Etesia HYDRO 124D Скачать руководство пользователя страница 25 | Manualshive

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2.2.2) The pressure limiting devices

General points

The pressure limiting devices are controlled by the pressure in the circuit. When the
maximum pressure predetermined by the valve loading is reached, the flow from the pump is
directed towards another 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 to the tandem pump.
One  for  the  circuit  supplied  by  the  4cc  pump  (equipment  circuit)  which  is  integrated  in  the
ORBITROL.
The other for the circuit supplied by the 16cc pump (PTO circuit) and which is mounted  on the
control valve at the front of the machine.

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Содержание HYDRO 124D

Страница 1: ......

Страница 2: ...2...

Страница 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...

Страница 4: ...4 GRASSBOX...

Страница 5: ...5...

Страница 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...

Страница 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...

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

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

Страница 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...

Страница 11: ...11 ENGINE HOT...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 17: ...17...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 48: ...48 OIL RETURN FILTER H124D...

Страница 49: ...49 EQUIPMENT CIRCUIT HYDRAULIC DIAGRAM EQUIPMENT CIRCUIT HYDRAULIC DIAGRAM EQUIPMENT CIRCUIT HYDRAULIC DIAGRAM EQUIPMENT CIRCUIT HYDRAULIC DIAGRAM...

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

Страница 51: ...51...

Страница 52: ...52...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 71: ...71...

Страница 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...

Страница 73: ...73...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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