Spearhead Twiga Carrier CF20 Assembly instructions

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Spearhead Machinery
Operator Instruction Manual For
2.00m fixed and 3.00m folding cut width

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IMPORTANT
Verification Of Warranty Registration
Dealer Warranty Information & Registration Verification
It is imperative that the selling dealer registers this machine with Spearhead 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:
http://dealerinside.spearheadmachinery.com/dealerinside/warranty/registermc.aspx
Should you experience any problems registering a machine in this manner please contact the Spearhead
Service Department on 01789 491860.
Confirm to the customer that the machine has been registered in the section below.
Registration Verification
Model Type:
Twiga Carrier
Model Number:
956_________
Serial Numbers:
Machine:
S__________
Cutting Implement:
S__________
Other:
Name Of Owner:
Name Of Installing Dealer:
Dealer Address:
Dealer Signature:
Date Of Delivery / Installation:
Date Of Warranty Registration:
IMPORTANT
At the point of transfer of ownership record the above information. Note the serial number of your machine and
always quote it in any communication with us or your dealer. (The serial number plate is located on the machine
mainframe.) This is particularly important when ordering spares. Remember to include all numbers and letters.
The information given throughout this manual is correct at the time of publication. However, in the course of
constant development of Spearhead machines, changes in specification are inevitable. Should you find the
information given in this book to be at variance with the machine in your possession, you are advised to contact
the Spearhead Service department where up-to-date information will be provided.
The manual can contain standard and optional features and is not to be used as a machine specification.
The machine has been tested and is considered safe if carefully used. Ensure your operator is properly trained
in its use and maintenance.

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EC DECLARATION OF CONFORMITY
Conforming to EU Directive 2006/42/EC & ISO 9001:2015
We,
Of SPEARHEAD MACHINERY LIMITED, Station Road, Salford Priors, Evesham, Worcestershire,
WR11 8SW, UK.
Declare that under our soleresponsibility the product (type);
Flail Mower
Product Code
Twiga Carrier CF20
CF20
Twiga Carrier CF30
CF30
Which are fixed and folding, vegetation control arm mower machines;
Serial No(s). & Date:……………………………………………………………………………….
Manufactured by: ALAMO MANUFACTURING SERVICES (UK) Limited, Station Road, Salford
Priors, Evesham, Worcestershire, WR11 8SW, UK.
In terms of its design, method of construction and execution thereof, the item of machinery described
above complies with the basic health and safety regulations of the respective EU Directives. The
Machinery Directive is supported by the following harmonized standards:
Directive 2006/42/EC
Directive 2014/30/EU
BS EN ISO 12100:2010
And other national standards associated with its design and construction as listed in the technical
file.
SPEARHEAD MACHINERY LIMITED operates an ISO 9001:2015 quality management system.
The system is accredited by;
BSI, Beech House, Linford Wood, Milton Keynes, UK, MK14 6ES
BSI identification number: UKAS 003
Spearhead Machinery certificate number: FM 649800
Signed …………………………………………
General Manager
On behalf of SPEARHEAD MACHINERY LIMITED
Status: General Manager Date: 24/04/2014

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Twiga Carrier
This manual covers the Twiga Carrier, which comes in two versions;
•Twiga Carrier CF20, which is a fixed arm with no breakout
•Twiga Carrier CF30, which is a folding arm with hydraulic breakout
Both versions allow the arm to be rotated from 0 to 136 degrees on a ram-equipped unit, or from vertical to
horizontal (with small adjustments either side) on a manual actuated unit.
The arm is attached via a DIN-type mounting plate, using bolt holes or user-supplied brackets, specific to their
prime mover. The prime mover itself can be a tele-handler or a tractor with a front loader attachment –both
types require hydraulic flow rate of 50 to 80 litres per minute for the saw motor, as well as an additional spool
valve if using the ram-equipped unit.
The arm is designed for vegetation control, to cut and thin all types of hedges, from thin to thick growth, with duty
cycles of 500 hours per annum. It is essential that all guards are fitted to the cutting attachment and the prime
mover’s cab when in use, and that the machine is operated in line with the procedures and practices detailed in
this manual.
IMPORTANT
This operator’s manual should be regarded as part of the machine. Suppliers of both new and second-hand
machines are advised to retain documentary evidence that this manual was provided with the machine.
This machine is designed solely for ground vegetation control and must not be used for any other purpose.
Use in any other way is considered as contrary to the intended use. Compliance with, and strict adherence
to, the conditions of operation, service, and repair, as specified by the manufacturer, also constitute
essential elements of the intended use.
This machine should be operated, serviced, and repaired only by persons who are familiar with its
characteristics and who are acquainted with the relevant safety procedures.
Accident prevention regulations, all other generally recognised regulations on safety and occupational
medicine, and all road traffic regulations must always be observed.
Any arbitrary modifications carried out to this machine may relieve the manufacturer of liability for any
resulting damage or injury.
It is potentially hazardous to fit or use any parts other than genuine Spearhead parts.
The company disclaims all liability for theconsequences of such use which, in addition, voids the machine
warranty.

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Contents List
1Machine Description...............................................................................................................................8
1.1 Intended Usage.........................................................................................................................8
1.2 General Arrangement ...............................................................................................................9
1.3 Machine General Specification.................................................................................................9
2Safety....................................................................................................................................................12
2.1 Safety Warnings......................................................................................................................12
2.2 Emergency Stop......................................................................................................................13
2.3 Dangers Due To Overhead Power Lines ...............................................................................13
2.3.1 Risk Assessment.......................................................................................................14
2.3.2 Emergency Action For Accidents Involving Electricity..............................................14
2.4 Noise .......................................................................................................................................15
2.5 Personal Protective Equipment ..............................................................................................15
2.6 Cab Guarding..........................................................................................................................16
2.7 Stability....................................................................................................................................16
2.8 Working On Inclined Ground...................................................................................................17
2.9 Working On Embankments.....................................................................................................17
2.10 Safety Decals..........................................................................................................................17
2.10.1 Proposition 65............................................................................................................19
3Machine Preparation.............................................................................................................................20
3.1 Prime Mover Requirements....................................................................................................20
3.2 Prime Mover Checks...............................................................................................................20
3.3 Lifting The Machine.................................................................................................................20
3.4 Controls Overview...................................................................................................................20
3.5 DIN Mounting To The Prime Mover........................................................................................20
3.6 Setting Arm Configurations.....................................................................................................22
3.6.1 Manual Shift Operation - Fixed Arm –Twiga Carrier CF20......................................22
3.6.2 Manual Transport / Working Position Operation –Folding Arm - Twiga Carrier
CF30..........................................................................................................................22
4Cutting Units..........................................................................................................................................24
4.1 Mounting The Cutting Unit ......................................................................................................24
4.2 Connecting The Cutting Unit Motor ........................................................................................24
4.2.1 Checking Cutting Disc Rotation Direction.................................................................24
5Installation Checks................................................................................................................................26
5.1 Breakout Checks –Twiga Carrier CF30 only.........................................................................26
5.1.1 Hydraulic Breakout....................................................................................................26
5.2 Hydraulic Hose Checks...........................................................................................................27
5.2.1 Twists.........................................................................................................................27
5.2.2 Sharp Bends..............................................................................................................27
5.2.3 Chafing Hoses...........................................................................................................28
6General Operation................................................................................................................................30
6.1 Operator Training....................................................................................................................30
6.2 Machine Inspection Records...................................................................................................30
6.2.1 In The Maintenance Tool Box...................................................................................30
6.2.2 Machine Inspection Record Sheet............................................................................30
6.3 Basic Machine Controls ..........................................................................................................34
6.3.1 Machine Pre-Start Check..........................................................................................34
6.3.2 Starting Up Procedure...............................................................................................34
6.3.3 Normal Start Up.........................................................................................................34
6.3.4 Transportation To Work Site .....................................................................................34
6.4 Cutting Guidelines...................................................................................................................35
6.4.1 The Work Area ..........................................................................................................35
6.4.2 General Cutting Hints................................................................................................35
6.4.3 Hedge Cutting Hints ..................................................................................................35
6.5 Hydraulic Breakout –Operation And Servicing - Twiga Carrier CF30 only...........................35
7Removal, Storage And Disposal ..........................................................................................................38
7.1 Preparation For Storage .........................................................................................................38
7.2 Parking And Removal.............................................................................................................38
7.2.1 De-mounting The Twiga Carrier................................................................................39

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7.3 Disposal...................................................................................................................................40
8Maintenance.........................................................................................................................................42
8.1 Hydraulic components ............................................................................................................42
8.1.1 Valves........................................................................................................................42
8.1.2 Rams..........................................................................................................................42
8.1.3 Hoses.........................................................................................................................42
8.2 Structural Components ...........................................................................................................43
8.2.1 Pins............................................................................................................................43
8.2.2 Greasing....................................................................................................................43
9Trouble Shooting...................................................................................................................................44
10 Spare Parts...........................................................................................................................................46
10.1 How To Obtain The Correct Spare Part Numbers .................................................................46
10.2 Spare Parts Ordering..............................................................................................................47
10.3 Dealer Network........................................................................................................................47
11 Warranty Policy Information .................................................................................................................48
11.1 Limited Warranties ..................................................................................................................48
11.2 Remedies And Procedures.....................................................................................................49
11.3 Limitation Of Liability...............................................................................................................49
11.4 Miscellaneous..........................................................................................................................50
11.5 Registration Of A Demo Machine...........................................................................................50
11.6 Claims Procedure....................................................................................................................50
11.7 Damage To New Machines ....................................................................................................51
11.8 Reimbursement.......................................................................................................................51
11.9 Failed Pumps, Motors, Gearboxes, Rams & ElectricalControls............................................51

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1 Machine Description
1.1 Intended Usage
Twiga Carrier arms intended to be used exclusively with Spearhead attachments, and no other unit should be
fitted. There are two versions of the Twiga Carrier:
1. a 2.0m basic fixed arm that can slide out sideways for reach and transportation;
2. a 3.0m folding version that includes a breakout ram to allow the head to be safely pushed back if an
obstacle is encountered. A pin may be removed from the arm on this version to allow it to be folded
forward and locked for transport.
Both versions allow head angling through the use of a cowl bracket arrangement, which can be actuated
hydraulically or manually with a two position pin. Both versions are also able to be reduced in width for transport
purposes.
Twiga Carrier attaches to tele-handlers and loaders arms via a DIN-type mounting plate. The mounting plate
allows the end user to either bolt-on or weld their own specific brackets to any quick attach system that may be
included with their own particular brand.
The arms’ overall reach will be dependent on the end user’s prime mover of choice, and that vehicle’s overall
capability.
Figure 1.1 Twiga Carrier

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1.2 General Arrangement
The layout and naming convention used throughout this manual are shown in Figure 1.2 below
Figure 1.2
(Twiga Carrier CF30 shown)
1.3 Machine General Specification
Twiga Carrier (CF20 fixed/CF30 folding) : Technical specification (1)
Machine weight
Base unit with no oil
280kg (folding) / 225kg (fixed)
Minimum Tractor
weight
(With ballast)
50hp (@1000kg)
Hydraulic protection
Main line relief pressure
n/a
Reach arm dimensions
(2) (3) (4)
Max lateral off-ground side cut
(folding)
3108mm (10’ 2”) [See Figure 1.3]
Max lateral off-ground side cut (fixed)
1989mm (6’ 6”) [See Figure 1.3]
Max vertical side cut (folding)
3854mm (12’ 7”) [See Figure 1.3]
Max vertical side cut (fixed)
2753mm (9’ 0”) [See Figure 1.3]
Max transport width to centreline
(folding)
1179mm (3’ 10”) [See Figure 1.3]
Max transport width to centreline
(fixed)
1153mm (3’ 9”) [See Figure 1.3]
Twiga Carrier (CF20 fixed/CF30 folding): Cutting unit data (1)
Cutting unit
SP15 Quadsaw
SP20 Quadsaw
SP25 Quadsaw
Drive
Loader hydraulics
Loader hydraulics
Loader hydraulics
Notes: (1) Spearhead Machinery constantly reviews and improves product designs and reserve the right to change this
information. As a consequence actualmachines may vary from specification. Contact your Spearhead
Machinery Sales representative if you have any queries.
(2) All dimensions are taken with a SP25 Quadsaw
(3) All lateral reach dimensions are taken from the centreline of a notional tractor with a 2030mm overall width.
Consequently down bank dimensions are measured assuming this notional tractor has the outside of its rear
wheel on the edge of an embankment.
(4) This specified geometric maximum is stated for information purposes only. It does not imply that it is safe or
appropriate to cut material in this position. The actual safe maximum side cut height will depend on the width
of the tractor that the arm mower is mounted to.
(5) The transport width quoted is a half width and is measured to the PTO centre which is notionally assumed to be
on the tractor centreline. As a consequence the full on road width is the quoted transport width plus half the
tractor width plus (or minus) any mountingoffset from the tractor centreline.
Removable
storablestands
Second
arm
First arm
SP Quadsaw (Soldseparately)
Turnbuckle (optional
ram) for head angling
Cowl linkage
Slew
pivot
Loader mounting
plate
Optional hydraulic
breakout reservoir

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(6) Alldimensions aredetermined from computer models. As a result actual measurements may vary as a result
of deflections due to weight. Tractor tyres will naturally compress on the working side of the tractor as the arm
is deployed and the centre of gravity shifts. The amount is affected by tyre construction, age, inflation
pressures and the use of local ballast weight. For example a 20mm compression of the cutting side rear tyre
will be magnified by the arm reach which willhave an effect on the actual cut height.
Figure 1.3 Reach dimensions –Twiga Carrier CF30 folding (top), CF20 fixed (bottom)

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Figure 1.4 Transport Position –Twiga Carrier CF20 Fixed (Left), CF30 Folding (Right)
Figure 1.5 Shipping Position
Lifting point

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2 Safety
2.1 Safety Warnings
The operator must read, understand and follow all of the Safety instructions. Serious injury or death may occur
unless care is taken to follow the warnings and instructions provided. The level of safety is indicated in three
levels and the following notation is used throughout this operator instruction book;
DANGER! Level 1; alerts for imminent death or critical injury.
WARNING! Level 2; warns of serious injury or possible death.
CAUTION! Level 3; indicates possible injury.
Never operate the prime mover or machinery until you have read and completely understand this manual and
the prime mover operators manual and each of the safety messages found in the manuals and those displayed
on the prime mover and implement.
DANGER! DO NOT attempt any maintenance of or adjustment to themachine while it is running.
Before carrying out any work on the machine follow the three safety instructions below:
1. Lower the cutting head on to the ground
2. Put thePTO out of gear
3. Stop the prime mover engine, remove and pocket the starting key.
DANGER! Keep a careful watch for passers-by who may inadvertently get in the way of cut material
being thrown from the cutting unit. This equipment is capable under adverse conditions of
throwing objects great distances at high velocity. Stop the equipment until all people are well
clear.
DANGER! AVOID WIRE. It can be extremely dangerous if wire gets caught up in the cutting unit, and
every care must be taken to ensure this will not happen. Inspect the working area before
commencing. Remove all loose wire and obstructions and clearly mark those that are fixed so
that you can avoid them. Any unusual noise from the cutting unit area indicates that the cutting
elements may have been fouled by an obstruction. A visual indication that wire is in contact with
the cutting elements may be a sudden movement of the vegetation ahead of the cutting unit. In
any such event STOP the prime mover engine INSTANTLY. On no account move the cutting
unit until the rotor has completely stopped. NEVER UNDER ANY CIRCUMSTANCES reverse
the cutting operation to 'clear itself'. When the cutting elements have stopped, inspect it and
remove any obstruction that may be present. If working under a raised machine ensure that it is
safely supported. Before working on the cutting unit stop the prime mover engine and remove
the ignition key.
DANGER! This equipment is capable under adverse conditions of throwing objects great distances at
high velocity. CHECK the cutting elements for wear and the attachment bolts for tightness every
day during work. A fewmoments; whenever the machine is stopped (e.g. whenever removing
obstructions); will help reduce wear or loss.
DANGER! Keep your forward speed to a level appropriate to the operating conditions. High-speed
manoeuvres with the arms stretched out are very dangerous, particularly on uneven ground
where there is risk of overturning.
DANGER! To avoidfatalities dueto electrocution the operator must pay particular attention when
working near overhead power lines. Some machines have vertical reaches in excess of 8m
which exceeds the 5.2m minimum legal height for 33,000 volt power lines. Be aware of the
maximum reach of your machine. Be aware that you do not have to touch a power line to

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receive a discharge. Flashovers can occur due to proximity. See Section 1.2 ‘Dangers due to
overhead power lines’.
DANGER! A wire mesh cab guard must be fitted on the outside of the cab window, between the operator
and the cutting head, in such a position as to give the operator maximum protection.
DANGER! Where a hedge trimmer is used in conjunction with prime movers not fitted with a glazed
safety cab, a clear polycarbonate safety screen together with a mesh guard must be fitted to the
prime mover between the operator and the cutting head. A polycarbonate safety screen must
be used on cabs where windows are likely to be left open for ventilation purposes. It is essential
that cab windows on the operating side; through which the cutting head is observed; are intact,
clean and closed, or a clear polycarbonate safety screen must be fitted where hedge cutting
and grass trimming operations are carried out. When hedge cutting, a mesh guard must also
be fitted.
WARNING! Do not operate machinery with guards missing. Ensure that the correct guards are properly
fitted to the machine and prime mover at all times and that they are in good condition. Refer to
Section 2.6 to ensure you have the correct guards fitted for the type of operation being
performed.
WARNING! While the prime mover is running all personnel should keep well clear of the area around the
machine as there are numerous crushing, shearing, impact dangers caused by the machine
operation.
WARNING! Direct the cut material away from the prime mover. It is important that while operating the
cut material is not directed towards the operator
WARNING! Extreme care should be taken when operating near loose objects such as gravel, rocks,
wire, and other debris. Inspect the area before mowing. Foreign objects should be removed
from the site to prevent machine damage and/or bodily injury or even death. Any objects that
cannot be removed must be clearly marked and carefully avoided by the operator. Stop cutting
immediately if the cutting elements strike a foreign object. Repair all damage
WARNING! Transport the machine only at safe speeds. Serious accidents and injuries can result from
operating or transporting this equipment at unsafe speeds.
WARNING! Failure to have sufficient stability ballast mounted or to drive at inappropriate speeds on
undulating terrain may result in a loss of directional control.
2.2 Emergency Stop
In an emergency bringing the cutting head to a stop requires familiarity with the controls fitted to the machine.
Refer to chapter on ‘Operator controls overview’ for information regarding controls fitted to Spearhead machines,
and then refer to the relevant control overview for whichever is fitted to your specific machine. Make sure the
operator reads and understands the relevant controls chapter paying particular attention to the instructions for
how to stop the machine quickly in an emergency.
2.3 Dangers Due To Overhead Power Lines
There are significant dangers involved when working in the vicinity of Overhead Power Lines (OHPL’s). Be
aware that some Spearhead machines are capable of reaches in excess of 8 metres (26’) and 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, see Figure 2.1 - Minimum Heights For Overhead Power Lines
DANGER! All operators must read the following information and be aware of the risks and dangers
involved when working in the vicinity of Overhead Power Lines (OHPL’s).

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WARNING! Fatal electrocution can occur without contacting a power line. Due to the high electrical
potential between the conductors and the ground a flash over can occur from the power line to
any conducting medium within range. Steel cutting machines are ideal conductors.
Wherever possible the safest option is always to avoid working in areas close to OHPL’s. Where unavoidable,
alloperators must perform arisk assessment and implement asafe procedure and system of work, see Section
2.3.1 below.
All operators should perform a risk assessment before operating any arm mower within 10m horizontal
distance of any OHPL’s. If you are unsure do not work in the area. Never put yourself or others at risk.
2.3.1 Risk Assessment
Before starting to work near OHPL’s you should always assess the risks. The following points should be
observed;
•Know the risks of contacting OHPLs and the risk of flashover.
•Always find out the maximum reach height for your machine mounted on its prime mover, see
‘Machine general specification in chapter 1 for guidance.
•Always find out the location and route of all Power Lines within the work area.
•Always find out the operating voltage of all Power Lines within the work area.
•Always contact the local Distribution Network Operator (DNO) who will be able to advise you
on the operating voltage, exclusion zones, the minimum safe working distance and any
additional precautions required.
•Never attempt to operate the machine within an exclusion zone.
•Always work with extreme caution and plan your work ahead to avoid high risk areas.
•If doubt exists do not work in the area –never risk the safety of yourself or others
Further information and leaflets on this and other agricultural safety subjects are available on the ‘Health &
Safety Executive’ website at the following address: www.hse.gov.uk/pubns/agindex.htm
2.3.2 Emergency Action For Accidents Involving Electricity
•Never touch an overhead line - even if it has been brought down by machinery, or has fallen.
Never assume lines are dead.
•When a machine is in contact with an overhead line, electrocution is possible if anyone touches
both the machine and the ground. Stay in the machine and lower any raised parts in contact or
drive the machine out of the lines if you can.
•If you need to get out to summon help or because of fire, jump out as far as you can without
touching any wires or the machine keep upright and away.
•Get the electricity company to disconnect the supply. Evenif the line appears dead, do not
touch it - automatic switching may reconnect
Figure 2.1 - Minimum Heights For Overhead Power Lines

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Figure 2.2 - Absolute Minimum Exclusion Zones For Specific Overhead Power Lines
Figure 2.3 - Definitions Of Exclusion Zones
2.4 Noise
The equivalent daily personal noise exposure from this machine, measured at the operator's ear, is within the
range of 80-85dB when used in conditions where the load fluctuates between zero and maximum. This applies
when the machine is attached to a prime mover fitted with a quiet cab and used in accordance with the operating
instructions in a generally open environment. At equivalent daily noise exposure levels of between 85 and 90dB,
suitable ear protectors are recommended.
2.5 Personal Protective Equipment
When working in an unsealed cab or where windows and apertures are open to the environment, operators are
advised to wear suitable ear protectors, see Section 2.4.
When handling cutting surfaces or hydraulic equipment, operators are advised to wear suitable gloves.
When clearing blockages, clearing wire, or working with pressurised hydraulic components, operators are
advised to wear suitable eye protection.
When working at the work site, but off the prime mover unit, operators are advised to wear a ‘high-viz’ garment.

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2.6 Cab Guarding
DANGER! For safe operation it is essential that that all guards must be kept in position on the machine
whenever the machine is running. Spearhead Machinery disclaim all responsibility for any
damage or injury arising as a result of guards being removed, or of guards other than of
Spearhead manufacture having been fitted, or of operation of the machine other than in
accordance with these instructions.
DANGER! When hedge cutting or trimming or any operation where the cutting head is not in contact with
the ground, the welded mesh guard; supplied with the machine; must be fitted to the side
window of the prime mover cab. Cabs without laminated or toughened glass must alsobe fitted
with a laminated glass or polycarbonate shield in addition to the welded mesh guard.
WARNING! Inspect guards twice daily or immediately damage is suspected.
Always replace guards that have damage or wear which could impair their performance
2.7 Stability
Due to the design of mowers and the work they undertake, it is essential to ensure that the prime mover is stable
during work and transport in order to eliminate any risk of loss of directional control, imbalance or overturning.
Before work, extend the arms to full reach slowly and ensure that at full reach the rear wheel on the opposite
side to the extended arms is still on the ground. It is advisable to have a helper to check this. Check that the
tyre shows evidence of bearing some load.
If the tyre lifts then add ballast in the form of wheel weights to the rear wheel of the prime mover opposite to the
extended arms until the tyre shows evidence of bearing some load.
Before driving in transport, place the arm mower in the transport position and again check that all wheels of the
prime mover are both on the ground. Again, it is advisable to have a helper to check this. Check that the tyre
shows evidence of bearing load. This is especially important to ensure forward directional control at speed on
an undulating terrain.
If the front tyres lift add ballast weights to the front of the prime mover.
Mesh cab
guard

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WARNING! Failure to have sufficient load over the front axle or to drive at inappropriate speeds on
undulating terrain may result in a loss of directional control.
If ballast weights have been added to the prime mover, check that the plated prime mover axle loads have not
been exceeded.
IMPORTANT: When transporting on the highway, it is the responsibility of the operator to obey all
relevant local highway laws.
2.8 Working On Inclined Ground
The ballast instructions in Section 2.7 are sufficient for level ground operation.
Be aware that when working on inclined ground changes in the prime mover centre of gravity can adversely
affect the overall stability. As the cutting unit is extended with the arm deployed downhill additional ballast will be
required on the rear offside wheel to compensate.
There is naturally a limit to a safe amount of ballast compensation that can be applied for a given prime mover
unit and a given incline. If compensating ballast is applied and the compensated axle must be driven on the
public highway to reach the work site the operator should ensure that the plated axle load is not exceeded.
Remember, a mower arm represents asignificant mass which can generate a significant amount of inertiawhen
moved at speed. Stopping this inertia suddenly can induce overturning reactions.
DANGER! When working on inclined ground avoid high speed hydraulic movements which could cause
overturning.
2.9 Working On Embankments
Sudden potholes at speed can quickly cause the prime mover to change direction. At the same time the weight
of the implement may try to lift the front axle. This is a potentially lethal combination when working along narrow
embankments or dykes and can lead to overturning and potential drowning.
When working on top of embankments it is very important to have sufficient forward stability to ensure rapid
steerage control. Spearhead recommend 20% forward stability. This means that at least 20% of the total
vehicle weight is acting onthesteering axle under normal levelconditions.
DANGER! When working on raised embankments ensure sufficient weight is on the steering wheels.
2.10 Safety Decals
Safety decals are located on various points of the machine see Figure 2.4a for an example cutting unit
attachment and Figure 2.4b for the Twiga Carrier. They can be identified by the yellow upper panel depicting the
hazard, and the lower white panel indicating means of avoidance or precautions to be taken. These decals have
no text. It is essential that all operators and personnel associated with the machine fully understand their
meanings, which are shown in Figure 26.
Safety decals should be kept clean and legible at all times. Any safety decals which are found to be missing or
illegible should be replaced.

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Figure 2.4a
Figure 2.5b
(SP23-HD Cutterbar shown)
Figure 2.6

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2.10.1 Proposition 65
Operating, servicing and maintaining this equipment can expose you to chemicals including gasoline, diesel fuel,
lubricants, petroleum products, engine exhaust, carbon monoxide, and phthalates, which are known to the State
of California to cause cancer and birth defects or other reproductive harm.
To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle
in a well-ventilated area and wear gloves and wash your hands frequently when servicing your vehicle. Battery
posts, terminals and related accessories contain lead and lead compounds, chemicals known to the state of
California to cause cancer, birth defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov.
This website, operated by California's Office of Environmental Health Hazard Assessment, provides information
about these chemicals and how individuals may be exposed to them.
Figure 2.6

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3 Machine Preparation
3.1 Prime Mover Requirements
Before fitting the machine to the tractor ensure that specification of the tractor meets the requirements listed
below.
3.2 Prime Mover Checks
Availability of prime mover hydraulic service where the available flow is 50 to 80 litres per minute.
A suitable mounting interface to the prime mover is available.
Once the machine is mounted to the tractor and the tractor is correctly ballasted ensure that the
maximum axle loads for the tractor have not been exceeded. Failure to meet this requirement may
render the operator liable for infringement of public highway regulations.
Ensure that the tyres fitted to the tractor are correctly rated for the total working weight. NOTE: When
the cutting head is deployed in work at the furthest reach the load on the rear tyre on the cutting side
increases significantly.
Spearhead does not endorse the use of water ballast within tyres as this can have adverse effects on
fore aft stability at speed.
3.3 Lifting The Machine
The machine will normally be delivered with the arms fully assembled to the support frame, but with the cutting
unit detached. If this is not the case then specific re-assembly instructions will be provided with the machine.
WARNING! Only personnel experienced in lift and hoist operation should be involved in lifting machines.
The lifting points; indicated in the Machine general specification in chapter 1 –‘Machine description’; are for
machines without the cutting unit attached. Ensure the correct points are used to suit the machine's condition,
as the centre of gravity changes with different configurations (head attached / detached) - Exercise caution!
3.4 Controls Overview
Your Spearhead machine will be supplied without a control system and will rely on the auxiliary controls
available with the prime mover. The operator must make sure he is familiar with the use of the prime mover
auxiliary controls. Refer tothe prime mover operator manual for guidance.
3.5 DIN Mounting To The Prime Mover
The Twiga Carrier attaches to a variety of prime movers via a DIN type interface. The prime mover can be a
tele-handler or front loader arms on a tractor, for instance. With these types of machines, an interface kit is
usually supplied that will integrate to the quick-attach system, or otherwise the Twiga Carrier can bolt straight on
with the aid of the multiple mounting holes supplied on the back of the mounting plate, see Figure 3.5.1
The attached images show a plate system used on a front loader unit. The unit uses a quick release pin that is
actuated from the tractor to secure the load onto the loader arms, and a hook arrangement at the top.