Spearhead TWIGA MINI Assembly instructions

8999182EN: v1.0 11/05/2023
1 Original instructions (ENGLISH)
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Spearhead Machinery
Operator Instruction Manual For
2.6m-3.7m 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:
https://my.spearheadmachinery.com/warranty/machine-registration/
Should you experience any problems registering a machine in this manner please contact the Spearhead
Service Department on 01789 491867.
Confirm to the customer that the machine has been registered in the section below.
Registration Verification
Model Type:
Twiga Mini
Model Number:
99___________
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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Twiga Mini Reach Arm Mower With Cutterbar Attachment
This manual covers the Twiga Mini series of tractor mounted reach arm mowers with cutterbar attachments.
These machines are available in a:
•2.6m standard arm variants with 1.2m cutterbar attachment (Twiga Mini S26)
•3.7m standard arm variants with 1.6m cutterbar attachment (Twiga Mini S37)
•3.7m variable forward reach arm variants with 1.6m cutterbar attachment (Twiga Mini VFR37)
All variants of machine are available in left-hand and right-hand builds to cater for different markets.
These machines are designed to be fitted on Category 1 tractors with a starting minimum horsepower of
20hp (15kW) (S26) and a minimum tractor weight starting from 500kg (1102lbs) (S26). See the specific
minimum tractor weight requirement of each specific reach arm model in Section 1.6.
All machines are all fitted with hydraulic rams which allow for the cutting attachment to be placed in infinite
positions and allow the reach arm the ability to compactly fold making the machine legal for road
transportation.
Twiga reach arm machines can be specified with various specifications of hydraulic supply and control
operating systems to suit the end user’s specific requirements.
It is essential that the safety guards are always fitted during operation 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 the consequences of such use which, in addition, voids the machine
warranty.

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Contents List
1Introduction.............................................................................................................................................8
1.1 Preliminary Information.............................................................................................................8
1.2 Information About The Manual.................................................................................................8
1.3 General Features Of The Hedge Cutter...................................................................................9
1.4 Identification..............................................................................................................................9
1.5 Main Components...................................................................................................................10
1.6 Technical Data........................................................................................................................11
1.6.1 Tractor Requirements................................................................................................11
1.6.2 Hedge Cutter Specification........................................................................................11
1.7 Reach Diagrams .....................................................................................................................12
1.7.1 S26.............................................................................................................................12
1.7.2 S37.............................................................................................................................13
1.7.3 VFR37........................................................................................................................14
2Safety....................................................................................................................................................16
2.1 General Safety Rules..............................................................................................................16
2.2 Safety Rules For Transportation, Installation And Use..........................................................16
2.2.1 Transport ...................................................................................................................17
2.2.2 Installation..................................................................................................................18
2.2.3 Tractor Balancing ......................................................................................................19
2.2.4 Use.............................................................................................................................20
2.3 Personal Safety.......................................................................................................................22
2.4 Noise Level..............................................................................................................................23
2.5 Overhead Dangers..................................................................................................................23
3Installation.............................................................................................................................................24
3.1 Preliminary Information...........................................................................................................24
3.2 Attaching To The Three-Point Hitch.......................................................................................24
3.3 Hedge Cutter With Independent Hydraulic System................................................................25
3.4 Hedge Cutter Without Independent Hydraulic System (Standard)........................................25
3.5 Tractor Balancing....................................................................................................................26
3.6 Removal..................................................................................................................................27
3.7 Storage....................................................................................................................................27
4Operation And Use...............................................................................................................................28
4.1 Operation.................................................................................................................................28
4.1.1 General Instructions ..................................................................................................28
4.1.2 Controls......................................................................................................................28
4.1.3 Joystick Controls .......................................................................................................30
4.1.4 Automatic Cutterbar Direction (option)......................................................................31
4.2 Use..........................................................................................................................................31
4.2.1 General......................................................................................................................31
4.2.2 VFR Model.................................................................................................................32
5Maintenance .........................................................................................................................................34
5.1 Maintenance Instructions........................................................................................................34
5.2 Planned Maintenance.............................................................................................................34
5.2.1 Daily Checks..............................................................................................................34
5.2.2 Monthly Checks Or After 150 Hours Of Operation...................................................35
5.2.3 Annual Checks Or After 1200 Hours Of Operation...................................................35
5.3 Lubrication...............................................................................................................................35
5.3.1 Grease Supply Points................................................................................................35
5.3.2 Checking The Oil Level In The Tank (if fitted)...........................................................35
5.3.3 Checking The Oil Level In The Gearbox (if fitted).....................................................36
5.3.4 Topping Up Or Changing The Oil (if fitted)...............................................................36
5.3.5 Checking And Replacing The Oil Filter.....................................................................37
5.4 Troubleshooting ......................................................................................................................38
6Demolition.............................................................................................................................................40
6.1 Separation Of Waste Material And Disposal..........................................................................40
7Spare Parts...........................................................................................................................................42
7.1 Genuine Spare Parts ..............................................................................................................42
7.2 How To Obtain The Correct Spare Part Numbers.................................................................43

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7.3 Spare Parts Ordering..............................................................................................................44
7.4 Dealer Network .......................................................................................................................44

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1 Introduction
1.1 Preliminary Information
Each hedge cutter is supplied with a copy of this manual. The instructions contained herein are applicable to all
models of the Twiga Mini series.
All users (operators) of the hedge cutters must read this instruction manual before using the machinery.
Unfamiliarity with the machine, improper use and non-observance of the safety rules could cause serious injuries
to the operator and/or damage to the hedge cutter. All this can be avoided by carefully following the indications
given in this booklet.
WARNING! All technical safety measures against impacts of handling and risk of cuts, adopted in the
design of the hedge cutters (currently the same for all manufacturers) do not allow absolute safety.
Unfortunately there is still a residual risk which cannot be eliminated due to the particular operating
characteristics of the machine. It is therefore essential that no one stand within the machine’s working
range when it is in operation. Special care should be taken when working near roads and/or buildings.
1.2 Information About The Manual
This manual must be kept in good condition, complete in all its parts and on the machine for consultation if
necessary. Please read this instruction and maintenance manual carefully and follow all indications precisely
both before and after use, check-ups and operation. Should the user find it difficult to understand any of the
instructions given herein, we kindly ask them to contact their local Spearhead dealer or Spearhead Machinery.
They shall clarify any points and may also decide to improve sections of the manual so they are easier to
understand. The revised parts will be sent to the customer.
This manual has been drawn up in compliance with the regulations currently in force and/or technical knowledge
available at the time of going to print. It is an integral part of the machine and must be kept with the machine
should it be sold on.
Some of the figures in this manual illustrate details or accessories which could be different from those on your
machine. Please contact your local Spearhead dealer or Spearhead Machinery if you have any doubts.
The instructions in this manual are intended for professional operators with specialised knowledge of how to
drive the tractor that the machine will be fitted to. They must be authorised, experienced and suitably trained.
The machine must be used by a single operator in compliance with the instructions in this manual; any use other
than the one specified is considered improper and may lead to serious risks for objects and persons. No
changes may be made to the machine or the conditions of use. If the operator identifies possible risks which
have not been foreseen by Spearhead, they must stop using the hedge cutter and immediately notify Spearhead
Machinery so they can carry out an in-depth assessment of the risk and modify the machine to meet the proper
safety requirements.
The following terms are used in this manual:
•Right/Left indicates the parts of the hedge cutter as seen when standing behind the tractor with the
machine attached to it; facing the work direction.
•WARNING! Indicates that the operator must be familiar with all aspects of this particular subject;
•NOTE indicates a subject which will make the operation of the machine easier for the operator.

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1.3 General Features Of The Hedge Cutter
The hedge cutter is a modern piece of equipment that allows grass and hedge cutting and pruning. It can be
fitted to the hydraulic lifting system of any tractor provided it has a universal three-point hitch. Its functions are
completely hydraulic thanks to its connection to two hydraulic valves located on the rear of the tractor.
The hedge cutter features valve block cable controls that are located inside the tractor cab and allows the
operator to fully control the machine and keep watch over the road all while remaining comfortably seated.
The hedge cutter is produced in a STANDARD model (with flexible cable commands) and in an OPTIONAL
model (with electrohydraulic proportional controls).
1.4 Identification
Each machine is equipped with a serial plate; see Figure 1.2 that includes the following data in this order:
1. UKCA Conformity Marking.
2. Machine Whole Goods Code (WGC).
3. Serial number of the machine.
4. Mass in kg.
5. Production Year (year of construction).
6. Design conformity standard.
7. Machine Product Group Code.
8. EU Authorised Representative QR scan code.
9. Manufacturer marking with name and address.
10. EAC Eurasian/Russian Conformity Marking.
11. EC European Conformity Marking.
12. Product Group Code.
Figure 1.2 –Serial Plate
Data on the Spearhead manufacturer’s plate should always be referred to when requesting assistance and/or
requiring replacement spare parts.
This data can identify the machine and its characteristics and specification for its particular time of manufacture,
certifying that it responds to current regulations. For this reason the plate should never therefore be removed nor
be used for other purposes; if the machine is dismantled, it should be destroyed to prevent any form of abuse.
By utilising a smart phone and scanning the Authorised Representative QR scan code found on the right-hand
side of the serial plate (ref 8, Figure 1.2) using a suitable QR scanning App, you can find details for Spearhead
Machinery authorised representatives for its various territories.

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Figure 1.3 –Serial Plate Location
WARNING! It is absolutely forbidden to alter and/or erase the data on the identification plate or any
data found on the machine parts.
1.5 Main Components
Item No.
Description.
Item No.
Description.
1
Lift Coupling
9
Dipper Ram
2
Universal Three-Point Hitch
10
Linkage
3
Lift System Hose Coupling
11
Dipper Arm
4
Valve Block
12
Cutterbar Rotor
5
Control Levers (With Cables)
13
Bar Coupling
6
Main Arm Ram
14
Leg
7
Main Arm
15
Cutterbar Motor
8
Bar Angle Ram
Figure 1.4 –Reach Arm Components
(S26 model shown)

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1.6 Technical Data
1.6.1 Tractor Requirements
Technical Data
Model
S26
S37
VFR37
Minimum Power (hp)
20
30
30
Minimum Weight (kg)
500
700
700
Power Take-off Speed (rpm)
540
540
540
Minimum Tractor Width (mm)
1000
1200
1200
Three-point Hitch Category
I
I
I
Table 1.1 –Twiga Mini Tractor Requirements
1.6.2 Hedge Cutter Specification
Technical Data
Model
S26
S37
VFR37
Hydraulic System
Oil Tank Capacity (litres)
25
25
25
Filter (micron)
30
30
30
Hydraulic Oil (grade)
HD46 or equivalent
Gearbox Oil (if applicable)
EP80-90 or GL-4/GL-5 or equivalent
Circuit Pressure (bar)
180
180
180
Capacity (l/min)
15/20
20/25
20/25
Cutterbar
Working Width (mm)
1200
1600
1600
Weight (kg)
70
70/100
70/100
Max Cutting Diameter (mm)
20
20
20
Standard Weight (kg)
190
240
240
Table 1.2 –Twiga Mini Specification

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1.7 Reach Diagrams
1.7.1 S26
Figure 1.5 –Twiga Mini S26 Reach Diagram

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1.7.2 S37
Figure 1.6 –Twiga Mini S37 Reach Diagram

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1.7.3 VFR37
Figure 1.6 –Twiga Mini VFR37 Reach Diagrams

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2 Safety
2.1 General Safety Rules
Failure to obey even the simplest safety rules is the cause of most accidents in the workplace. The majority of
accidents can be prevented if the correct safety measures are put in place beforehand. It is therefore extremely
important to carefully read and follow all the instructions in this manual and take all the necessary safety
measures before using the hedge cutter. The hedge cutter must be used by authorised personnel over the age
of 18 who hold a driving license, are experienced, qualified and trained to operate it. Never use this machine is
you are tired, ill or under the influence of alcohol, drugs or medicine. Spearhead Machinery will not be held
responsible for accidents caused by negligence on the part of the operator or by the non-observance of
the safety rules.
When the machine is being used, serviced, repaired, moved or stored, the operator must wear safety shoes,
overalls, safety gloves and, if necessary, hearing protection (Section 2.4), a dust mask and a hard hat to protect
against falling objects (especially when working at heights).
2.2 Safety Rules For Transportation, Installation And Use
The hedge cutter is secured in the TRANSPORT POSITION prior to delivery to the customer or dealer. This
position must always be adopted when transporting the hedge cutter to the work site, even if it is already
attached to the tractor.
To secure the machine in the transport position, proceed as follows:
•Cover the blades of the cutterbar rotor with a protective device.
•For the VFR model, before bringing the arms back, move the cutterbar back to the rear position.
•Retract the main and dipper arms so that they are parallel.
•Fully retract the cutterbar hydraulic ram and position parallel to the dipper arm.
Figure 2.1 –Twiga Mini Arm Closing
(S26 model shown)
A label has been placed near the two connection points. The label contains the pictogram of a lock to show that
these points serve to lock the machine in place.

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2.2.1 Transport
The transport position is necessary to distribute the weight of the machine and allow for better balance. To lift the
hedge cutter, use a crane equipped with the proper slings to hold its weight, which is given on the identification.
plate. Trained personnel must perform this operation, holding the hedge cutter by its hooking points, which are
also marked by a sticker with a hook. Tie the hedge cutter to the truck/trailer to ensure it does not slip during
transportation.
Figure 2.2 –Twiga Mini Lifting Point Locations
(S26 model shown)
If the hedge cutter is transported while still attached to the tractor, lift it by means of the tractor’s hydraulic lifting
system until its lowest point is at least 30 cm off the ground. Lock the lever activating the lifting system. Raise the
stabilising feet on the hedge cutter and block them with the catch split pins.
Always follow the rules below when travelling on public highways:
The hedge cutter must always be in the transport position;
Apply the relevant warning signs to indicate the rear bulk of the machine and the tractor. It is useful to
remember that:
•The FRONT OVERHANG must not exceed 60% of the length of the tractor without ballast;
•The REAR OVERHANG must not exceed 90% of the length of the tractor without ballast;
•The TOTAL LENGTH OF THE COMBINE should not be more than double the length of the
tractor without ballast;
•The WIDTH of the hedge cutter must be less than 2.5 metres;
•The SIDE OVERHANG of the hedge cutter must not exceed 1.6 metres in relation to the
tractor’s longitudinal axis of symmetry.
•Should the maximum width of the hedge cutter exceed 2.5m or the side overhang be more
than 1.6 m, it is necessary to obtain the relevant authorisation from the competent authority;
•Warning signs indicating the bulk of the hedge cutter must be applied on its three visible sides;
they must be retroreflective and fluorescent with red and yellow stripes of the approved type

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The flashing light on the tractor must be working;
The repeated indicators must have their own switch;
The hedge cutter control board must be protected by a frame to prevent the levers accidentally being
activated;
The tractor’s PTO must be disengaged and its lever locked;
The cutterbar rotor (cutterbar shaft) must not be moving, even for short distances;
The TOTAL MASS must not exceed 30% of the NORMAL mass of the tractor as indicated in the
vehicle registration documents;
In static conditions the MASS transmitted by the driving axle of the tractor on the road must not be less
than 20% of the NORMAL MASS;
Drive slowly, particularly on bumpy roads;
Follow all local traffic regulations;
The tractor is equipped for occasional use with a hedge cutter, but it is still a farm tractor in every
respect.
2.2.2 Installation
The hedge cutter is usually attached to farm tractors by means of a universal three-point hitch which is
commonly found at the rear of the tractor. All tractors must be equipped with a roll bar or a cab fitted with
ROPS or FOPS as required by the regulations currently in force.
It is absolutely forbidden to attach the hedge cutter to tractors without a cab or a roll bar.
Before attaching the hedge cutter to the tractor, the customer must make sure that the tractor meets the
following requirements:
It must be suitable to work with the hedge cutter;
It must have the necessary power;
It must have a hook (lifting device) which meets with regulations;
The tilting momentum of the first arm of the hedge cutter must be compatible with that permitted by the
tractor. The figure indicates the weight and the centre of gravity with the boom arm at its maximum
extension, in relation to the centre line of the tractor.
Since it is impossible to list all possible combinations of tractor and hedge cutter, for safety reasons each
combination must be previously tested and deemed suitable to avoid the risk of overturning.

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2.2.3 Tractor Balancing
The following steps must be taken to check the balancing of the tractor. Check the lifting capacity and
longitudinal stability of the tractor using the following formula (referring to the drawing) and, if necessary, apply
ballast.
Figure 2.3 –Twiga Mini Lifting Point Locations
Ms ≤0.2Ti + Z(d+i)
M≤0.3T (*)
(Ms) –(0.2Ti)
Z ≥ --------------------------------
(d+i)
In the formula:
•I =tractor wheelbase
•d =distance from the front axle to the ballast
•s = overhang of the rear axle of the hedge cutter
•T = tractor mass+ 75 kg (operator);
•Z = mass of the ballast
•M = full-load mass
To calculate the overall weight of the machine, add up the individual weights of each of its parts.
The front tractor axle is lightened in relation to the weight attached when the hedge cutter is fixed to the tractor:
the load of the front axle must be at least 20% of the empty tractor weight. It is mandatory to check the lifting
capacity and stability of the tractor to prevent overturning and/or the steering wheels losing their grip.
After the hedge cutter has been attached to the tractor, lift it completely off the ground and check the tractor does
not lose its balance. Set the tractor wheels to maximum track (Figure 2.4), making sure this width complies with
the value given on Table 1.1.
Apply the ballast where necessary: on the rear wheel of the tractor opposite the extended arm and on the front of
the tractor (Figure 2.5). In extreme cases and only during operation, lock the front axle articulation by inserting a
special mechanical lock (Figure 2.6).
Figure 2.4
Wheel Track
Figure 2.5
Ballast
Figure 2.6
Front Axle Articulation

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WARNING! Never work with the arms extended when the tractor is on sloping ground. Always secure
the hedge cutter in the central position during transportation.
2.2.4 Use
The hedge cutter must only be used for the operations it was designed and built for. Its technical features must
not, in any way, be modified to alter its performance. Failure to comply with this rule will result in the warranty
becoming null and void and Spearhead Machinery being immediately released of any liability.
Before starting the tractor, always perform the daily maintenance operations (described in Section 2.2.1) and
take the following precautions:
Check the position of the ballast on the tractor in relation to the different distribution of the weights on
the axles; always take this into account when driving, particularly when turning and using the brakes,
to ensure safe driving (see Section 3.5);
Make sure the hedge cutter has been correctly attached to the tractor and that all the locking and
safety devices are in place and in good working order;
Check the tractor is equipped with rear view mirrors on both sides of the cab and if it is not, fit them.
The operator must be able to check both the traffic and the hedge cutter while working;
Make sure the PTO is disengaged with the lever locked and that the rpm is correct (540 rpm);
WARNING! The PTO must always be engaged when the engine is off;
Check all the control levers are in the neutral position "0"; see Section 4.1.2;
Make sure there is nobody within the working range of the cutterbar.
The operator must keep a clear work range –both in front of and behind the bar –of about 20 metres
and in all directions, for a total radius of 20 metres;
Never wear clothing which could become entangled in the moving parts.
Start the tractor engine and engage the PTO. Before setting out for the work site, the operator must familiarise
themselves with the machine and the control levers, moving them in sequence to check how each function
works. Unfamiliarity with the machine, improper use or a wrong movement could cause serious damage to
people and objects.
When the machine is being transported and then when it is in operation, the operator must take the following
precautions:
Never allow any passengers on the tractor;
Never carry people or animals on the hedge cutter;
Never use the arms or the cutterbar to lift people or objects;
Never use the cutterbar in immersion;
Always make sure the tractor wheel is not too close to the kerb.
The operator must always check the conditions of the road surface and keep at a safe distance from
the bank. Never use the machine on steep banks as it may jeopardise the stability of the tractor/hedge
cutter;
Never stand between the hedge cutter and the tractor, even if the handbrake is applied and there are
blocks under the wheels;