Subaru Robin Power Products R1200 Main Bearing Cover, Crankshaft, 4CONNECTING ROD and Piston

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4-2 ENGINE

4-2-l CYLINDER AND CRANKCASE

The cylinder and the crankcase of the engine are of a one-piece aluminum die-cast design. The specific iron cylinder is cast-fitted inside the cylinder. Both the intake and exhaust ports are positioned at the lateral side of the cylinder. These ports are also cast by using a mould with die-cast cores. The crankcase has its joint face located on the generator side, and it is of an assembly structure.

4-2-2 MAIN BEARING COVER

The main bearing cover is alminum die-cast and is mounted on the generator side. By removing it, the interior of the engine can be inspected.

4-2-3 CRANKSHAFT

The crankshaft is constructed of forged carbon steel, and the crankpin is induction-hardened. A crank gear is pressure-fitted on the generator side of the engine.

4-2-4CONNECTING ROD AND PISTON

The connecting rod is made of forged aluminum alloy with both the major and minor ends utilized as bearings. An oil scraper is cast on the major end. The aluminum alloy casting piston has slots on which two compression rings and one oil ring can be assembled.

4-2-5 CAMSHAFT

The camshaft is made of special cast iron and has intake and exhaust valve drive cams, each of which engages with the camgear. An exclusive aluminum alloy is used on each end of the camshaft in the place of bearings. (Ball bearings are not used.)

4-Z-6 VALVE ARRANGEMENT

The intake valve is arranged in the generator side, while the exhaust valve is arranged in the recoil side.

4-2-7 CYLINDER HEAD

The cylinder head is die-cast aluminum and has a Ricardo type combustion chamber featuring greater volume capacity for improved combustion efficiency. For easier ignition plug mainte- nance the cylinder head is positioned vertically.

4-2-8 GOVERNOR

The centrifugal weight governor ensures constant engine speed, regardless of load fluctuations (the governor is mechanically linked to the governor drive gear).

4-2-9 COOLING SYSTEM

The cooling system with a cooling fan, which also functions as a flywheel, compulsorily sends cooling air to the cylinder and the cylinder head and cools them. This forced air cooling system has a baffle plate and a head cover.

4-Z-10LUBRICATION SYSTEM

The moving and sliding parts inside the engine are lubricated with the oil scraper fitted on the connecting rod by scraping and splashing oil in the crankcase.

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Contents Rozh -J &ii Foreword Contents Assembly Items SpecificationsAC Output Power FactorRated 800 W Frequency 50 Hz Voltage 110 Output Max Output MaxUnder no load is approximately from 18V up to Frequency 60 Hz Voltage 12ov DC OutputFeatures CHOKE-RUN-STOP Component IdentificationFunction of Each Component L-5 Main Bearing Cover 4CONNECTING ROD and PistonCrankshaft CamshaftCarburetor AIR CleanerDescription of Main Operations ‘CCVoltage Regulation Under Load Fis Output Waveform Current @ Curr&t @ Operational Limits of the Generator Load Electric Battery Capacity Wire Length II ’ Mj 1 mI Measuring ProceduresPage To Measure Insulation Resist Control Panel L a Functional Check of Each ComponentOne section, replace with Assy 83 AVR Windings, or peripheral temperature Resistance Cleaning of Slip RingValue El 10.7J-z Exciting coil At rated rpmDisassembly and Assembly Driver Precautions ToolsPrecautions Nection Description I2 Remove the front cover SequenceI Part to remove j IFront cover DescriptionBy unscrewing three M5 x 8 screwsPart to Sequencej remOve Description PrecautionsBe careful not to Damage the fuel PipeLpanner Part to Sequence, removeSpanner @ Driver Remove the connector Assembling, be Remove $Ez End cover Description PrecautionsThat 1wiring Part toSee Fig. g-3-10 RemOve ’Rear ‘bracket DescriptionPull away the stator cover SequenceI Rpearfito~~ Description’ plastic hammer Siw‘ Part to / Sequencej remove ’ JFront Ibracket Description Necessary Precautions13 m/m box Spanner RemOve I10 m/m box spanner DescriptionPrecautions Necessary Tools Blower i 1 1housingNecessary Precautions . tools @ Driver One M6 x 12 bolt Precautions Bolt has only to be loosenedBrace nuts 112m/m box ’spanner 10 m/m box jspanner ’Governor Remove the governor lever j LeverRemove the starting pully 26 i &cocci*nIgnition coil from Crank case by takingNotch Spanner 1spring retainer’s Pull out the intake valve and the exhaust valveFront and hook ’ the minus driver RetainerCamshaft Description ISequenceI Part toCrankcase Tappets to distin Guish them from one Remove the crankshaft Be careful not to Be careful not to open the joint too wide, or it will breakAssembly Procedure WTolerances of new installed parts Piston and Piston Ring Connecting rod is joined to the piston with the piston pinTappets and Camshaft Connecting RODIntake Valve and Exhaust Valve =53 WV&e h valve guide clearanceBreather Plate and Tappet Cover Cylinder Head Tappet AdjustmentIgnition COIL, Exciting COIL, Flywheel and Starting Pulley Ignition PlugGovernor Lever Speed Control Muffler and Muffler Cover Nut1’7 Recoil Startor Head Cover and Blower HousingFront Bracket Rear Bracket and Stator Brash Holder Bracket Cover Page Front Cover and Element Cover Fuel Pipe ConnectionConnection of Coupler and Plug Secure the side cover with four M 5 x 8 screws Carburetor Schematic Diagram of the Fuel System By-Pass Choke Disassembly and Assembly of Carburetor 184 Safety Precautions Troubleshooting Starting failur Cock is closed Pzlzq L1Ill IISymptoms AIgnition coil ’ \ r?J Hanging posi- tion is not normal Abration 7Symptoms 0Governor system III Seat Case Case there Abnormal Operation Is too much Pour Lubri Been changed Replace Periodically 1Symptoms Voltemeter Stator sub-coil Symptoms LNo DC voltage is output Voltag,eistoo high QParts LSymptoms Symptoms Voltage Is abnormally low Parts Criteria Table For AdjustmentUel con Limit Items Adjustment Criteira Description Tools LT-Tw Wiring DiagramMaintenance Checks and Maintenance for Every 200 Hours Every Month Page Page Issue EMD-GS0095

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