Stiga 2021 Edition PARK 320 P Workshop Manual Download Page 85

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WORKSHOP MANUAL

PARK

Chapter

8 - HYDRAULIC SYSTEM

EDITION

2020

PAGE

85 /

124

8.1 GENERAL INFORMATION

8.1.1 Description

Park machines with a two or four-wheel drive are equipped with a hydraulic transmission system,

consisting of an internal combustion engine that drives an hydraulic pump; the pump sends the

oil under pressure to the rear axle hydraulic motor (2WD models) and to the front axle hydraulic

motor (4WD models).

In the 4WD models, the front and rear units are connected in series, which means that the front

and rear wheel motors rotate at the same speed; to facilitate steering, both axles are equipped

with a differential.

All machines are equipped with an hydraulic steering valve (Booster) connected to the rear trans-

mission.

Summary

8.1 GENERAL INFORMATION ............................................................... 85

8.1.1 Description ................................................................................. 85

8.1.2 Safety criteria in the maintenance of the hydraulic system .......... 86

8.1.3 Diagram of hydraulic connections .............................................. 86

8.1.4 Configurations ............................................................................ 87

8.2 OPERATION OF THE HYDRAULIC SYSTEM ................................... 88

8.2.1 Components description and functioning ................................... 88

8.2.2 By-pass valves ........................................................................... 91

8.2.3 Hydraulic steering valve (Booster) .............................................. 91

8.2.4 Troubleshooting of the hydraulic system ..................................... 92

8.2.5 Troubleshooting of the hydraulic steering valve .......................... 93

8.3 MAINTENANCE OF THE HYDRAULIC SYSTEM ............................. 94

8.3.1 Rear transmission unit filter replacement .................................... 94

8.3.2 System emptying and filling ........................................................ 95

8.4 DYNAMIC BALANCING VALVE (Smart by-pass) .......................... 97

8.4.1 Description ................................................................................. 97

8.4.2 Valve disassembly ...................................................................... 98

8.4.3 Valve calibration ......................................................................... 98

HYDRAULIC DIAGRAMS ................................................................ 100

.1 Park 4WD ................................................................................. 100

.2 Park 2WD ................................................................................. 101

8 - HYDRAULIC SYSTEM

Summary of Contents for 2021 Edition PARK 320 P

Page 1: ...PARK 2021 WORKSHOP MANUAL...

Page 2: ...with the required expertise to perform and use the correct equipment all the opera tions described with the objective of safeguarding machine performance and safety The Manufacturer is under no circum...

Page 3: ...2 Structure of the Manual The manual is divided into chapters paragraphs and sub paragraphs The front inside cover provides the table of contents indicating the various chapters Each chapter is dedic...

Page 4: ...ollowed by the number of the rel evant chapter paragraph or sub paragraph b Safety terminology and notes Some paragraphs are preceded by a definition that highlights their importance NOTE General refe...

Page 5: ...k surface with all the fixing bolts arranged in their order of disassembly Organisation is a key element for correct reassembly The required utensils tools and compo nents must be gathered before star...

Page 6: ...dge and familiarisation of the accompanying documentation on the part of the user Carelessness Incorrect or prohibited use or assembly Use of non genuine spare parts Use of accessories not supplied or...

Page 7: ...tion of the problem and the implementation of corrective action at production level Similarly the Manufacturer will report any faults discovered on the machines produced with rec ommendations for the...

Page 8: ...INE PREPARATION AND DELIVERY 9 2 2 1 Preliminary procedures 9 2 2 2 Tyre pressure check 10 2 2 3 Battery 10 2 2 4 Axial steering allowance adjustment 11 2 2 5 Final operations 11 2 3 TRANSPORTATION AN...

Page 9: ...e Manufacturer Each transmission unit has a label 1 front if present and 2 back with a serial number that clearly identifies the product and its spec ifications this number must always be quoted when...

Page 10: ...hard tyre has less flexibility to deteriorate self cleaning characteristics 2 2 3 Battery NOTE This machine uses a hermetic recombination battery in which the electrolyte of each ele ment is carefully...

Page 11: ...lied 2 2 5 Final operations Removal from the pallet All the operations described above must be carried out with the machine fixed to the transport pallet at this point free the machine from the fixing...

Page 12: ...he machine with the equipment if present in the Transport position making sure not to hit the ramps while climbing Use ramps of adequate strength and length for the means of transport on which the mac...

Page 13: ...t acts under the front transmis sion assembly Stabilize the machine with two stands placed in corre spondence of load bearing elements of the front part of the frame Park 2WD machines Place a wooden b...

Page 14: ...es with design material and processing character istics optimized for the use on the machine for which they were intended these characteristics are not found in so called compatible spare parts and ca...

Page 15: ...that the labels with instructions or provisions have not been removed or have become illegible these form an integral part of the safety system and also restore to proper working order any safety dev...

Page 16: ...ar transmission fixing nuts to frame 20 25 Nm 5 Motor fixing screws 35 50 Nm 6 Wheel hub screws 4WD only 20 25 Nm 7 Wheel fixing nuts 35 50 Nm 8 Clutch fixing screw 60 70 Nm 9 Steering chain pinion fi...

Page 17: ...he battery 9 3 1 Test of the charging system output Cleaning of the battery terminals Check of the wear of the front axle shafts and bushings 1 General lubrication 1 2 5 5 Check of the tyre pressure 2...

Page 18: ...air filter 2 Check of the spark plug Replacement of the spark plug 1 Change the oil every 25 hours if the engine runs at full load or at high temperatures 2 Clean the air filter more often if the mac...

Page 19: ...f the oil cooler tabs 1 1 Clean more often in dusty conditions or when airborne debris is present F Motore Honda GCV 530 See engine manual for running modes Intervention Type After 1 month or 20 hours...

Page 20: ...ion pedal hub General purpose grease 6 Lifting mechanism WD40 grease or equivalent Steering chain General purpose grease All lubrication points have to be lubricated every 25 hours of operation or at...

Page 21: ...on Action Result Operator seated Parking brake engaged Power Take Off deactivated Rotate the key in the start position The machine is turned on Machine switched on or in motion The operator gets up fr...

Page 22: ...n of the interventions see the chapters Wheels Transmission Brake 7 and Hydraulic system 8 of this manual d Belt transmissions Check the condition of all the belts and the efficiency of the tensioners...

Page 23: ...earings Check the condition and tension of the belts 6 Check that the lifting mechanism moves smoothly is not jammed has no backlashes and that it locks in the desired position Check that the blades a...

Page 24: ...f Torq KTM10M KTM10M Transmission Oil 5W 50 5W 50 5W 50 5W 50 Transmission oil change quantity litres 1 3 1 3 3 6 3 6 Spark plug or equivalent Champion QC12YC RC12YC Champion RN9YC Champion RN9YC BPR5...

Page 25: ...ission Oil 5W 50 5W 50 5W 50 5W 50 5W 50 Transmission oil change quantity litres 3 6 3 6 3 6 3 6 3 6 Spark plug or equivalent Champion QC12YC RC12YC Champion QC12YC RC12YC Champion RN9YC Champion RN9Y...

Page 26: ...WORKSHOP MANUAL PARK Chapter 2 INFORMATION FOR SERVICE CENTRES EDITION 2020 PAGE 26 124 2 6 2 Overall dimensions 992 5 1960 864 1236...

Page 27: ...1 1 Removing the rear hood 27 3 1 2 Removal of the front casing of the belts 28 3 1 3 Removal of the rear casings of the belts 29 3 1 4 Removing the casings of the steering column 31 3 1 5 Remove the...

Page 28: ...ttention to position the plastic washer 4 on the side of the support 3 3 1 2 Removal of the front casing of the belts NOTE The front casing 1 consists of two el ements connected together by a screw lo...

Page 29: ...NOTE The rear guards consist of three elements connected to each other a left casing 1 a right casing 2 which starting from the right side wraps the mechanism of the articulated joint and connects to...

Page 30: ...right casing 2 guiding the protruding front part around the central joint components When assembling repeat the steps described above in reverse order taking care of reposition the shim washer 8 betw...

Page 31: ...pin punch extract the elas tic pin 1 and remove the steering column 2 2 Unscrew the four screws 3 and remove the upper casing 4 3 Unscrew the four internal screws 5 and the front screw 6 which fix th...

Page 32: ...om the hooks 12 that secure it to the rear of the column 8 Cut the clamp 13 and disconnect the con nector 14 then remove the bumper 11 in cluding the front part of the column When assembling carry out...

Page 33: ...orking from the rear part of the casing 1 unscrew the three screws 2 located on the left side 2 Unscrew the four screws 3 on the right side 3 Working from the front unscrew the two up per screws 5 and...

Page 34: ...ine control levers and the electrical components When assembling perform the steps de scribed above in reverse order Park 3xx 1 Unscrew the two lower screws 1 2 Unscrew the three upper screws 1 3 Tilt...

Page 35: ...f the machine need to be separated Park 4WD Disassembly Loosen or remove both belts from the double pulley 6 3 2 6 3 3 Follow the photographic sequence of the im ages that depict the correct and neces...

Page 36: ...between the dou ble pulley 16 and the frame Reassembly Perform the steps described above in reverse order taking care of correctly reposition all the washers and spacers previously removed according...

Page 37: ...e pulley 6 3 2 6 3 3 Follow the photographic sequence of the images that depict the correct and necessary operat ing steps NOTE The images are upside down compared to the real situation 1 Remove the d...

Page 38: ...central screw 21 with a torque wrench set to 35 50 Nm 3 2 2 Separation of the two parts of the machine WARNING The operation of separating the front and rear parts of the machine is a particularly de...

Page 39: ...ted joint is 6 Park 4WD Empty the oil circuit 8 3 2 and disconnect the front transmission tubes 7 2 2 at point 6 7 Remove the pulleys of the articulated joint 3 2 1 8 Stabilize the rear part of the ma...

Page 40: ...ice NOTE This device allows the work equipment to be kept raised and acts when the lifting pedal is pressed and released with a first pressure on the pedal the equipment is raised and when released it...

Page 41: ...rear transmission pump which reduces the effort required for the operation as well as ensuring greater fluidity in driving and when changing direction Since the steering valve is operated by the oil c...

Page 42: ...noises The articulated joint is not lubri cated Grease the two lubricators on the central hub and the two lubricators on the tilting axis 2 5 5 The steering wheel has no mini mum axial backlash Remov...

Page 43: ...ew the two nuts 1 and 2 of the adjusters respectively of the right and left branches of the chain 3 remove the ter minals 4 from the two fixing brackets and release the right branch of the chain from...

Page 44: ...on the left branch ad juster and adjust the relative nut 2 so as to obtain a protrusion of the threaded section of 16 mm tighten the nuts 9 and 11 with a torque wrench set to 35 50 Nm IMPORTANT Tight...

Page 45: ...ling perform the steps described above in reverse order taking care to restore the adjusters 1 and 2 and the cor rect tension of the chain 4 2 1 check the centering of the yellow link of the chain wit...

Page 46: ...5 unscrew the four nuts 6 located under the footboard in cor respondence with the screws 7 and remove the steering column support 8 6 Completely loosen the two nuts 9 and 10 of the adjusters to remov...

Page 47: ...two elastic pins 17 with the help of a pin punch When assembling perform the steps described above in reverse order taking care to restore the adjusters 9 and 10 and the correct tension of the chain...

Page 48: ...om the power cable of the electromagnetic clutch 2 Summary 5 1 ENGINE 48 5 1 1 Clutch removal 48 5 1 2 Removal of the engine 49 5 1 3 Removal and replacement of the exhaust muffler 51 5 1 4 Replacemen...

Page 49: ...impact driver unscrew the central screw 8 and remove the electromagnetic clutch 9 from the crankshaft When assembling perform the steps described above in reverse order paying attention to cor rectly...

Page 50: ...a screwdriver and pour the petrol in the tube 7 into the container 4 Loosen the screws of the terminals 8 and 9 and disconnect the throttle 10 and choke 11 cables 5 Remove the clutch 5 1 1 6 Press the...

Page 51: ...ion without exchanging them or using cables of different engines Tighten the engine fixing screws 14 using a torque wrench set to 35 50 Nm 5 1 3 Removal and replacement of the exhaust muffler WARNING...

Page 52: ...ct the Z terminal of the cable 6 from the throttle lever 7 6 Unscrew the screw 8 and remove all the le ver assembly 7 and the pivot components When assembling perform the steps de scribed above in rev...

Page 53: ...efully pull the old cable which in this way guides the cable pulling probe all the way from the engine to the exit of the terminal 6 7 In the same way working from the dashboard side join the terminal...

Page 54: ...Working on the dashboard side join the dashboard side terminal of the old cable with the engine side terminal of the new ca ble using a sufficiently strong and reliable adhesive tape 6 Working on the...

Page 55: ...th the motor side terminal of the new cable us ing a sufficiently strong and reliable adhesive tape 8 Working on the engine side carefully pull the old cable which in this way guides the new cable all...

Page 56: ...lying tab 3 with the help of a screwdriver Screw the cap 1 back on to prevent dirt from entering the tank or acciden tal spills of petrol 2 Close the tap 4 3 Prepare a container and remove the clamp 5...

Page 57: ...rewdriver pull out the tap 10 and the cap 11 7 Clean the filter 12 thoroughly When assembling perform the steps described above in reverse order taking care to carefully restore the clamp 5 of the pet...

Page 58: ...belt useful when mak ing such decisions Example Belts available on the market Original spare belts Notes Adhesion on the pulley The belt rests with the sides inclined against the walls of the pul ley...

Page 59: ...nd beneath it and this means that the pulley is constantly moving To withstand extreme oper ating conditions the origi nal belts are made of fibre reinforced rubber Curvature in two directions Designe...

Page 60: ...m Overload Check the operating conditions Worn pulleys with the belt resting on the bottom Replace pulley Presence of oil Clean up any oil or grease residue 4 Belt screeching Loosening the belt Check...

Page 61: ...REPLACEMENT OF THE BELTS 6 3 1 Replacement of the engine transmission belt Ref A 1 Remove the electromagnetic clutch from the engine shaft 5 1 1 2 Press the brake pedal to loosen the belt 1 and be ab...

Page 62: ...eassemble the tightener 4 with the protrud ing part of the hub facing upwards 6 3 2 Replacement the engine articulated joint axis belt Ref B 1 Remove the left rear casing paying attention to the fact...

Page 63: ...7 5 Remove the double pulley 8 together with the belt 9 When assembling perform the steps described above in reverse order taking care to reassemble the spacer 10 with the stop facing upwards and to o...

Page 64: ...oss of the fastening points of the belt guide arch 2 Release the spring 1 to loosen the tight ener 2 3 Unscrew the nut 3 and remove the tight ener 2 to release the belt 4 from the re taining pin 5 4 R...

Page 65: ...ve in reverse order Park 2WD machines 1 Remove the belt between the engine and the axle of the articulated joint 6 3 2 from 1 to 3 2 Unscrew the central screw 1 that secures the double pulley 2 3 Remo...

Page 66: ...ISSION UNIT 70 7 2 1 General description 70 7 2 2 Removal of the rear transmission unit 70 7 3 FRONT TRANSMISSION UNIT Park 4WD only 73 7 3 1 General description 73 7 3 2 Removal of the front transmis...

Page 67: ...ng perform the steps described above in reverse order taking care to reposition the key 9 correctly and mount the hub 8 so that the outer flat part is 17 5 mm from the end of the shaft tighten the two...

Page 68: ...ub 7 together with the key 8 When assembling perform the steps de scribed above in reverse order taking care to reposition the key 8 correctly and mount the hub 7 so that the outer flat part is 65 mm...

Page 69: ...e inner cotter pin 8 and remove the inner shoulder washer 9 7 Remove the hub 10 together with the spacer 11 and the shim washers 12 When assembling perform the steps described above in reverse order t...

Page 70: ...he pulley mounted on the engine axle The speed modulation and direction of travel are controlled by the traction pedal the release of which produces a braking action capable of stopping the machine wi...

Page 71: ...lter cap 6 Only for Park 4WD Unscrew the two drain plugs 7 and 8 7 Disconnect all mechanical connections of the controls remove the crown fixer 9 and release the by pass control lever 10 with the leve...

Page 72: ...upper clamp 22 and disconnect the pipe fitting 23 connecting with the oil tank IMPORTANT The clamp 22 is of the CLIC type as it meets the safety criteria required for this application Therefore in cas...

Page 73: ...rque indicated in the Hydraulic connections diagram 8 1 3 check the correct adjustment of the parking brake spring 17 7 6 4 fill the oil 8 3 2 adjust the pedal stroke 7 5 2 7 3 FRONT TRANSMISSION UNIT...

Page 74: ...mission unit and drain all the oil by unscrewing the filter cap 1 Only for Park 4WD Unscrew the two drain plugs 2 and 3 4 Place a container under the front transmission unit and drain all the oil by u...

Page 75: ...for quick filling 15 unscrew the fitting 16 on the rear part of the transmission unit marking it appropri ately so as not to make mistakes during the assembly 16 Oil drainage pipe to the tank 7 Remove...

Page 76: ...erse order taking care to replace all the seals of the hydraulic fit tings tighten the nuts 18 to a torque of 20 25 Nm tighten the nuts 20 to a torque of 35 50 Nm tighten the hydraulic fittings to the...

Page 77: ...its applicator are not available use a normal hose clamp of suit able diameter 7 4 2 Disassembly of the oil tank Park 4WD machines 1 Place a container under the rear transmis sion unit and drain all...

Page 78: ...ar transmis sion unit and drain all the oil by unscrewing the filter cap 1 2 Unscrew the screws 4 that fix the support band 5 and remove the tank 6 3 Remove the hose clamp 7 and discon nect the hose 8...

Page 79: ...the exhaust muffler 5 1 3 2 Remove the left mudguard 1 fixed by the screws 2 and 3 3 Unscrew the nut 4 and disconnect the ball joint 5 of the cable 6 from the traction le ver 7 4 Cut the two clamps 8...

Page 80: ...e two ball joints 5 and 16 there fore before the assembly the two joints must be screwed to the two threaded ends of the cable leaving exposed a threaded section of 5 mm from the rear and placing the...

Page 81: ...limit screw 2 in forward way and a similar one 3 for reversing For the forward adjustment loosen the lock nut 4 and adjust the projection of the screw head 2 to a height of 19 mm To adjust in reverse...

Page 82: ...edal the purpose of which is exclusively to allow the insertion and release of the parking brake WARNING Finding higher values it is necessary to carefully check that the control cable does not have a...

Page 83: ...e pedal lever 3 3 Loosen the rear adjuster 4 and disconnect the Z terminal 5 of the wire from the gear lever 6 4 Remove the cable 7 NOTE The two ends of the cable are symmetrical and therefore can be...

Page 84: ...k lash of at least 5 10 mm If there is no backlash or the backlash should ex ceed the quoted value it is necessary to act ap propriately and in equal measure on adjusters 1 and 4 until the optimal con...

Page 85: ...hydraulic steering valve Booster connected to the rear trans mission Summary 8 1 GENERAL INFORMATION 85 8 1 1 Description 85 8 1 2 Safety criteria in the maintenance of the hydraulic system 86 8 1 3...

Page 86: ...ination compromise the operation and reliability of the system Always protect and close the openings of hoses fittings and any other component when disas sembling 8 1 3 Diagram of hydraulic connection...

Page 87: ...345 PWX Rear transmission Tuff Torq K57V K57V K574T K574T Front transmission Tuff Torq KTM10M KTM10M Transmission Oil 5W 50 5W 50 5W 50 5W 50 Transmission oil change quantity litres 1 3 1 3 3 6 3 6 M...

Page 88: ...controlled by the speed pedal 10 mechanically connected to the main pump 1b in the rear axle 1 The main pump pressure de pends on the power required from the wheel axles and is limited by the engine p...

Page 89: ...pump 35 45 bar 1b Main pump 1c Pressure limiter of the loading pump 1d Oil filter 1e Rear hydraulic motor 2 Oil tank 3 Connection with the hydraulic steering valve 4 Rear by pass valve 5 Front axle 5...

Page 90: ...operation Legend components 1 Rear axle 1a Loading pump 35 45 bar 1b Main pump 1c Pressure limiter of the loading pump 1d Oil filter 1e Rear hydraulic motor 2 Oil tank 3 Connection with the hydraulic...

Page 91: ...y pass valve 1 closed and the front by pass valve 2 open causes a powerful flow of oil into the front transmis sion casing Because the drain line is not sized for this flow and the main flow line is c...

Page 92: ...ve 3 comes into operation a pressure drop is generated down stream of the steering valve 5 which amplifies the torque applied to the steering wheel The pressure drop depends on the effort required and...

Page 93: ...oose or broken speed control cable Adjust or replace the cable 8 2 5 Troubleshooting of the hydraulic steering valve A prerequisite for the steering valve function is the backlash in the steering whic...

Page 94: ...cools down completely NOTEThe oil must be drained with the by pass open and the cap of the oil tank unscrewed 1 Place a container under the rear transmission unit and drain all the oil by unscrewing t...

Page 95: ...g the quick coupling 8 3 2 8 3 2 System emptying and filling NOTEDraining the oil is facilitated if it is carried out before it cools down completely NOTE The oil must be drained with the by pass open...

Page 96: ...1 4 7 When the oil has stopped dripping screw the filter cap 3 and all the caps previously un screwed 4 5 6 7 again always taking care of replacing the caps if the seals are dam aged 8 Connect the hos...

Page 97: ...he oil level and top up from the cap 1 of the tank 2 whenever it s necessary to restore the level 13 Check that there are no leaks from the drain plugs 8 4 DYNAMIC BALANCING VALVE Smart by pass 8 4 1...

Page 98: ...The dynamic balancing valve has a standard setting of 0 15 mm this value can be adjusted in the range 0 05 mm with respect to the standard calibration With the dynamic balancing valve set at 0 10 mm...

Page 99: ...ll turn the screw 5 until the desired gap is obtained under the slide 6 measured with a feeler gauge 3 Screw the internal valve 2 back into the valve body 1 until the end When assembling tighten the h...

Page 100: ...ents legend 1 Rear transmission unit 1a Loading pump 35 45 bar 1b Pump 1c Safety valve 1d Filter 1e Rear motor 1f Load limiting valve 2 Oil tank 3 By pass 4 Steering valve Booster 5 Front motor 6 Dyna...

Page 101: ...Park 2WD Components legend 1 Rear transmission unit 1a Loading pump 35 45 bar 1b Pump 1c Safety valve 1d Filter 1e Rear motor 1f Load limiting valve 2 Oil tank 3 By pass 4 Steering valve Booster a Dir...

Page 102: ...GENERAL INFORMATION 102 9 1 1 Introductory note 102 9 1 2 Safety regulations 103 9 1 3 Equipment 103 9 1 4 Electrical measure gauges 104 9 1 5 Electrical measurements 105 9 2 TROUBLESHOOTING 105 9 2...

Page 103: ...ately or as a combined tool Used to strip insulation from wires of various sizes crimp terminals and connector or wires Soldering iron and soldering gun Used to well all the couplings and connections...

Page 104: ...all change functions and ranges with switches or by plugging test leads into different jacks Multimeters are available in two basic types Analog and Digital Analog meters Analog meters have a needle t...

Page 105: ...d battery and requires no electrical power Using the ohmmeter on a circuit that has voltage applied may result in damage to the meter IMPORTANT Disconnect the battery from the machine when performing...

Page 106: ...lure you can hear the click Replace the starter motor 3 The starter motor runs but the engine does not start Lack of fuel supply Check the wiring of the carburetor solenoid valve opening command Check...

Page 107: ...Check all the wiring Engine running consent is miss ing Having made sure that the consent conditions are respected check all the microswitches and the relative wiring 2 5 6 9 3 10 Uncertain or missin...

Page 108: ...fferent composition of the hold down bracket 3 Connect the positive cable first 2 then the negative cable 1 4 Apply petroleum jelly or dielectric grease to battery cable ends and terminals b Inspectio...

Page 109: ...be estimated as indicated in the table of examples If you use a 12 volt automatic battery charger select a good quality charger with minimum 5 10 Ampere output at 15 VDC and charge depending on the ba...

Page 110: ...he booster bat tery 4 Connect one end of the second jumper cable to the negative terminal of the booster battery 5 Make the final jumper cable connection to the engine block or the furthest ground poi...

Page 111: ...6 1 2 3 4 5 6 1 2 3 4 5 1 2 1 2 1 2 G L A1 S A2 M B G L A1 S A2 M B 3 2 0 4 5 0 Pressed forward 1 2 G L A1 S A2 M B G L A1 S A2 M B G L A1 S A2 M B 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 1 2 1 2 1 2...

Page 112: ...des of the switch 3 3 Remove the switch 3 9 3 4 Replacement of the starter block 1 Unscrew the nut 1 2 Remove the starter block 2 and disconnect the connectors 3 making sure to mark them so as not to...

Page 113: ...Unscrew the two screws 1 5 Extract the socket 2 and disconnect the two fastons 9 3 7 Starter solenoid The starter relay operates on the principle that passing a current of electricity through a coil...

Page 114: ...the starter motor turn the ignition switch to the start position and listen for the solenoid to snap inside contacts closed If no snap is heard check across the coils with a voltmeter The voltage shou...

Page 115: ...engine Park 3xx 1 Remove the two covers under the seat 3 1 5 2 Extract the relays 1 located inside the cov ers 2 NOTE The relays 6 can be two or three de pending on the type of engine IMPORTANT The re...

Page 116: ...e coil the core is magnetized and pulls down on a magnetic lever The lever in turn is attached to several switch contacts which open or close other electrical circuits In this fashion a small current...

Page 117: ...her conducts current and is therefore functioning or the device is open and is therefore faulty Use an ohmmeter to check for continuity The fuses are placed in a container located near the battery und...

Page 118: ...A fuse blown Low coil resistance Replace the clutch Faulty battery Replace the battery Faulty charging system Repair or replace Faulty wiring or connections of the PTO switch Check repair or replace...

Page 119: ...e the clutch 4 Symptom Clutch noise and vibrations The plate hits against the anti rotational bracket A little bit of noise is normal If the noise is excessive repair or replace the anti rotational de...

Page 120: ...ed proceed as indicated below 1 Turn off the engine and the PTO switch 2 Disconnect the clutch from the clutch connector 3 Set the tester to the Ohmmeter function 4 Connect the tester probes to the cl...

Page 121: ...the flying connector 1 located inside 3 Connect the Bluetooth module 2 to the con nector 1 4 Fasten the Bluetooth module 2 to the wiring harness using a clamp 3 5 Check the connection as indicated in...

Page 122: ...A fuse 13 PTO relay 14 Safety relay 16 Electromagnetic clutch 17 Lifting actuator 18 Auxiliary attachments socket 19 Central light 20 Bluetooth module Components 1 Engine a Charging regulator b Starte...

Page 123: ...netic clutch 17 Lifting actuator 18 Auxiliary attachments socket 19 Central light 20 Bluetooth module Components 1 Engine a Charging regulator b Starter motor c Fuel solenoid valve d Ignition e Engine...

Page 124: ...STIGA S p A Via del Lavoro 6 31033 Castelfranco Veneto TV Italy www stiga com...

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