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However the basic specifications and different operating procedures will remain the same. by STIGA - No use of the illustrations or duplication, reproduction or translation, even partial, of the texts in this document may be made without explicit authorization.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V CONTENTS INTRODUCTION ..................... 5 1. RULES AND PROCEDURES FOR SERVICE CENTRES .......... 6 1.1. Guarantee validity ...........................6 1.2. Service repairs after guarantee period ....................6 1.3. Fault notification ............................6 1.4. Spare parts request ..........................6 2.
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V CONTENTS 8. GOVERNOR SYSTEM OF THE CARBURETTOR ..........29 8.1. Adjusting of accelerator cable ......................29 8.2. Verify petrol pump (if present) ......................30 8.3. Pump replacement (if present) ......................30 8.4. Adjusting maximum speed ........................31 9.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX INTRODUCTION The purpose of this manual is to provide to Service Certain symbols are used in the manual, highlighting Centres the information necessary for a correct particularly important information, risks, warnings maintenance, dismantling and repair procedure and prescriptions: for engines TRE 586V - TRE 586VA - TRE 635V.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 1. RULES AND PROCEDURES FOR SERVICE CENTRES 1.1. Guarantee validity The warranty is supplied under the terms, procedures and limits stated in the contract. 1.2. Service repairs after guarantee period The Service Centre must write a report for each intervention containing the serial number of the 3.1], summary information about the engine[...
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 2. GENERAL AND SAFETY REGULATIONS IMPORTANT: Before commencing with any 2.3. Precautions during servicing intervention, carefully read the information As well as following the usual accident prevention provided in the present manual, in particular regulations that apply to most repair shops, we the following safety regulations.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 2. GENERAL AND SAFETY REGULATIONS - Electrical cabling Short circuits can cause fires. Prevent by following Exhaust gas contains carbon monoxide, which the precautions below: is highly toxic, odourless and colourless. - Always keep the electrical connections of the Avoid inhaling.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 3. TECHNICAL DATA AND SPECIFICATIONS 3.4. Expendable materials Unleaded (green) Petrol minimum 90N.O. - from 5 to 35 °C Engine oil SAE 30 - 10W30 - from -15 to +35 °C RN9YC (Champion) Spark plug or equivalent...
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 3. TECHNICAL DATA AND SPECIFICATIONS 3.7. Table of Tightening torques Chapter Ref. Description of screw Tightening torques Fixing screw starting motor 24 - 32 Nm Starting motor screw 8 - 12 Nm Fixing nuts carburettor and filter 8 - 12 Nm Support screws petrol pump 8 - 12 Nm...
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V 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. Air intake Ignition Carburettor...
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V 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 Every 5 First 5 hours or...
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 4. ENGINE TUNING AND TESTING 4.2. Changing the engine oil NOTE - Drain the engine oil when the machine is stationary but not completely cold so as to ensure that the oil is drained quickly and completely.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 4. ENGINE TUNING AND TESTING 4.3. Change oil filter 1 - Protect the underlying surface from oil leaks with a cloth. 2 - With the help of plier (4) unscrew the filter (5) in anti-clockwise to remove it.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 4. ENGINE TUNING AND TESTING 4.4. Engine tuning program c. Check the engine rpm As part of general engine tuning or any intervention When the engine is hot enough, check the engine on the machine, it is recommended that the Service speed with the throttle control set to “SLOW”...
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 5. PETROL SUPPLY AND AIR INTAKE IMPORTANT: Carefully read the information below before commencing any intervention. General information The petrol supply occurs via a tank mounted on the machine and connected to the carburettor by a pipe. A filter, positioned between the tank and the petrol pump, stops deposits and impurities from reaching the carburettor.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 5. PETROL SUPPLY AND AIR INTAKE General information The filtering system consists of an air filter directly connected to the carburettor and an internal manifold, located between the carburettor and the cylinder head, which carries the air/petrol mix towards the intake valve.
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 5. PETROL SUPPLY AND AIR INTAKE 4 - Touch the cartridge on a solid surface and blow with compressed air from the interior side to remove dust and product residues. IMPORTANT! For the cartridge cleaning don’t use water, petrol, detergent.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 6. STARTING SYSTEM General information The starting system consists of the starting motor mounted on the engine casing which transmits movement to the flywheel and therefore, to the engine shaft. See the relevant section for advice on resolving problems due to the malfunctioning of the starting system.
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 6. STARTING SYSTEM 4 - Remove the two screws (5) and remove the starter motor (6). 5 - Unscrew the two screws (7) and remove the lower part of the starter motor. 6 - Completely remove the nut (8) to remove the mass brushes (9) from the housing.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 6. STARTING SYSTEM Verify the condition of the brushes and, using a gauge (11), measure the length which should be between 11,7 and 8,0 mm. If the length is shorter, the brushes must be replaced as indicated below.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 7. CARBURATION Informazioni generali 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 placed on the front side of the engine and for its maintenance it is necessary to disassem- 6.1] 5.1].
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 7. CARBURATION 4 - Release the locking clip (7), remove the tie rod (8) of the “CHOKE” lever from its housing and the spring (9). 5 - Using plier, remove the clamp (10) and disconnect the petrol hose (11).
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 7. CARBURATION 8 - Completely remove the carburettor (15) from its housing and the gauge (16) with the two gaskets. It is always advisable to check and, if necessary, replace the gaskets on the gauge (16), when reassembling the carburettor (15).
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 7. CARBURATION 12 - Check that no impurities or dirt are deposited in the seat (25) of the needle (26). Verify that the rubber tip of the needle is not marked or worn.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 7. CARBURATION 7.4. Adjusting maximum speed NOTE - This operation is carried out by adjusting the governor system 8.4]. 7.5. Adjusting the carburation NOTE - The carburation is set in the factory and does not normally need changing.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 8. 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.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 8. GOVERNOR SYSTEM OF THE CARBURETTOR 3 - Push the speed regulator lever (4) right until insert a plug (5) in the appropriate seat. 4 - Make sure that the throttle control lever is in “FAST”...
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 8. GOVERNOR SYSTEM OF THE CARBURETTOR 8.4. Adjusting maximum speed 1 - Check that the throttle cable is adjusted 8.1]. correctly 2 - Let the engine heat up for a few minutes then set the throttle control to “FAST”...
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 8. GOVERNOR SYSTEM OF THE CARBURETTOR - loosen the nut (21) of the regulator arm grip but do not remove it. - turn the regulator pin (22) anti-clockwise completely with plier. - without changing the position of the lever (19), turn the regulator pin (22) fully clockwise with a plier, then lock the nut (21).
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 9. IGNITION General information The ignition system is of the magnet flywheel type, with electronic coils that supply high voltage to the spark plugs. See the relevant section for advice on resolving problems related to the ignition. 6.1].
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 9. IGNITION 9.2. Adjusting the air gap and checking the coil NOTE - The following operations must be performed on both coils. 6.1]. 1 - Remove the cowl 2 - Make sure that the earth cable faston (6) of the coil (7) is not oxidized;...
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 9. IGNITION 8 - Insert the tester terminal and remove the high voltage of the wire spark plug cap in contact with the iron wire and measure the resistance of the secondary coil. The resistance value must be between 18,2 and 21,2 Ω.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 9. IGNITION 9.3. Replacing the coil NOTE - The following operations must be performed on both coils. 6.1]. 1 - Remove the cowl 2 - Disconnect the faston of the earth cable (6). 3 - Unscrew the screws (9) and remove the coil (7).
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK - External repairs 10.1. Checking the compression NOTE - The following operations must be performed on both spark plugs. 1 - Remove the cap (1) and take out the spark plug (2).
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK – External repairs If necessary, remove the engine of the machine 11.1]. according to indications in paragraph 10.2. Adjusting the valve clearance NOTE - The following operations must be performed on both pairs of valves WARNING: The adjustment must be made with the engine is cold.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK – External repairs 7 - The gap is adjusted by slackening off the nut (11) and suitably adjusting the register nut (12) until the above condition is reached. 8 - Following adjustment, check that the pushrods (13) are properly inserted in the rocker arm housings (14) and always fully tighten the nut (11).
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK – External repairs 5 - Clean the cylinder head (18) and cylinder surfaces (19). 6 - Carefully clean the inside of the combustion chamber and remove possible deposits from the valve seats.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK – External repairs 10.4. 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 advisability of performing all the operations described or only part of them, depending on the type of engine problems encountered.
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK – External repairs 6 - Remove the cup-washer (22), the spring (26) and the two half-cones (25). 7 - Remove all incrustations from the valve head (27) with abrasive cloth and check the thickness of the margin (A);...
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK – External repairs 11 - Apply abrasive paste for grinding around the rim of the valve head (27) and then insert the valve into its seat. 12 - Use the special manually operated tool (30) to grind the seat and rim of the valve.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK – External repairs - insert the valve and position the spring (26), the cup-washer (22) and the two half-cones (25) and follow the removal procedure in reverse using the tool (24), to lock the two half-cones into place.
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK – External repairs 5 - Using a pneumatic gun, unscrew the nut (37) and recover the washer (38). Using a suitable extraction tool, remove the flywheel (39) as indicated in the diagram. Ensure that the engine shaft key is retained.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK – External repairs 10.6. Checking the oil breather 10.5]. 1 - Remove the magneto flywheel 2 - Unscrew the four screws (41) that secure the closing plate (42) of the Blow-by tube. 3 - Check that the lamella (43) is not blocked or deformed and check the status of the filter (44).
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK – External repairs 3 - Disconnect the two connectors (49) and (50) and remove the alternator (47) from the seat. 4 - Use a thin screwdriver inserted under the sealing lip to extract the oil seal ring (51).
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 10. ENGINE BLOCK – External repairs 10.9. Replacing the lower compression ring of the engine shaft (sump side) NOTE - Before executing this operation discharge all the oil from the sump and rotate 180° the motor. 1 - Use a thin screwdriver inserted under the sealing lip to extract the oil seal ring (55).
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts All the operations below require that the engine is removed from the machine. 11.1. Remove the engine from the machine 1 - CONFIGURATION A: Disconnect the throttle/ 8.1].
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts 5 - Open the crankcase sump by unscrewing the ten screws (9). 6 - verify the phasing between: - the engine shaft and the camshaft; If necessary, re-set the phasing, referring to the indications provided.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts 11.3. Dismantling and checking the camshaft and counterweight governor 1 - Remove oil pump cover and the housing 11.2]. 2 - Remove the camshaft (15). 3 - Check the movement of the oil pump spindle (16) in the slot of the camshaft.
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts 9 - In the case of breakage or irregular operation of the counterweights assembly; remove the centrifugal assembly, and retaining the shim washer (22). 10 - After the check, reassemble the centrifugal regulator making sure that the washer (22) is correctly positioned at the base of the regulator and...
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts 13 - Before fitting the camshaft ensure that the two tappets (25) are correctly housed in their seats. 14 - When refitting the camshaft, maximum care must be taken to match up the two references (26) and (27) punched on the gears, so as to ensure correct distribution phasing.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts 11.4. Dismantling and checking the piston, piston rings, connecting rod and engine shaft NOTE - These paragraphs describe all the operations for checking and overhauling the thermal components of the engine;...
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts 12 - To check the wear in the compression rings, insert them one at a time into the cylinder (32) by about 10-15 mm and measure the gap between the two ends with a feeler gauge (35);...
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts 16 - Check the diameter of the gudgeon pin (39) in several places and replace it if it is less than 16,90 mm, even at a single point. 17 - Check the diameters of the gudgeon pin housings (A) on the piston (31) and replace the piston if they are more than 17,07 mm, even at a...
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts 19 - Remove the engine shaft (40), checking the diameter of the connecting rod pin with a digital gauge. The value must not be less than 37,93 mm or the engine shaft will have to be replaced.
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts 22 - Fit the connecting rod (29), gudgeon pin and clamping rings to the piston (31). Piston marking must point towards the exhaust. 23 - When installing the connecting rods, check that the chamfers of the hole (motor shaft fixing) are opposite each other.
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts 26 - Oil the inside of the piston liberally and insert the piston, with the marking facing the exhaust. 27 - Mount the engine shaft (40) and the connecting rod cap (28) with the relative screws (30), taking care with the position references (47) so as to avoid inverting the mounting direction of the cap.
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 11. ENGINE BLOCK - Overhauling internal parts Tightening torques Screws oil pump cover 8-12 Nm Union screws under carter and sump 24-32 Nm Fixing screws lower connecting 11-13 Nm rod cap Technical information Oil sump capacity 1,70 litres...
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 12. TURNING OFF AND STOPPING ENGINE For maintenance operations relating to this section, refer to the manual specific to the machine on which the engine is mounted. 13. EXHAUST SYSTEM For maintenance operations relating to this section, refer to the manual specific to the machine on which the engine is mounted.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 14. TROUBLESHOOTING PROBLEM CAUSE SOLUTION No power supply to battery 10.8] Check alternator charge Starting motor short circuit (burnt rotor 6.2] Replace starting motor and stator) Check electrical cabling of earth wire No earth 9.1] Earth wire is flattened...
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 14. TROUBLESHOOTING PROBLEM CAUSE SOLUTION Internal petrol pump membrane 8.3] Replace pump broken The tank cap has a clogged breather Clean and/or replace the cap pipe The engine starts but does Dismount the cylinder head and re- Fouling in the combustion chamber not run...
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 15. CHARGING SYSTEM 15.1 Electrical diagram NOTE - The colors of the cables can change according to the type of motors. pag. 64 Service manual Release 00 - 12/2019...
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 15. CHARGING SYSTEM 15.2 Control of the charging system 1. Always check the condition of the battery before checking other parts of the charging system. The battery must be fully charged in order to conduct accurate system tests. 2.
<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX 15. CHARGING SYSTEM 15.3 Recharge system diagram Performance parameters Standard Service limits Regulated output voltage 14±1,0 V DC 15,5 V DC Stator output not regulated 41,5±0,5 V AC/3200 rpm/1’ 40 V AC/3200 rpm/1’ pag.
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<< BACK >> Engine TRE 586V-TRE 586VA-TRE 635V INDEX pag. 67 Release 00 - 12/2019 Service manual...
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