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Global garden products WBE 0701 Workshop Manual

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WBE 0701 - WBE 0702
WBE 0701 - WBE 0702
WBE 0704
WBE 0704
WORKSHOP
MANUAL
Rel. 0.1
2009
PRODUCTION YEAR
T
he manufacTurer reserves The ri ghT To make all The necessary Techni cal or commerci al i mprovemenTs To
,
.
iTs producTs
so There may be some differences beTween The series of engines and The conTenTs of This manual
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.
owever The basic specificaTions and differenT operaTing procedures wi ll remai n The same
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global garden producTs n
,
by
o use of The illusTraTions or duplicaTion
reproducTi on or
,
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TranslaTion
even parTial
of The TexTs in This documenT may be made wi ThouT expliciT auThori zaTi on
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ll brands
names
logos and Trademarks menTioned belong To Their respecTive owners

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Summary of Contents for Global garden products WBE 0701

  • Page 1 WBE 0701 - WBE 0702 WBE 0701 - WBE 0702 WBE 0704 WBE 0704 WORKSHOP MANUAL Rel. 0.1 2009 PRODUCTION YEAR he manufacTurer reserves The ri ghT To make all The necessary Techni cal or commerci al i mprovemenTs To...

  • Page 2: Table Of Contents

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 CONTENTS INTRODUCTION ..................... 6 1. RULES AND PROCEDURES FOR SERVICE CENTRES .......... 7 1.1. Guarantee validity ...........................7 1.2. Service repairs after guarantee period ....................7 1.3. Fault notification ............................7 1.4. Spare parts request ..........................7 2.
  • Page 3 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDICE 8. INTAKE SYSTEM ....................23 8.1. Maintenance of filtering element ( paper) ..................23 8.1a. Maintenance of filtering element ( sponge) ..................25 9. CARBURATION ....................26 9.1. Removing and cleaning the carburettor .....................26 9.2. Sostituzione del carburatore .........................29 9.3. Adjusting minimum speed ........................29 9.4.
  • Page 4 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDICE 15. ENGINE BLOCK - Overhauling internal parts ..........50 15.1. Removing the engine ( from the lawnmower) ................50 15.1a.Removing the engine ( from the tractor) ..................50 15.2. Carter opening ............................51 15.3. Dismantling and checking the camshaft and counterweight governor ..........52 15.4.

  • Page 5: Introduction

    WBE 0701, WBE 0702 and WBE 0704. Interventions on the engine must be performed in accordance with instructions in the following pages Warns of operations that should be carried...

  • Page 6: Rules And Procedures For Service Centres

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 1. RULES AND PROCEDURES FOR SERVICE CENTRES 1.1. Guarantee validity The warranty is supplied under the terms, procedu- res and limits stated in the contract. 1.2. Service repairs after guarantee period...

  • Page 7: General And Safety Regulations

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 2. GENERAL AND SAFETY REGULATIONS 2.3. Precautions during servicing IMPORTANT: Before commencing with any As well as following the usual accident prevention intervention, carefully read the information regulations that apply to most repair shops, we...

  • Page 8: Etichette Di Sicurezza

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 2. GENERAL AND SAFETY REGULATIONS 2.4. Etichette di sicurezza readequate ventilation and, therefore, avoid gas poisoning. On the canopy motor, in a immediately identifica- tion position, are some indication or prescription 4 - Motor label (see 3.1])

  • Page 9: Technical Data And Specifications

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 3. TECHNICAL DATA AND SPECIFICATIONS 3.4. Expendable materials 0701 0702 0704 Unleaded (green) Petrol minimum 90N.O. - da 5 a 35 °C SAE 30 Engine oil - da -15 a + 35°C...

  • Page 10: Tightening Torques

    << BACK >> << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 3. TECHNICAL DATA AND SPECIFICATIONS 3.6. Tightening torques 8-10 Nm 80-90 Nm 4-6 Nm 8-12 Nm 8-10 Nm 15 Nm 8-10 Nm 8-10 Nm 16-18 Nm 8-12 Nm...

  • Page 11: Table Of Tightening Torques

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 3. TECHNICAL DATA AND SPECIFICATIONS 3.7. Table of Tightening torques Chapter Ref. Description of screw Tightening torques Tank fixing screws 8 - 10 Nm Tank fixing nut 8 - 10 Nm...

  • Page 12: Identification Of Engine Units

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 3. TECHNICAL DATA AND SPECIFICATIONS 3.8. Identification of engine units For ease of reference, this manual has subdivided maintenance operations into different sections, each of which refers to an engine component unit as indicated in the diagrams below.

  • Page 13: Engine Tuning And Testing

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 4. ENGINE TUNING AND TESTING 4.1. Operating guidelines The engine requires a series of interventions (shown in the table below) in order to ensure minimum basic maintenance. Every 25 Every 50...

  • Page 14: Functional Test

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 4. ENGINE TUNING AND TESTING 4.3. Functional test A functional test needs to be carried out at the end of each servicing operation, to check that the operations made are effective. The test must be...

  • Page 15: Tank And Supply

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 5. TANK AND SUPPLY IMPORTANT: Carefully read the information below before commencing any intervention. General Information The fuel supply system comprises the petrol tank connected to the carburettor by a pipe; a mesh filter at the bottom of the tank prevents deposits and impurities from reaching the carburettor.

  • Page 16: Emptying And Removing The Tank

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 5. TANK AND SUPPLY 5.1. Emptying and removing the tank 1 - Remove the ring (1) of the petrol pipe (2) from the tank side and drain all the fuel from the tank and the pipe into a suitable container.

  • Page 17: Checking And Cleaning The Breather Pipe

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 5. TANK AND SUPPLY 5 - Empty the tank and dispose of the petrol used for cleaning in accordance with the laws in force. 5.1] 6 - Refit the tank tightening the screws (3) and the nut (4) to the torques indicated.

  • Page 18: Starting System ( Manual Starter)

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 6. STARTING SYSTEM manual starter) General information The starter assembly inside the cover consists of a rope wound around a pulley. The movement from the pulley to the flywheel (and the engine shaft) is transmitted by a pair of hooks. The rope is returned and rewound by a spiral spring.

  • Page 19: Replacing The Hooks

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 6. STARTING SYSTEM manual starter) 4 - Insert one end of the rope (5) (ø 3.5mm - length 2500mm), through the guide in the ventilation grille, into the hole in the pulley (4), and fasten it by tying a knot.

  • Page 20: Starting System ( Electric Starter)

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX INDEX 7. STARTING SYSTEM electric starter) General information The electric starter system consists of a motor supplied by a 12 Volt battery (mounted on the machine). The battery is charged by a coil type alternator which receives impulses from the magneto flywheel.

  • Page 21: Disassembly And Cleaning The Starter Motor Pinion

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 7. STARTING SYSTEM electric starter) 7.2. Disassembly and cleaning the starter motor pinion 1 - Remove the cover. 14.5] 2 - Remove the flywheel magneto. 3 - Use a screwdriver to rotate the pinion (1) to check that it spins and moves co-axially and can compress the spring (2).

  • Page 22: Intake System

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 8. INTAKE SYSTEM General information The intake system uses an air filter directly connected to the carburettor by means of a manifold which conveys the air/petrol mixture to the inlet valve.
  • Page 23 << BACK >> << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 8. INTAKE SYSTEM 4 - Bang the air filter element on a hard surface so as to remove excess dirt, and blow it through with compressed air, outwards from the inside.

  • Page 24: Maintenance Of Filtering Element ( Sponge)

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 8. INTAKE SYSTEM 8.1a. Maintenance of filtering element ( sponge) 8.1] 1 - Remove the cover and remove the filter element (1). WARNING: When the filter element is remo- ved the intake duct should be covered to avoid foreign bodies from entering.

  • Page 25: Carburation

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 9. CARBURATION General information The carburettor has a float with a fixed jet and a “CHOKE” control. See the relevant section for advice on resolving problems due to carburation. The carburettor is located on the left-hand side of the engine. For maintenance operations it is necessary to dismantle the air intake filter in the sequence shown below.
  • Page 26 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 9. CARBURATION 4 - Remove the gasket (6) and move the intake butterfly rod to the minimum position. 5 - Using pliers, disconnect the intake butterfly rod (7) and slide the small rod (8) for the relative com- pensation spring upwards.
  • Page 27 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 9. CARBURATION 8 - Pull out the pin (15), dismount the float (16) and remove the gasket (17). 9 - Undo the main jet (18) and pull out the pilot jet (19).

  • Page 28: Sostituzione Del Carburatore

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 9. CARBURATION 9.2. Sostituzione del carburatore 1 - Perform operations 1 - 2 - 3 - 4 - 5 - 6 - 12 - 13 - 14 9.1] - 15 indicated in section above.

  • Page 29: Governor System Of The Carburettor

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 10. GOVERNOR SYSTEM OF THE CARBURETTOR General information The carburettor governor system uses a engine shaft linkage fitted on a support fixed to the left-hand side of the engine, completed by a counterweight device, driven by the camshaft, and thus sensitive to changes in the engine’s revolution pattern depending on load.

  • Page 30: Adjusting Maximum Speed

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 10. GOVERNOR SYSTEM OF THE CARBURETTOR 10.2. Adjusting maximum speed 1 - Check that the throttle cable is adjusted cor- 10.1]. rectly 2 - Let the engine heat up for a few minutes then FAST set the throttle control to “FAST”.

  • Page 31: Replacing The Lever Support

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 10. GOVERNOR SYSTEM OF THE CARBURETTOR 6 - If the above checks do not show any faults, the phasing of the governor’s control lever (13) with respect to the counterweight device must be...

  • Page 32: Ignition

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 11. IGNITION General information The ignition system has a flywheel with an electronic coil which supplies high voltage to the spark plug. See the relevant section for advice on resolving problems related to the ignition.

  • Page 33: Checking The Starter Micro Switch ( Version With The Electric Starter Mounted On The Grass Cutter)

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 11. IGNITION 11.2. Checking the starter micro switch ( Ver- sion with the electric starter mounted on the grass cutter) 1 - Disconnect the two connectors (6). 2 - Using an Ohmmeter tester, (7) make contact with the prods on terminals of the microswitch (8).

  • Page 34: Adjusting The Air Gap And Checking The Coil

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 11. IGNITION 11.3. Adjusting the air gap and checking the coil 6.1]. 1 - Remove the starter assembly 2 - Make sure that the earth cable faston (10) of the coil (11) is not oxidized; if it is, disconnect, clean and remount it, spraying it with a special antioxidant.

  • Page 35: Replacing The Coil

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 11. IGNITION 7 - Perform a spark test as indicated in 11.1]. - If the spark jumps: the coil functions properly and in the event of malfunction, verify that the cut-off cable (17) is not earthed.

  • Page 36: Turning Off And Stopping The Engine

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 12. TURNING OFF AND STOPPING THE ENGINE General information Version with the electric starter mounted on the grass cutter The engine is turned off and stopped by releasing a lever on the lawnmower. The cable acts on a lever which simultaneously activates a microswitch that sends the coil to earth as well as a brake which acts on the flywheel.

  • Page 37: Checking The Brake

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 12. TURNING OFF AND STOPPING THE ENGINE 12.3. Checking the brake 6.1]. 1 - Remove the starter assembly > 2 mm 2 - Check that the thickness of the friction pad (9) is not less than 2 mm at its thinnest point.

  • Page 38: Replacing The System For Turning Off And Stopping The Engine

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 12. TURNING OFF AND STOPPING THE ENGINE 12.4. Replacing the system for turning off and stop- ping the engine 6.1]. 1 - Remove the starter assembly 2 - Remove the filter assembly.

  • Page 39: Exhaust System

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 13. EXHAUST SYSTEM General information The exhaust system consists of a muffler installed on the cylinder together with a gasket, a spacer and a heatproof baffle. In the version with the tractor mounted exhaust system, we suggest that the operator consults the ma- nual supplied with the vehicle.

  • Page 40: Engine Block - External Operations

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 14. ENGINE BLOCK - External operations 14.1. Checking the compression 1 - Remove the cap (1) and take out the spark plug (2). 2 - Manually set the piston to the TDC (Top Dead Centre) of the compression stroke so that both valves are closed.

  • Page 41: Adjusting The Valve Clearance

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 14. ENGINE BLOCK - External operations 14.2. Adjusting the valve clearance WARNING: The adjustment must be made with the engine is cold. 1 - Remove the cover and demount the spark plug 14.1].

  • Page 42: Dismantling And Cleaning The Cylinder Head

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 14. ENGINE BLOCK - External operations 14.3. Dismantling and cleaning the cylinder head 9.2]. 1 - Remove the carburettor 13.1]. 2 - Remove the exhaust muffler 3 - Remove the cover and demount the spark plug 14.1].

  • Page 43: Overhauling The Cylinder Head And Valves

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 14. ENGINE BLOCK - External operations 14.4 Overhauling the cylinder head and valves NOTE - These paragraphs describe all the operations for checking and overhauling the cylinder head; it is left to the operator to assess the advisabi-...
  • Page 44 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 14. ENGINE BLOCK - External operations 7 - Apply abrasive paste for grinding around the rim of the valve head (19) and then insert the valve into its seat. Use the special manually operated tool (22) to grind the seat and rim of the valve.

  • Page 45: Dismantling And Replacing The Magneto Flywheel

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 14. ENGINE BLOCK - External operations 14.5. Dismantling and replacing the magneto flywheel 6.1]. 1 - Remove the starter assembly 2 - Using an airgun, undo the nut (24) and extract the fan (25), setting aside the starter cup (26).

  • Page 46: Alternator Removal And Replacement Electric Starter Version)

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 14. ENGINE BLOCK - External operations 14.6. Alternator removal and replacement electric starter version) 1 - Remove the screws and disconnect the con- nectors from the live cable. In case of malfunction replace the alternator.

  • Page 47: Checking The Oil Breather

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 14. ENGINE BLOCK - External operations 14.7. Checking the oil breather 14.5]. 1 - Remove the magneto flywheel 2 - Unscrew the two screws (32) fixing the closing plate (33). 3 - Check that the reed (34) is not blocked or de- formed.

  • Page 48: Replacing The Lower Compression Ring Of The Engine Shaft (Sump Side)

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 14. ENGINE BLOCK - External operations 14.9. Replacing the lower compression ring of the engine shaft (sump side) NOTE - Before executing this operation di- scharge all the oil from the bowl and rotate 180°...

  • Page 49: Engine Block - Overhauling Internal Parts

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 15. ENGINE BLOCK - Overhauling internal parts 15.1. R e m o v i n g t h e e n g i n e ( f r o m t h e lawnmower) 5.1].

  • Page 50: Carter Opening

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 15. ENGINE BLOCK - Overhauling internal parts All the following operations on the grass cutter necessitate the removal of the motor. 15.2. Carter opening 1 - Position the engine on a stable support and remove the sparkplug.

  • Page 51: Dismantling And Checking The Camshaft And Counterweight Governor

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 15. ENGINE BLOCK - Overhauling internal parts 15.3. Dismantling and checking the camshaft and counterweight governor 1 - Bring the piston to the TDC (Top Dead Centre). 15.2]. 2 - Open the crank case 3 - Remove the camshaft (10).
  • Page 52 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 15. ENGINE BLOCK - Overhauling internal parts 8 - In the case of breakage or irregular operation of the counterweights the whole group, fixed by a plate (16) and a screw (17) must be replaced.

  • Page 53: Dismantling And Checking The Piston, Piston Rings, Connecting Rod And Engine Shaft

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 15. ENGINE BLOCK - Overhauling internal parts 11 - When refitting the camshaft, maximum care must be taken to match up the two references (22) and (23) punched on the gears, so as to ensure correct distribution phasing.
  • Page 54 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 15. ENGINE BLOCK - Overhauling internal parts 9 - To check the wear in the compression rings, insert them one at a time into the cylinder (28) by about 10-15 mm and measure the gap between the two ends with a feeler gauge (30);...
  • Page 55 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 15. ENGINE BLOCK - Overhauling internal parts 13 - Check the diameter of the gudgeon pin (34) in several places and replace it if it is less than 12.95 mm, even at a single point.
  • Page 56 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 15. ENGINE BLOCK - Overhauling internal parts 16 - Remove the engine shaft (35), checking the diameter of the connecting rod pin with a digital gauge. The value must not be less than 25,92 mm or the engine shaft will have to be replaced.
  • Page 57 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 15. ENGINE BLOCK - Overhauling internal parts 20 -Put the piston into the ring compression tool (41). 21 - Oil the inside of the piston liberally and insert the piston, with the marking facing the exhaust.
  • Page 58 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 15. ENGINE BLOCK - Overhauling internal parts 24 - Close the carter and fix the screws (6) to the 15.2]. indicated couple 25 - Whenever the engine shaft is dismantled and...

  • Page 59: Troubleshooting

    << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 16. TROUBLESHOOTING PROBLEM CAUSE SOLUTION The engine brake cable is faulty or Adjust and/or replace the cable 12.1] unfastened Replace the whole shut-down group The micro switch is faulty 12.2] Check electrical cabling of earth wire Coil earth connection 11.2]...
  • Page 60 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 16. TROUBLESHOOTING PROBLEM CAUSE SOLUTION The throttle cable is not well adju- Check and/or adjust the throttle ca- 10.1] sted The governor malfunctions or there is Check the entire governor system...
  • Page 61 << BACK >> << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX 16. IDENTIFICAZIONE DEGLI INCONVENIENTI PROBLEM CAUSE SOLUTION for the electric starter version) Flat battery Check and recharge the battery Check that the battery corresponds Battery inadequate to what is given in the machine spe- cifications.
  • Page 62 << BACK >> Engine WBE 0701-WBE 0702-WBE 0704 INDEX pag. 63 Release 01 - 04/2009 Service manual...

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