Toro LC175FDS Service Manual Download Page 32 | Manualshive

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Cylinder Head / Valves Exploded View and Service Information

Exhaust Valve

Intake Valve

Push Rod

Guide Plate

Studs

23 ft-lbs (31 Nm)

Rocker Arm

Pivot

Pivot Lock Nut

11 ft-lbs (15 Nm)

Valve Keeper

Valve Keeper

Rotator

Retainer

Valve Spring

Spring Seat

Seal

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Summary of Contents for LC175FDS

Page 1: ...TWO STAGE SNOW ENGINE SERVICE MANUAL LC175FDS 265cc LC180FDS 302cc RESIDENTIAL PRODUCTS...

Page 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...

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

Page 4: ...1 NOTES...

Page 5: ...formation Safety 2 Service Rules 3 Engine Model Serial Number Location 3 Engine Fastener Torque Specification 4 General Specifications 5 Engine Specifications 265cc 175FDS 6 Engine Specifications 302c...

Page 6: ...ng 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 whe...

Page 7: ...Only 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...

Page 8: ...Nm Exhaust Pipe Nuts M8 22 ft lbs 30 Nm Air Cleaner Nuts M6 7 5 ft lbs 10 Nm Oil Drain Plug M10 17 ft lbs 23 Nm Oil Drain Tube M12 22 ft lbs 30 Nm Fuel Shut off Knob Screws M4 18 in lbs 2 Nm Switch bo...

Page 9: ...Dry Weight 66 1 lbs 30Kg 70 5 lbs 32Kg Engine Idle RPM 1700 2000 RPM Engine Operating RPM 3200 3400 RPM Oil Capacity 30 32 oz 0 89 0 95 l Fuel Type Unleaded Gasoline 87 Octane Fuel Capacity 1 05 Gallo...

Page 10: ...e Clearance 0 0039 0 0275 0 1 0 7 mm 0 0394 1 0 mm Crankshaft Crankpin Outside Diameter 1 2979 1 2984 32 966 32 981 mm 1 296 32 92 mm Valves Clearance cold intake 0 0059 0 15 mm Clearance cold exhaust...

Page 11: ...Side Clearance 0 0039 0 0275 0 1 0 7 mm 0 0394 1 0 mm Crankshaft Crankpin Outside Diameter 1 2979 1 2984 32 966 32 981 mm 1 296 32 92 mm Valves Clearance cold intake 0 0059 0 15 mm Clearance cold exh...

Page 12: ...l Spark Plug Incorrect Gap Fouled Loose or Faulty Air Intake Restriction Air Intake System Leaks Ignition Coil to Flywheel Gap Incorrect Weak No Spark Choke Linkage Operating RPM Incorrect Governor Ad...

Page 13: ...ngine Service Maintenance Engine Oil Change Procedure 10 Spark Plug Service 11 Valve Clearance Inspection and Adjustment 12 Engine Governor Zero Point Setting 13 Engine Idle Speed 14 Fuel Filter Repla...

Page 14: ...A in position Install the oil drain plug B torque to 17 ft lbs 23 Nm 8 Add oil through the dipstick tube Wipe the dipstick clean and fully insert it into the dipstick tube 9 Remove the dipstick and c...

Page 15: ...oroughly 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 4 Measure the...

Page 16: ...the valve stem with a feeler gauge Intake 0 0059 0 15 mm Exhaust 0 0078 0 20 mm 4 To adjust valve clearance Hold the rocker arm pivot and loosen the pivot lock nut Turn the rocker arm pivot to obtain...

Page 17: ...is position with a pair of pliers 5 Tighten the governor arm pinch bolt and nut to Specification 7 5 ft lbs 10 Nm 6 Start and warm engine 7 Run Engine at MAX RPM Adjust throttle limit screw until MAX...

Page 18: ...t to warm to normal operating temperature 2 With the engine at low idle just before the kill switch is activated adjust the throttle stop screw to achieve the recommended engine idle speed Recommended...

Page 19: ...contains no fuel to prevent leak when the fuel filter is replaced 2 Release the fuel filter fuel hose clamps A and slide them away from the fittings 3 Remove the fuel filter hose asm from the engine...

Page 20: ...16 NOTES...

Page 21: ...r Head Exploded View and Service Information 27 Cylinder Head Valves Exploded View and Service Information 28 Valve Spring Cylinder Head Specifications 29 Valve Stem and Guide Specifications 30 Valve...

Page 22: ...18 Engine Service Upper End Heater Box Exploded View Gasket Heater Box Cover Heater Box Insert Primer Bulb Carburetor Mounting Nuts 7 ft lbs 10 Nm Ignition Switch and Key...

Page 23: ...e throttle return spring from throttle shaft Pull Carburetor outward Align governor rod with notch in throttle shaft Remove governor rod and remove carburetor Throttle Shaft Throttle Return spring Gov...

Page 24: ...20 Carburetor Exploded View Gasket Gasket Gasket Float Pin Needle Asm Float Main Jet and Nozzle Primer Asm Primer Hose Choke Lever Asm Jet O ring Throttle Stop Screw 7 ft lbs 10 Nm Float Bowl...

Page 25: ...k Engine Cover Rear Panel Exploded View Fuel Tank Mounting Hardware 7 ft lbs 10 Nm Fuel Tank Mounting Hardware 7 ft lbs 10 Nm Rear Panel 7 ft lbs 10 Nm 19 ft lbs 26 Nm Clip Fuel Tank Cover Fuel Tank D...

Page 26: ...uel Hose Exploded View Fuel Tank Mounting Bracket 19 ft lbs 26 Nm Starter Switch Bracket 7 ft lbs 10 Nm Fuel Filter Fuel Hose Fuel Hose and Sleeve Fuel Shut Off Valve 7 ft lbs 10 Nm Front Panel 18 in...

Page 27: ...23 Muffler Heat Shield Exploded View Muffler Shield 19 ft lbs 26 Nm Muffler Protector Muffler 7 ft lbs 10 Nm 22 ft lbs 30 Nm Exhaust Pipe Gasket 7 ft lbs 10 Nm 3...

Page 28: ...Throttle Control Asm Exploded View 7 ft lbs 10 Nm Pinch Bolt Governor Arm Governor Rod Throttle Return Spring Governor Arm Governor Spring Engine Kill Switch 7 ft lbs 10 Nm Throttle Limit Screw Throt...

Page 29: ...25 Recoil Asm Exploded View Upper Heat Shroud 7 ft lbs 10 Nm Shroud and Recoil Asm 7 ft lbs 10 Nm 7 ft lbs 10 Nm Set Screw Guide Clip Spring Recoil Asm Ratchet Spring Reel Rope 3...

Page 30: ...26 Starter Flywheel Coil Exploded View Starter Asm 12 in lbs 1 5 Nm Flywheel 80 ft lbs 109 Nm 7 ft lbs 10 Nm Ignition Coil Asm Stator 7 ft lbs 10 Nm Rubber Grommet Fan Cup...

Page 31: ...sket Breather Tube Spark Plug 22 ft lbs 30 Nm Gasket 7 ft lbs 10 Nm Shroud Cylinder Head Bolt Torque Sequence 1 Initially Torque the 4 Cylinder Head Bolts in a Crisscross Pattern to 10 ft lbs 14 Nm 2...

Page 32: ...ploded View and Service Information Exhaust Valve Intake Valve Push Rod Guide Plate Studs 23 ft lbs 31 Nm Rocker Arm Pivot Pivot Lock Nut 11 ft lbs 15 Nm Valve Keeper Valve Keeper Rotator Retainer Val...

Page 33: ...er damage 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 material from the cylinde...

Page 34: ...alve Guide Inspection Ream the exhaust valve guide to remove any carbon deposits before measuring Valve Guide ID Specification Standard Service Limit 0 2598 0 2604 6 60 6 615 mm 0 2624 6 66 mm Valve S...

Page 35: ...material 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 fro...

Page 36: ...mation Bearing Seal Crankcase Cover Governor Gasket Valve Tappets Camshaft Triangular Mark to Face Down Piston Asm Rod Cap Crankshaft Governor Drive Gear Seal 14 ft lbs 19Nm 17 ft lbs 23 Nm 17 ft lbs...

Page 37: ...33 Governor Exploded View Crankcase Shaft Washer Clip Governor Gear Pin Weight Slider Pin Washer Governor Shaft 3...

Page 38: ...ton Arrow Top Ring Gap Second Ring Gap Oil Rings Stagger Scraper Rings 150 210 from the Oil Ring Install Piston Ring with Markings UP Triangular Mark to Face DOWN Towards Push Rods Oil Splash Spoon Co...

Page 39: ...35 Crankshaft Camshaft Timing 3 Timing Marks Crankshaft Camshaft...

Page 40: ...3 0 7085 17 992 17 998 mm 0 7067 17 95 mm Cylinder Inside Diameter Inspect cylinder inside diameter for taper and out of round with a bore gauge Measure in two different directions front to back and s...

Page 41: ...8 79 97 79 98 mm 3 1437 79 85 mm Piston to Cylinder Clearance Specification Engine Standard Service Limit 175FDS 1 180FDS 1 0 00059 0 002 0 015 0 052 mm 0 0047 0 12 mm Piston Ring to Groove Clearance...

Page 42: ...DS 1 180FDS 1 0 0079 0 0275 0 2 0 7 mm 0 0394 1 0 mm Use the piston to position the rings squarely 1 down from the top of the cylinder Connecting Rod Small End ID Engine Standard Service Limit 175FDS...

Page 43: ...175FDS 1 180FDS 1 0 0039 0 0275 0 1 0 7 mm 0 0394 1 0 mm Connecting Rod Big End Oil Clearance Clean oil from the crankshaft and connecting rod Use plastic gauge style measuring tool in accordance to...

Page 44: ...mm 1 2342 31 35 mm 180FDS 1 1 246 1 253 31 66 31 82 mm 1 232 31 30 mm Camshaft Journal Outside Diameter Engine Standard Service Limit 175FDS 1 180FDS 1 0 6285 0 6292 15 966 15 984 mm 0 6267 15 92 mm...

Page 45: ...41 Chapter 4 Electrical System Information Ignition Coil Gap Adjustment 42 Ignition Coil Resistance Inspection 42 Spark Testing 43 Stator Resistance Test 43 4...

Page 46: ...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 Ignition Coil Resistance Inspection Primary Coil Place Ohm...

Page 47: ...ve the spark plug 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 w...

Page 48: ...44 RESIDENTIAL PRODUCTS Form Number 492 9235...

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