Subaru Robin Power Products EY20V 6INTAKE and Exhaust Valves, Valve and Valve Guide Clearance

Page 27

5-4-6INTAKE and EXHAUST VALVES

Remove carbon and gum deposite from the valves, valve seats, intake and exhaust ports and valve guides.

Note: I f the valve faceis dinted or warped, replace the valves with new ones.

Note: if there is an excessive clearancebetween the valve guide andvalve stem, replace the valve guide with a spare. For replacing, pull outthe valveguide, using the valve guide puller and bolts as shown in Fig. 31, and press-fita new valve guide into place.

3O53'	1	Puller

			Fig- 31
		Guide	VALVE and VALVE GUIDE CLEARANCE
			EY15V	EYZOV
		I
A-VALVE FACE ANGLE			45"
I 8-SEAT ANGLE		I	45"
C-GUIDEINSIDE DIA.	I		6.5 dia.	+0.022
C-GUIDEINSIDE DIA.			6.5 dia.	0
		INTAKE		-0.025
		INTAKE	6.5 dia. -o.040
D - VALVE STEM OUTSIDE DIA	La			-0.056
				-0.056
			6.5 dia. -o.078
MAXIMUM ALLOWABLE			0.025L -0.062L
CLEARANCE BETWEEN C & D		EXHAUST	0.056L -0.1OOL
			0.056L -0.1OOL

L: LOOSE

Fig. 32

I

I

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Image 27

Contents Page Wisconsin Robin Side ValveContents Basic Theory ofT .I.C Model SPEC1FICATIONSContinuous Rated Output PerformanceFeatures Crankshaft CYLINDER,CRANKCASEConnecting ROD and Piston Camshaft6VALVEARRANGEMENT Cylinderhead CoolingLubrication 112CARBURETOR 111IGNITIONModel EY15V Sectional View of EngineAir Cleaner Muffler Cover Model EY20V Model EY20V Special Tools Preparations and SuggestionsApplicalbeShape Model Order 3HOW to DisassembleTool Order Exhaust valve Main bearing cover Procedures Remarks OrderProcedures Crankshaft Precaution in reassembling~Sequesnceand precautionsin reassembling MOW to ReassembleEY15V Eyzov Dimensions of Crankshaft PinPeriphery.I Y20 5 Mainbearing Cover Valve and Valve Guide Clearance 6INTAKE and Exhaust Valves7TAPPET Adjustment Kg-cm ’ 5-4-8CYLINDER HeadIntake Manifold 1FUEL Tank Bracket1 7 Recoil Starter 14AIRCLEANERMagneto BreakerpointadjustmentTo 6-3TIMING Adjustment MagnetoTiming Adjustment See Figs ,43 C. Transistorignitioncircuit MagnetotroubleshootingSpark Testing Solidstate IgnitionGovernoradjustment Point where the governorspring is to be hookedDiscrimination accordingto the dimensions Page 1 Float System CarburetorDisassembly and Reassembly 2 Pilotsystem1 Throttle System Float System BREAK-IN Operation of Reassembledengine Features IO. Robin Solid State Ignition EngineBasic Theory of T.I.C. See Fig 11- 1-2 Compression System 11- 1 Starting Difficulties11- 4 Engine Overheats 11- 1-3ELECTRICAL System11-2ENGINGEMIFIRES 11-3ENGINE StopsEnginebackfires through Carburetor EngineknocksExhaust Gasdischarge InstallationPower Transmission to Drivenmachines VENT1LATIONWiring Breaker Point Ignition TypeSolid State Ignition Type Checks and Corrections Table of Correctionstandards 1.o 10*0.02 #20 220 Every 100 200 Hours Monthly Checks and Maintenance Daily Checks and MaintenanceEvery 20 Hours Checks and Maintenance 15-3EVERY 50 Hours IO Dayschecks and MaintenanceEvery 500 600 Hours Semiannual Checks and Maintenance Every 1000 Hours Yearly Checks and MaintenancePREPARATiON for Longabeyance Page Page Page Page Industrial Engines