Robin America EY44-2 Service Manual
  1. Manuals
  2. Brands
  3. Robin America Manuals
  4. Engine
  5. EY44-2
  6. Service manual
Robin America EY44-2 Service Manual

Robin America EY44-2 Service Manual

Robin industrial engine service manual
Hide thumbs
Table of Contents

Advertisement

Quick Links

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the EY44-2 and is the answer not in the manual?

Questions and answers

Related Manuals for Robin America EY44-2

Summary of Contents for Robin America EY44-2

  • Page 2 ROBIN AMERICA, INC. ROBIN TO WISCONSIN ROBIN ENGINE MODEL CROSS REFERENCE LIST ROBIN SIDE VALVE EY 08 EY15 EY 15V EY20 EY20V EY23 EY28 EY3 5 EY40 EY45V EY2 1 EY44 EY 18-3 EY25 EY27 EH11 EH12 EH15 EH17 EH2 1 EH25 EH3 0 EH30V...

  • Page 3: Table Of Contents

    CONTENTS Section Title ..........SPECIFICATIONS .
  • Page 4 ..........MAGNETO .

  • Page 6: Performance

    (23J11.5-- 2000 3500 (1OOO) is such power as developed by that engine when running at an optimum EY33-2 or EY44-2 engine, CONSUMPTION RATIO AT MAX. OUTPUT PERFORMANCE CURVE Model EY33-2 RECOMMENDED OPERATING SPEED RANG M A X . TORQUE...

  • Page 7: Features

    (1000) of governor guarantees stable operation under various load conditions over a wide PERFORMANCE CURVE Model EY44-2 R E C O M M E N D E D O P E R A T I N G SPE 2500 3000...

  • Page 8: General Description Of Engine Construction

    FLYWHEEL(COOLI~G FAN) LIGHTING C O I L CRANKCASE...
  • Page 9 - 5 -...

  • Page 10: Crankcase

    The EY44-2 piston has an offset structure at the piston pin center so as to reduce striking sound of piston. 4-6 CAMSHAFT The carbon steel forging camshaft incorporates integral intake and exhaust cams plus a force-fit cam gear.

  • Page 11: Governor

    4-10 GOVERNOR The centrifugal flyweight type governor assures constant-speed operation at selected speed, irrespective of load fluctuations. 4-11 COOLING The cooling fan which also serves as a flywheel forcily feeds cooling air to the cylinder head with the aid of cylinder baffles and head cover.

  • Page 12: Installation

    5. INSTALLATION Since the installation method affects the costs of engine, the following contents should be carefully examined before installing your engine. For details, refer to the separate “SALES MANUAL”-Engineering Information-. 5-1 MOUNTING When installing the engine, its mounting position, coupling conditions with operating machines, and anchoring or supporting methods must be carefully examined.

  • Page 13: Wiring

    5-6 WIRING CB104 female terminal male terminal CA104 JIS LA 104 The dotted parts are " " " 5-6-1 ROPE STARTING ENGINE SPARK PLUG 5-6-2 ENGINE with STARTING MOTOR LA1 08 plate terminal supplied with the engine. MAGNETO 5-6-1 Fig. MAGNETO _ "...

  • Page 14: Disassembly And Reassembly

    6. DISASSEMBLY and REASSEMBLY PREPARATIONS and SUGGESTIONS 1 ) When disassembling engine, carefully note mounting positions and methods of respective parts in order reassemble them correctly. Tag parts, if there is a possibility of confusion. 2 ) Prepare several boxes to keep parts belonging to respective groups together. 3 ) In order to prevent missing or misplacing, group related parts together, tentatively assembling them immediately after disassembling each sub-assembly.

  • Page 15: Disassembly And Reassembly Procedures

    (EY33-2: 6mm nut ADJUSTMENT” section. -1 1- 209 9901 0 07 (Y790-350) 001 65085 209 9901 1 07 (Y790-282) 9901 2 07 (H640-118) is completely removed. After oil mixed at a ratio 2 , EY44-2: 8mm nut of 4:1), before...

  • Page 16: Starting Pulley

    6-3-6 STARTING PULLEY FLYWHEEL Remove 3 pieces mounting bolts to detach starting pulley from flywheel. Remove flywheel from crankshaft. Insert a socket wrench box wrench into an nut, and give the wrench a sharp blow with a soft hammer. Remove nut and spring washer. Attach flywheel puller to flywheel as shown in Fig.

  • Page 17: Tappet Clearance

    In reassembly; 1) Clean carbon and gum deposits from the Replace valves, if badly burned, pitted or warped. 3 ) Correct the valve seat by using 1.2-1 S m m inch) in width. (.04-.05 Cylinder block should be replaced clearance specifications and proper assembly. 5 ) After correcting valve seats, lap valves in place until a uniform ring valve.

  • Page 18: Cylinder Block

    6) ADJUSTING TAPPET CLEARANCE (Fig. 6-3-5) Rotate crankshaft until tappet position, hold valve down and insert feeler gauge between valve and tappet stem. The clearance for both intake and exhaust, with engine cold. 0.13-0.17mm (0.0051”to 0.0067“) If clearance is less than specified, slightly grind valve stem and measure it again.

  • Page 19: Camshaft And Tappet

    In reassembly; 1) When reassembling main bearing cover, assemble governor lever shaft and governor arm before reinstalling them into crankcase. NOTE: If replacement of oil seal is required, force-fit new oil seal before reassembly. 2) When reassembling main bearing cover, apply thin film of oil o n main bearing cover face.
  • Page 20 Measure the cfearance between cylinder and piston on thrust surface at skirt before assembly. If worn out severer than specified, replace Since the piston pin center of piston for EY44-2 is offset from the center of piston by about set piston to the match mark scribed at the top piston.
  • Page 21 Check connecting rod moves smoothly after reassembly. Clamping torque of connecting rod cap is 250-300 kg-cm (crankshaft pin Dia.) (crankshaft pin Width) PISTON TO CYLINDER AT PISTON SKIRT THRUST FACE (CLEALANCE) PISTON RING GAP (CLEARANCE) PISTON RING SIDE CLEARNACE IN GROOVES (CLEARANCE) CONNECTING ROD TO CRANK PIN (CLEARANCE)

  • Page 22: Magneto

    7 . MAGNETO M A G N E T O In Models EY33-2 and EY44-2, ignition spark is furnished by a magneto. The magneto is composed of the flywheel, ignition coil, lighting (charging) coil, breaker assembly (including condenser). The flywheel is mounted crankshaft, while ignition coil, lighting coil, and breaker assembly are directly assembled crankcase.

  • Page 23: Magneto Service Instructions

    For timing adjustment, the following alighment marks are provided: D mark at lower left crankcase type: mark and slit on flywheel circumference B type: B mark at upper left crankcase mark and slit on flywheel circumference. Fig. 7-3- For timing adjustment, the following procedures using a timing light: (See Fig- Disconnect the stop button lead wires and the coil primary wire.
  • Page 24 *CHECKING IGNITION SPARK Remove spark plug from cylinder head and place on cylinder head fin after connecting ignition cable to it. Crank engine several times by starting pulley, and check if plug gap spark is strong or weak. If spark is weak, check it according to steps 1 ) - 3 ) above. Correct plug 0.6 to 0.7mm (.0236"".0276").

  • Page 25: Governor Adjustment

    8. GOVERNOR ADJUSTMENT EY33-2 and EY44-2 employ a centrifugal flyweight type governor which mounted on a cam gear to automatically regulate throttie valve of carburetor by mean of a lever, so that the engine speed is kept constant irrespective fluctuations.

  • Page 26: Carburetor

    9. CARBURETOR 9-1 OPERATION CONSTRUCTION (see FLOAT SYSTEM 9-1-1 The float chamber is located just below carburetor main body and serves to maint ain the fuel joint action of float and needle valve valve, which is kept open while the fuel level is low, but closed when the fuel level reaches a predetermined level c o w i n g the float to move up.

  • Page 27: Main System

    9-1-2 PILOT SYSTEM This pilot system feeds fuel to engine during idle and low speed operation. (MI) The fuel fed through main jet is measured b y pilot jet pilot screw, and then fed to engine through pilot outlet (PO) and bypass (BP). The fuel is mainly fed from pilot outlet (PO) during idling.

  • Page 28: Adjustment

    (20). rich, and an engine disorder may result. US€ COMPRESSED A I R WITHOUT FAIL. by 1-1/2 turn (EY33-2) or 1-3/4 turn (EY44-2) after fully closing it of 1,200rpm is obtained. If this speed exceeds -24-...

  • Page 29: Run-In Operation Of Engine After Reassembly

    The recommended run-in schedule is as tabulated below. EY33-2 No load No load No load 3.25 HP LOAD SPEED EY44-2 No load 2500 r.p.m. No load r.p.m. r.p.m. No load 3600 r.p.m.

  • Page 30: Trouble Shooting

    1.1. TROUBLE SHOOTING a satisfactory starting and running conditions of a gasoling engine, the following three requirements The cylinder filled with a proper fuel-air mixture. An appropriate compression in the cylinder. Good spark at correct time to ignite the mixture. If all three requirements are not met simultaneously, an engine can not as heavy load at starting and too long exhaust pipe causing high back pressure, which contribute to hard starting.

  • Page 31: Electric System

    11-1-3 ELECTRIC SYSTEM When there is no spark, the following must be checked. Disconnected cable leading to ignition coil, spark plug or contact breaker. Broken ignition coil winding, causing short circuit. or oil soaked spark plug cable. Dirty or wet spark plug. Incorrect spark plug electrode gap.

  • Page 32: Engine Knocks

    Restricked exhaust gas outlet. Carbon deposit in combustion space. Engine detonating due to low octane gasoline with heavy load at low speed. 11-5 ENGINE KNOCKS Gasoline of poor quality or low octane rating. 2 ) Engine operating under heavy load at low speed. Carbon or lead deposits in cylinder head.

  • Page 33: Checks And Corrections

    12. CHECKS and CORRECTIONS After dismantling and cleaning the engine parts, check them, and table. The correction table applies whenever the engines are repaired. Its contents should be thoroughly understood who undertake the repairing. Its specifications must be abided by to effect correct maintenance. Below, terms employed in the correction table are explained.

  • Page 34: Correction Table

    CORRECTION TABLE ENGINE MODEL EY33-2 Flatness of cylinder head EY44-2 EY33-2 Bore EY44-2 EY33-2 Roundness EY44-2 EY33-2 Cylindricity EY44-2 EY 33-2 Valve seat contact width EY44-2 EY33-2 Valve guide I.D. EY44-2 EY33-2 O.D. at skirt, in thrust direction (inch. over size)
  • Page 35 ENGINE ITEM MODEL EY33-2 Piston pin O.D. EY44-2 E Y 33-2 Large end I.D. EY44-2 Clearance between EY 33-2 rand large end I.D. and crankpin E Y 44-2 E Y 33-2 Small end I.D. EY 44-2 Clearance between EY 33-2 small end I.D.
  • Page 36 ENGINE ITEM MODEL EY44-2 Journal O.D. EY33-2 Free length EY44-2 EU33--2 Squarences EY44-2 Valve stem O.D. EY33-2 Clearance between stem and guide EY44-2 EY33-2 Tappet clearance EY44-2 EY33-2 Clearance between groove and retainer EY44-2 EY33-2 Stem end length EY44-2 EY44-2...
  • Page 37 MODEL I T E M EY 33-2 Max. Output EY44-2 EY33-2 Continuous Rated o u t p u t EY 44-2 MODEL ITEM EY33-2 Fuel Consumption EY 44-2 MODEL ITEM EY33-2 L u b r i c ~ ~ t...
  • Page 38 ITEM MODEL EY33-2 Min. accelerating revolution EY44-2 ITEM MODEL EY33-2 Cylinder head clamp nuts EY 44-2 EY33-2 Connecting b o l t s EY44-2 EY 33-2 Magneto clamp nuts EY44-2 EY 33-2 Main bearing cover bolts EY 44-2 EY33-2 Spark plug...

  • Page 39: Maintenance And Storing

    13. MAINTENANCE and STORING The following maintenance jobs apply when the engine maintenance intervals are by means guarantees for maintenance free operations during these intervals. For example, if the engine is operated in extremely dusty conditions, the air cleaner should be cleaned every day, instead of every hours.

  • Page 40: Every 500-600 Hours (Semianual) Checks And Maintenance

    13-5 EVERY 500 600 HOURS (SEMIANUAL) CHECKS Checks and maintenance Reasons for requiring them Remove cylinder head and remove carbon deposit. Disassemble and clean carburetor. 13-6 EVERY 1000 HOURS (YEARLY) CHECKS Checks maintenance Perform overhauls, clean correct or replace parts. Change piston rings 13-7 PREPARATION for LONG ABEYANCE Perform the above 13-1 and 13-2 maintenance jobs.
  • Page 43 Industrial Engines...

This manual is also suitable for:

Ey33-2

Table of Contents