John deere 314 f walk behind tillers service repair manual (tm1687)
- 1. TECHNICAL MANUAL Litho in U.S.A John Deere Worldwide Commercial and Consumer Equipment Division 314F, 518R, and 820R Walk-Behind Tillers TM1687 (01Jan97)
- 2. Model 820R Walk-Behind Tillers Model 314F Model 518R
- 3. INTRODUCTION 1/7/97 1 - 1 This technical manual is written for an experienced technician and contains sections that are specifically for this product. It is a part of a total product support program. The manual is organized so that all the information on a particular system is kept together. The order of grouping is as follows: • Table of Contents • General Diagnostic Information • Specifications • Electrical Wiring Harness Legend • Component Location • System Schematic • Wiring Harness • Troubleshooting Chart • Theory of Operation • Diagnostics • Tests & Adjustments • Repair Note: Depending on the particular section or system being covered, not all of the above groups may be used. Each section will be identified with a symbol rather than a number. The pages within a section will be consecutively numbered. Headings in each section indicate the job being performed. A heading with no model designation applies to all the models in this manual. Headings followed by model designations apply only to those models. All information, illustrations and specifications in this manual are based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice. We appreciate your input on this manual. To help, there are postage paid post cards included at the back. If you find any errors or want to comment on the layout of the manual please fill out one of the cards and mail it back to us. COPYRIGHT©1997 John Deere Worldwide Commercial and Consumer Equipment Division Horicon, WI All rights reserved Information Specifications and Engine Electrical Safety Miscellaneous Power Train
- 4. SAFETY 1 - 2 1/16/97 HANDLE FLUIDS SAFELY-AVOID FIRES • BE PREPARED FOR EMERGENCIES When you work around fuel, do not smoke or work near heaters or other fire hazards. Store flammable fluids away from fire hazards. Do not incinerate or puncture pressurized containers. Make sure machine is clean of trash, grease, and debris. Do not store oily rags; they can ignite and burn spontaneously. Be prepared if a fire starts. Keep a first aid kit and fire extinguisher handy. Keep emergency numbers for doctors, ambulance service, hospital, and fire department near your telephone. RECOGNIZE SAFETY INFORMATION This is the safety-alert symbol. When you see this symbol on your machine or in this manual, be alert to the potential for personal injury. Follow recommended precautions and safe servicing practices. • UNDERSTAND SIGNAL WORDS A signal word—DANGER, WARNING, or CAUTION— is used with the safety-alert symbol. • DANGER identifies the most serious hazards. Danger or Warning safety signs are located near specific hazards. • CAUTION safety signs are used where general precautions should be used. CAUTION also calls attention to safety messages in this manual. REPLACE SAFETY SIGNS Replace missing or damaged safety signs. See the machine operator’s manual for correct safety sign placement.
- 5. SAFETY 1/16/97 1 - 3 USE SAFE SERVICE PROCEDURES • WEAR PROTECTIVE CLOTHING Wear close fitting clothing and safety equipment appropriate to the job. Prolonged exposure to loud noise can cause impairment or loss of hearing. Wear a suitable hearing protective device such as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises. Operating equipment safely requires the full attention of the operator. Do not wear radio or music headphones while operating machine. • SERVICE MACHINES SAFELY Tie long hair behind your head. Do not wear a necktie, scarf, loose clothing, or necklace when you work near machine tools or moving parts. If these items were to get caught, severe injury could result. Remove rings and other jewelry to prevent electrical shorts and entanglement in moving parts. • USE PROPER TOOLS Use tools appropriate to the work. Makeshift tools and procedures can create safety hazards. Use power tools only to loosen threaded parts and fasteners. For loosening and tightening hardware, use the correct size tools. DO NOT use U.S. measurement tools on metric fasteners. Avoid bodily injury caused by slipping wrenches. Use only service parts meeting John Deere specifications. • PARK MACHINE SAFELY Before working on the machine: 1. Be sure all equipment is resting firmly on the ground. 2. Stop the engine. 3. Disconnect the spark plug. 4. Hang a “DO NOT OPERATE” tag in operator station. • SUPPORT MACHINE PROPERLY AND USE PROPER LIFTING EQUIPMENT If you must work on a lifted machine or attachment, securely support the machine or attachment. Do not support the machine on cinder blocks, hollow tiles, or props that may crumble under continuous load. Do not work under a machine that is supported solely by a jack. Follow recommended procedures in this manual. Lifting heavy components incorrectly can cause severe injury or machine damage. Follow recommended procedure for removal and installation of components in the manual. • WORK IN A CLEAN AREA Before starting a job: 1. Clean work area and machine. 2. Make sure you have all necessary tools to do your job. 3. Have the right parts on hand. 4. Read all instructions thoroughly; do not attempt shortcuts. • USING HIGH PRESSURE WASHERS Directing pressurized water at electronic/electrical components or connectors, bearings, hydraulic seals, fuel injection pumps or other sensitive parts and components may cause product malfunctions. Reduce pressure and spray at a 45 to 90 degree angle.
- 6. SAFETY 1 - 4 1/16/97 • Illuminate Work Area Safely Illuminate your work area adequately but safely. Use a portable safety light for working inside or under the machine. Make sure the bulb is enclosed by a wire cage. The hot filament of an accidentally broken bulb can ignite spilled fuel or oil. • Work In Ventilated Area Engine exhaust fumes can cause sickness or death. If it is necessary to run an engine in an enclosed area, remove the exhaust fumes from the area with an exhaust pipe extension. If you do not have an exhaust pipe extension, open the doors and get outside air into the area. WARNING: California Proposition 65 Gasoline engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. • Remove Paint Before Welding Or Heating Avoid potentially toxic fumes and dust. Hazardous fumes can be generated when paint is heated by welding, soldering, or using a torch. Do all work outside or in a well ventilated area. Dispose of paint and solvent properly. Remove paint before welding or heating: If you sand or grind paint, avoid breathing the dust. Wear an approved respirator. If you use solvent or paint stripper, remove stripper with soap and water before welding. Remove solvent or paint stripper containers and other flammable material from area. Allow fumes to disperse at least 15 minutes before welding or heating. • Avoid Harmful Asbestos Dust Avoid breathing dust that may be generated when handling components containing asbestos fibers. Inhaled asbestos fibers may cause lung cancer. Components in products that may contain asbestos fibers are brake pads, brake band and lining assemblies, clutch plates, and some gaskets. The asbestos used in these components is usually found in a resin or sealed in some way. Normal handling is not hazardous as long as airborne dust containing asbestos is not generated. Avoid creating dust. Never use compressed air for cleaning. Avoid brushing or grinding material containing asbestos. When servicing, wear an approved respirator. A special vacuum cleaner is recommended to clean asbestos. If not available, apply a mist of oil or water on the material containing asbestos. Keep bystanders away from the area. SERVICE TIRES SAFELY Explosive separation of a tire and rim parts can cause serious injury or death. Do not attempt to mount a tire unless you have the proper equipment and experience to perform the job. Always maintain the correct tire pressure. Do not inflate the tires above the recommended pressure. Never weld or heat a wheel and tire assembly. The heat can cause an increase in air pressure resulting in a tire explosion. Welding can structurally weaken or deform the wheel. When inflating tires, use a clip-on chuck and extension hose long enough to allow you to stand to one side and NOT in front of or over the tire assembly. Use a safety cage if available. Check wheels for low pressure, cuts, bubbles, damaged rims or missing lug bolts and nuts.
- 7. SAFETY 1/16/97 1 - 5 AVOID INJURY FROM ROTATING TINES Keep hands and feet away while machine is running. Shut off engine before starting service. Do not defeat safey systems to allow machine to operate unattended. HANDLE CHEMICAL PRODUCTS SAFELY Direct exposure to hazardous chemicals can cause serious injury. Potentially hazardous chemicals used with John Deere equipment include such items as lubricants, coolants, paints, and adhesives. A Material Safety Data Sheet (MSDS) provides specific details on chemical products: physical and health hazards, safety procedures, and emergency response techniques. Check the MSDS before you start any job using a hazardous chemical. That way you will know exactly what the risks are and how to do the job safely. Then follow procedures and recommended equipment. • Dispose of Waste Properly Improperly disposing of waste can threaten the environment and ecology. Potentially harmful waste used with John Deere equipment include such items as oil, fuel, coolant, brake fluid, filters, and batteries. Use leakproof containers when draining fluids. Do not use food or beverage containers that may mislead someone into drinking from them. Do not pour waste onto the ground, down a drain, or into any water source. Inquire on the proper way to recycle or dispose of waste from your local environmental or recycling center, or from your John Deere dealer. LIVE WITH SAFETY Before returning machine to customer, make sure machine is functioning properly, especially the safety systems. Install all guards and shields.
- 8. SPECIFICATIONS & INFORMATION CONTENTS Page CONTENTS 1/16/97 2 - 1 SPECIFICATIONS TORQUE VALUES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 METRIC FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 INCH FASTENER TORQUE VALUES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 GASOLINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 GASOLINE— NORTH AMERICA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 GASOLINE STORAGE— NORTH AMERICA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 GASOLINE—EUROPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 GASOLINE STORAGE—EUROPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ENGINE OIL—NORTH AMERICA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ENGINE OIL—EUROPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ENGINE BREAK–IN OIL— NORTH AMERICA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 ENGINE BREAK–IN OIL— EUROPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 ANTI-CORROSION GREASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 ALTERNATIVE LUBRICANTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 SYNTHETIC LUBRICANTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 LUBRICANT STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 MIXING OF LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 GREASE —NORTH AMERICA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 GREASE —EUROPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 GEAR CASE AND TRANSMISSION GREASE—NORTH AMERICA. . . . . . . . . . . . 11 GEAR CASE AND TRANSMISSION GREASE—EUROPE . . . . . . . . . . . . . . . . . . . 11 PRODUCT IDENTIFICATION LOCATIONS . . . . . . . . . . . . . . . . . . . . . . 12
- 9. 3 - 6 1/16/97 SPECIFICATIONS ENGINE SPECIFICATIONS ENGINE SPECIFICATIONS 314F 518R 820R Manufacturer Tecumseh Briggs & Stratton Briggs & Stratton Model H30 135292 196432 Type (cycle) Air cooled (4) Air cooled (4) Air cooled (4) Horsepower@ 3 hp (2.23 kW)@ 5 hp (3.72 kW)@ 8 hp (5.9 kW)@ RPM 3600 RPM 3250 RPM 3250 RPM Displacement 148.5 cc 206 cc 319 cc (9.06 cu. in.) (12.57 cu. in.) (19.44 cu. in.) Slow Idle Speed 2150±150 RPM 1750 RPM 1750 RPM Fast Idle Speed 3600±150 RPM 3300±100 RPM 3300±100 RPM Cylinder Bore 63.5 mm 65.1 mm 76.187 mm (Nominal) (2.5 in.) (2.562 in.) (2.9995 in.) Stroke 46.74 mm 61.98 mm 69.85 mm (1.844 in.) (2.44 in.) (2.75 in.) Lubrication Type Splash System Splash System Splash System Oil capacity 0.62L 0.591 L 1.30 L (21 U.S. oz.) (20 U.S. oz.) (44 U.S. oz.) Oil fill Right side of Either side of Extended oil fill Crankcase cover Crankcase cover and dipstick. FUEL Type required Unleaded Gasoline, 87 Octane Fuel tank capacity 1.9 L 2.84 L 3.79 L (2 U.S. qt.) (3 U.S. qt.) (1 U.S. gal.) Carburetor Float-type with primer Diaphragm type Float type Fuel filter Screen in fuel tank Screen on fuel pickup Screen in fuel tank Screen on main jet pickup ELECTRICAL SPECIFICATIONS Item 314F 518R 820R Ignition Electronic Electronic Electronic Spark plug Resistor Resistor Resistor (J17LM Champion) (RJ19LM Champion) (RJ19LM Champion) Starting Recoil with compression release standard on all models.
- 10. 1/16/97 3 - 7 ENGINE REPAIR SPECIFICATIONS Electric start Optional 120 VAC Armature Air Gap .3175 mm 0.25-0.36 mm 0.25-0.36 mm (0.0125 in.) 0.010-0.014 0.010-0.014 Spark Plug Gap 0.762 mm 0.71-0.084 mm 0.71-0.084 mm (0.030 in.) (0.028-0.033 in.) (0.028-0.033 in.) REPAIR SPECIFICATIONS Item 314F 518R 820R Carburetor Float Float gauge or 5.56 mm Diaphragm type Non Adjustable (7/32 in.) drill bit Connecting Rod: Crankpin End 21.89-21.91 mm 25.43 mm 28.63 mm Maximum I.D. (0.8620-0.8625 in.) (1.001 in.) (1.127 in.) Crankpin End 21.89-21.91 mm 25.395-25.410 mm 28.547-28.557 mm Standard I.D. (0.8620-0.8625 in.) (0.9998-1.0004 in.) (1.1239-1.1243 in.) Piston Pin Bore 14.318 mm 12.50 mm 17.12 mm Maximum I.D. (0.5637 in.) (0.492 in.) (0.674 in.) Piston Pin Bore 14.305-14.318 mm 12.451-12.466 mm 17.087-17.094 mm Standard I.D. (0.5632-0.5637 in.) (0.4902-0.4908 in.) (0.6727-0.6730 in.) Crankshaft Journals: Flywheel End 25.36-25.37 mm 22.17 mm 29.95 mm Minimum O.D. (0.9985-0.9990 in.) (.873 in.) (1.179 in.) Flywheel End 25.36-25.37 mm 22.205-22.225 mm 29.987-30.008 mm Standard O.D. (0.9985-0.9990 in.) (.8742-.8750 in.) (1.1806-1.1814 in.) PTO End 22.18-22.19 mm 25.35 mm 29.95 mm Minimum O.D. (0.8735-0.8740 in.) (0.998 in.) (1.179 in.) PTO End 22.18-22.19 mm 25.380-25.400 mm 29.987-30.008 mm Standard O.D. (0.8735-0.8740 in.) (0.9992-1.0000 in.) (1.1806-1.1814 in.) Crankshaft Crankpin 21.87-21.88 mm 25.30 mm 28.50 mm Minimum O.D. (0.8610-0.8615 in.) (0.996 in.) (1.122 in.) Crankshaft Crankpin 21.87-21.88 mm 25.349-25.370 mm 28.547-28.557 mm Standard O.D. (0.8610-0.8615 in.) (0.9980-.9988 in.) (1.1239-1.1243 in.) Crankshaft End Play 0.13-0.69 mm 0.05-0.30 mm 0.051-0.762 mm (0.005-0.027 in.) (0.002-0.012 in.) (0.002-0.030 in). Camshaft Journals: PTO End 12.64-12.65 mm 12.65 mm 12.65 mm Maximum O.D. (.4975-.4980 in.) (0.498 in.) (0.498 in.) PTO End 12.64-12.65 mm 12.67-12.70 mm 12.67-12.70 mm
- 11. 3 - 8 1/16/97 REPAIR SPECIFICATIONS ENGINE Standard O.D. (.4975-.4980 in.) 0.499-0.500 in. 0.499-0.500 in. Flywheel End 12.64-12.65 mm 12.65 mm 12.65 mm Maximum O.D. (.4975-.4980 in.) (0.498 in.) (0.498 in.) Flywheel End 12.64-12.65 mm 12.67-12.70 mm 12.67-12.70 mm Standard O.D. (.4975-.4980 in.) (0.499-0.500 in.) (0.499-0.500 in.) Camshaft Lobe O.D.: Intake (Standard) Not Available 24.46-24.71 mm 24.46-24.71 mm (0.963-0.973 in.) (0.963-0.973 in.) Intake (Maximum) Not Available 24.13 mm (0.950 in.) 24.13 mm (0.950 in.) Exhaust (Standard) Not Available 24.46-24.71 mm 25.36-25.44 mm (0.963-0.973 in.) (0.9985-1.0015 in.) Exhaust (Maximum) Not Available 24.13 mm (0.950 in.) 24.82 mm (0.977 in.) Camshaft Bearing (In Crankcase & Crankcase Cover): Flywheel End 12.64-12.65 mm 12.80 mm 12.80 mm Maximum I.D. (0.4975-0.4980 in.) (0.504 in.) (0.504 in.) Flywheel End 12.64-12.65 mm 12.71-12.74 mm 12.71-12.74 mm Standard I.D. (0.4975-0.4980 in.) (0.5005-.05015 in.) (0.5005-0.5015 in.) P.T.O. End 12.64-12.65 mm 12.80 mm 12.80 mm Maximum I.D. (0.4975-0.4980 in.) (0.504 in.) (0.504 in.) P.T.O. End 12.64-12.65 mm 12.73-12.75 mm 12.73 mm Standard I.D. (0.4975-0.4980 in.) (0.501-0.502 in.) (0.501-0.502 in.) Crankshaft Bearings (In Crankcase & Crankcase Cover): P.T.O. End 22.24-22.25 mm 25.48 mm 30.10 mm Maximum I.D. (0.8755-0.8760 in.) (1.003 in.) (1.185 in.) P.T.O. End 22.24-22.25 mm 25.433-25.446 mm 30.043-30.088 mm Standard I.D. (0.8755-0.8760 in.) (1.0013-1.0018 in.) (1.1828-1.1846 in.) Flywheel End 25.41-25.43 mm 22.30 mm 30.10 mm Maximum I.D. (1.0005-1.0010 in.) (0.878 in.) (1.185 in.) Flywheel End 25.41-25.43 mm 22.271-22.281 mm 30.043-30.088 mm Standard I.D. (1.0005-1.0010 in.) (0.8768-0.8772 in.) (1.1828-1.1846 in.) Cylinder Bore: Bore I.D. 63.5-63.53 mm 65.062-65.088 mm 76.175-76.200 mm (Min.-Max.) (2.5000-2.5010 in.) (2.5615-2.5625 in.) (2.999-3.000 in.) Bore I.D. 63.5 mm 65.1 mm 76.187 mm (Nominal) (2.50 in.) (2.562 in.) (2.9995 in.)
- 12. 1/16/97 3 - 9 ENGINE REPAIR SPECIFICATIONS Piston Pin: Piston Bore 0.13 mm 12.47 mm 17.09 mm (Maximum) (0.005 in.) (0.491 in.) (0.673 in.) Piston Bore 0.13 mm 12.45-12.47 mm 17.081-17.087 mm (Standard) (0.005 in.) (0.490-0.491 in.) (0.6725-0.6727 in.) Connecting Rod 0.13 mm 12.50 mm 17.12 mm Bore (Maximum) (0.005 in.) (0.492 in.) (0.674 in.) Connecting Rod 0.13 mm 12.451-12.466 mm 17.087-17.094 mm Bore (Standard) (0.005 in.) (0.4902-.4908 in.) (0.6727-0.6730 in.) Pin Diameter 14.295 mm 12.42 mm 17.04 mm (Minimum) (0.5628 in.) (0.489 in.) (0.671 in.) Pin Diameter 14.295-14.300 mm 12.441-12.446 mm 17.074-17.082 mm (Standard) (0.5628-0.5630 in.) (0.4898-0.4900 in.) (0.6722-0.6725 in.) Cylinder Bore Cross Hatch Pattern 45 degrees 45 degrees 45 degrees Cylinder Head Distortion (Max.) 0.05 mm (0.002 in.) Not available at time Not available at time of printing of printing Valve Clearance: Intake 0.10-0.25 mm 0.10-0.20 mm 0.13-0.18 mm (0.004-0.010 in.) (0.004-0.008 in.) (0.005-0.007 in.) Exhaust 0.10-0.25 mm 0.15-0.30 mm 0.23-0.28 mm (0.004-0.010 in.) (0.006-0.012 in.) (0.009-0.011 in.) Valves: Head Margins (Intake) 0.7874 mm (0.0310 in.) 1.04 mm (0.041 in.) 0.683 mm (0.0269 in.) Head Margin (Exhaust)0.7874 mm (0.0310 in.) 1.04 mm (0.041 in.) 0.826 mm (0.0625 in.) Exhaust Face Angle 46° 44.75° 44.75° Intake Face Angle 46° 29.75° 29.75° Intake Stem O.D. 6.31-6.32 mm 6.261-6.2287 mm 7.848-7.874 mm (0.248-0.249 in.) (0.2465-0.2475 in.) (0.309-0.310 in.) Exhaust Stem O.D. 6.18-6.20 mm 6.261-6.2287 mm 7.848-7.874 mm (0.243-0.244 in.) (0.2465-0.2475 in.) (0.309-0.310 in.) Valve Seats: Exhaust Angle 46° 45.25° 45.25° Intake Angle 46° 30.25° 30.25° Minimum Width 0.889-1.143 mm 0.79 mm (0.031 in.) 0.79 mm (0.031 in.) (0.035-0.045 in.) Valve Guides: Exhaust I.D. 7.130 mm 6.388-6.414 mm 7.938-7.963 mm (0.2807 in.) 0.2515-0.2525 in. (0.3125-0.3135 in.) Intake I.D. 7.130 mm 6.325-6.350 mm 7.912-7.938 mm (0.2807 in.) 0.2490-0.2500 in.) (0.3115-0.3125 in.)
- 13. 3 - 10 1/16/97 TORQUE SPECIFICATIONS ENGINE Piston Rings: Ring-to-Land Clearance: Maximum Clearance 0.127 mm (0.005 in.) 0.18 mm (0.007 in.) 0.23 mm (0.009 in.) Top Ring 0.05-0.127 mm 0.089-0.152 mm 0.10-0.15 mm (Standard) (0.002-0.005 in.) (0.0035-0.006 in.) (0.004-0.006 in.) Center Ring 0.05-0.127 mm 0.015-0.660 mm 0.038-0.089 mm (Standard) (0.002-0.005 in.) (0.0006-0.0026 in.) (0.0015-0.0035 in.) Oil Control Ring 0.013-0.089 mm Not Available Not Available (Standard) (0.0005-0.0035 in.) Not Available Not Available Piston Ring End Gap: Compression Max. 0.432 mm (0.017 in.) 0.889 mm (0.035 in.) 0.76 mm (0.030 in.) Top (Standard) 0.18-0.43 mm 0.13-0.33 mm 0.25-0.46 mm (.007-.017 in.) (.005-.013 in.) (.010-.018 in.) Center (Standard) 0.18-0.43 mm 0.36-0.56 mm 0.25-0.46 mm (.007-.017 in.) (0.014-0.022 in.) (.010-.018 in.) Oil Control Max. Not Available 1.14 mm (0.045 in.) 0.89 mm (0.035 in.) Oil Control (Std.) 0.432 mm 0.33-0.53 mm 0.25-0.46 mm (0.017 in.) (0.013-0.021 in.) (.010-.018 in.) TORQUE SPECIFICATIONS 314F 518R 820R Spark Plug 29 N•m (250 lb-in.) 20 N•m (180 lb-in.) 20 N•m (180 lb-in.) Cylinder Head 22.5 N•m 15.7 N•m 16.9 N•m Cap Screw (200 lb-in.) (140 lb-in.) (150 lb-in.) Flywheel Nut 47.5 N•m 81 N•m 108 N•m (35 lb-ft) (60 lb-ft) (80 lb-ft) Intake Manifold 10 N•m 13.5 N•m 13.5 N•m Cap Screw (90 lb-in.) (120 lb-in.) (120 lb-in.) Muffler Cap Screw 4 N•m 12 N•m 10.2 N•m (37.5 lb-in.) (100 lb-in.) (90 lb-in.) Carburetor Mount 7.5 N•m (68 lb-in.) 9 N•m (90 lb-in.) 9 N•m (90 lb-in.) Connecting Rod 11.5 N•m 11 N•m 21 N•m Cap Screw (105 lb-in.) (100 lb-in.) (185 lb-in.) Crankcase Cover 13 N•m 11 N•m 14 N•m Cap Screw (115 lb-in.) (100 lb-in.) (125 lb-in.) OTHER MATERIALS SCOTCH-BRITE abrasive pads. . . . . . . . . . . . .Remove carbon deposits from combustion chamber John Deere NEVER-SEEZ® Lubricant PT569. . . . . . . . . . . . . . . . . . . . . . . Apply to crankshaft end. Thread Lock and Sealer (Medium Strength) T43512. . . . . . . . . . . . . . . . . . .Apply to governor shaft. LOCTITE®PRODUCTS thread locking compound TY9477 (#242) (Medium Strength) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Apply to governor shaft. ® LO C T IT E is a registered tradem ark of the Loctite C orp.
- 14. 1/16/97 3 - 11 ENGINE COMPONENT LOCATION—314F ENGINE COMPONENT LOCATION—314F ENGINE Fuel Tank Tank Screen Air Filter High Speed Throttle Control M87452A Primer Bulb Recoil Starter Spark Plug Fuel Line Fuel Inlet Adjusting Needle Fast Idle Speed Limiter Screw Governor Lever
- 15. 3 - 12 1/16/97 COMPONENT LOCATION—518R ENGINE ENGINE COMPONENT LOCATION—518R ENGINE Recoil Starter Air Intake Spark Plug Throttle Choke Control Lever Control Lever Breather Tube Engine Shroud M87497
- 16. 1/16/97 3 - 13 ENGINE COMPONENT LOCATION—820R ENGINE COMPONENT LOCATION—820R ENGINE Engine Oil Fill Spark Plug Vented Fuel Cap Engine Shut-Off Switch Breather Heat Recoil Starter Electric Engine Muffler and Safety Shield Vacuum Driven Fuel Pump Low Speed Mixture Engine High Speed Stop Screw Screw Tube Shield Oil Fill Air Intake Screen Shroud Starter M87496
- 17. 3 - 14 1/16/97 COMPONENT LOCATION—314F CARBURETOR ENGINE COMPONENT LOCATION—314F CARBURETOR A. Throttle Shaft B. Return Spring C. Dust Seal Washer D. Dust Seal, Throttle E. Screws F. Throttle Valve G. Primer Bulb H. Retainer I. Welch Plug J. O-Ring K. Fuel Inlet Fitting L. Inlet Seat M. Inlet Needle N. Clip O. Float P. Float Shaft Q. Float Bowl R. Gasket S. Float Bowl Retaining Nut T. O-Ring U. Washer V. Spring W. Fast Idle Adjustment Screw I J H G F E D C B A N K O P S T L M W V U R Q M87451
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- 19. 1/16/97 3 - 15 ENGINE COMPONENT LOCATION—518R CARBURETOR COMPONENT LOCATION—518R CARBURETOR A. Fuel Pump Cover B. Idle Speed Adjustment Screw C. Spring D. Throttle Shaft E. Throttle Plate F. Screw G. Fuel Tank Mounting Screw/ Lockwasher H. Gasket I. Throttle Link J. Pivot K. Shoulder Head Cap Screw L. Choke Plate M. Choke Shaft N. Washer O. Felt Washer P. Idle Mixture Screw Q. Spring R. Welch Plug S. Fuel Pickup T. Retaining Clip U. Carburetor Mounting Cap Screw V. Welch Plug W. Spring X. Spring Cap Y. Fuel Pump Diaphragm Z. Roll Pin AA. Fuel Pump Cover Cap Screw I J H G F E D CB K L NO P Q R S T V WX Y Z M A M87500 U AA
- 20. 3 - 16 1/16/97 COMPONENT LOCATION—820R CARBURETOR ENGINE COMPONENT LOCATION—820R CARBURETOR A. Screw B. Throttle Plate C. Throttle Shaft D. Throttle Shaft Seal E. Bushing F. Choke Shaft G. Choke Plate H. Return Spring I. Choke Shaft Seal J. Float K. Float Shaft L. O-Ring M. Float Bowl N. Seal O. Bowl Retainer Bolt P. Spring Q. Idle speed Adjustment Screw R. Limiter Cap S. Low Speed Mixture Screw T. Fuel Inlet Fitting U. Inlet Valve Seat V. Inlet Valve W. Main Jet X. Pilot Jet Y. Welch Plug A B C D E F G H I J K L M N O Q P RS T V U W Y X M87499