Robin DY27-2 workshop service and parts manual

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ROBIN AMERICA, INC. ROBIN TO WISCONSIN ROBIN ENGINE MODEL CROSS REFERENCE LIST ROBIN EY 08 EY15 EY 15V EY20 EY20V EY23 EY28 EY35 EY40 EY45V EY2 1 EY44 EY 18-3 EY25 EY27 EH11 EH12 EHl5 EHI 7 EH2 1 EH25 EH30 EH30V EH34 EH34V EH43 V EC13V DY23 DY27 DY30 DY3 5 DY4 1 WISCONSIN ROBIN SIDE VALVE W 1-080 W1-145 W1-145V W1-185 W1-185V Wl-230 W 1-280 W 1-340 W 1-390 W 1 -450V EY21W EY44W EY 18-3W EY25W EY27W OVERHEAD VALVE WOI-115 WOI-120 WO1-150 WOI-170 wo1-210 WO1-250 WO 1-300 WO 1 -300v WO1-340 WO 1 -340V WO1-430V TWO CYCLE WT1-125V DIESEL WRD 1-230 WRD 1-270 WRD 1-300 WRD1-350 WRD1-410 Downloaded from www.Manualslib.com manuals search engine

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1. SPECIFICATIONS Model DY27-2 DY23-2B DY23-2D Type Air-Cooled. 4-cycle, Overhead Valve, Single vertical cylinder, Diesel engine I Bore X Stroke Piston Displacement 70 X 60 rnrn ( 2.76 X 2.36 in. ) 230 cc ( 14.04 cu.in. ) 75 X 60 mm ( 2.95 X 2.36 in. 1 265 cc ( 16.1 1 cain. ) Compression Ratio output HP/ rpm ( 3.5 / 3600 ) DIN6270NB (Warnin”) 4.8 / 3600 output HP/ rpm 4.2 / 3600 DIN6270NA (KW-min”) ( 7.7/ 2200 ) DlN6270NB ( ft.lbs/ rpm 1 1.07/ 2200 Torque kg - m / rpm ( 3.1 / 3600 ) 21 4.8 / 1800 ( 17.W 1200 1 ( 8.9/ 2400 1 (15.4/11001 2.46/ 1200 1.23 / 2400 2.14/ 1100 ( 3.7/ 1800 1 ( 3.7 / 3600 1 (3.1 /1800 1 5.0 / 1 800 5.0 / 3600 4.2 / 1800 ( 4.0/ 1800 1 ( 4.0/ 3600 1 ( 3.5/ 1800 1 5.5 / 1 800 5.5 / 3600 Rotation I Counterclockwise as viewd from PTO shaft side Cool in g I Forced air cooling Lubrication I Forced oil lubrication Lubricant Trochoid gear pump Oil Pump Diesel engine oil. service rank CC or CD Automotive diesel fuel Fuel ZEXEL DLLAI 50PN052 Injection Nozzle ZEXEL PFRIMD55 / 2NP1 Fuel Injection Pump Fuel Feed I Gravity type Fuel Tank Capacity I 3.2 liters ( 0.84 U.S.gal. 1 Combustion System Centrifugal flyweight type Governor System Direct injection type Lighting Capacity 1 2V- 39W/ 3000 12V-43W/ 3600 12V - 39W / 3000 12V - 43W / 3600 Starting System Recoil starter ( Electric starter as option ) Dry Weight 30 kg I (63.9 Ibs.) (65.0 Ibs.) (65.0 lbs.) (66.1 Ibs.) Dimension LXWXH 329 x 357 x 402 mm (1 2.95 x 14.06 x 15.82 in.) 339 x 357 x 402 mm (13.35 x 14.06 x 15.82 in.) Specifications are subject to change without notice. -1- Downloaded from www.Manualslib.com manuals search engine

2- 1 MAXIMUM OUTPUT The maximum output of an engine is the output power of the engine operating with its throttle valve fully open after it has been broken in properly. Therefore, a brand-new engine or an engine which has not been broken in properly may not produce the maximum output. 2-2 CONTINUOUS RATED OUTPUT The continuous rated output of an engine is the output power of the engine running at the rated engine speed controlled by its governor system. The operation of the engine at the continuousratedoutput is most favorable from the view point of engine life and fuel economy. It is recommended, therefore, that the- equipment driven by the engine to be designed to require the engine power less than its continuous rated output. 2-3 MAXIMUM TORQUE The maximum torque indicates the torque at the output shaft when the engine is producing the maximum output. -2- Downloaded from www.Manualslib.com manuals search engine

2 - 4 PERFORMANCE CURVES MODEL DY23-2 HP I 5 4 ! z 23 W v) IT 0 I 2 1 MODEL DY27-2 6 HP I 5 4 9 5 P 0-3 W v) I1I 2 1 \ TORQUE (NB) kg - m 1.2 (2.4) 1.1 (2.2) 1 .o (2.0) i 3.9 (1.8) 2 c1: I- O W g/HP-h 240 220 y 200 g z 0 I- FUEL CONSUMPTION RATIO (NB) \ I I L L I & - 1500 2000 2500 3000 3500 4/00 22 (750) (1000) (1250) (1500) (1750) (2000) REVOLUTION "----+ r. p. rn. ( 1 for B type (750) (1000) (1250) (1500) (1 750) (21 1500 2000 2500 3000 3500 41 REVOLUTION c r. D. rn. kg- m .3 (2.6) .2 (2.4) .1 (2.2) .o (2.0) Y 2 g/ HP- h h -3- Downloaded from www.Manualslib.com manuals search engine

3. FEATURES 3- 1 ECONOMICAL RUNNING Thedirect injection system using the newlydeveloped micro fuelinjectionpump assures superior combustion efficiency and minimized fuel consumption. 3- 2 EXTREMELYQUIETOPERATION 0 The precisely synchronizedfuel injection and refined combustionchamber allow lower Q Blower housing and cylinder baffle are made from “DUMPING SHEET”, a special 0 Larger super silent muffler and double element air cleaner reduce the exhaust and combustion pressure which results in reduced combustion noise. material for insulating noise and vibration. intake noise. 3- 3 EASY STARTING 8 Light pull recoil starter and centrifugal automatic decompressor allow effortless 0 An auxiliary fuel inlet is provided for easy starting in cold weather. starting similar to a gasoline engine. An air check valve for easy air bleeding from the fuel line. 3- 4 LESS VIBRATION 0 In addition tothe reduced weight of reciprocating parts, a balancer shafthas been a The automatic decompressor prevents shaky vibration at stopping. adopted for extremely smooth running with less vibration. 3- 5 HIGH PERFORMANCE Die-cast cylinder head generates a stableswirl of air-fuel mixture which results in the high output power and an exceptional fuel economy. Its flattorquecharacteristic provides tenacious running from slow speed to high speed. 3- 6 SUPERB RELIABILITY The advanced Robin technology, such as well proven crankcase design, tension bolt system for joiningcylinder and cylinder head, and forced lubricationsystem,forlonger service life under the toughest operating conditions. 3-7 SMALL AND LIGHTWEIGHT The newly developed micro fuel injection pump and crankcase structure originated in the gasoline engine have .minimized the size and weight of the engine. 3-8 WIDE RANGE OF APPLICATIONS Robin’s new air - cooled diesel engine series assures maximum adaptability to any application. 0 Direct outputtype (D type) and reduction type (B type) are available. Selection of P.T.O. shafts for various applications. Variable muffler exhaust direction. 0 Recoil starterand optional electric starter. 0 Strong power from small and lightweight body. Q Lower noise and less vibration. -4- Downloaded from www.Manualslib.com manuals search engine

4. GENERAL DESCRIPTION OF ENGINE CONST 4-1 CYLINDER AND CRANKCASE The cylinder and crankcase are single piece aluminum die casting. The cylinder liner, made of special cast iron, is built into the alminum casting. Thecrankcaseisseparable on the output shaftside,wherethemainbearingcover is attached to it. (See Fig. 1.) 4-2 MAIN BEARING COVER The main bearing cover made of aluminum die casting is built onto the output shaft side of the crankcase so that the inside of theenginecanreadily be checked by simply removing the cover. Itisprovided with a flange and boss for directly mounting machines, such as generators and pumps. Two oil gauges also serving as oil filler caps can be mounted. (See Fig. 2) 4- 3 CRANKSHAFT Crankshaft is made from forged carbon steel and its crankpin and journal are induct ion - hardened. Crankshaft is supported by a ball bearing at flywheel side and a kelmet bearing at P.T.0: side. A passageforlubricating oil is provided through the journal and crankpin to lubricate the large end bearing of connecting rod. Thecrankgearispressure-fitted on the P.T.O. side of thecrankshaft. A balancer gear is also pressure-fitted for the engines with optional balancer. (See Fig. 3.) ~~ FIG. 2 FIG. 3 -5- Downloaded from www.Manualslib.com manuals search engine

4-4 CONNECTING ROD Connecting rod is made from forged aluminum alloy which withstands high combustion pressure and tension under heavy load and high speed operation. Kelmet bearings are provided as large end bearing,whilethematerial of connecting rod itself serves as small end bearing. (See Fig. 4.) 4- 5 PISTON Piston is made from aluminum alloy casting, and it has three grooves for piston rings. On the piston top, a combustion chamber isarrangedwheretheinjectedfuelmixes with air and ignites. The piston profile is so designed as to minimizepistonnoise. (See Fig. 5.) 4-6 PISTON RINGS Piston rings are made from special cast iron. The profile of top ring is barrel face, and that of second ring is taper with under cut. The oil ring is the combination of cutter rings and an expander which is excellent in gas sealing and reducing oil consumption. (See Fig. 5.) 4-7 CYLINDER HEAD Cylinder head is themostimportantpart of the diesel engine.It is made fromone- piece aluminum alloy die cast, in which intake and exhaust ports, rocker arm room, and cooling fins are molded in the most ideal structure for the highest strength and the highest cooling efficiency. High quality heat resistant valve seats are pressure- fitted considering high resistance to abration and corrosion at high temperature. (See Fig. 6.) FIG. 4 TOP RING SECOND RING OIL RING CONNECTING ROD FIG. 5 FIG. 6 , , ,- -6- Downloaded from www.Manualslib.com manuals search engine

Robin DY27-2 workshop service and parts manual

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