John Deere LX172 LX173 LX176 LX178 LX186 LX188 Lawn and Garden Tractor Repair Manual

M58372 LX Series Lawn Tractor

INTRODUCTION 6/4/96 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 • Specifications • Component Location • System Schematic • Theory of Operation • Troubleshooting Chart • 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 tab symbol rather than a number. The groups and pages within a section will be consecutively numbered. 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 © 1996 JOHN DEERE HORICON WORKS Horicon, Wisconsin All rights reserved Information Specifications and Engine—Kawasaki Electrical Power Train (Hydrostatic) Steering Brakes Engine—Kohler Safety Miscellaneous Power Train (Gear) Attachments

SAFETY 1 - 2 6/4/96 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. General precautions are listed on CAUTION safety signs. 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. 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.

SAFETY 6/4/96 1 - 3 USE CARE IN HANDLING AND SERVICING BATTERIES Prevent Battery Explosions • Keep sparks, lighted matches, and open flame away from the top of battery. Battery gas can explode. • Never check battery charge by placing a metal object across the posts. Use a volt-meter or hydrometer. • Do not charge a frozen battery; it may explode. Warm battery to 16°C (60°F). Prevent Acid Burns • Sulfuric acid in battery electrolyte is poisonous. It is strong enough to burn skin, eat holes in clothing, and cause blindness if splashed into eyes. • Avoid acid burns by: 1. Filling batteries in a well-ventilated area. 2. Wearing eye protection and rubber gloves. 3. Avoiding breathing fumes when electrolyte is added. 4. Avoiding spilling or dripping electrolyte. 5. Use proper jump start procedure. • If you spill acid on yourself: 1. Flush your skin with water. 2. Apply baking soda or lime to help neutralize the acid. 3. Flush your eyes with water for 10-15 minutes. 4. Get medical attention immediately. • If acid is swallowed: 1. Drink large amounts of water or milk. 2. Then drink milk of magnesia, beaten eggs, or vegetable oil. 3. Get medical attention immediately. 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.

SAFETY 1 - 4 6/4/96 Park Machine Safely Before working on the machine: 1. Lower all equipment to the ground. 2. Stop the engine and remove the key. 3. Disconnect the battery ground strap. 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 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. 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 Warning 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.

SAFETY 6/4/96 1 - 5 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. AVOID INJURY FROM ROTATING BLADES, AUGERS AND PTO SHAFTS Keep hands and feet away while machine is running. Shut off power to service, lubricate or remove mower blades, augers or PTO shafts. SERVICE COOLING SYSTEM SAFELY Explosive release of fluids from pressurized cooling system can cause serious burns. Shut off machine. Only remove filler cap when cool enough to touch with bare hands. Slowly loosen cap to first stop to relieve pressure before removing completely.

SAFETY 1 - 6 6/4/96 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.

SPECIFICATIONS AND GENERAL INFORMATION CONTENTS Page CONTENTS 6/3/96 2 - 1 SPECIFICATIONS AND GENERAL INFORMATION GENERAL VEHICLE SPECIFICATIONS VEHICLE SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 METRIC FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . . . . . . . . . 2-7 INCH FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 GASOLINE 4-CYCLE ENGINES—NORTH AMERICA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 GASOLINE STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 4-CYCLE ENGINES—EUROPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 GASOLINE STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 OILS AND LUBRICANTS KAWASAKI 4-CYCLE GASOLINE ENGINE OIL—NORTH AMERICA . . . . . . . . . 2-11 KAWASAKI 4-CYCLE GASOLINE ENGINE OIL—EUROPE . . . . . . . . . . . . . . . . 2-12 KOHLER 4-CYCLE GASOLINE ENGINE OIL—NORTH AMERICA . . . . . . . . . . . 2-13 KOHLER 4-CYCLE GASOLINE ENGINE OIL—EUROPE . . . . . . . . . . . . . . . . . . 2-13 BREAK-IN 4-CYCLE GASOLINE ENGINE OIL—NORTH AMERICA . . . . . . . . . . 2-14 BREAK-IN 4-CYCLE GASOLINE ENGINE OIL—EUROPE . . . . . . . . . . . . . . . . . 2-15 HYDROSTATIC TRANSMISSION OIL—NORTH AMERICA. . . . . . . . . . . . . . . . . 2-16 HYDROSTATIC TRANSMISSION OIL—EUROPE . . . . . . . . . . . . . . . . . . . . . . . . 2-16 GEAR TRANSMISSION GREASE —NORTH AMERICA . . . . . . . . . . . . . . . . . . . 2-17 GEAR TRANSMISSION GREASE—EUROPE . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 GREASE—NORTH AMERICA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 GREASE—EUROPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 ANTI-CORROSION GREASE—NORTH AMERICA . . . . . . . . . . . . . . . . . . . . . . . 2-19 ANTI-CORROSION GREASE—EUROPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 ALTERNATIVE LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 SYNTHETIC LUBRICANTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 LUBRICANT STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 MIXING OF LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 OIL FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 GASOLINE ENGINE COOLANT—NORTH AMERICA . . . . . . . . . . . . . . . . . . . . . 2-21 GASOLINE ENGINE COOLANT DRAIN INTERVAL—NORTH AMERICA . . . . . . 2-21 GASOLINE ENGINE COOLANT—EUROPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22 GASOLINE ENGINE COOLANT DRAIN INTERVAL—EUROPE . . . . . . . . . . . . . 2-22 SERIAL NUMBER LOCATIONS MACHINE IDENTIFICATION NUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23 ENGINE SERIAL NUMBER—LX172, LX176 AND LX186 . . . . . . . . . . . . . . . . . . 2-23 ENGINE SERIAL NUMBER—LX173. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23 ENGINE SERIAL NUMBER—LX178 AND LX188. . . . . . . . . . . . . . . . . . . . . . . . . 2-23 CARBURETOR SERIAL NUMBER—LX172, LX176 AND LX186 . . . . . . . . . . . . . 2-23 CARBURETOR PART NUMBER—LX173 (ONLY) . . . . . . . . . . . . . . . . . . . . . . . . 2-23 CARBURETOR SERIAL NUMBER—LX178 AND LX188 . . . . . . . . . . . . . . . . . . . 2-24 GEAR TRANSAXLE SERIAL NUMBER—LX172 AND LX173 . . . . . . . . . . . . . . . 2-24 HYDROSTATIC TRANSAXLE SERIAL NUMBER —LX176, LX178, LX186 AND LX188 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24 MOWER DECK SERIAL NUMBERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24

2 - 2 6/5/96 GENERAL VEHICLE SPECIFICATIONS SPECIFICATIONS & INFORMATION GENERAL VEHICLE SPECIFICATIONS ENGINE—LX172 AND LX176 Make . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . John Deere “K” Series Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gasoline Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FC420V Aspiration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Natural Horsepower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.4 kW (14 hp) Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423 mL (25.8 cu. in.) Stroke/Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Cycle Bore. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 mm (3.500 in.) Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 mm (2.68 in.) Slow Idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1550 ±75 rpm Fast Idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3350 ±50 rpm Valving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overhead Valves Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressurized Oil Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full Flow Filter Engine Oil Capacity (with filter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.50 L (3.2 U.S. pt) Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Cooled Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . Two-stage with replaceable filter element Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Horizontal discharge below frame ENGINE—LX173 Make . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Kohler Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Command LT Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gasoline Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CV15S Aspiration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Natural Horsepower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.19 kW (15.0 hp) Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426 cc (26.0 cu. in.) Stroke/Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Cycle Bore. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 mm (3.60 in.) Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 mm (2.64 in.) Slow Idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1650 ±75 rpm Fast Idle (Domestic) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3350 ±50 rpm Valving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overhead Valves Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressurized Oil Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full Flow Filter (w/o By-Pass Valve) Engine Oil Capacity (with filter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 L (1.9 U.S. qt) Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Cooled Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paper with outer foam element Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Horizontal discharge below frame Compression Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic/Centrifugal Compression Ratio (Cranking) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:1 Compression Ratio (Running) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5:1

John Deere LX172 LX173 LX176 LX178 LX186 LX188 Lawn and Garden Tractor Repair Manual

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