GGP Mountfield SV-150 Workshop Manual
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GGP Mountfield SV-150 Workshop Manual

From 2004
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PRINT
INDEX
MANUALE D'OFFICINA
WORKSHOP MANUAL
MANUAL D'ATELIER
KUNDENDIENSTHANDBUCH
MANUAL DE TALLER
REL. 1.0 - 01/2005
SV 150
The manufacturer reserves the right to make all the necessary technical or commercial
improvements to its products, so there may be some differences between the series of
2005
lawnmowers and the contents of this manual. However the basic specifications and
different operating procedures will remain the same.

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Summary of Contents for GGP Mountfield SV-150

  • Page 1 PRINT INDEX MANUALE D'OFFICINA WORKSHOP MANUAL MANUAL D'ATELIER KUNDENDIENSTHANDBUCH MANUAL DE TALLER REL. 1.0 - 01/2005 SV 150 The manufacturer reserves the right to make all the necessary technical or commercial improvements to its products, so there may be some differences between the series of 2005 lawnmowers and the contents of this manual.

  • Page 2: Table Of Contents

    PRINT WORKSHOP MANUAL SV 150 2004 •••• from TABLE OF CONTENTS 1 / 1 page MAIN CHAPTERS ening torques, expendable materials and spare parts available. 1. Rules and procedures for Service Centres This chapter covers all the main aspects of the 4.
  • Page 3 PRINT WORKSHOP MANUAL SV 150 2004 •••• from INTRODUCTION 1 / 1 page INTRODUCTION The purpose of this manual is to help Service The manual refers to the following symbols: Centres service, disassemble and repair SV150 engines. Each page of this manual states the following infor- mation: Warns of operations that should be carried out with utmost care to avoid impairing the func-...

  • Page 4: Rules And Procedures For Service Centres

    PRINT WORKSHOP MANUAL SV 150 2004 1.1. •••• from RULES AND PROCEDURES FOR SERVICE CENTRES 1 / 1 page 1.1 RULES AND PROCEDURES FOR SERVICE CENTRES C) Fault notification A) Warranty validity The warranty is supplied under the terms, pro- The manufacturer should be informed of all cedures and limits stated in the contract.

  • Page 5: Service Centres

    PRINT WORKSHOP MANUAL SV 150 2004 2.1. •••• from GENERAL AND SAFETY REGULATIONS 1 / 1 page 2.1 GENERAL AND SAFETY REGULATIONS normal hazard related to mechanical operations and that can be avoided by taking the necessary care and attention normally required for this type of A) Qualification of operators work.

  • Page 6: Technical Data And Specifications

    PRINT WORKSHOP MANUAL SV 150 2004 3.1. •••• from TECHNICAL DATA AND SPECIFICATIONS 1 / 2 page A) Identification D) Summary of tightening torques The first number refers to the procedure, while the All the engines have a number in brackets is an internal reference to the serial number stamped procedure.
  • Page 7 PRINT WORKSHOP MANUAL SV 150 2004 3.1. •••• from TECHNICAL DATA AND SPECIFICATIONS 2 / 2 page G) Spare parts Filtering element Air filter cover Below is a list of spare parts available, not including Breather pipe parts that are easily available or whose replacement Governor bracket would entail particularly expensive assembly and Governor spring...

  • Page 8: Engine Tuning

    PRINT WORKSHOP MANUAL SV 150 2004 4.1. •••• from ENGINE TUNING AND TESTING 1 / 1 page 4.1 ENGINE TUNING AND TESTING C) Functional test A functional test needs to be carried out at the end A) Operating guidelines of each servicing operation, to check that the oper- ations made are effective.

  • Page 9: Troubleshooting

    PRINT WORKSHOP MANUAL SV 150 2004 5.1. •••• from TROUBLESHOOTING 1 / 5 page A) The engine does not start Probable cause Comment Solution Lawnmower problems The engine brake cable is The cable control does not activate the coil earth Adjust and/or replace faulty or unfastened switch.
  • Page 10 PRINT WORKSHOP MANUAL SV 150 2004 5.1. •••• from TROUBLESHOOTING 2 / 5 page Carburation problems Carburettor is dirty If the jet and the pipes inside the carburettor clog Check and clean the up, the petrol flow drops and the engine fails to carburettor [u 6.4.A] function correctly.
  • Page 11 PRINT WORKSHOP MANUAL SV 150 2004 5.1. •••• from TROUBLESHOOTING 3 / 5 page chamber, the engine stops. After a few minutes, the float chamber fills up and the engine is able to restart, only to stop soon after. Fuel filter clogged Inside the tank, the filter has a metal mesh which Empty and clean the can clog up with dirt or with a film of old fuel.
  • Page 12 PRINT WORKSHOP MANUAL SV 150 2004 5.1. •••• from TROUBLESHOOTING 4 / 5 page Environmental problems The engine is used at a high The rarefaction of air in the mountains causes a Advise your client to altitude drop in power of approx. 10-12% every 1000 adapt the strain of the metres of altitude.
  • Page 13 PRINT WORKSHOP MANUAL SV 150 2004 5.1. •••• from TROUBLESHOOTING 5 / 5 page Electrical problems The earth cable is disconnect- The broken or disconnected cable prevents the Check the earth con- ed or broken microswitch from closing the electric circuit to nection [u 6.7.B] earth...

  • Page 14: Tank And Supply

    PRINT WORKSHOP MANUAL SV 150 2004 6.1. •••• from TANK AND SUPPLY 1 / 2 page 6.1 TANK AND SUPPLY GENERAL INFORMATION The supply system consists of a petrol tank (built into the upper conveyor) connected to the carburet- tor by a pipe. A mesh filter on the bottom of the tank stops deposits and impurities from reaching the carburettor.
  • Page 15 PRINT WORKSHOP MANUAL SV 150 2004 6.1. •••• from TANK AND SUPPLY 2 / 2 page reverse order. WARNING! Check that the petrol pipe (4) is intact and secured correctly before pouring in new fuel. B) Cleaning the tank 11 Remove the conveyor (1) secured by three nuts (2).

  • Page 16: Starting System

    PRINT WORKSHOP MANUAL SV 150 2004 6.2. •••• from STARTING SYSTEM 1 / 3 page 6.2 STARTING SYSTEM GENERAL INFORMATION The starting system is built into the upper conveyor (which also includes the tank) and consists of a cable wound onto a pulley. The movement from the pulley to the flywheel (and the engine shaft) is transmitted by a pair of hooks.
  • Page 17 PRINT WORKSHOP MANUAL SV 150 2004 6.2. •••• from STARTING SYSTEM 2 / 3 page Fit the other end of the cable in the conveyor hole, securing it to the handle (5) with a knot. Turn the pulley (3) and the cable (4) anticlock- wise for approx.
  • Page 18 PRINT WORKSHOP MANUAL SV 150 2004 6.2. •••• from STARTING SYSTEM 3 / 3 page 33 If the spring is not already released, keep hold of the pulley (3) and slowly unwind the entire cable (4) clockwise to release the return spring gradually.
  • Page 19 PRINT WORKSHOP MANUAL SV 150 2004 6.3. •••• from INTAKE SYSTEM 1 / 2 page 6.3 INTAKE SYSTEM GENERAL INFORMATION The intake system uses an air filter which is directly connected to the carburettor and a manifold which conveys the air/petrol mixture towards the induction valve.

  • Page 20: Intake System

    PRINT WORKSHOP MANUAL SV 150 2004 6.3. •••• from INTAKE SYSTEM 2 / 2 page B) Removing the filter body 11 Clean the area around the filter cover (1). 12 Remove the cover (1) by releasing the rear flap (2) and take out the sponge filtering element (3). 13 To remove the filter body (5), loosen the screw (7) fastening the governor system bracket and the two screws (8), remembering that both these...

  • Page 21: Carburation

    PRINT WORKSHOP MANUAL SV 150 2004 6.4. •••• from CARBURATION 1 / 3 page 6.4 CARBURATION GENERAL INFORMATION The carburettor has a float with a fixed jet and a “CHOKE” control. The carburettor can malfunction in the following ways: • difficult or failed start or insufficient power (if not due to other causes): = Carburettor dirty...
  • Page 22 PRINT WORKSHOP MANUAL SV 150 2004 6.4. •••• from CARBURATION 2 / 3 page Loosen the central screw (5) fastening the float chamber (6) and carefully collect all the petrol left in the float chamber. Pull out the pin (7), dismount the float (8) and remove the gasket (9).
  • Page 23 PRINT WORKSHOP MANUAL SV 150 2004 6.4. •••• from CARBURATION 3 / 3 page C) Adjusting minimum speed 21 Check that the throttle cable is adjusted cor- rectly 6.5.A]. 22 Let the engine heat up for a few minutes, then set the throttle control to “SLOW”.
  • Page 24 PRINT WORKSHOP MANUAL SV 150 2004 6.5. •••• from GOVERNOR SYSTEM OF THE CARBURETTOR 1 / 3 page 6.5 GOVERNOR SYSTEM OF THE CARBURET- GENERAL INFORMATION The carburettor’s governor system consists of a lever system mounted on a support attached to the engine’s cylinder head, with a built-in pneumatic device.
  • Page 25 PRINT WORKSHOP MANUAL SV 150 2004 6.5. •••• from GOVERNOR SYSTEM OF THE CARBURETTOR 2 / 3 page B) Adjusting maximum speed 11 Check that the throttle cable is correctly adjust- [u point “A”]. 12 Let the engine heat up for a few minutes then set the throttle control to “FAST”.
  • Page 26 PRINT WORKSHOP MANUAL SV 150 2004 6.5. •••• from GOVERNOR SYSTEM OF THE CARBURETTOR 3 / 3 page element (32), then loosen the screw (33). 23 Loosen the three screws (34) fixing the support (35) to the cylinder head, then remove the sup- port (35) by unhooking the spring (36) from the fin disc (37) and the tie rod (38).

  • Page 27: Ignition System

    PRINT WORKSHOP MANUAL SV 150 2004 6.6. •••• from IGNITION SYSTEM 1 / 3 page 6.6 IGNITION SYSTEM GENERAL INFORMATION The ignition system has a flywheel with an electron- ic coil which supplies high voltage to the spark plug. The starting system can malfunction in the following ways: •...
  • Page 28 PRINT WORKSHOP MANUAL SV 150 2004 6.6. •••• from IGNITION SYSTEM 2 / 3 page and to earth on the engine (5). Activate the starter and see in the instrument if the spark jumps. If the test has a positive result, clean the elec- trodes (2) with compressed air and adjust the distance to 0.6-0.8 mm.
  • Page 29 PRINT WORKSHOP MANUAL SV 150 2004 6.6. •••• from IGNITION SYSTEM 3 / 3 page 17 Carry out a spark test as described in point “A”: – If the spark jumps = the coil functions cor- rectly, so if the system malfunctions, it is due to the earth microswitch or relative cable 6.7.B];...

  • Page 30: Turning Off And Stopping The Engine

    PRINT WORKSHOP MANUAL SV 150 2004 6.7. •••• from TURNING OFF AND STOPPING THE ENGINE 1 / 3 page 6.7 TURNING OFF AND STOPPING THE ENGINE GENERAL INFORMATION 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 31 PRINT WORKSHOP MANUAL SV 150 2004 6.7. •••• from TURNING OFF AND STOPPING THE ENGINE 2 / 3 page B) Checking the ignition off microswitch 11 Remove the upper conveyor 6.1.A]. 12 Disconnect the faston (11) from the coil. 13 Using an Ohmmeter tester, make contact with the prods on terminals “1-COM”...
  • Page 32 PRINT WORKSHOP MANUAL SV 150 2004 6.7. •••• from TURNING OFF AND STOPPING THE ENGINE 3 / 3 page D) Replacing the system for turning off and stopping the engine 31 Remove the upper conveyor 6.1.A]. 32 Disconnect the brake wire (21) from the lever (22).

  • Page 33: Exhaust System

    PRINT WORKSHOP MANUAL SV 150 2004 6.8. •••• from EXHAUST SYSTEM 1 / 1 page 6.8 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. A malfunctioning exhaust system may lead to a loss in power or excess noise.

  • Page 34: Engine Block

    PRINT WORKSHOP MANUAL SV 150 2004 6.9. •••• from ENGINE BLOCK 1 / 2 page 6.9 ENGINE BLOCK GENERAL INFORMATION This engine is designed to significantly reduce the need for servicing internal part, which would often turn out so expensive that it would not be worth the money.
  • Page 35 PRINT WORKSHOP MANUAL SV 150 2004 6.9. •••• from ENGINE BLOCK 2 / 2 page facilitate access to the lower part and drain all the oil. 12 Remove the oil filling cap (11) and position a suitable container for collecting the oil. Unscrew the drain plug (12) and let all the oil pour out.

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