Cylinder,Crankcase, Crankshaft | Subaru Robin Power Products EY15V

4. GENERAL DESCRIPTION of ENGINECONSTRUCTION

4 - 1 CYLINDER,CRANKCASE

The cylinderand crankcase are single piece alumi- num die casting. The cylinder liner, made of special cast iron, is built into the alminum casting. The in-

take and exhaustports arelocatedonone side of the cylinder, and arealso inserted into thecasting. The crankcase is separable on the output shaftside, where the main bearing cover is attached to it.

(See Fig. I .)

4 - 2 MAINBEARINGCOVER

Fig. 1

The main bearing cover made of aluminum die casting is built onto the output shaft side of the crankcase so that the inside of the enginecan readily be checked by simply removing the cover. It is provided with a flange and boss for directly mounting on themachines.

Two oil drains are alsoavailable. (See Fig. 2 and Fig. 3.)

Oil

r

Governor Gear

Fig. 2

4-3 CRANKSHAFT

Thecrankshaft is forged of carbonsteel,and the crankpin is induction-hardened. It has a crank gear and a oil scraper press-fitted on the output end.

(See Fig. 4.)

Fig. 3

Induction Hardening

/(Portion of Crankpin)

Crank Gear /	\ O;IScraper
(Press-fit)	(Press-fit)
	(Press-fit)

Fig. 4

-4 -

Image 8

Subaru Robin Power Products EY15V, EY20V manual Cylinder,Crankcase, Crankshaft

Contents

Page Side Valve Wisconsin Robin Contents Basic Theory ofT .I.C SPEC1FICATIONS Model Performance Continuous Rated Output Features CYLINDER,CRANKCASE Crankshaft 6VALVEARRANGEMENT Connecting ROD and PistonCamshaft Lubrication CylinderheadCooling 111IGNITION 112CARBURETOR Sectional View of Engine Model EY15V Air Cleaner Muffler Cover Model EY20V Model EY20V Preparations and Suggestions Special Tools ApplicalbeShape Model 3HOW to Disassemble Order Tool Order Exhaust valve Main bearing cover Procedures Remarks OrderProcedures Precaution in reassembling ~Sequesnceand precautionsin reassemblingMOW to Reassemble Crankshaft Dimensions of Crankshaft Pin EY15V Eyzov Periphery.I Y20 5 Mainbearing Cover 6INTAKE and Exhaust Valves Valve and Valve Guide Clearance 7TAPPET Adjustment ’ 5-4-8CYLINDER Head Kg-cm 1FUEL Tank Bracket Intake Manifold 14AIRCLEANER 1 7 Recoil Starter Breakerpointadjustment To 6-3TIMING AdjustmentMagneto Magneto Timing Adjustment See Figs ,43 Magnetotroubleshooting Spark TestingSolidstate Ignition C. Transistorignitioncircuit Discrimination accordingto the dimensions GovernoradjustmentPoint where the governorspring is to be hooked Page Carburetor 1 Float System 1 Throttle System Disassembly and Reassembly2 Pilotsystem Float System BREAK-IN Operation of Reassembledengine Basic Theory of T.I.C. See Fig FeaturesIO. Robin Solid State Ignition Engine 11- 1 Starting Difficulties 11- 1-2 Compression System 11- 1-3ELECTRICAL System 11-2ENGINGEMIFIRES11-3ENGINE Stops 11- 4 Engine Overheats Engineknocks Enginebackfires through Carburetor Installation Power Transmission to DrivenmachinesVENT1LATION Exhaust Gasdischarge Solid State Ignition Type WiringBreaker Point Ignition Type Checks and Corrections Table of Correctionstandards 1.o 10*0.02 #20 220 Daily Checks and Maintenance Every 20 Hours Checks and Maintenance15-3EVERY 50 Hours IO Dayschecks and Maintenance Every 100 200 Hours Monthly Checks and Maintenance PREPARATiON for Longabeyance Every 500 600 Hours Semiannual Checks and MaintenanceEvery 1000 Hours Yearly Checks and Maintenance Page Page Page Page Industrial Engines