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be done when using.

Part IV Disassembly and Maintenance

4-1 Troubleshooting

4-1-1 Start difficulty

Phenomenon

Cause

Remedy

orm

ind

pre

ion

orm

spa

bnorm

sys

fue

There is no fuel in fuel tank

Refuel

Clogged venthole of fuel tank cap Dredge

Main measuring hole is

improperly adjusted or blocked

Re-adjust or clean, blow through

Float needle hole is blocked

Remove needle valve for repairing,

cleaning and blowing through

The floater is stuck or damaged

Repair the floater

nobs

truc

fue

Fuel is too dirty or deteriorated

Replace fuel

There is water in fuel

Replace fuel

There is excessive fuel in the

cylinder

Drain the fuel, and wipe and dry

spark plug electrode

Fuel label is incorrect

Use according to specified label

orm

suppl

ire

nor

poor

Electrode is 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

ire

spa

norm

HV line is damaged

Replace the HV line

Ignition coil is damaged

Replace the ignition coil

Magnet is demagnetized

Replace the flywheel

The clearance between ignition

coil and flywheel is abnormal

Adjust the clearance between ignition

coil and flywheel

Phenomenon

Cause

Remedy

Cyl

inde

ion

poor

orm

suppl

orm

spa

Piston ring wear exceeds the limit Replace complete set of new ring

Piston ring is broken

Replace complete set of new ring

Piston ring is stuck

Clear carbon deposit

The spark plug is not provided

with sealing gasket or is not

tightened

Mount the gasket and tighten it

Air leakage of joint face between

the cylinder body and cylinder

head

Check the flatness of joint face of

cylinder pad and cylinder body and

cylinder head

And tighten cylinder cover bolts

according to specified torque and

sequence

Содержание RV550

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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