Rato RV550 Service Manual Download

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RV550

Service Manual

Chongqing RATO Technology Co., Ltd.

Summary of Contents for RV550

Page 1: ...RV550 Service Manual Chongqing RATO Technology Co Ltd...

Page 2: ...refer to this Manual at any time This Manual describes correct methods to service this equipment The Company does not undertake any liability for any personal casualty and equipment damage caused due...

Page 3: ...ol and one of three kinds of tips Danger Warning Caution in front of each safety warning Details are as follows Failed to follow instructions extremely serious injury or death will be caused Failed to...

Page 4: ...r 14 Part IV Disassembly and Maintenance 15 4 1 Troubleshooting 15 4 1 1 Start difficulty 15 4 1 2 Underpowered 16 4 1 3 Unstable speed 17 4 1 4 Unable to Ignite 18 4 1 5 Overheating of general purpos...

Page 5: ...omponents of general gasoline engine Spark plug Starter motor components Voltage regulator Engine outer cover Spark plug cap Engine dust cover Air filter Secondary oil filter Gasoline pump component F...

Page 6: ...Inductance type Power output mode Vertical axis output 1 3 Maintenance limit Unit mm Parts Item Standard Service limit Gasoline engine Maximum speed without load Idle speed Cylinder pressure 3 000 10...

Page 7: ...diameter of valve stem Intake 6 563 6 575 6 418 Exhaust 6 548 6 56 6 375 Inner diameter of Conduit Intake Exhaust 6 60 6 615 6 662 Width of valve seat 1 2 2 Free length of spring 39 5 38 Camshaft Cam...

Page 8: ...5 Part II Dimension and Torque 2 1 Dimensions of general purpose gasoline engine 480 406 315...

Page 9: ...6 2 2 Locations of mounting holes 2 3 PTO installation drawing...

Page 10: ...motor components M8 55 24 2 Charging coil combination M5 25 7 1 Flywheel nut cast iron flywheel M16 1 5 160 10 Ignition coil mounting bolt M6 25 10 2 Air filter intake pipe M6 10 2 Mounting nut of go...

Page 11: ...nce shall be carried out according to the above table as soon as possible Maintenance period Item Every time 1st month or 10 hours at the first time Every 3 months or 20 hours Every 6 months or 50 hou...

Page 12: ...y RV550 1 5L SAE10W 40 is the recommended general purpose oil at common temperatures the oil with other stickiness could be used when the temperature in your area is within the range shown in the char...

Page 13: ...ine s air filter shall be cleaned every 20 h or 3 months and the air filter element shall be replaced every 50 h Cleaning times shall be added in harsh environment and replacement shall be made if nec...

Page 14: ...clean the debris around the spark plug b Disassemble the spark plug with special socket and handle of the spark plug c Check the spark plug visually if there is obvious wear or damaged insulator it sh...

Page 15: ...rk plug is reinstalled an additional 1 8 1 4 turn shall be tightened after pressing the washer Spark plug torque value 22 2 N m Spark plug model F6RTC The spark plug must be tightened properly or it m...

Page 16: ...areful the false timing insert the screwdriver into the spark plug hole to detect the height of the plug c Loosen the valve lock with 10 mm wrench the spacing between the valve lock top surface and th...

Page 17: ...rance Intake valve 0 10 0 15 mm Exhaust valve 0 15 0 20 mm Adjusting nut Valve clearance Tighten Decrease Loosen Increase Excessive gap Late opening of intake and exhaust valves shortens the intake an...

Page 18: ...s dirty with carbon deposit Remove the dirt and carbon deposit Insulator is damaged electrode is severe ablated Replace the spark plug Electrode gap is incorrect Adjust electrode gap HV wire has no sp...

Page 19: ...tion and drain off the fuel in the carburetor Remove the spark plug cap and spark plug Pull the starter handle to release unburned gas out of the cylinder Assemble spark plug cap Ground the negative e...

Page 20: ...Unstable speed Phenomenon Cause Remedy There is knocking noise in gasoline engine Excessive wear of piston cylinder and piston ring Replace worn parts Excessive wear of piston pin and pin hole Replac...

Page 21: ...Shutdown line is placed on the body Find short circuit point and re insulate Other Severe cylinder scraping falling off of the valve Repair and replace damaged parts 4 1 5 Overheating of general purp...

Page 22: ...g precautions will cause the void of warranty commitment provided with gasoline engine and it may damage the gasoline engine or cause personal injury Therefore before operating gasoline engine the use...

Page 23: ...efuel at a well ventilated place The engine shall be shut down when refueling Do not smoke or make naked flame or spark in the place where gasoline engine is fueled or in fuel storage site 9 Do not ov...

Page 24: ...I Outer seat ring assembler IV Assembler handle V Inner seat ring assembler VI Diamond grinder 45 VII Diamond grinder 32 VIII Flywheel puller IX Bearing puller X Valve guide reamer Correction of intak...

Page 25: ...e process of long term using the muffler will produce the carbon deposit which causes a serious impact on the exhaust system In order to make the exhaust system work better we often need to remove the...

Page 26: ...he muffler will get heat please put this gasoline engine at a place that the passersby and children can t accessible During the operation of the gasoline engine any combustible good shall not be place...

Page 27: ...replace it if necessary Do not clean foam filter element with gasoline acidic alkaline or organic solvents Do not pull and wring the sponge forcefully as this will damage it Be sure not to start the...

Page 28: ...re relief bolt 4 Hexagon flange bolt 16 Screen cover 5 Speed control gear components 17 Pressure relief valve spring 6 Speed regulating core shaft press plate 18 Steel ball 7 Hexagon flange bolt 19 Oi...

Page 29: ...rea can be improved by installing small diameter main metering jet of the carburetor and re adjusting adjustment screw of idle mixing ratio If you often use the gasoline engine at the region of above...

Page 30: ...too great and other factors filter device shall not be too dense hence some tiny impurities in air will still enter the carburetor via the air filter The carburetor shall be cleaned on a clean site C...

Page 31: ...fastening bolt check whether the gasoline leaks Float chamber face the oil drain bolt to choke switch during installation Electron magnetic valve Float chamber seal gasket Float After installation pre...

Page 32: ...fter cleaning the carburetor restore the mixing ratio adjusting screw Disassemble it only when repairing the carburetor d Carburetor idle speed adjustment Start the gasoline engine and warm up to norm...

Page 33: ...Assembly a Before assembling clean dirt oil grease and other foreign substances on the crankcase and tapering part of the flywheel Make sure that magnetic steel part of the flywheel is not stuck with...

Page 34: ...ping screw 10 Engine dust cover a Disassembly Air filter carburetor starter assembly b Use a thickness gauge to measure the gap between ignition coil and flywheel c Adjustment Gap between ignition coi...

Page 35: ...he tester to HV harness and make contact between the other end and coil core to measure resistance value on the secondary side of the coil The resistance value of secondary coil 5 7 k recommended valu...

Page 36: ...ect the output voltage As the detection requires starting the engine this operation will be dangerous Non professional personnel are not allowed to do the detection No load detection Charging coil out...

Page 37: ...head cover Cylinder head cover gasket Valve locking nut Valve adjustment nut Exhaust valve rocker arm Valve rocker arm Valve adjusting cap Valve gutter Valve spring seat Rocker arm shaft bolt Tappet...

Page 38: ...ad gasket Spark plug Cylinder head cover gasket Cylinder head Assembly Before installation remove carbon deposit in the combustion chamber check the contact state of valve seat and then measure the co...

Page 39: ...18 mm 6 375 mm Free length of valve spring Measure free length of valve spring If it is below the standard or exceeds service limits replace the spring Standard Maintenance limit 39 5 mm 38 mm Valve g...

Page 40: ...e hole of valve guide pipe which shall be in the center of valve guide pipe and shall be straight and unobstructed and insert the valve to inspect whether the action is smooth If not the valve guide m...

Page 41: ...valve seat are not concentric c Grind the valve seat by 45 grinder to create a smooth valve seat being concentric with the valve guide rotate it clockwise and not it is not allowed to rotate counterc...

Page 42: ...lorant on valve cone face to insert the valve and press the valve several times with effort but ensure that the valve does not rotate on the valve seat The surface of valve seat is evenly dyed with co...

Page 43: ...he oil seal during installation and push it until the bearing contacts the crankshaft case Piston ring components Piston Piston pin Snap ring of piston pin Connecting rod Connecting rod bolt Torque 16...

Page 44: ...gs keep away from the direction of piston pin and scatter by 120 Assembly a Snap ring of piston pin Jack the front end at the piston groove to clamp the other end with a nose plier and mount it in the...

Page 45: ...he oil seal d Piston Lubricate the piston and cylinder block with oil When installing put the mark on the top of the piston towards the side of the push rod hole Piston inspection Inspect the contact...

Page 46: ...94 36 mm b The clearance between piston pin hole and piston pin Use the inside micrometer and the outside micrometer to measure the inner diameter of the piston pin seat hole and the outer diameter o...

Page 47: ...be stuck in the cylinder due to thermal expansion during operation causing that the piston ring is broken or even cylinder scraping Ring opening clearance is small the opening can be filed by thin fl...

Page 48: ...open or close Its structural feature is On the shaft there are the cam and supporting journal meeting the requirements for controlling air intake and exhaust When the cam is working it bears the peri...

Page 49: ...ctors such as low oil viscosity many impurities and small circulating oil volume is unable to form complete oil film on the camshaft surface to cause it to be in a state of high speed dry friction res...

Page 50: ...w one for any case When replacing new parts it is better to replace the whole part to ensure that there is a more consistent meshing surface b Assembly Oil seal Apply lubricating oil around new oil se...

Page 51: ...am Illumination load Battery Starter switch Load charging Fuse Starter relay starter motor Flywheel assembly 12V half wave voltage regulating rectifier Ignition coil Three point discharger Voltage reg...

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Rato RV550, Service Manual

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