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Pump and Motor Failure 

 

There are many reasons for pump and motor failure, cavitations (suction of air), peak 
pressure, contamination. These can be avoided by the following: 
 

 

Never run out of oil 

 

 

Never run a cold machine straight up to speed, ensure the engine idle speed before 
engage/disengage the head motor. 

 

 

Never increase or decrease engine speed quickly 

 

 

Regularly check that suction hose and pump fittings are tight. 

 

 

Never stop or start the rotor at 540r.p.m 

 

 

Never cause sudden movements to the arms via your controls or bumps in the 
ground as pressure spikes will by transmitted back to the pump, resulting in failure. 

 

 

Avoid striking the rotor on obstacles i.e., road gullies as this causes pressure spikes. 

 

 

Never transport the machine with the PTO in gear. 

 

 

Never select 1000 speed gear for economy start up, speed is too high. 

 

 

Never operate above recommended PTO speed 540r.p.m. and risk over heating. 

 
Remember: pump and motor warranty is limited to replacement due to faulty materials or 
manufacture. Cavitations, contamination and peak pressures are easily detected on 
inspection, warranty will not be considered if failure is due to misuse.

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Spearhead 

Excel 606, 686, 726 & 836 

57 

Summary of Contents for Excel 606

Page 1: ...to the Machine it relates to please contact the After Sales Department for advice Spearhead Machinery Limited 2004 Spearhead Please ensure that this manual is handed to the operator before using the m...

Page 2: ...Attaching your Machine to the Tractor using 3 point linkage 14 Running up your Machine 18 Removing from the Tractor 19 Set up Hydraulic Electric Controls 20 How your controls work 21 Cutting Head Set...

Page 3: ...Greasing Lubrication 47 Hydraulic hoses 49 Oil Supply 50 Oil Recommendations 50 Filtration Maintenance 50 Flail Head 51 Pin Bushes Storage 52 Torque Settings 53 Regular Service Chart 53 Diagnostics T...

Page 4: ...Highway The highway model has a comprehensive specification to meet the requirements of high output roadside verge mowing This includes a high visibility paint finish mono lever controls rubber safet...

Page 5: ...23 1980 2040 2060 Tractor hp 90 160 120 180 130 180 135 200 Minimum tractor weight kg 4000 4200 4500 5000 Oil tank capacity 265 265 265 265 A reach m 6 1 6 8 7 3 8 3 B reach m 6 8 7 6 7 8 8 7 C reach...

Page 6: ...ng maintenance or repair work Warning Avoid fluid escaping under pressure Consult technical manual for services procedures Warning Carefully read operator s manual before handling this machine Observe...

Page 7: ...g work Beware of the danger of overhead power cables The operator must be aware of the maximum height and reach of the machine when working under power cables The minimum legal height for 11 000 and 2...

Page 8: ...t doesn t meet the manufacturer s specification Never use a machine if the hydraulic system shows signs of damage Never attempt to detect a hydraulic leak with your hand use a piece of card Never allo...

Page 9: ...information contact the Department of Transport or your local Highways Authority Warning Signs You are advised to display clear warning signs to indicate the type of machine when working in public pla...

Page 10: ...necessary for all models Set linkage lift rods to an equal length All machines require a 12v fused supply A 30 amp DIN connector is provided but if not the lead should be taken directly to the vehicl...

Page 11: ...plying dealer or Spearhead Service Department Failure to follow the correct procedure To attach unattached the machine could result in personal injury or machine damage Any resulting damage to a machi...

Page 12: ...ose coupled as a guide set same as original Attach tractor lift links to frame with suitable pins 4 Assemble sub frame to suit axle width 1m or 1 1m mount sub frame assembly to your machine using bott...

Page 13: ...nsert catch locking pin 9 Reverse tractor and attach lower link arms by inserting lower linkage pins into the bottom set of holes 10 Spearhead strongly recommend mounting the control unit to the seat...

Page 14: ...the pins Swing forward stabiliser bars and attach to stabiliser yoke Be sure the stabiliser bars are free to slide Do not fit locking pins 13 Fit top link to machine and the tractor 14 Caution when p...

Page 15: ...Once the stabilising bars are correctly fitted lower the tractor hydraulics allowing all the weight of the machine to be carried by the stabiliser bars use a pry bar to twist tube if necessary 17 If f...

Page 16: ...ing pin Adjust top link 19 Remove locking pin from slew post before operating the machine and slew forward 20 Operate the main arm to bring the frame horizontal by lowering the head weight to the grou...

Page 17: ...hold the machine rigid There must be no sideways movement it is very dangerous 23 Remove parking stands and store safely The machine can not be unhitched without these stands 24 Use only tractors with...

Page 18: ...gain before the machine is put to work 4 Operate the arms through the full amount of travel check all movements are functioning correctly 5 Place flail head near ground in a safe position and with tra...

Page 19: ...rking stands Fig 1 8 Stop engine ensure all weight is off the tractor and machine hydraulics by operating the levers in all directions 9 Remove stabiliser bars lower link pins PTO shaft and control un...

Page 20: ...Rotor on off red Rotor indicator Head float Third arm control 6 Tele VFR black Autopilot isolator red 1 2 Main dipper arm On off switch red Autopilot Angle float or Head float Angle float green 4 Manu...

Page 21: ...How your controls work Spearhead Movements Hydraulic Electric Controls Excel 606 686 726 836 21...

Page 22: ...s and hedges and optimises power to weight ratio Optional 1 5m is best used for hedge trimming to reduce the number of passes However there is less power per flail and an increased weight penalty whic...

Page 23: ...Cutting Head Set up Spearhead Excel 606 686 726 836 23...

Page 24: ...ad Normal hedge cutting Flail is cutting upwards reducing flying debris to minimum and leaving a tidy finish Open adjustable front hood as required Rough cutting Reverse rotation and remove front cowl...

Page 25: ...r roller down to control cutting height Have rubber flap fitted to the front and rear of head and close down the adjustable front hood to reduce flying debris to a minimum Warning Never remove front c...

Page 26: ...nd be very familiar with your machine before ever attempting work Never operate above the recommended PTO speed of 540r p m Failure to heed this warning will result in severe damage i e reduced belt a...

Page 27: ...to this warning will cause damage to ram seals and arms Do not attempt to move the main lift ram until transport link has been removed Failure to adhere to this warning may cause damage to the frame l...

Page 28: ...ort bracket Warning Bracket must be in correct position or main boom may over centre and drop onto cab roof 4 Mount adjustable transport link 5 Ensure top bracket is able to float by removing second r...

Page 29: ...not to run at full speed with cold oil Run at low speed for at least 15 minutes to allow oil to warm up Afterwards slowly increase engine revs to obtain correct PTO speed 540rpm Never attempt to start...

Page 30: ...ecommended for normal use either verge mowing or hedge cutting When auto reset is selected the flail head rises as the arm slews back past an obstacle once past the weight of the head causes the arm t...

Page 31: ...the break back which will overheat the oil A slower forward speed improves the standard of the finish Cut field side and bottom of hedge first Cutting hedge from roadside Warning Never operatewithflai...

Page 32: ...reach of the machine If in any doubt of the danger consult your local electricity company regarding a safe procedure for work Oil Cooler Prolongs the life of the hydraulic oil and components in hot an...

Page 33: ...head if angle float is to be used properly Operating the head angle float Place flail head on the ground and switch on angle float control this opens the head ram to tank and allows the ram to float...

Page 34: ...lever should be operated to take a proportion of the flail head weight off the rear roller This is important as too little weight on the rear roller will leave uncut areas of grass too much weight on...

Page 35: ...connection i e filler plug Avoid quick release couplings Operating the Debris blower The fan is suitable for clearing cuttings off the highway we recommend the blower is used on final cut only and no...

Page 36: ...ment slot Setup for grass cutting uses small stops in either position with the option of an Additional stop at the top of the adjustment slot Hydraulic rear roller control switch Positions depend on m...

Page 37: ...er is in contact with the ground If the machine is going to be used for long periods of time at hedge cutting it is recommended to remove the Autopilot assembly between the dipper arm and head and rep...

Page 38: ...on the rotor switch the rotor should not spin and turn on the autopilot The arm should rise if the arm head was fully lowered or drop if the rear roller is off the ground and the 2 switch arms should...

Page 39: ...crease sensitivity by moving the cam peaks together reduce auto pilot sensitivity by moving them apart We recommend the cam plates are flush at the top as shown Ensure the switch lever closes the cont...

Page 40: ...adjacent cam Move cams apart to increase amount of weight carried on the rear roller there by reducing the sensitivity of the auto pilot If the cams are to close together the switches will constantly...

Page 41: ...ssary to temporarily lift with the main ram using hydraulic joystick and the red isolator button If you approach larger areas not to be mown i e road junction bridges and crash barriers it will be nec...

Page 42: ...he PTO engaged Before leaving the tractor cab always ensure that the saw head is firmly on the ground no weight is on the tractors hydraulics and blades have stopped spinning Always check that all gua...

Page 43: ...he Quad saw The blades must be mounted in a downward cut rotation Fig 1 Always use the blades vertically positioned in relation to the direction of travel Fig 2 The hydraulic hoses must be connected c...

Page 44: ...or debris jamming the saw blades stop the machine immediately and clear the blockage with a suitable tool Ensure there is a skid mounted on the bottom of the saw attachment to protect the lowest blade...

Page 45: ...reach as required Over frequent use of telescopic arm will cause premature wear of adjustable pads Transport of the Telescopic arm Always fully retract before folding machine arms into transport posit...

Page 46: ...rocker switch opposite the head will retract backwards When operating the cutting head close to the tractor extreme care must be taken to avoid contact with the cab Transport of the Variable forward...

Page 47: ...Lubrication Points All the following grease points need to be greased daily Spearhead Excel Highway machine Optional Quad saw Head Rotor Roller Grease 1 2m head every 8 hours 5 10 pumps Optional Autop...

Page 48: ...e grease failure to do this will result in serious damage to the gearbox Grease both U J joints every 8 hours Motor Drive Direct Drive Motor drive splines are lubricated via the rotor bearings and sho...

Page 49: ...wisting during fitting use two spanners to slacken and tighten Always check the yellow protective sleeving is in good order replacing sleeving is far cheaper than replacing expensive hoses Hose warran...

Page 50: ...nd do not over tighten If a fitting persists in leaking it will need to be replaced Oil Recommendations Filtration maintenance The machine is protected by a suction strainer and a low pressure full fl...

Page 51: ...are showing severe wear damage or cracking they must be replaced immediately Never attempt to weld the flails as this will make them very brittle and extremely dangerous Do not take risks with the cut...

Page 52: ...amage to paint Grease all grease points until fresh grease shows Slacken rotor drive belts where fitted It is important where possible to store undercover to protect against rain and sunlight Always e...

Page 53: ...ng 49 X Flail bolts are fully tightened 51 X Flail head retaining bolts are fully tightened 53 X Gearbox seals If oil is leaking replace immediately X X Inspect leaks from fittings and pipes 49 X Pins...

Page 54: ...Trouble shooting Excel Highway In the event of your machine not functioning correctly you will need to Identify the type of failure Spearhead Excel 606 686 726 836 54...

Page 55: ...or vibration Rotor bearing failure Wire string in bearing Remove wire string Lack of maintenance Grease bearings to schedule Water in bearing Expel water with grease Flails broken or missing Replace f...

Page 56: ...retighten the line Spool contacting with housing Check spool is free moving Irregular arm movement Broken spring in spool valve Check spring Failed ram seals Repair ram Faulty wiring Check wiring and...

Page 57: ...s to the arms via your controls or bumps in the ground as pressure spikes will by transmitted back to the pump resulting in failure Avoid striking the rotor on obstacles i e road gullies as this cause...

Page 58: ...e system is completely clean Ensure check valve 0 5 bar is installed the correct way between motor and drain hose to allow excess oil out Spearhead Fill casing of pump with oil to protect internal com...

Page 59: ...to help the filling Turn on the system for a few moments at a minimum speed Check the tank oil level Gradually increase the pressure and speed of rotation up to the pre set operating level Monitor the...

Page 60: ...Hydraulic Diagram Spearhead B Black W White T Turquoise S Slate R Red O Orange U Blue N Brown K Pink Y Yellow G Green P Purple Excel 606 686 726 836 60...

Page 61: ...Ram 11 Dipper Ram 12 Head Ram 13 Motor 14 Motor Valve 15 Tank 16 Check Valve 17 Angle Float 18 Returns Filter 19 Restrictor 1mm 20 Restrictor 1 5mm 21 Restrictor 2mm 23 Oil cooler 24 Hydraulic Roller...

Page 62: ...Notes Spearhead Excel 606 686 726 836 62...

Page 63: ...here is a manufacturing or material defect or the cost of normal servicing items such as oils and lubricants 5 This warranty does not cover any expenses or losses incurred whilst the machinery is out...

Page 64: ...ice Report form must have been completed and stamped by the servicing dealer or Spearhead Service Engineer and sent to Spearhead within 14 days after the first annual service 3 The extended warranty d...

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