Subaru Robin Power Products R600 manual Disassembly and Assembly of Carburetor

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2)Pilot jet nozzle system

The pilot jet nozzle system controls the fuel supply for engine speeds ranging from idle to low-speed running. The sytem operatzs with the fuel flowng through the main jet nozzle and up to the pilot jet nozzle where the tuel is measured. When the fuel is mixed with air. the volume of the air-me1 mixture is also measurzd by the pilot air jet. From this stage. the mixture is supphed to the engine t‘rom the pilot outlet and bb-pass. During idle. fuel is supplied mainly from the pilot outlet.

3)Main jet nozzle system

The main jet nozzle system supplies fuel for middle and high speed operation. The fuel flows to the main jet nozzle where the fuel quantit) is measured. and then flows to the main nozzle. Air volume. which is measured by the main air jet ~enters from the bleed hole of the main nozzle and miszs with fuel to form a gasmist.

The gas mist flows out of the main bore and is again mixed with air from the air cleaner. From this stage. the correct air-fu21 mixture is supplied to the engine.

4)Choke

The choke helps in starting the engine in cold weather.

When the engine is started with the choke valve closed. negative pressure applied to the main nozzle rises. allowing most of fuel to flow through the main nozzle.

-4 mixture with a high gasoline concentration is fed to the engine resulting in easier engine starting.

12-5-2 DISASSEMBLY and ASSEMBLY of CARBURETOR

The most common trouble with the carburstor is failure to provide the correct air-fuel mixture. This is generally caused bl- blockage in the air and fuel channels. at other times it is caused by fuel level fluctuations in the float chamber. In order to maintain the carburetor in normal operating condition. it is vital that the air and t‘uel channels be kept clean. The following descriptions are the procedures for carburetor disassembly and assembly. (See Fig. 12-19.)

1)Throttle mechanism

a)Remove Philips-head screw (77): throttle valve (~8), and pull out the throttle shaft (39).

b)When removing the throttle stop screw. a spring (3 1j will also come off. Be careful when handling the throttle valve to prevent the valve edge from damage.

2)Choke

a)Remove Philips-head screw (12). choke valve (23). and pull out choke shaft (24’).

b)Be sure to keep the notch of the choke valve positioned forward the main air jet side when the choke shaft is installed.

3)Pilot jet nozzle

a)Remove pilot jet nozzle (?I ). When removin,0. use a proper tool so that the nozzle will not be damaged.

b)Firmly secure the jet nozzle when the carburetor is assembled. Otherwise, fuel will leak from the nozzle and causeengine trouble.

4)Main jet nozzle

a)Remove bolt (15). and float chamber bodl- ( 13).

b)Remove main jet nozzle ( 19) from carburetor bodk (9j.

c)Firmly secure the main jet nozzle when assembling. Othzrwise. air-fuel mixture will become excessiveIFrich and the engine will not operate properly.

d)Torque for bolt (15) is 70 kg-cm.

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Contents Model Contents Diagram Maintenance TroubleshootingAdjustment Wiring Criteria ForModel SpecificationsR600 Performance Curves AC Output1w1 Current a Features Serial and Specification Number Location Precautions for Exhaust Gases SAFETY- PrecautionsFire Prevention Component Identification \*’ z Fler Capblretor Condenser GeneratorRectifier Engine Exhaust FAN Cooling System AIR CleanerLubrication System Description of Main Components Operation Electronic Ignition System Solid State Ignition System2GENERATOR Operation Voltage Fluctuations Under Load=w= DC OutputOperational Limits of the Generator AC OutputLamps Example 40 + 0.7 = 57WUsed Example EtcMeasured value WhereDC Output Wire Length Simultaneous USE the AC/DC OutputMeasuring Procedures Meters Voltmeters10-l-2 Ammeter 10-l-3 Frequency MeterCircuit tester is used for measuring resistances and others Use the contact-less tl pe tachometer10-l-4 Circuit Tester 10-l-5 Megger TesterMeasuring AC Output Measuring DC OutputMeasuring Resistance1O-4-2 Rotor StatorControl Panel Functional Check of Each Component Pilot LightAC Receptacles DC TerminalsCircuit Breaker Dark Blue Yellow RED Black Brown WhiteStator FL? l-7 Resistance value Ignition CoilLocation 61’1 Rectifier CondenserRed Preparation and Precautions Special Tools for Disassembly and AssemblyDescription Tool NoSide cover Lj and Rj ’ Choke cab12 Fuel lineSet the engine control to Stop Remove the screw fromEngine control switch Remove two M5 flange boltsClamping the front cover Bracket together. and then12 Bas2 platz Recoil starter Starter pullek Rsmove four 5115x 10 bolts from under the base platePlus screw See -SVoltage power cable Front housing Remove the front Housing CenterAir cleaner Spark plug in advanceFlange of the crankcase Head coverRemove the head cover Qlinder Baffle Remove the M6 bolt fromCamshaft Pull out the camshaft from PistonMounting Direc Driver Gently strike the main bearingAssembly Procedure Precautions in AssemblyAssembly Sequence and Precautions Governor Shaft CrankshaftInside and outslde diameter Tolerances of Newly Installed PartsThat the ring can be slided into its groove Installing the Crankcase Installing the Connecting ROD Major END CAPSTD Equipment Spare Parts Guide OIL SciraperInstall the tappets. and then the camshaft Installing Main Bearing CoverValve face LooseTappet Adjustment Installing the Cylinder HeadInstalling the Spark Plug Installing the Cylinder BaffleInstalling the Head Cover IingConnect the ground cord to the rear housing. using Installing the Base Frame Installing MufflerInstalling the Choke Cable Installing the Fuel LineInstalling the Fuel Tank Handle Installing the Rear CoverConnecting the Couplers Together Caburetor Schematic diagram of the fuel systemFunction and Components See Fig Disassembly and Assembly of Carburetor Page Diagnosis by the Customer Troubleshooting Diag DiagnosisDiagnosis by the Shop Coil is GaPP0ssil1lc OUI Exam 3RlSyl~lploms Diac Fuel VillVC Mcwrc MACIiic Kerr1cdies ExamLSlulor.-IX1coil Wire Hrokcn OI Diode Tllilill coil SlillOr MCiISIJIC tileTo Diag ’hcckTllilll TiicKeplilCe No1 illcreils~ Ijxam ’XAMISM K4.A NGK ’XAM 5 IappCl ClCilr- ilncc Trutpu1Tappet Ckiir Criteria Table for Adjustment Tappet EratorItems Adjustment Criteria Limit Description Wiring Diagram 1lOV White Green Red =.I Blue 22OV.50 Gray 220VPink 230V 240VMaintenance Check the switch of engine and tlexible shaft Overhaul the engine for cleaning. adjustmentDrain the oil from Us2 of contaminated oil will subject parts toGenerator America
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