Related Manuals for Toro LC175FDS
Summary of Contents for Toro LC175FDS
- Page 1 RESIDENTIAL PRODUCTS TWO STAGE SNOW ENGINE SERVICE MANUAL LC175FDS (265cc) LC180FDS (302cc)
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Page 2: About This Manual
An electronic version of this service manual is available on the Toro Dealer Portal. We are hopeful that you will find this manual a valuable addition to your service shop. If you have any questions or comments regarding this... - Page 3 Chapter 1 – General Service Information Chapter 2 - Engine Service / Maintenance Chapter 3 - Engine Disassembly and Service Chapter 4 - Electrical...
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Page 5: Table Of Contents
Chapter 1 – General Service Information Safety Service Rules Engine Model / Serial Number Location Engine Fastener Torque Specification General Specifications Engine Specifications - 265cc / 175FDS Engine Specifications - 302cc / 180FDS Troubleshooting... -
Page 6: Safety
This manual is intended as a service and repair manual only. The safety instructions provided herein are for troubleshooting, service, and repair of the Toro engine. The Toro operator’s manual contains safety information and operating tips for safe operating practices. -
Page 7: Service Rules
Service Rules 1. 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 friction components with clean engine oil or engine assembly lube when assembling engine. -
Page 8: Engine Fastener Torque Specification
Engine Fastener Torque Specifications Torque Item Fastener Size Specification Cylinder Head Bolts 35 ft-lbs (48 Nm) Connecting Rod Bolts 14 ft-lbs (19Nm) Flywheel Nut 80 ft-lbs (109 Nm) Valve Adjust Lock Nut 11 ft-lbs (15 Nm) Rocker Arm Studs 22 ft-lbs (30 Nm) Crankcase Cover Bolts 22 ft-lbs (30 Nm) Exhaust Studs... -
Page 9: General Specifications
General Specifications MODEL 265cc / LC175FDS 302cc / LC180FDS Engine Type OHV Single Cylinder, Four Stroke, Forced Air Cooling Displacement (cc) Bore × Stroke (mm) 75×60 80×60 Compression Ratio 8.2:1 8.9:1 Dry Weight 66.1 lbs. (30Kg) 70.5 lbs. (32Kg) Engine Idle RPM 1700 - 2000 RPM 3200 –... -
Page 10: Engine Specifications - 265Cc / 175Fds
Engine Specifications - 265cc / 175FDS Part Item Standard Service Limit 2.953 - 2.954” (75.015-75.025 mm) 2.959” (75.17 mm) Cylinder Sleeve Inside Diameter 2.951 - 2.952” (74.970-74.980 mm) 2.939” (74.65 mm) Skirt Outside Diameter 0.00059 - 0.002” (0.015-0.052 mm) 0.0047” (0.12 mm) Clearance to Cylinder Piston 0.7087 - 0.7089”... -
Page 11: Engine Specifications - 302Cc / 180Fds
Engine Specifications - 302cc / 180FDS Part Item Standard Service Limit 3.4651 - 3.4655” (80.015-80.025 mm) 3.4712” (80.17 mm) Cylinder Sleeve Inside Diameter 3.1484 - 3.1488” (79.97-79.98 mm) 3.1437” (79.85 mm) Skirt Outside Diameter 0.00059 - 0.002” (0.015-0.052 mm) Clearance to Cylinder 0.0047”... -
Page 12: Troubleshooting
Troubleshooting Hard Starting / Poor Running - Incorrect Fuel (Level, Age, Octane, Ethanol Content) - Fuel System Contamination and / or Carburetor Debris - Primer System Incorrect Function - Incorrect Oil Level - Spark Plug (Incorrect Gap, Fouled, Loose or Faulty) - Air Intake Restriction - Air Intake System Leaks - Ignition Coil to Flywheel Gap Incorrect... - Page 13 Chapter 2 - Engine Service / Maintenance Engine Oil Change Procedure Spark Plug Service Valve Clearance Inspection and Adjustment Engine Governor – Zero Point Setting Engine Idle Speed Fuel Filter Replacement...
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Page 14: Engine Oil Change Procedure
Engine Oil Change Procedure 1. Run engine to warm engine oil. 2. Remove the ignition key. 3. Remove oil dipstick. 4. Position oil drain pan under oil drain plug. 5. Firmly hold the oil drain tube (A) in position. Remove the oil drain plug (B). 6. -
Page 15: Spark Plug Service
Spark Plug Service NOTE: Spark plugs of the wrong size or incorrect heat range can cause severe engine damage. High Voltage Ignition Systems can be Dangerous - Use Caution when Servicing Ignition Systems 1. Disconnect the spark plug boot and thoroughly clean the spark plug area. 2. -
Page 16: Valve Clearance Inspection And Adjustment
Valve Clearance Inspection and Adjustment NOTE: Valve clearance inspection and adjustment must be done with the engine cold 1. Rotate engine to TDC (top-dead-center) of the compression stroke. 2. Remove the valve cover. Be sure both valves are completely closed and the decompression arm is not holding the valve open. -
Page 17: Engine Governor - Zero Point Setting
Engine Governor – Zero Point Setting 1. Remove the front and rear panel to gain access to the governor arm and throttle limit screw. 2. Loosen but do not remove the governor arm pinch bolt and nut. 3. Move the governor arm away the carburetor to fully open the throttle valve. Firmly hold the governor arm in this position. -
Page 18: Engine Idle Speed
Engine Idle Speed 1. Start the engine and allow it 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 Idle Speed: 1700 - 2000 RPM Stop Screw Valve Cover... -
Page 19: Fuel Filter Replacement
Fuel Filter and Hose Replacement - Fuel is Extremely Flammable - Use Extreme Caution When Servicing Fuel System 1. Drain the fuel tank into an approved container. NOTE: Ensure fuel system contains no fuel to prevent leak when the fuel filter is replaced. 2. - Page 20 NOTES:...
- Page 21 Chapter 3 - Engine Disassembly and Service Engine Service – Upper End 18-31 Heater Box Exploded View Carburetor Mounting Carburetor Exploded View Fuel Tank / Engine Cover / Rear Panel Exploded View Engine Cover / Front Panel / Fuel Tank / Fuel Hose View Muffler / Heat Shield Exploded View Governor and Throttle Control Exploded View Recoil Asm.
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Page 22: Engine Service - Upper End
Engine Service – Upper End Heater Box Exploded View Ignition Switch and Key Gasket Heater Box Insert Heater Box Cover Carburetor Mounting Nuts Primer Bulb 7 ft-lbs (10 Nm) -
Page 23: Carburetor Mounting
Carburetor Mounting Governor Rod Throttle Return Spring Note spacer orientation for installation Spacer Fuel Hose Primer Asm. Gasket Carburetor Removal: Governor Rod Notch -Remove throttle return spring from throttle shaft -Pull Carburetor outward Throttle Throttle -Align governor rod with notch Shaft Return spring in throttle shaft... -
Page 24: Carburetor Exploded View
Carburetor Exploded View Primer Asm. O ring Choke Lever Asm. Primer Hose Throttle Stop Screw Main Jet and Nozzle Float Needle Asm. Float Pin Gasket Float Bowl Gasket Gasket 7 ft-lbs (10 Nm) -
Page 25: Fuel Tank / Engine Cover / Rear Panel Exploded View
Fuel Tank / Engine Cover / Rear Panel Exploded View Fuel Tank Mounting Hardware 7 ft-lbs (10 Nm) Dip Stick Fuel Tank Cover Fuel Tank Clip Rear Panel 19 ft-lbs (26 Nm) Fuel Tank Mounting Hardware 7 ft-lbs (10 Nm) 7 ft-lbs (10 Nm) -
Page 26: Engine Cover / Front Panel / Fuel Tank / Fuel Hose View
Engine Cover / Front Panel / Fuel Tank / Fuel Hose Exploded View 7 ft-lbs (10 Nm) 19 ft-lbs (26 Nm) Fuel Tank Starter Switch Fuel Hose Mounting Bracket Bracket Fuel Filter Fuel Hose and Sleeve 7 ft-lbs 7 ft-lbs (10 Nm) (10 Nm) Front Panel... -
Page 27: Muffler / Heat Shield Exploded View
Muffler / Heat Shield Exploded View 7 ft-lbs (10 Nm) Muffler Shield Muffler Protector 19 ft-lbs (26 Nm) Muffler Exhaust Pipe Gasket 7 ft-lbs (10 Nm) 22 ft-lbs (30 Nm) -
Page 28: Governor And Throttle Control Exploded View
Governor and Throttle Control Asm. Exploded View Throttle Control Asm. Pinch Bolt 7 ft-lbs (10 Nm) Governor Arm Engine Kill Switch Throttle Return Spring Governor Arm 7 ft-lbs (10 Nm) Governor Spring Throttle Limit Screw Governor Rod... -
Page 29: Recoil Asm. Exploded View
Recoil Asm. Exploded View Upper Heat Shroud Shroud and Recoil Asm. 7 ft-lbs (10 Nm) 7 ft-lbs (10 Nm) 7 ft-lbs (10 Nm) Set Screw Clip Spring Guide Recoil Asm. Ratchet Spring Reel Rope... -
Page 30: Starter / Flywheel / Coil Exploded View
Starter / Flywheel / Coil Exploded View 12 in-lbs (1.5 Nm) Starter Asm. 7 ft-lbs (10 Nm) Rubber Grommet 80 ft-lbs (109 Nm) Stator Ignition Coil Asm. 7 ft-lbs (10 Nm) Flywheel... -
Page 31: Cylinder Head Exploded View And Service Information
Cylinder Head Exploded View and Service Information Spark Plug 22 ft-lbs (30 Nm) Gasket Gasket Valve Cover Breather Shroud Tube 7 ft-lbs (10 Nm) 7 ft-lbs (10 Nm) 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: Cylinder Head / Valves Exploded View And Service Information
Cylinder Head / Valves Exploded View and Service Information Exhaust Valve Spring Seat Valve Spring Seal Retainer Valve Keeper Valve Keeper Rotator Intake Valve Push Rod Guide Plate Studs Pivot Lock Nut Pivot 23 ft-lbs (31 Nm) 11 ft-lbs (15 Nm) Rocker Arm... -
Page 33: Valve Spring / Cylinder Head Specifications
Valve Spring Free Length Specification Standard Service Limit 1.535” (39 mm) 1.476” (37.5 mm) Valve Seat Width Inspection Remove carbon deposits from the combustion chamber. Inspect the valve seats for pitting or other damage. Standard Service Limit 0.03149 - 0.0393” 0.0591”... -
Page 34: Valve Stem And Guide Specifications
Valve Stem Inspection Inspect each valve for face irregularities, bending or abnormal wear. Valve Stem Diameter Specification Standard Service Limit 0.2584 - 0.2590” 0.2535” Intake (6.565-6.58 mm) (6.44 mm) 0.2577 - 0.2583” 0.252” Exhaust (6.545-6.56 mm) (6.40 mm) Valve Guide Inspection Ream the exhaust valve guide to remove any carbon deposits before measuring. -
Page 35: Valve Seat Reconditioning
Valve Seat Reconditioning 1. Thoroughly clean the combustion chamber and valve seats to remove carbon deposits. 2. Apply a light coat of Prussian Blue or erasable felt-tipped marker ink to the valve faces. 3. Properly install valves, springs and keepers. Manually open the valves, then and snap them closed against their seats several times. -
Page 36: Engine Service - Lower End
Engine Service – Lower End Crankcase Exploded View and Service Information Crankcase Cover Seal Governor Drive Gear Governor Crankshaft 14 ft-lbs (19Nm) 22 ft-lbs (30 Nm) 22 ft-lbs (30 Nm) Rod Cap Bearing Gasket Valve Tappets Camshaft Piston Asm. Torque in a Seal Crisscross Pattern 17 ft-lbs (23 Nm) -
Page 37: Governor Exploded View
Governor Exploded View Crankcase Shaft Washer Governor Shaft Weight Slider Clip Washer Governor Gear... -
Page 38: Piston / Connecting Rod Exploded View And Information
Piston / Connecting Rod Exploded View and Service Information Second Ring / Gap Piston Rotation Arrow Install Piston Ring with Markings “UP” Oil Rings Top Ring / Gap Stagger Scraper Rings 150°～ 210° from the Oil Ring Connecting Rod Piston Pin Piston Pin Clip Oil Splash Spoon Point Down to... -
Page 39: Crankcase / Camshaft Timing
Crankshaft / Camshaft Timing Crankshaft Timing Marks Camshaft... -
Page 40: Bearing / Piston Pin / Cylinder Id Specifications
Crankshaft Bearing Free Play 1. Clean the bearing in solvent and dry it. 2. Spin the bearing by hand and check for play. Replace the bearing if it is noisy or has excessive free play. Piston Pin OD Standard Service Limit 0.7083 - 0.7085”... -
Page 41: Piston / Piston Ring Specifications
Piston Skirt Outside Diameter Measure and the piston skirt outside diameter 10mm from the skirt base and 90°to piston pin hole. Engine Standard Service Limit 2.951 - 2.952” 2.939” 175FDS-1 (74.970-74.980 mm) (74.65 mm) 3.1484 - 3.1488” 3.1437” 180FDS-1 (79.97-79.98 mm) (79.85 mm) Piston to Cylinder Clearance Specification Engine... -
Page 42: Piston Ring / Connecting Rod Specifications
Piston Ring End Gap Top and Middle Rings Engine Standard Service Limit 0.0079 - 0.0157” 0.0394” 175FDS-1 180FDS-1 (0.2-0.4 mm) (1.0 mm) Oil Ring Engine Standard Service Limit 0.0079 - 0.0275” 0.0394” 175FDS-1 180FDS-1 (0.2-0.7 mm) (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... -
Page 43: Crankshaft Specifications
Crankshaft Pin Outside Diameter Engine Standard Service Limit 1.2979” - 1.2984” 1.296” 175FDS-1 180FDS-1 (32.966-32.981 mm) (32.92 mm) Connecting Rod Big End Side Clearance Engine Standard Service Limit 0.0039 - 0.0275” 0.0394” 175FDS-1 180FDS-1 (0.1-0.7 mm) (1.0 mm) Connecting Rod Big End Oil Clearance - Clean oil from the crankshaft and connecting rod. -
Page 44: Camshaft And Crankcase Cover Specifications
Camshaft Lobe Height Specifications Intake Engine Standard Service Limit 1.2455 - 1.2501” 1.2342” 175FDS-1 (31.636-31.754 mm) (31.35 mm) 1.257 - 1.264” 1.244” 180FDS-1 (31.953-32.113 mm) (31.60 mm) Exhaust Engine Standard Service Limit 1.2470 - 1.2533” 1.2342” 175FDS-1 (31.674 -31.834 mm) (31.35 mm) 1.246 - 1.253”... - Page 45 Chapter 4 – Electrical System Information Ignition Coil Gap Adjustment Ignition Coil Resistance Inspection Spark Testing Stator Resistance Test...
- Page 46 Ignition Coil Gap Adjustment High Voltage Ignition Systems can be Dangerous - Use Caution when Servicing Ignition Systems 1. Install the ignition coil and lightly tighten the igniting coil mounting bolts. 2. Rotate engine so ignition coil is aligned with the magnet portion of the flywheel. 3.
- Page 47 Spark Testing - Fuel is Extremely Flammable - Use Extreme Caution When Servicing the Fuel System - High Voltage Ignition Systems can be Dangerous - Use Caution when Servicing Ignition Systems 1. Remove spark plug cap from the spark plug. 2.
- Page 48 RESIDENTIAL PRODUCTS Form Number: 492-9235...