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Camshaft Lobe Specifications

Standard

Service Limit

Intake

1.282 -

1.284”

(32.563-32.603 mm)

1.276”

(32.40 mm)

Exhaust

1.262 -

1.264”

(32.049-32.099 mm)

1.256”

(31.9 mm)

Camshaft Journal OD

Standard

Service Limit

0.6298 -

0.6293”

(15.996-15.984 mm)

0.6266”

(15.916 mm)

Check the camshaft bearing journal for scoring, wear or damage.

NOTE:

Verify that the decompression mechanism moves freely.

Содержание LC1P92F

Страница 1: ...RIDING PRODUCT ENGINE SERVICE MANUAL LC1P92F 452cc RESIDENTIAL PRODUCTS...

Страница 2: ...ontents lists the systems and the related topics covered in this manual An electronic version of this service manual is available on the Toro Dealer Portal We are hopeful that you will find this manua...

Страница 3: ...Chapter 1 General Service Information 1 Chapter 2 Engine Service Maintenance 2 Chapter 3 Engine Disassembly and Service 3 Chapter 4 Electrical 4...

Страница 4: ...NOTES...

Страница 5: ...pter 1 General Service Information Safety 2 Service Rules 3 Engine Model Serial Number Location 3 Engine Fastener Torque Specification 4 General Specifications 5 Engine Specifications 6 Troubleshootin...

Страница 6: ...g Avoid Fires and Explosions Avoid spilling fuel and never smoke while working with any type of fuel or lubricant Wipe up any spilled fuel or oil immediately Never remove the fuel cap or add fuel when...

Страница 7: ...use genuine Toro parts and lubrication products 2 Always install new gaskets O rings and seals when assembling engine 3 Always torque fasteners to specification and in sequence 4 Always lubricate fric...

Страница 8: ...ds 23 ft lbs 31 Nm Rocker Arm Pivot Lock Nut 11 ft lbs 15 Nm Alternator Bolts 7 ft lbs 10 Nm Valve Cover Bolts 7 ft lbs 10 Nm Flywheel Nut 81 ft lbs 110 Nm Ignition Coil Bolts 7 ft lbs 10 Nm Starter M...

Страница 9: ...8 8 1 Lubrication Oil Pump with Oil Filter Starting Electric Rotation Counter Clockwise From P T O Side Ignition System Transistorized Magneto Ignition Air Cleaner Foam and Paper Fuel Type Unleaded G...

Страница 10: ...0 00248 0 04 0 063 mm 0 0047 0 12 mm Big End Side Clearance 0 00079 0 0138 0 02 0 35 mm 0 00157 0 4 mm Crankshaft Crankpin Outside Diameter 1 417 1 4165 35 966 35 981 mm 1 415 35 946 mm Valve Clearanc...

Страница 11: ...ouled Loose or Faulty Air Filter Restriction Air Intake System Leaks Ignition Coil to Flywheel Gap Incorrect Weak No Spark Incorrect Fuel Solenoid Fuel Pump Operation Choke Governor Linkage Operating...

Страница 12: ...8 NOTES...

Страница 13: ...ce Engine Oil Change Procedure 10 Air Cleaner Service 11 Spark Plug Service 12 Valve Clearance Inspection and Adjustment 13 Engine Governor Zero Point Setting 14 Engine Idle Speed Operating RPM Adjust...

Страница 14: ...ckwise until the rubber gasket contacts the filter adapter Tighten the oil filter an additional 1 2 to 3 4 turn 7 Remove the dipstick from the oil fill check tube Add the appropriate amount of approve...

Страница 15: ...the filter tap the dirty paper element on a solid flat surface to remove dust and dirt 8 Inspect the paper element for tears oily film or damage to the rubber seal Replace if necessary 9 Thoroughly c...

Страница 16: ...g boot and thoroughly clean the spark plug area 2 Remove the spark plug from the engine 3 Inspect the spark plug for excessively worn electrodes chips or cracks in the insulator or excessive deposits...

Страница 17: ...nce between the rocker arm and the valve stem with a feeler gauge Intake 0 0039 0 10 mm Exhaust 0 0059 0 15 mm 4 To adjust valve clearance Hold the rocker arm pivot and loosen the pivot lock nut Turn...

Страница 18: ...rottle valve Firmly hold the governor arm in this position 3 Rotate the governor shaft fully clockwise and secure it in this position with a pair of pliers 4 Tighten the governor arm pinch bolt and nu...

Страница 19: ...recommended engine idle speed Engine Idle Speed 1700 2000 RPM Engine Operating RPM Adjustment 1 Properly set the governor zero point as shown in this manual 2 Attached an appropriate tachometer to th...

Страница 20: ...se the fuel filter fuel hose clamps A and slide them away from the filter 3 Remove the fuel filter from the 2 fuel hoses 4 Install new fuel filter and reinstall the fuel hose clamps A Make note of ins...

Страница 21: ...ylinder Head Specifications 23 Valve Stem Valve Guide Specifications 24 Valve Seat Reconditioning 25 Engine Service Lower End 26 34 Crankcase Exploded View and Service Information 26 Crankshaft Piston...

Страница 22: ...ervice Upper End Air Cleaner and Muffler Exploded View Muffler Heat Shield Air Cleaner Retainer Nuts 6 ft lbs 8 Nm Carburetor Mounting Nuts Bolts 7 ft lbs 10 Nm Gasket Spacer Fuel Solenoid Gasket Air...

Страница 23: ...Flywheel and Engine Cover Exploded View 3 Flywheel Nut 81 ft lbs 110 Nm Starter Bolts 20 ft lbs 28 Nm Ignition Coil and Alternator Bolts 7 ft lbs 10 Nm Fan Shroud Bolts 7 ft lbs 10 Nm Alternator Igni...

Страница 24: ...20 Carburetor and Linkage Exploded View Governor Rod Choke Rod Throttle Rod Choke Bell Crank Governor Arm Governor Spring Governor Pinch Bolt Throttle Control Asm...

Страница 25: ...21 Carburetor Exploded View Fuel Solenoid Bowl Float Needle Valve Gasket Gasket Solenoid Screw 3 5 ft lbs 5 Nm Bowl Bolt 6 ft lbs 8 Nm 3...

Страница 26: ...I Rocker Arm Pivot J Rocker Arm K Push Rods L Tappet M Valve Spring Seat B A 7 5 ft lbs 10 Nm C D E F G H Lock Nut 11 ft lbs 15 Nm I J Studs 23 ft lbs 31 Nm K L Cylinder Head Gasket Shield Cylinder He...

Страница 27: ...e Valve Seat Width Specification Standard Service Limit 0 03149 0 0393 0 8 1 0 mm 0 0591 1 5 mm Cylinder Head Warp Inspection Remove carbon deposits from the combustion chamber Clean off any gasket ma...

Страница 28: ...m Valve Guide Inspection Ream the exhaust valve guide to remove any carbon deposits before measuring Valve Guide ID Specification Standard Service Limit 0 2362 0 2604 6 0 6 615 mm 0 2606 6 620 mm Valv...

Страница 29: ...aterial to produce a smooth and concentric seat Follow the valve seat cutter manufacture s instructions Turn the cutter clockwise never counterclockwise Continue to turn the cutter as you lift it from...

Страница 30: ...Baffle Plate Q Rubber Oil Deflector R Oil Filter Asm S Governor Asm T Gasket U Oil Filter Adaptor V Bolt and Sealing Washer W Oil Seal X Oil Drain Valve Y Oil Pump Asm A B C D E F G H I J K L M N O M...

Страница 31: ...haft Piston Exploded View and Service Info Governor Exploded View Piston Asm Connecting Rod Connecting Rod Bolts 12 ft lbs 16 Nm Bearing Crankshaft Key Governor Gear Shaft Washer Pin Slider Spool Weig...

Страница 32: ...the piston ring gap as shown Top Ring Second Ring Oil Ring Piston Mark Top Ring Second Ring Oil Ring Check refer to Piston Pin Piston Pin Circlip Install the circlip gap in the 12 00 Position circlip...

Страница 33: ...d camshaft timing marks and install camshaft 3 Align the left balance shaft timing marks and install the left balance shaft 4 Align the right balance shaft timing marks and install the right balance s...

Страница 34: ...vice Limit 0 7871 0 7873 19 992 19 998 mm 0 7834 19 9 mm Cylinder Taper and Out of Round Inspect cylinder for taper and out of round with a bore gauge Measure in two different directions front to back...

Страница 35: ...3 621 91 96 91 975 mm 3 6196 91 940 mm Piston to Cylinder Clearance Specification Standard Service Limit 0 00098 0 0017 0 025 0 045 mm 0 0032 0 081 mm Piston Ring to Groove Clearance Standard Service...

Страница 36: ...0 35 mm Use the piston to position the rings squarely 1 down from the top of the cylinder Connecting Rod Small End ID Standard Service Limit 0 79 0 788 20 07 20 018 mm 0 7881 20 02 mm Connecting Rod B...

Страница 37: ...79 0 0138 0 02 0 35 mm 0 00157 0 4 mm Connecting Rod Big End Oil Clearance 1 Clean oil from the crankshaft and connecting rod 2 Use plastic gauge style measuring tool in accordance to the manufactures...

Страница 38: ...603 mm 1 276 32 40 mm Exhaust 1 262 1 264 32 049 32 099 mm 1 256 31 9 mm Camshaft Journal OD Standard Service Limit 0 6298 0 6293 15 996 15 984 mm 0 6266 15 916 mm Check the camshaft bearing journal f...

Страница 39: ...35 Chapter 4 Electrical System Information Ignition Coil Gap Adjustment 36 Ignition Coil Resistance Inspection 36 Spark Testing 37 Fuel Solenoid 37 Charging System Specifications 38 4...

Страница 40: ...feeler gauge between the flywheel and coil 4 Adjust the ignition coil gap at both side of the coil 5 Sufficiently tighten the mounting bolts Igniting Coil Resistance Inspection Primary Coil Place Ohm...

Страница 41: ...g from the engine 3 Connect the negative electrode of the spark plug threaded area to ground cylinder head cover 4 Crank the engine and view the electrode gap Spark should be present when engine is tu...

Страница 42: ...he Charge Coil Legs 0 011 0 019 3 5 mm No Load DC Voltage Output 3000 RPM Measure Across Battery Terminals 14 5 5 Volts DC No Load AC Voltage Output 3000 RPM Measure Across Stator Leads Stator Leads D...

Страница 43: ...39 NOTES...

Страница 44: ...40 RESIDENTIAL PRODUCTS Form Number 492 9234...

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