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Etesia HYDRO 124D, Technical Training Manual

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Etesia HYDRO 124D Technical Training Manual Download Page 12

- 12 - 

 

 

FUEL SUPPLY SYSTEM. 

 

 

 
NB : The rotational speed of the camshaft is half the rotational speed of the crankshaft, in other words of 
the engine speed, as the camshaft works on a full engine cycle  
( 1 engine cycle = 4 engine strokes = 2 crankshaft rotations).

 

 

Stroke  

Inlet 

Compression 

Explosion  

Exhaust 

Piston movement 

Down 

Up 

Down 

Up 

Crankshaft 

(per 

½ 

rotation) 

½ rotation 

2/2 rotations 

3/2 rotations 

4/2 rotations 

Crankshaft (per rotation)  1

st

 rotation 

2nd rotation 

Inlet valve 

Open 

Closed 

Outlet valve 

Closed 

Open 

Camshaft (per rotation) 

1 rotation 

Summary of Contents for HYDRO 124D

Page 1: ......

Page 2: ...2...

Page 3: ...g radius outer front wheel 2 5 m Radius of non mown surface 1 25 m Pendular axle 4 5 clearance Tyres 16 x 7 5 4 ply 1 2 bar front and rear NB the tyre pressure is the pressure exerted on the ground th...

Page 4: ...4 GRASSBOX...

Page 5: ...5...

Page 6: ...ting Centrifugal speed regulator Cast iron monobloc cylinder housing Aluminium cylinder head Reborable cylinders 2 Accessibility to the parts for control cleaning and replacement FOCS technology the e...

Page 7: ...ximum torque at 2000 rpm 53 5 N m Operating speed 2850 Rpm Idling speed minimum 1200 Rpm Oil sump capacity With filter 2 4 without filter 2 3 Litre Weight empty 85 kg ALTERNATOR The alternator is plac...

Page 8: ...8 POWER CURVES CONSUMPTION TORQUE LUBRICATION...

Page 9: ...9 AIR SUPPLY CIRCUIT COMBUSTION AIR FILTER...

Page 10: ...COOLING SYSTEM A thermostatic valve allows the engine to come up to its operating temperature more rapidly from cold starting hence 2 possible routes of the coolant main and by pass circuits Engine c...

Page 11: ...11 ENGINE HOT...

Page 12: ...rks on a full engine cycle 1 engine cycle 4 engine strokes 2 crankshaft rotations Stroke Inlet Compression Explosion Exhaust Piston movement Down Up Down Up Crankshaft per rotation rotation 2 2 rotati...

Page 13: ...on pump valve blocked Injector badly calibrated Significant leak at plunger injector Rack link rod of injection pumps difficult to manoeuvre SUPPLY CIRCUIT Injection pump incorrectly adjusted Oil leve...

Page 14: ...ck the solenoid on the diesel filter is powered Check the diesel prefilter is clean Check the air filter is clean Check circuit is sealed leakage and air intake Purge circuit Check the battery is in g...

Page 15: ...t and outlet 0 20mm between rocker arm and valve Tightening of the cylinder head Check the length of the screws before using them Length of new screws 89 5 to 90 5 mm Max length of screws 92 mm 1st ph...

Page 16: ...cker cover 8 Nm Rack fixing screw 1 1 to 1 3 Nm Fuel manifold fixing screw 3 5 to 4 Nm Timing belt tension 20 Nm Timing belt tension idler pulley nut 40 Nm ENGINE OIL PRESSURE Between 4 5 and 5 5 bars...

Page 17: ...17...

Page 18: ...devices 2 2 3 Flow limiters 2 2 4 Safety valves parachute valve 2 3 Receivers 2 3 1 Rams 2 3 2 Hydraulic steering ORBITROL 2 4 Performances 3 The drive transmission circuit Introduction 3 1 Power unit...

Page 19: ...neral points General points ENERGY CONVEYOR oils ENERGY TRANSFORMATION Power units pumps Receivers Ram motor HYDRAULIC SYSTEM CONTROL Control valves Flow limiter Pressure limiting device ENERGY TRANSF...

Page 20: ...o a tank 1 by a power unit pump 2 delivered to a receiver ram 3 then returned to the tank 2 1 Power unit 2 1 1 General points The hydraulic pumps transform mechanical energy into hydraulic energy NB T...

Page 21: ...ifier sweeper are connected The other with a cubic capacity of 4cc is reserved for all the other hydraulic functions of the machine except the drive namely the assisted steering the lifting of the gra...

Page 22: ...racterised by O P O number of openings P number of positions In our case we use only two types of control valve in the equipment circuit 4 3 Control valve Centre closed Start closed Cross parallel wit...

Page 23: ...losing 3 Control valve 4 which is of the 2 2 type does not control any particular function and yet it plays an essential role It is activated at the same time as one of the 3 functions mentioned above...

Page 24: ...hind the coupling plates at the front of the machine It controls the functions of the front parts of the machine namely Accessory holder triangle up down 1 Control of ram mounted on the accessory depe...

Page 25: ...er use or to the tank The role of this component is to protect the hydraulic components against the risks due to overloading Symbols Applied to a circuit We have two pressure limiting devices linked t...

Page 26: ...ints The flow limiters serve to check the speed of the receivers They are throttles that reduce the section through which the hydraulic fluid passes The excess flow is evacuated to the tank by means o...

Page 27: ...rge chambers is obliged to pass through the flow limiter The flow is then limited to 3 5 l min The aim of limiting the flow is to equalise the time taken to lift and lower the grassbox but also to pre...

Page 28: ...is rams and the ORBITROL 2 3 1 The Rams They transform hydraulic energy into linear mechanical energy straight movement Diagram DESCRIPTION 1 Large chamber 2 Small chamber 3 Piston 4 Rod 5 Inlet ports...

Page 29: ...e position of the steering ram is obtained from an ORBIT type metering hydraulic motor This is why this element is also called an ORBITROL Diagram We can see on this diagram that a pressure limiting d...

Page 30: ...ulic motor 2 There is no communication between the power branches and the tank Diagram 3 1 Power unit Axial piston pump The movement of the piston from the top to the bottom point increases the volume...

Page 31: ...al leakage All power units or hydraulic receivers have a normal degree of leakage which varies according to the mechanical clearance the pressure and the viscosity of the oil We can distinguish two ty...

Page 32: ...operation as soon as a wheel is blocked all the oil is directed to the free wheel this wheel then skids By activating the flow divider we force the flow to separate into equal parts to supply the whe...

Page 33: ...rain to evacuate the external leakage Because of the way it is built the internal pinion must turn 6 times for one turn of the wheel This reduction leads to Slow rotation of the wheel A high torque In...

Page 34: ...in bars This formula can also allow the calculation of a pressure according to a power and a flow It is presented in the following form PRESSURE 600 x POWER FLOW TORQUE TORQUE 950 x POWER ROTATIONAL...

Page 35: ...latter is full It is therefore this function that imposes the maximum necessary power that the 4cc pump must provide A grassbox full of grass weighs approximately 200kg For each ram that represents 72...

Page 36: ...hydraulic coupling on the coupling plate Method Connect a manometer that allows the reading of pressures up to 150 bars minimum onto one of the large male hydraulic couplings Activate the accessory ra...

Page 37: ...on pump that is 29 litres minute this means about 3 litres minute per motor return to the tank In total the leakage is estimated at 2 4 3 3 8 4 litres minute that is 14 of the 58 litres minute Such a...

Page 38: ...ntrol part seized blocked or disconnected pedals push pull cable pump control lever that there are no oil sump leaks on the pump or on a wheel motor that the external leakage is within the values allo...

Page 39: ...6 47 48 49 50 51 52 53 54 1000 1500 2000 2500 3000 3500 4000 Diesel engine rate Wheel motor torque Effect of an increase in engine speed on the torque output of the wheel motors The torque is reduced...

Page 40: ...amshaft PTO Moreover we have seen the characteristic curves for the FOCS engine in the engine chapter An increase in the speed above the max speed set in the factory leads to a negligible gain in powe...

Page 41: ...er cartridges Internal oxidation of the components Water in the hydraulic circuit is often due to the variations in temperatures in the tank above the level of the oil when a hot tank is moved into a...

Page 42: ...24 D The hydraulic oil recommended for the Hydro 124D is of the HV 46 type 46 is the viscosity value in centistokes or cSt at 40 C At 100 C the viscosity is 8 cSt Using a chart we can determine the fo...

Page 43: ...43 Mounting a flexible hose INCORRECT CORRECT Too much tension on the connectors Curves too small Too many curves...

Page 44: ...more and more efficient with higher yield rates whilst reducing the internal clearances to limit leakage internal and external These components also represent relatively high costs The application of...

Page 45: ...ealer tape Teflon etc are almost always original pollution from when the equipment was made This type of pollution can also come from various topping up and oil change operations carried out in inadeq...

Page 46: ...articles but also fluid gels paraffin and other additives that are products of oil refining It also concerns salts and metallic oxides As well as the abrasive paste effect the micronic particles have...

Page 47: ...which have penetrated the components due to poor storage orifices not closed component oil sumps containing no oil and an absence of depollution on commissioning passage of a fluid filtered at 10 m th...

Page 48: ...48 OIL RETURN FILTER H124D...

Page 49: ...49 EQUIPMENT CIRCUIT HYDRAULIC DIAGRAM EQUIPMENT CIRCUIT HYDRAULIC DIAGRAM EQUIPMENT CIRCUIT HYDRAULIC DIAGRAM EQUIPMENT CIRCUIT HYDRAULIC DIAGRAM...

Page 50: ...50 DRIVE TRANSMISSION CIRCUIT HYDRAULIC DIAGRAM...

Page 51: ...51...

Page 52: ...52...

Page 53: ...of the grassbox the opening or the closing of the grassbox the starting of the revolving warning light It also controls the monitors on the steering console It is protected by the 15A fuse The main en...

Page 54: ...Wear of the cables of a switch contactor coming into contact with each other THE ELECTRICAL HARNESSES There are 5 harnesses which group together all the cables of the Hydro 124D thus allowing the com...

Page 55: ...g Under the engine cover between the fan and the engine informs of the position at dead centre Cutting height adjustment new cutting heights Plunger 1 Opening Under the engine cover above the electro...

Page 56: ...neutral point On the Hydro 124D these are cutting deck down neutral cutting deck up left indicators neutral right indicators lights neutral lights revolving warning light b The positions can be with...

Page 57: ...ard warning lights on Hazard warning lights off dipped headlights on dipped headlights off b automatic return positions differential lock on differential lock off The ignition switch Allows the engine...

Page 58: ...ttention of the operator to a status or warns of a danger There are two audible warnings on the Hydro124D 1 in the steering column connected in parallel to the engine temperature monitor If the engine...

Page 59: ...sition slide will only require one coil the resting position being obtained with a spring OPERATION OF THE HYDRO 124D Although the most of the functions are driven by the hydraulics by the control val...

Page 60: ...tactor closed electromagnetic clutch switch open parking brake contactor closed or seat contactor closed In other words the electric module awaits this information to authorise the starting of the eng...

Page 61: ...ng Or Operator leaves the seat And cutting system in operation or PTO engaged From the point of view of the contactors and switches Dead centre contactor open And parking brake contactor closed or rem...

Page 62: ...And Mobile grassbox is closed And Mobile part s of frame mounted From the point of view of the contactors Seat contactor closed Fixed grassbox contactor closed Mobile grassbox contactor closed Mobile...

Page 63: ...g The operator presses on the mobile basket opening switch 1 Then the flap starts to move up 2 if the flap is no longer in the horizontal position 3 Then the revolving warning light is activated The f...

Page 64: ...t revolving warning light live flap closing coil live basket opening coil live blade clutch stop Input mobile basket opening switch open Closing Input mobile basket closing switch closed 1 Output flap...

Page 65: ...t The operator releases the basket opening switch at the desired position Closing Input the operator presses on the switch de closing du basket 1 Then the flap is brought to the vertical position or i...

Page 66: ...ning switch closed 1 Output flap closing coil live basket opening coil live Input basket opening switch open Closing Input basket closing switch closed 1 Output flap closing coil live 2 Input flap ver...

Page 67: ...is working properly See if the engine is not blocked Turn the engine over a quarter of a turn and try the starter again 2 ENGINE DOES NOT START Starter working Check the fuses are in good condition Ch...

Page 68: ...g brake is not on Check the correct position of the side casings if they activate the position contactors Check the connections between the main bundle and the frame bundle are in good condition Check...

Page 69: ...o big it must be adjusted immediately 10 DURING MOWING The cutting system stops after a while Check the clearance of the blade clutch gap If it is too more than the recommended adjustment value it mus...

Page 70: ...of the basket Check that there is no obstacle preventing the movement of the basket Check that the slide coil concerned is powered in 12V The mechanical functioning of the slide associated with the f...

Page 71: ...71...

Page 72: ...h Each time dismantled Rubber coupling With a brush Each time dismantled Shell Alvania G2 Blade coupling With a brush Molykote CU 7439 plus Roller supports With a brush Each time dismantled Molykote C...

Page 73: ...73...

Page 74: ...al circuit Correct operation of safety devices C H E C K S Transmission Correct operation of safety devices Engine air filter r Engine cover grilles Several times during each use Radiator protection g...

Page 75: ...ping during rotation of the electromagnetic clutch 7 seconds max correct the clearance if necessary 4 Steering wheels Check the ball joints are tight Check the tyre pressure front 1 2 bar rear 1 2 bar...

Page 76: ...LTER DIESEL TANK PARTIAL SERVICE 3 GENERAL SERVICE 4 1 First replacement at 50 hours 2 Every 2 years or every 1000 hours 3 Replacement of timing belt valve and housing run in lost spaces between cylin...

Page 77: ...eft screw adjustment of X in retracted position Right screw adjustment of X in out position Turn the screw to the left X increases Turn the screw to the right X diminishes Cutting height max X 40 mm C...

Page 78: ...he ground 2 Front rear tilt To change the tilt of the cutting deck use the threaded rods rep 2 These rods have right handed and left handed threading If the rod is turned in one or other direction the...

Page 79: ...ists of positioning the pump distribution plate on the displacement nil position no flow on the A B outlets of the pump The adjustment is made using the maintaining eccentric 1 of the dead centre spri...

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