but liquid ca
75% of the tyre volume –
water with anti
be used.
■ Addition of weights –
care should be taken in selecting the location of the weights to ensure
they are added to a position that of
■
Front axle locking (check with tractor manufacturer).
NOTE: The advice above is offered as a guide for stability only and is not a guide to vehicle
strength. It is recommended that you consult your vehicle manufacturer or loc
specific advice on this subject, additionally advice should be sought from a tyre specialist with
regard to tyre pressures and ratings suitable for the type and nature of the machine you intend to
fit.
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D
120/150
Rotary Head
VEHICLE / TRACTOR PREPARATION
VEHICLE / TRACTOR PREPARATIONVEHICLE / TRACTOR PREPARATION
VEHICLE / TRACTOR PREPARATION
We recommend vehicles are fitted with cabs using
‘safety glass’ windows and protective guarding when
hooks provided. Shape the mesh to cover all vulnerable areas. The
driver must be looking through mesh and/or polycarbonate glazing when viewing the flail head in
unless the vehicle/ cab manufacturer can demonstrate that the penetrati
resistance is equivalent to, or higher than, that provided by mesh/polycarbonate glazing. If the
tractor has a roll bar only, a frame must be made to carry both mesh and polycarbonate glazing.
The operator should also use personal protective equipment t
o reduce the risk of serious injury
(mesh visor to EN1731 or
safety glasses to EN166),
hearing protection to
EN352, safety helmet to EN297, gloves, filter mask and high visibility clothing.
: It is imperative when att
aching ‘third-
party’ equipment to a vehicle that the maximum
possible stability of the machine and vehicle combination is achieved
–
this can be accomplished
by the utilisation of ‘ballast’ in order to counter
-
balance the additional equipment added.
may be required for rear mounted machines to place 15% of total outfit weight on the
front axle for stable transport on the road and to reduce ‘crabbing’ due to the drag of the cutting
unit when working on the ground.
to maintain a reasonable amount of rear axle load on the opposite
wheel from the arms when in work; for normal off
-
ground work i.e. hedge cutting this should be
20% of rear axle weight or more for adequate control, and for ground work i.e. verge mowing wit
experienced operators, this can be reduced to 10%.
All factors must be addressed in order to match the type and nature of the equipment added to the
circumstances under which it will be used
–
in the instance of Power Arm Hedgecutters it must be
ed that the machines centre of gravity during work will be constantly moving and will
differ from that during transport mode, therefore balance becomes critical.
Centre of gravity of the tractor/machine combination.
c conditions, e.g. position of the cutting head and ballast.
Weight, track width and wheelbase of the tractor.
Acceleration, braking, turning and the relative position of the cutting head during these
Ground conditions, e.g. slope, grip, load
capability of the soil/surface.
Rigidity of implement mounting.
Increasing rear wheel track; a vehicle with a wider wheel track is more stable.
Ballasting the wheel; it is preferable to use external weights but liquid ca
n be added to around
water with anti
-
freeze or the heavier Calcium Chloride alternative can
care should be taken in selecting the location of the weights to ensure
they are added to a position that of
fers the greatest advantage.
Front axle locking (check with tractor manufacturer).
NOTE: The advice above is offered as a guide for stability only and is not a guide to vehicle
strength. It is recommended that you consult your vehicle manufacturer or loc
al dealer to obtain
specific advice on this subject, additionally advice should be sought from a tyre specialist with
regard to tyre pressures and ratings suitable for the type and nature of the machine you intend to
Rotary Head
hooks provided. Shape the mesh to cover all vulnerable areas. The
driver must be looking through mesh and/or polycarbonate glazing when viewing the flail head in
unless the vehicle/ cab manufacturer can demonstrate that the penetrati
on
resistance is equivalent to, or higher than, that provided by mesh/polycarbonate glazing. If the
tractor has a roll bar only, a frame must be made to carry both mesh and polycarbonate glazing.
o reduce the risk of serious injury
hearing protection to
party’ equipment to a vehicle that the maximum
this can be accomplished
balance the additional equipment added.
may be required for rear mounted machines to place 15% of total outfit weight on the
front axle for stable transport on the road and to reduce ‘crabbing’ due to the drag of the cutting
to maintain a reasonable amount of rear axle load on the opposite
ground work i.e. hedge cutting this should be
20% of rear axle weight or more for adequate control, and for ground work i.e. verge mowing wit
h
All factors must be addressed in order to match the type and nature of the equipment added to the
in the instance of Power Arm Hedgecutters it must be
ed that the machines centre of gravity during work will be constantly moving and will
Acceleration, braking, turning and the relative position of the cutting head during these
Increasing rear wheel track; a vehicle with a wider wheel track is more stable.
n be added to around
freeze or the heavier Calcium Chloride alternative can
care should be taken in selecting the location of the weights to ensure
NOTE: The advice above is offered as a guide for stability only and is not a guide to vehicle
al dealer to obtain
specific advice on this subject, additionally advice should be sought from a tyre specialist with
regard to tyre pressures and ratings suitable for the type and nature of the machine you intend to

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Spearhead MD 120/150 Rotary Head
OPERATION
OPERATIONOPERATION
OPERATION
The Rotary Head was designed for cutting scrub, brush and foliage of up to 4” (100mm) in
diameter or multiple branches that have a total cross section area of equivalent size.
Cutting Direction
It is recommended that the direction of cutting should always be such that the blades are
cutting away from the operator at the point where the material first enters the machine; i.e.
anti-clockwise for left hand mounted machines and clockwise for right hand mounted
machines (when viewed from above). Refer to the illustrations below for the correct hydraulic
motor connections to produce the required cutting direction.
WARNING! When rotating parts are in motion, serious injury may occur if
caution is not adopted or danger is not recognized. Never allow
bystanders within 300 feet of the machine when in operation Extreme
care should be taken when operating near loose objects such as gravel,
rocks and debris - these conditions should always be avoided.
The rotating parts in this machine have been designed and tested for rugged use. However,
they could fail upon impact with heavy solid objects - such as steel guard rails, concrete
abutments, etc., causing them to be thrown at a very high velocity. Never allow the cutter
head to contact such objects; inspecting the area to be cut for such objects and removing
them prior to mowing will help eliminate these potential hazards.

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Spearhead MD 120/150 Rotary Head
Once on location, lower the mower deck slightly above the material to be cut, so the mower does
not have to start under a load. With the tractor at an idle, engage mower. Bring tractor RPM up to
the correct working speed (*) and slowly lower deck to ground level. Maintaining even speed will
ensure a clean cut.
(*) NOTE: Working speed will be dependant on the particular machine and model that this
accessory is being operated on; refer to the operation manual for that machine for details.
When mowing on the ground, the unit should always be ‘carried’ rather than ‘dragged’ on the
side skids. Dragging the unit will increase the side loads on the boom, decrease the horsepower
available to the cutter head, and reduce the ability of the accumulator the carry part of the weight
of the boom during mowing operations. It is recommended that it is carried in such a way that a
proportion of its weight is supported by the boom of the operating machine, and a proportion
carried by the side skids. When worked in this manner the skids, in association with the pivoted
mounting, will allow it the freedom to follow the natural contours of the ground.
During mowing operation the correct operating speed should be maintained to prevent radical
changes in mower spindle speeds, reducing risk of cutter assembly damage.
For cutting brush it is usually best to stop the tractor and swivel the boom and mower into foliage.
The horizontal positioning action of the boom is designed to position the cutting head and provide
a limited pressure relief when excessive pressure is applied to the boom. Never force the cutting
head into heavy branches or stumps - damage to the unit may result.
CAUTION! When using the rotary cutting head for trimming trees and
shrubs, let the mower ‘saw' into them. Do not lower the mower head down
directly onto a tree or stump. The mower blades are designed to cut with
the end, any misuse can cause damage to the blade and risks placing the
operator in a hazardous situation.
CAUTION! Powering the boom down, forcing mower deck onto ground may
damage mower deck and it's attachment to the boom, creating a potentially
hazardous situation.
CAUTION! DO NOT use excessive force when positioning cutting head into
heavy branches or stumps. Damage to the unit may result. It is best to let
the cutter head ‘eat away’ slowly at heavy cutting jobs.
CAUTION! If foliage falls on top of mower deck causing tractor to become
unstable, move the boom ‘Forward’ and ‘Out’ to relieve tipping of the
tractor. Lower mower deck to ground and shut down unit. After all motion
stops, remove foliage from mower deck.
The mower will operate more efficiently in tougher conditions and with less power if the knives
are kept sharp. If the mower begins to vibrate, stop the tractor, check for wire wrapped in the
spindle or damaged knives. When replacing knives; replace all knives with new knives to ensure
proper balance so the mower will not vibrate. Severe vibration will result if knives with unequal
wear are used.
Begin a pass at the top side of the trees and work down with each consecutive pass. When
cutting trees and shrubs; use a lower speed to allow the knives time to cut as well as mulch the
foliage.

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Spearhead MD 120/150 Rotary Head
WARNING! If bystanders approach within 300 feet while mower is in operation
turn mower switch ‘OFF’ immediately. After shutdown, never leave the tractor or
allow bystanders to approach within 300 FEET of the unit until all motion stops
completely.
If cutter shaft jams and stops, turn mower switch to ‘OFF’, and swivel boom ‘AFT’. Normally this action
will clear the cutter head. If not, roll mower deck until adjacent to the secondary boom, and then lower
boom to rest mower deck on ground. Shut off the tractor, set parking break, allow all motion to cease.
At that point it is safe to leave the tractor and clear the cutter heads manually.
If wires, rope or chains should become entangled in the rotor stop immediately to prevent damage or
dangerous situations; stop the rotor and tractor and remove the starting key. Put working gloves on
and clear the rotor with the aid of pliers or shears. Do not attempt to disentangle by inverting the
rotational direction of the rotor.
Begin each pass at the top side of the trees and work down with each consecutive pass. Use a low
speed to allow the cutting blades time to mulch as well as cut the foliage. When the initial pass has
been made, disengage the mower, and return boom to a safe travel position. Return to starting point
and make next pass, etc.
Side Skids
The side skids have 2 mounting positions allowing the machine to cut at a height of either 2” (50mm)
or 3” (75mm). Altering the cutting height is by selection of either the upper or lower skid mounting
holes on the main frame; ensure that the same hole positions are selected on both sides of the
machine. Never attempt to use the machine without skids fitted or with the skids mounted at different
heights.
Pivoted Mounting
The mounting bracket is pivoted to permit the unit deviation from the horizontal by ±4°; this allows the
machine to follow the contours of the terrain on ground cutting work, thus providing a cleaner finish.
Blade Nut Access Point
A removable cover is located on the deck of the machine to allow access to the blade bolt nut. If
removed for service or maintenance work always ensure it is correctly replaced before using the
machine.

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Spearhead MD 120/150 Rotary Head
Deck Stop
A Stop assembly is provided for placement on the connecting boom of the operating machine; it is
multi-adjustable for use on 100mm square section or 100/110mm tapered section booms.
Its function is primarily to stop the deck coming into contact with the machines arm components when
the head is fully angled, but also acts as a support for the unit during transportation.
The stop should be assembled to the required configuration to fit the specific boom and positioned on
the boom at a height where the rubber buffers contact an outer point on the top of the deck when the
unit is fully angled in either direction.

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Spearhead MD 120/150 Rotary Head
OPERATING WITH LIFT FLOAT KIT
OPERATING WITH LIFT FLOAT KITOPERATING WITH LIFT FLOAT KIT
OPERATING WITH LIFT FLOAT KIT
For lift float operation pivot bolts must be removed from both sides of the pivot assembly.
To Test Operation
Set the height of the skids to the required approximate cut height above ground level.
From the operating position in the tractor cab, extend the machines arm fully and place the cutting
head on the ground.
Activate the float - this can be done either manually or with the switch kit option.
Operate lift up - it is normally for there to be an initial delay as the oil fills the float bottle first before
transferring to the ram.
Return lift control to the neutral when the cutting head lifts off the ground. Caution! the arm may
continue to lift for a few seconds.
It will be noticed that lift operation is now spongy.
Gently operate ‘lift down’ and stop when the skids touch the ground.
During Operation
The weight carried on the skids is now controlled by the amount of oil trapped in the lift circuit. The
lighter the load on the skids the less they will wear, therefore their working life will be extended.
Adding oil (lift up) will make the load on the skids lighter, removing oil (lift down) will make the load on
the skids heavier.
Adjust the amount of oil when the ground height of the work changes relative to the tractor and /or
when altering the working distance of the cutting head to the tractor. Continual adjustment will be
required on uneven or undulating terrain.
CAUTION! the cutting head will still be need to be lifted over objects and in places
where the ground is raised between the skids; there may be some delay on lift so
extra care and reduced forward speed should be adopted.
After Operation
Place the cutting head fully on the ground to release the trapped pressure from the float circuit, switch
off the floats to revert to normal arm operation for work and/or transport.
DANGER! Never loosen lift connections with pressure trapped in the lift circuit.
DANGER! Float should not be used in transport.
CAUTION! The work area should be inspected prior to work and all hazardous
objects removed or suitably marked so that they can be avoided during operations.

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Spearhead MD 120/150 Rotary Head
TRANSPORTATION
TRANSPORTATIONTRANSPORTATION
TRANSPORTATION
Transport Position
When transporting between job sites, or between cutting passes, the following procedure should be
followed; shut off the power to the cutting head and allow all motion to come to a complete
stop. Raise the boom to its highest position taking care to avoid all overhead obstructions such as
power cables, trees etc. Rotate the deck to a position where it contacts the stop buffer before then
folding the arms of the machine into a position where it is as compact as possible. Fit and secure any
transport locks and close the lift ram tap if applicable.
Check before transporting that the unit has ample clearance from the tractor tyres and other tractor or
machine components. The unit is now in position for transportation.
Transport Speed
Transport speeds should be kept to a minimum on uneven terrain, and in all conditions avoid driving
at a speed which causes exaggerated bouncing as this will put unnecessary strain on the tractors top
hitch position

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Spearhead MD 120/150 Rotary Head
MAINTENANCE
MAINTENANCEMAINTENANCE
MAINTENANCE
Maintenance duties on the machine have been kept to a minimum, the grease point indicated below
should be lubricated on a daily basis prior to work and the level of oil in the bearing housing checked.
Top up to plug level (as and when required) using EP90 gearbox oil. Oil capacity is 560ml (18.9 US
fl.oz.). Check for oil leakage around the spindle assembly on a daily basis.
After work and always prior to storage the machine should be cleaned to remove dirt and debris.
Grease the point indicated above prior to storage. Wherever possible the machine should be stored in
a clean dry location protected from the elements.
Blade Bar Torque Figures