Rato RV170 Service Manual Download Page 57

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3. MAINTENANCE

4-4-9 Crankshaft / Piston

Bolt Torque：12N·m

CONNECTION

Rod Cap

CRANKSHAFT

Reassembly

：

Push in firmly until contact is made

with the rearing surface. Be careful

not to damage the oil seal.

PISTON

SEAL 25×38

BEARING 6205

CRANKCASE

PISTON PIN

PISTON PIN CLIP

Summary of Contents for RV170

Page 1: ...RV160 RV170 SERVICE MANUAL Chongqing Rato Power Co Ltd...

Page 2: ...NTENANCE 12 3 1 Maintenance Schedule 12 3 2 Engine Oil 12 3 3 Air Cleaner 14 3 4 Wash The Strainer 15 3 5 Spark Plug 15 3 6 Valve Clearance Adjustment 16 3 7 Governor 18 4 DISASSEMBLING AND SERVICING...

Page 3: ...line Engine 27 4 4 1Recoil starter fan cover 27 4 4 2 Muffler 30 4 4 3 Fuel Tank 31 4 4 4 Air Cleaner 32 4 4 5 Governor 34 4 4 6 Carburetor 36 4 4 7 Flywheel 41 4 4 8 Cylinder Head Valve 45 4 4 9 Cran...

Page 4: ......

Page 5: ...1 INTRODUCTION 1 1 INTRODUCTION 1 1 Parts Description SPARK PLUG START HANDLE OIL DIPSTICK MUFFLE R AIR CLEANER FUEL TANK COVER...

Page 6: ...h Cooling System Forced Air Ignition System Capacitance Discharge Type or Inductance Discharge Type PTO Shaft Rotation Vertical Shaft Output 1 3 Service Limit RV160 PARTS ITEM STANDARD SERVICE LIMIT E...

Page 7: ...5 512 0 020 0 044 0 050 0 077 0 8 34 0 5 318 5 275 5 562 0 10 0 12 2 0 32 5 Camshaft Cam Height Journal O D IN EX 27 70 27 75 13 966 13 984 27 45 27 50 13 916 Crankcase Cover Camshaft Bracket I D 14 0...

Page 8: ...5 0 15 1 0 1 37 Connecting Rod Small End I D Big End I D Big Oil Clearance Small End Side Clearance 18 005 18 020 30 020 30 033 0 040 0 063 0 1 0 7 18 052 30 066 0 12 1 1 Crankshaft Crankshaft Pin O D...

Page 9: ...r Main Jet Float Height Pilot Screw Opening 65 13 7 2 5 8turns Spark Plug Gap 0 7 0 8 Spark Plug Cap Resistance 3 75 6 25k Ignition Coil Resistance Air Gap Primary coil Secondary coil at flywheel 0 8...

Page 10: ...2 DIMENSION AND TORQUE 6 2 DIMENSION AND TORQUE 2 1 Dimension...

Page 11: ...2 DIMENSION AND TORQUE 7 2 2 The Position Of Installing Hole 2 3 PTO Installing Drawing P1 Shaft P2 Shaft P1 Shaft P2 SEAT FACE SEAT FACE...

Page 12: ...2 DIMENSION AND TORQUE 8 P3 Shaft P26 Shaft P27 Schaft P28 Schaft SEAT FACE SEAT FACE SEAT FACE SEAT FACE...

Page 13: ...2 DIMENSION AND TORQUE 9 P29 Shaft SEAT FACE...

Page 14: ...End Shield Bolt M6 16 10 2 Brake Bolt M6 12 10 2 M6 20 10 2 Flywheel Nut Aluminum M14 1 5 52 4 Flywheel Nut Cast Iron M14 1 5 78 4 Ignition Wire Bolt M6 25 1 0 10 2 Stud M6 86 12 2 M6 88 12 2 Fuel Tan...

Page 15: ...N m Bolt Nut 5mm Bolt Nut 4 5 6 6mm Bolt Nut 8 12 8mm Bolt Nut 18 25 10mm Bolt Nut 29 34 12mm Bolt Nut 49 59 4mm Screw 1 5 2 6 5mm Screw 3 5 5 6mm Screw 7 11 5mm Flange Bolt 3 6 6 9 6mm Screw 7 11 5m...

Page 16: ...djust Cylinder Head Clean Fuel Tank Replace Every three years These items should be serviced by company authorized dealer unless you have the proper tools and mechanically proficient 3 2 Engine Oil En...

Page 17: ...at have been identified as carcinogenic If repeatedly left in contact with the skin for prolonged periods it may cause skin cancer Wash your hands thoroughly with soap and water as soon as possible af...

Page 18: ...ith detergent and dry it Immerse the element into the oil and squeeze the excessive oil The element should be wet but not drop the oil Paper Element Blow the compressed air from the inner side or ligh...

Page 19: ...install the strainer on the fuel tank and connect the fuel tube e Check for leaking 3 5 Spark Plug a Remove the spark plug cap Clear away dirt around the spark plug base b Dismantle the spark plug wit...

Page 20: ...park plug torque value 18 2N m Spark Plug Type F7TC The spark plug must be tightened securely or it may become very hot to damage the engine Only use recommended spark plug or the equivalent Incorrect...

Page 21: ...with feeler d Valve clearance adjustment method Loose the locking nut turn the adjusting nut to get the correct valve clearance Screw down the locking nut Torque value 10N m e Recheck the valve cleara...

Page 22: ...wering serious carbon deposit or burn on the valve surface even valve impacting the piston 3 7 Governor Governor adjustment a Remove the air cleaner b Loosen the nut M6 Be sure that the carburetor thr...

Page 23: ...through Float is damaged or sticking Repair float Fuel supply is normal Fuel is too filthy or deteriorated Replace There is water in fuel Replace Too much fuel in engine Drain extra fuel dry up spark...

Page 24: ...ormal fuel supply system Normal spark plug Piston ring is worn to or even over its wear limit Replace Piston ring is broken Replace Piston ring is sticking Clear up carbon fouling Spark plug is not in...

Page 25: ...and main oil flow hole clogged Clean and blow to get through Fuel cock is clogged up Clean replace damaged part Too much carbon deposit in combusting chamber Clear away Too much car bon fouling in mu...

Page 26: ...electrodes clearance Adjust Something wrong with induced coil and so on Check and replace damaged parts 4 1 4 Unable Igniting TROUBLE CAUSE REMEDY Unable Igniting Fuel Supply System Fuel is finished R...

Page 27: ...or to produce speed high Readjust engine governor Crankshaft main bearing burnt out Replace main bearing 4 1 6 Abnormal Sound TROUBLE CAUSE REMEDY Beating sound Piston piston ring or cylinder is worn...

Page 28: ...ld be familiar with the working principle and structure of the gasoline engine knowing how to make an emergent stop and the operation of all controlling parts Any one without training is forbidden to...

Page 29: ...Inner retainer assembler 5 Diamond lap 45o 6 Diamond lap 32o 7 Flywheel driver 8 Bearing extractor 9 Valve guide reamer Carburetor float level inspection Valve guide removal installation Assembling b...

Page 30: ...26 4 3 Dismounting Chart ENGINE MUFFLER CARBURETOR FLYWHEEL AIR CLEANER SHROUD RECOIL STARTER ENGINE HOUSING...

Page 31: ...ine 4 4 1Recoil starter fan cover Removal Bolt M5 16 ENGINE COVER RECOIL STARTER GRIP FUEL COVER NUT M6 8 CLIP RECOIL STARTER CASE ROPE SHROUD STUD M6 88 RECOIL STARTER SPRING RETURN SPRING DRIVE CAM...

Page 32: ...e hook of the recoil starter spring in the groove of the recoil starter case set the recoil starter spring into the case with counterclockwise rotating starter spring Set the recoil starter spring out...

Page 33: ...NCE 29 Pass the recoil starter rope through the recoil starter case and recoil starter grip and make a figure eight knot at the rope end Pull the recoil starter rope lightly to check the drive cam for...

Page 34: ...ow it with compressed air in cleaning carbon deposits Replace it if the muffler exist in water and is seriously rusted to make noise increasing Don t clean with iron wire or the muffler material out t...

Page 35: ...with lubrication oil and gasoline is required Don t smoke and use fire near the flammable solvent b Clean Installation Check the fuel tube for damage or leak Fill the fuel into the proper container Re...

Page 36: ...ube Check the fuel tank for leak Install the engine housing fuel tank cover recoil starter grip and bolt M5 16 c Notice Check fuel tank cover vent foe blocked Check the fuel strainer for clogged or br...

Page 37: ...eck for deterioration or damage Replace if necessary Pay attention to connect the beveled end smaller to the air cleaner case and other end to the engine Don t wash the foam element with the gasoline...

Page 38: ...TE WASHER 6mm GOVERNOR DRIVEN GEAR Before Installing Check For Wear and damage of the gear WASHER 6mm GOVERNOR HOLDER SHAFT Align The Shaft Groove With The Projection In Case GOVERNOR SLIDER Insert th...

Page 39: ...RETURN SPRING Hook the left end hook into the hole of the throttle valve shaft projection GOVERNOR ASSY NUT M6 FIXING BOLT BOLT M5 16 BOLT M6 28 CHOKE LEVER Hook the left end into upper hole of the c...

Page 40: ...modification is made If a carburetor suitable to high altitude is equipped with engine suitable to a lower altitude the lean air fuel mixture will make engine output power lowering over heat and serio...

Page 41: ...washed parts clean with compression air and don t use cloth and paper against recontaminating Don t use the steel wire and other hard material to open the blocked hole to prevent carburetor performanc...

Page 42: ...ARBURETOR Clean With Compressed Air Before Installation FLOAT After installation check for operation by lightly pushing with a finger FLOAT CHAMBER GASKET FLOAT CHAMBER Install So That The Drain Bolt...

Page 43: ...t and float spring for wear Clean with compressed air before installation Clean with compressed air before installation Clean with compressed air before installation Apply light coat of oil to the O r...

Page 44: ...crew out the specified numbers of the turns Pilot Screw Standard Opening State 2 5 8 turns out c Inspection Float level height Place the carburetor in the position as shown and measure the distance be...

Page 45: ...part of dirt oil grease and other foreign material before installation Be sure that there is no washer and other foreign material on the magnetic part b Set the key in the key groove c Install the fl...

Page 46: ...42 Flywheel aluminum d Apply light coat of the oil to the threads and surface of the nut and install the nut loosely Torque 52N m HOLE HOLE LUG LUG START ER Cup FLYWHEEL CAST IRON IMPELLER FLYWHEEL...

Page 47: ...n coil and flywheel with the feeler c Adjust the clearance of the ignition and flywheel d Adjusting method Loosen the bolt and move the ignition coil up and down for adjusting the clearance then screw...

Page 48: ...side Measure the resistance of the secondary side of the coil with the spark plug cap removed touching one test lead to the high tension cord while touching the other tester lead to the coil s iron c...

Page 49: ...ove the air cleaner Remove the recoil starter and shroud Remove the carburetor and insulator VALVE Head INTAKE Valve EXHAUS T Valve PUSH ROD LIFTER VALVE GUIDE GUIDE Seal SPRING RETAINER VALVE ADJUSTI...

Page 50: ...Measure the cylinder compression after reassembly BOLT Loosen and tighten the bolts in a crisscross pattern in 2 or 3 steps TORQUE 26N m SPARK PLUG GASKET CYLINDER HEAD COVER BOLT Apply oil to thread...

Page 51: ...bon deposits and inspect the valve INTAKE VALVE GUIDE EXHAUST VALVE GUIDE PUSH ROD Reassembly Check both ends for wear and the rod for straightness Be sure the rod ends are firmly seated in the lifter...

Page 52: ...ide hole Do not remove the valve spring retainers while the cylinder head is attached to the cylinder or the valves will drop into the cylinder 2 Inspect service repair Valve stem outside diameter Ins...

Page 53: ...the valve guide and cylinder cover for fastness b Using the valve guide reamer ream the valve guides to remove any carbon deposits before measuring If the valve guide inside diameter is lower than st...

Page 54: ...ht measured from the top of the valve guide to the cylinder cover as shown as fig d After installation inspect the valve guide for damage if damaged please replace Reamer For best results be sure the...

Page 55: ...forming to service limit if conforming to replace the guide and ream the guide refinish the valve when replacing the valve guide Valve seat a Thoroughly clean the combustion chambers and valve seats t...

Page 56: ...any possible burrs at the edges of the seat f After resurfacing seat inspect for even valve seating width Apply colorant to the valve tapered face insert the valve and press it forcefully several time...

Page 57: ...kshaft Piston CONNECTION Rod Cap CRANKSHAFT Reassembly Push in firmly until contact is made with the rearing surface Be careful not to damage the oil seal PISTON SEAL 25 38 7 BEARING 6205 P6 CRANKCASE...

Page 58: ...he second ring top ring with chrome plated After assembly check for smooth movement of the piston ring Stagger the piston ring end gaps 120 apart Reassembly a Piston pin clip Install by setting front...

Page 59: ...umference of a oil seal Drive the oil seal in the cylinder barrel using following tool Tools Driver handle Retainer assembler Apply the lubrication oil on after reassembling e Piston Apply oil to the...

Page 60: ...micrometer if out of the service limit replace it b Piston pin bore to piston clearance Separately measure the piston pin bore I D and O D with inside micrometer and outside micrometer Then calculate...

Page 61: ...ower face Standard Service Limit 0 030 0 065mm 0 15mm e Piston ring end gap Flatly place the piston into the cylinder with pushing the piston head to working position Measure the opening clearance wit...

Page 62: ...18 020mm 18 052mm b Check big end diameter If out of the standard or exceed service limit replace the connecting rod Standard Service Limit 30 020 30 033mm 30 066mm c Connecting rod big end oil clear...

Page 63: ...ce and lifter will be badly rubbed from periodically impacting and easily be damaged So the camshaft shall be wearable and lubrication well Visually inspect camshaft face and camshaft height for damag...

Page 64: ...g clearance of the camshaft journal and camshaft seat or bearing is out of the service limit camshaft rotation precision will lower and contacting with the relative part produce deviation face to make...

Page 65: ...gear is damaged please replace with new one Please replace the gear with a new set to ensure the engaging face completely engage in b Reassembly Oil seal Apply grease to new oil seal around Install th...

Page 66: ...62 c Check Camshaft handle inside diameter Standard Service limit 14 0mm 14 048mm 4 5 Electric Diagrams CRANKCASE COVER...

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