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Summary of Contents for Spearhead TWIGA MID S55
- Page 1 TWIGA MID TWIGA MID S55/S60/T65/T70 FR55/FR60/VFR55/VFR60 Edition 1.8 – December 2020 PART No. 8999056...
- Page 2 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.
- Page 3 TWIGA MID CAUTION: DO NOT OVER TORQUE HYDRAULIC FITTINGS AND HOSES TORQUE SETTINGS FOR HYDRAULIC FITTINGS HYDRAULIC HOSE ENDS PORT ADAPTORS WITH BONDED SEALS Setting Metric Setting Metric 1/4” 1/4” 18 Nm 19 mm 34 Nm 19 mm 3/8” 3/8” 31 Nm 22 mm 47 Nm...
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Page 4: Table Of Contents
TWIGA MID Contents General Information Introduction Specification Safety Safety Recommendation Overhead Power Lines Safety Decal Warning Signs Road Work Guidelines Lighting Kits Training Tractor Requirements Lifting Points Installing your Machine Attaching your Machine to the Tractor – Using 3 Point Linkage Attaching your Machine to the Tractor - Using Axle Mounting Running up your Machine Removing from the Tractor... - Page 5 TWIGA MID Service & Maintenance Daily Grease Points Torque Settings Hydraulic Hoses Oil Supply Filtration Maintenance Pin & Bushes Storage Regular Service Chart Diagnostics Pump & Motor Failure Prevention Trouble Shooting...
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Page 6: Introduction
TWIGA MID Introduction The TWIGA MID is a very robust high capacity reach mower that is easy to operate and maintain. To ensure trouble-free operation this manual should be carefully studied. The term Left and Right hand applies to the machine when coupled to the tractor and viewed from the rear, this also applies to the tractor. -
Page 7: Specification
TWIGA MID Specification FR55 FR60 Weight inc. Oil (Kg) 1310 1330 1420 1480 1360 1390 Weight of head (Kg) Min. tractor power (Hp) 3500 3750 4000 4500 3500 3750 Min. tractor weight (Kg) Oil tank capacity (ltr) Reach A (m) Reach B (m) Reach C (m) Reach D (m) -
Page 8: Safety Recommendation
TWIGA MID Safety Recommendations Beware of the following Potential Dangers associated with the use of this machine: • Becoming trapped when hitching or unhitching • Tractor overbalancing when arm is extended • Electrocution due to hitting overhead power lines • Getting caught on rotating power take off (PTO) •... - Page 9 TWIGA MID • Follow the manufacturer’s instructions for attachment and removal of machine from the tractor are warning signs to alert others to the type of machine working in the vicinity. Signs should be placed at both ends of the work site and should be in accordance with Department of Transport recommendations.
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Page 10: Overhead Power Lines
TWIGA MID Overhead Power Lines It cannot be stressed enough the dangers involved when working in the vicinity of Overhead Power Lines (OHPLs). Some of our machines are capable of reach in excess of 8 metres (26’); they have the potential to well exceed, by possibly 3 metres (9’... - Page 11 TWIGA MID Definitions of Exclusion Zones Risk Assessment Before starting to work near OHPLs you should always assess the risks. The following points should be observed; Know the risks of contacting OHPLs and the risk of flashover. Find out the maximum height and maximum vertical reach of your machine. Find out the location and route of all Power Lines within the work area.
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Page 12: Safety Decal
TWIGA MID Safety Decal Warning Signs You are advised to display clear warning signs to indicate the type of machine when working in public places. The signs should be carefully placed at either end of the work site to give advanced warning of the hazard. Contact your local Highways Authority or Department of Transport for more information. -
Page 13: Lighting Kits
TWIGA MID Training It is the responsibility of the Spearhead dealer to provide instruction on the safe installation, operation and maintenance of the machine in the first instance. Further training is available from Spearhead Machinery Ltd on request, at cost. -
Page 14: Attaching Your Machine To The Tractor - Using 3 Point Linkage
TWIGA MID Attaching Machine To Tractor – 3 Point Linkage 1. Reverse tractor to machine and attach lower links. 2. Fit stabiliser bracket into top link clevis and fit top link. The standard link comes with a Cat III hole plus a Cat III to Cat II reducing bush, a 28mm bracket is available on request. - Page 15 TWIGA MID 4. Raise machine to required height. Both P.T.O. shafts should be roughly in-line, an upward angle of up to 17° is acceptable to ensure adequate clearance. 5. Adjust the top link so that the machine sits vertically. 6. Fit locking pins to stabiliser tubes, then the linkage can be lowered so that the weight of the machine is taken by the stabilisers.
- Page 16 TWIGA MID 7. It is recommended that the controls are mounted in-place of the seat armrest on the side of the cutting head. A pivoting bracket is supplied with every machine, if additional brackets are required contact your local dealer. A 12v/30Amp power supply will be required.
- Page 17 TWIGA MID 9. Raise leg stands to ensure they don't get damaged. Adjust check chains ensure the machine is secure and cannot swing from side to side. 10. Use only tractors with safety glass. If windows are not laminated safety glass, polycarbonate glazing must be fitted between operator and cab meshing.
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Page 18: Attaching Your Machine To The Tractor - Using Axle Mounting
TWIGA MID Attaching Machine To Tractor – Axle Mounting Mount axle brackets as instructed on separate fitting sheet specific to your tractor type. 2. Detach tractor draft links. 3. Fit lift-in hitch assembly 4. Assemble sub frame to suit axle width 1m or 1.1m, mount sub frame assembly to your machine using bottom pin holes. - Page 19 TWIGA MID 5. Offer up frame to tractor and adjust to give required length. Distance “X” to be kept to the minimum ensuring the machine is close coupled, as a guide set the same as original. Attach tractor lift links to frame with suitable pins.
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Page 20: Running Up Your Machine
TWIGA MID Running Up Your Machine 1. First ensure the rotor is in the ‘off’ position and P.T.O. drive is disengaged, and then start the tractor. 2. Engage P.T.O. into gear and run machine up to half revs allowing oil to circulate for about 5 minutes before operating arms. -
Page 21: Removing From The Tractor
TWIGA MID Removing from the tractor The following steps MUST be followed in exactly the same order in which they appear, with removal of the top link being the last action before driving the tractor away. Do not attempt to operate machine controls through the rear cab window whilst standing on or amongst the linkage. -
Page 22: Multipilot Controls
TWIGA MID MULTIPILOT Controls Tele Tele LH - Tele Out LH - Tele In RH - Tele In RH - Tele Out Arm Float On Head Float On Slew Slew LH - Slew Out LH - Slew In RH - Slew In RH - Slew Out Head Crowd Head Crowd... - Page 23 TWIGA MID MULTIPILOT Switch Box Hour counter logs rotor hours in forward or reverse: Warning It is critical that the rotor is given time to “run-down” and come to a complete stop before an alternate direction is selected, switching directly from one direction directly to the other will result in the system locking and could lead to premature failure.
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Page 24: Hydraulic Proportional Pro Pilot Controls - 3Sv
TWIGA MID PRO PILOT Hydraulic Control - 3SV PRO PILOT Electric Control - 3SV Tele Tele LH - Tele Out LH - Tele In RH - Tele In RH - Tele Out Slew Slew LH - Slew Out LH - Slew In RH - Slew In RH - Slew Out Head Float On... -
Page 25: Pro Pilot Switch Box
TWIGA MID PRO PILOT Switch Box Power Indicator Auto Reset Hydraulic Roller Power ON/OFF Hour Meter Rotor Autopilot Reverse Rotor Arm Float Spare Spare... -
Page 26: Operation Warnings
TWIGA MID The switch box is supplied with a suction pad to allow the box to be mounted to the tractor cab window for ease of reach. Operational Warnings • Never drive the tractor with arm out stretched (except when cutting). When moving at work always first retract arms. - Page 27 TWIGA MID • Never attempt to slew arms with the head on the ground, always raise the head before slewing. • Never change/reverse the rotor rotation until it has come to a standstill, serious damage will occur leading to premature pump and/or motor failure.
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Page 28: Moving Into Transport Position
TWIGA MID Moving into transport position Warning Always transport machine with the slew-locking pin fitted and the arms closed in the transport position on the bump stops. Avoid high transport speeds, which will cause unnecessary strain on machine and tractor. Never travel with the reach arm away from bump stop on the main arm failure to adhere to this warning will cause damage to ram seals and arms. - Page 29 TWIGA MID +300m 4. Turn main lift ram isolation tap to off. 5. Fit slew locking pin to secure slew post to A frame. Warning : Do NOT attempt to slew machine until locking pin has been removed, serious damage will occur to machine frame.
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Page 30: Operation
TWIGA MID Operation Transport to work position • Remove locking pin from slew post. • Turn lift ram isolation tap to on position. • Ensure rotor/motor switch is off. • Engage PTO low revolutions. • Lower main lift ram only, until main arm is vertical. •... - Page 31 TWIGA MID Reversing Head Drive • Ensure the rotor has stopped spinning or is not blocked; failure to ensure this will cause irreparable damage to hydraulic components. • Change rotor rotation via the button on Pro Pilot & Multi Pilot which have an electronic delay or via the rocker switch on the 2SV, which is fitted with a locking gate to prevent accidental reversal.
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Page 32: Oil Cooler
TWIGA MID Oil Cooler The optional fitment of an oil cooler prolongs the life of the hydraulic oil and components in hot and arduous conditions. It is important to connect the power lead to the control box directly to the tractor battery. -
Page 33: Head Float
TWIGA MID Head Float Head Float Head Float This option allows the flail head to follow contours of the ground without having to constantly control the angle of the head. The centre of balance is the best mounting point for the head if head float is to be used properly. -
Page 34: Arm Float
TWIGA MID Arm Float Arm Float This is only to be used in verge mowing set up, it will reduce weight on the rear roller allowing head to move more easily, following small changes in ground contours in a forward motion, with the aid of a pre-charged gas accumulator. Operating The Arm Float To select arm float, first lower the flail head to the ground before operating the switch. -
Page 35: Debris Blower
TWIGA MID Debris Blower Hydraulically driven fan from tractor external services, please quote tractor oil flow when ordering (maximum 40lt per min). The return oil must go to a free flow connection i.e. filler plug. Avoid quick release couplings. Operating The Debris Blower The fan is suitable for clearing cuttings off the highway;... -
Page 36: Hydraulic Rear Roller
TWIGA MID Hydraulic Rear Roller The hydraulic rear roller is controlled by the tractor spool. The roller can either be raised or lowered to the desired position for either hedge or grass cutting. The hoses to the tractor and valve are supplied with the cutting head, the hoses down the arm are supplied with the machine. -
Page 37: Autopilot
(see right). Ensure you fully understand the operation of the Spearhead Autopilot, which will reduce machine and operator fatigue and improve hourly output, machine life, standard of work and comfort to the operator. - Page 38 TWIGA MID Set-Up: Correct position of micro switches Bolt “A” Screw “B” Fig. 2 1. Place rear roller on the ground 2. Ensure the locking pins (fig.1) are installed into the Auto-pilot with the arm fully lowered 3. Engine turned off, key removed and PTO disengaged. 4.
- Page 39 TWIGA MID Summary You must ensure that the micro switches make and break a circuit as the cams rotate through their arc of travel. It is very important to correctly set the micro switches to ensure the electrical circuit functions, the switch lever arm must follow its own cam and not be influenced by the opposite cam also the lever must be bent towards or away from the cam to allow the electric circuit to open and close in accordance to the cam position...
- Page 40 TWIGA MID Auto Pilot Switch Alignment Bend lever arm of switch to align with the middle of each cam, ensure they don’t overlap onto the adjacent cam. Alternative Settings Move the cams apart to increase amount of weight carried on the rear roller, thereby reducing the sensitivity of the auto-pilot If the cams are too close together...
- Page 41 The operator will control reach whenever necessary. The Spearhead Autopilot will assist you with grass mowing. It does not relieve you of your responsibility to drive with care and understanding for the machine.
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Page 42: Telescopic Arm
TWIGA MID Telescopic Arm Description Telescopic extending arm provides extra reach, particularly useful for deep ditches, banks and for reaching high hedges. Operating the Telescopic Arm Use the electric switch to adjust the length of the extending telescopic dipper arm to suit working conditions and use dipper ram to vary reach as required. Over frequent use of telescopic arm will cause premature wear of adjustable pads. -
Page 43: Forward Reach
TWIGA MID Forward Reach - FR and VFR Description This useful feature provides extra visibility particularly when topping a hedge, or verge mowing. Operating the Forward Reach Before operating the arm, ensure the head is one metre off the ground and at least two metres away from the tractor. -
Page 44: Height Limiter
TWIGA MID Height Limiter The Height Limiter option is intended to provide a means to control the maximum height that the machine can work to but is limited by the setting chosen and the positioning of the cutting head. The system is turned OFF and ON via the AUX2 toggle switch on the switch box. Only the lift function will be limited, all other functions will continue to function. -
Page 45: Service & Maintenance
TWIGA MID Service and Maintenance Daily grease points TWIGA machine Optional - Autopilot... -
Page 46: Torque Settings
TWIGA MID Washing your machine Grease all your machine and optional parts after each time you wash your machine. Gearbox Before first use check gearbox oil level, thereafter check every 8 hours. After the first 50 hours drain and replace the gearbox oil, thereafter annually. Replace with EP90. -
Page 47: Hydraulic Hoses
• Hoses with damaged metal braid should be replaced. • When replacing hoses quote number stamped on fitting at one end. The Spearhead hydraulic system works at very high pressure, when replacing hoses use only genuine hoses, a burst hose could be very dangerous. -
Page 48: Oil Supply
TWIGA MID Oil Supply • Daily before starting up check oil level in tank reservoir. • It is a good practice to constantly keep an eye on the tank level gauge, (this can be seen from the tractor seat) as a pipe burst could empty the tank within minutes. -
Page 49: Pin & Bushes
All main pivot points are furnished with replaceable bushes. If there are any signs of wear, these must be replaced. All bushes are available from Spearhead Parts Department. Warning Do not use grease containing Molybdenum disulphide on nylon bushes and wear pads. -
Page 50: Regular Service Chart
TWIGA MID Regular Services Chart Service Hours Service points 1-4 hrs Bolts are fully tightened Condition of flails Condition of hoses especially for chafing Flail bolts are fully tightened Flail head retaining bolts are fully tightened Gearbox seals (If oil is leaking replace immediately) ( X ) Inspect leaks from fittings and pipes Pins and bushes... -
Page 51: Trouble Shooting
TWIGA MID Trouble Shooting Problem Cause Solution Gearbox overheating Oil level incorrect Check oil level Oil grade incorrect Check oil grade Implement overloaded Reduce forward speed Wrong PTO speed Ensure tractor PTO speed matches implement Excessive belt wear Belt and pulley condition Replace if necessary Pulley alignment Check alignment... - Page 52 TWIGA MID Trouble Shooting Problem Cause Solution Irregular arm movement Spool contacting with housing Check spool is free moving Broken spring in spool valve Check spring Failed ram seals Repair ram Electrically operated Faulty wiring Check wiring and switches valve not responding Dirt in valve Check of ingress of dirt Sticking valve...
- Page 53 TWIGA MID Spearhead Machinery Ltd Station Road Salford Priors Evesham Worcestershire WR11 8SW Tel: 01789 491860 Fax: 01789 778683 www.spearheadmachinery.com enquiries@spearheadmachinery.com...
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