John Deere Horicon Works 318, Horicon Works 316, Horicon Works 420 User Manual

316,

318 and 420

Lawn and Garden

Tractors

For complete service information also see:

Onan Engines (16,18,20,24 HP) . . . . . . . . . CTM2

John Deere Horicon Works

TM1590 (17MAY95)

LITHO IN U.S.A.

ENGLISH

SECTION 10—GENERAL INFORMATION

Group 05—Safety Group 10—General Specifications Group 15—Repair Specifications Group 20—Test and Adjustment Specifications Group 25—Fuels and Lubricants Group 30—Serial Number Locations

SECTION 20—ENGINE REPAIR

Group 05—Engine

SECTION 40—ELECTRICAL REPAIR

Group 05—Front PTO Clutch

SECTION 50—POWER TRAIN REPAIR

Group 05—Transmission Group 10—Transmission Control Linkage Group 15—Differential Group 20—Rear Axles Group 25—Drive Shaft

SECTION 60—STEERING AND BRAKE REPAIR

Group 05—Steering—316 Group 06—Steering—318 and 420 Group 10—Brakes

SECTION 70—HYDRAULIC REPAIR

Group 05—Hydraulic Control Valve

SECTION 80—MISCELLANEOUS REPAIR

Group 05—Front Axle Group 10—Mower Spindle and Jack Sheave

Repair

Group 15—Mower Gear Case Repair

SECTION 240—ELECTRICAL CHECKOUT,

OPERATION AND DIAGNOSIS

Group 05—Electrical System Checkout Group 10—Electrical Schematics Group 15—Component Location and Operation Group 20—Electrical System Diagnosis Group 25—Electrical System Component Tests

and Adjustments

SECTION 250—POWER TRAIN CHECKOUT,

OPERATION AND DIAGNOSIS

Group 05—Power Train Checkout Group 10—Theory of Operation Group 15—Diagnosis, Tests and Adjustments

SECTION 260—STEERING AND BRAKES

CHECKOUT, OPERATION AND DIAGNOSIS

Group 05—Steering And Brakes System

Checkout Group 10—Theory of Operation Group 15—Diagnosis, Tests and Adjustments

SECTION 270—HYDRAULIC SYSTEM

CHECKOUT, OPERATION AND DIAGNOSIS

Group 05—Hydraulic System Checkout Group 10—Hydraulic Schematics Group 15—Theory of Operation Group 20—Diagnosis, Tests and Adjustments

SECTION 299—DEALER FABRICATED TOOLS

Group 00—Dealer Fabricated Tools

Index

SECTION 220—ENGINE, FUEL AND AIR SYSTEM

CHECKOUT AND DIAGNOSIS

Group 05—Engine, Fuel and Air System

Checkout

Group 10—Diagnosis, Tests and Adjustments

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.

TM1590-19-17MAY95

DEERE & COMPANY

Moline, Illinois

A John Deere ILLUSTRUCTION™ Manual

TM1590 (17MAY95) i 316, 318 & 420 Lawn and Garden Tractors

020895

220

240

250

Contents

220

240

250

TM1590 (17MAY95) ii 316, 318 & 420 Lawn and Garden Tractors

020895

Contents

260

270

299

INDX

TM1590 (17MAY95) iii 316, 318 & 420 Lawn and Garden Tractors

020895

260

270

299

INDX

Contents

TM1590 (17MAY95) iv 316, 318 & 420 Lawn and Garden Tractors

020895

FOREWORD

Introduction

This manual is written for an experienced technician. Essential tools required in performing certain service work are identified in this manual and are recommended for use.

Live with safety: Read the safety messages in the introduction of this manual and the cautions presented throughout the text of the manual.

This is the safety-alert symbol. When you see

this symbol on the machine or in this manual, be alert to the potential for personal injury.

Technical manuals are divided in two parts: repair and diagnostics. Repair sections tell how to repair the components. Diagnostic sections help you identify the majority of routine failures quickly.

Information is organized in groups for the various components requiring service instruction. At the beginning of each group are summary listings of all applicable essential tools, other materials needed to do the job and service parts kits.

Section 10, Group 15—Repair Specifications, consist of all applicable specifications, near tolerances and specific torque values for various components on each individual machine.

Section 10, Group 20—Test and Adjustment Specifications, consist of all applicable test and adjustment specifications for various systems for each individual machine.

Binders, binder labels, and tab sets can be ordered by John Deere dealers direct from the John Deere Distribution Service Center.

This manual is part of a total product support program.

FOS MANUALS—REFERENCE TECHNICAL MANUALS—MACHINE SERVICE COMPONENT MANUALS—COMPONENT SERVICE Fundamentals of Service (FOS) Manuals cover basic

theory of operation, fundamentals of troubleshooting, general maintenance, and basic type of failures and their causes. FOS Manuals are for training new personnel and for reference by experienced technicians.

Technical Manuals are concise guides for specific machines. Technical manuals are on-the-job guides containing only the vital information needed for diagnosis, analysis, testing, and repair.

Component Technical Manuals are concise service guides for specific components. Component technical manuals are written as stand-alone manuals covering multiple machine applications.

MX,1590,IFC -19-09DEC94

TM1590 (17MAY95) 316, 318 & 420 Lawn and Garden Tractors

020895

Dealer Presentation Sheet

JOHN DEERE DEALERS

IMPORTANT: Please remove this page and route

through your service department.

This is a complete revision for models 316, 318 and 420 found in TM1277 and TM1345. The complete revision of remaining machines (322, 330, 332 and 430) can be found in TM1591. AFTER recieving both TM1590 and TM1591, please discard old TM1277 dated December 1987, TM1345 dated June 1986 and TM1309 dated July

1985.

NOTE: There are several “versions” of each model

tractor. All versions were not availble at time of latest printing. Some versions may not be covered.

MX,1590,DLR -19-20MAR95

TM1590 (17MAY95) 316, 318 & 420 Lawn and Garden Tractors

020895

Dealer Presentation Sheet

TM1590 (17MAY95) 316, 318 & 420 Lawn and Garden Tractors

020895

GENERAL INFORMATION

Page

Group 05—Safety . . . . . . . . . . . . . . . . 10-05-1

Group 10—General Specifications

Machine Specifications . . . . . . . . . . . . . 10-10-1

Group 15—Repair Specifications

Repair Specifications . . . . . . . . . . . . . . 10-15-1

Metric Series Torque Chart . . . . . . . . . . 10-15-4

Inch Series Torque Chart . . . . . . . . . . . 10-15-5

Metric Torque Values—Grade 7 . . . . . . . 10-15-6

Set Screw Torque Chart . . . . . . . . . . . . 10-15-6

Service Recommendations

O-Ring Boss Fittings . . . . . . . . . . . . . 10-15-7

Flat Face O-Ring Seal Fittings . . . . . . 10-15-8

Tube and Hose Fitting, 37˚ Flare and

30˚ Cone Seat Connectors . . . . . . . 10-15-9

Section 10

Contents

Group 20—Test and Adjustment

Specifications . . . . . . . . . . 10-20-1

Group 25—Fuels and Lubricants

Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 10-25-1

Storing Fuel . . . . . . . . . . . . . . . . . . . . 10-25-1

Engine Oil . . . . . . . . . . . . . . . . . . . . . 10-25-2

Transmission and Hydraulic Oil . . . . . . . 10-25-3

Grease . . . . . . . . . . . . . . . . . . . . . . . . 10-25-4

Mower Deck Gear Case Oil . . . . . . . . . . 10-25-4

Alternative and Synthetic Lubricants . . . . 10-25-5

Lubricant Storage . . . . . . . . . . . . . . . . . 10-25-5

Mixing of Lubricants . . . . . . . . . . . . . . . 10-25-5

Group 30—Serial Number Locations

Serial Numbers

Product Identification . . . . . . . . . . . . . 10-30-1

Engine . . . . . . . . . . . . . . . . . . . . . . 10-30-1

Transmission . . . . . . . . . . . . . . . . . . 10-30-1

Differential . . . . . . . . . . . . . . . . . . . . 10-30-2

Control Valve . . . . . . . . . . . . . . . . . . 10-30-2

TM1590 (17MAY95) 10-1 316, 318 & 420 Lawn and Garden Tractors

020895

Contents

TM1590 (17MAY95) 10-2 316, 318 & 420 Lawn and Garden Tractors

020895

RECOGNIZE SAFETY INFORMATION

Group 05

Safety

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 operating 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.

10 05 1

T81389 -UN-07DEC88

DX,ALERT -19-03MAR93

TS187 -19-30SEP88

DX,SIGNAL -19-03MAR93

FOLLOW SAFETY INSTRUCTIONS

Carefully read all safety messages in this manual and on your machine safety signs. Keep safety signs in good condition. Replace missing or damaged safety signs. Be sure new equipment components and repair parts include the current safety signs. Replacement safety signs are available from your John Deere dealer.

Learn how to operate the machine and how to use controls properly. Do not let anyone operate without instruction.

Keep your machine in proper working condition. Unauthorized modifications to the machine may impair the function and/or safety and affect machine life.

If you do not understand any part of this manual and need assistance, contact your John Deere dealer.

TS201 -UN-23AUG88

DX,READ -19-03MAR93

TM1590 (17MAY95) 10-05-1 316, 318 & 420 Lawn and Garden Tractors

020895

HANDLE FLUIDS SAFELY—AVOID FIRES

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.

Safety

TS227 -UN-23AUG88

DX,FLAME -19-04JUN90

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).

PREPARE FOR EMERGENCIES

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.

TS204 -UN-23AUG88

DX,SPARKS -19-03MAR93

DX,FIRE2 -19-03MAR93

TM1590 (17MAY95) 10-05-2 316, 318 & 420 Lawn and Garden Tractors

020895

TS291 -UN-23AUG88

PREVENT ACID BURNS

Safety

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 the hazard 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 15—30 minutes. Get medical attention immediately.

If acid is swallowed:

1. Do not induce vomiting.

2. Drink large amounts of water or milk, but do not exceed 2 L (2 quarts).

3. Get medical attention immediately.

10 05 3

TS203 -UN-23AUG88

DX,POISON -19-21APR93

TM1590 (17MAY95) 10-05-3 316, 318 & 420 Lawn and Garden Tractors

020895

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.

(See your John Deere dealer for MSDS’s on chemical products used with John Deere equipment.)

Safety

TS1132 -UN-26NOV90

AVOID HIGH-PRESSURE FLUIDS

Escaping fluid under pressure can penetrate the skin causing serious injury.

Avoid the hazard by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure.

Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids.

If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of injury should reference a knowledgeable medical source. Such information is available from Deere & Company Medical Department in Moline, Illinois, U.S.A.

DX,MSDS,NA -19-03MAR93

X9811 -UN-23AUG88

DX,FLUID -19-03MAR93

TM1590 (17MAY95) 10-05-4 316, 318 & 420 Lawn and Garden Tractors

020895

PREPARE MACHINE FOR REPAIR

Safety

1. Move hydrostatic control lever to STOP position.

2. Disengage PTO’s

3. Lower all equipment to the ground.

4. Engage park brake.

5. Stop the engine and remove the key.

6. Operate all hydraulic control levers to release hydraulic pressure in the system.

Before you leave the operator’s seat, wait for engine and attachment parts to stop moving.

SUPPORT MACHINE PROPERLY

Always lower the attachment or implement to the ground before you work on the machine. If you must work on a lifted machine or attachment, securely support the machine or attachment.

10 05 5

M34228 -UN-24APR89

MX,1005R,8 -19-01APR86

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.

TS229 -UN-23AUG88

DX,LOWER -19-04JUN90

TM1590 (17MAY95) 10-05-5 316, 318 & 420 Lawn and Garden Tractors

020895

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.

Safety

TS206 -UN-23AUG88

DX,WEAR -19-10SEP90

WORK IN CLEAN AREA

Before starting a job:

• Clean work area and machine.

• Make sure you have all necessary tools to do your job.

• Have the right parts on hand.

• Read all instructions thoroughly; do not attempt shortcuts.

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.

T6642EJ -UN-18OCT88

DX,CLEAN -19-04JUN90

DX,LOOSE -19-04JUN90

TM1590 (17MAY95) 10-05-6 316, 318 & 420 Lawn and Garden Tractors

020895

TS228 -UN-23AUG88

WORK IN VENTILATED AREA

Safety

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.

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.

10 05 7

TS220 -UN-23AUG88

DX,AIR -19-04JUN90

TS223 -UN-23AUG88

DX,LIGHT -19-04JUN90

REPLACE SAFETY SIGNS

Replace missing or damaged safety signs. See the machine operator’s manual for correct safety sign placement.

USE PROPER LIFTING EQUIPMENT

Lifting heavy components incorrectly can cause severe injury or machine damage.

Follow recommended procedure for removal and installation of components in the manual.

TS201 -UN-23AUG88

DX,SIGNS1 -19-04JUN90

DX,LIFT -19-04JUN90

TM1590 (17MAY95) 10-05-7 316, 318 & 420 Lawn and Garden Tractors

020895

TS226 -UN-23AUG88

REMOVE PAINT BEFORE WELDING OR HEATING

10 05

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.

Safety

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 HEATING NEAR PRESSURIZED FLUID LINES

Flammable spray can be generated by heating near pressurized fluid lines, resulting in severe burns to yourself and bystanders. Do not heat by welding, soldering, or using a torch near pressurized fluid lines or other flammable materials. Pressurized lines can be accidentally cut when heat goes beyond the immediate flame area.

TS220 -UN-23AUG88

DX,PAINT -19-03MAR93

DX,TORCH -19-03MAR93

TM1590 (17MAY95) 10-05-8 316, 318 & 420 Lawn and Garden Tractors

020895

TS953 -UN-15MAY90

SERVICE TIRES SAFELY

Safety

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.

10 05 9

TS952 -UN-12APR90

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.

DX,TIRECP -19-24AUG90

TS220 -UN-23AUG88

DX,DUST -19-15MAR91

TM1590 (17MAY95) 10-05-9 316, 318 & 420 Lawn and Garden Tractors

020895

PRACTICE SAFE MAINTENANCE

Understand service procedure before doing work. Keep

area clean and dry.

Never lubricate, service, or adjust machine while it is moving. Keep hands, feet , and clothing from power-driven parts. Disengage all power and operate controls to relieve pressure. Lower equipment to the ground. Stop the engine. Remove the key. Allow machine to cool.

Securely support any machine elements that must be raised for service work.

Keep all parts in good condition and properly installed. Fix damage immediately. Replace worn or broken parts. Remove any buildup of grease, oil, or debris.

Disconnect battery ground cable (-) before making adjustments on electrical systems or welding on machine.

Safety

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.

TS218 -UN-23AUG88

DX,SERV -19-03MAR93

TS779 -UN-08NOV89

DX,REPAIR -19-04JUN90

TM1590 (17MAY95) 10-05-10 316, 318 & 420 Lawn and Garden Tractors

020895

DISPOSE OF WASTE PROPERLY

Safety

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.

Air conditioning refrigerants escaping into the air can damage the Earth’s atmosphere. Government regulations may require a certified air conditioning service center to recover and recycle used air conditioning refrigerants.

Inquire on the proper way to recycle or dispose of waste from your local environmental or recycling center, or from your John Deere dealer.

10 05 11

TS1133 -UN-26NOV90

LIVE WITH SAFETY

Before returning machine to customer, make sure machine is functioning properly, especially the safety systems. Install all guards and shields.

DX,DRAIN -19-03MAR93

TS231 -19-07OCT88

DX,LIVE -19-25SEP92

TM1590 (17MAY95) 10-05-11 316, 318 & 420 Lawn and Garden Tractors

020895

10 05 12

Safety

TM1590 (17MAY95) 10-05-12 316, 318 & 420 Lawn and Garden Tractors

020895

MACHINE SPECIFICATIONS

Group 10

General Specifications

316 318 420

ENGINE

Manufacturer . . . . . . . . . . . . . . . . Onan . . . . . . . . . . . . Onan . . . . . . . . . . . . Onan

Type . . . . . . . . . . . . . . . . . . . . . Gasoline . . . . . . . . . . Gasoline . . . . . . . . . . Gasoline

Model Number

Early . . . . . . . . . . . . . . . . . . . . B43E . . . . . . . . . . . . B43G . . . . . . . . . . . . B48G

Later . . . . . . . . . . . . . . . . . . . . P218G . . . . . . . . . . . P218G . . . . . . . . . . . P220G

Horsepower (SAEJ607)

Early . . . . . . . . . . . . . . . . . . . . 11.9 kW (16 hp) . . . . . 13.4 kW (18 hp) . . . . . 14.9 kW (20 hp)

Later . . . . . . . . . . . . . . . . . . . . 13.4 kW (18 hp) . . . . . 13.4 kW (18 hp) . . . . . 14.9 kW (20 hp)

Torque . . . . . . . . . . . . . . . . . . . . 4.4 kg m (31.5 ft lbs) . . 4.4 kg m (31.5 ft lbs) . . 4.4 kg m (31.8 ft lbs)

Engine Rated Speeds

Fast Idle (No Load) . . . . . . . . . . 3450 rpm . . . . . . . . . . 3450 rpm . . . . . . . . . . 3450 rpm

Low Idle (No Load) . . . . . . . . . . 1350 rpm . . . . . . . . . . 1350 rpm . . . . . . . . . . 1350 rpm

Number of Cylinders . . . . . . . . . . . 2 . . . . . . . . . . . . . . . 2 . . . . . . . . . . . . . . . 2

Crankshaft Alignment . . . . . . . . . . Horizontal . . . . . . . . . Horizontal . . . . . . . . . Horizontal

Stroke/Cycle . . . . . . . . . . . . . . . . 4 Cycle . . . . . . . . . . . 4 Cycle . . . . . . . . . . . 4 Cycle

Bore . . . . . . . . . . . . . . . . . . . . . 82.55 mm (3.25 in.) . . . 82.55 mm (3.25 in.) . . . 82.55 mm (3.25 in.)

Stroke

Early . . . . . . . . . . . . . . . . . . . . 66 mm (2.620 in.) . . . . 66 mm (2.620 in.) . . . . 73 mm (2.875 in.)

Later . . . . . . . . . . . . . . . . . . . . 73 mm (2.875 in.) . . . . 73 mm (2.875 in.) . . . . 73 mm (2.875 in.)

Displacement

Early . . . . . . . . . . . . . . . . . . . . 710 cm3 (43.3 cu in.) 710 cm3 (43.3 cu in.) 782 cm3 (47.7 cu in.)

Later . . . . . . . . . . . . . . . . . . . . 782 cm3 (47.7 cu in.) 782 cm3 (47.7 cu in.) 782 cm3 (47.7 cu in.)

Compression Ratio

Early . . . . . . . . . . . . . . . . . . . . 6.2:1 . . . . . . . . . . . . . 6.5:1 . . . . . . . . . . . . . 7.0:1

Later . . . . . . . . . . . . . . . . . . . . 7.0:1 . . . . . . . . . . . . . 7.0:1 . . . . . . . . . . . . . 7.0:1

Cylinder Material . . . . . . . . . . . . . Aluminum . . . . . . . . . Aluminum . . . . . . . . . Aluminum

Cooling . . . . . . . . . . . . . . . . . . . Air . . . . . . . . . . . . . . Air . . . . . . . . . . . . . . Air

Air Filter Type . . . . . . . . . . . . . . . Dry with Pre-Cleaner . . Dry with Pre-Cleaner . . Dry with Pre-Cleaner

Lubrication System . . . . . . . . . . . . Full Pressure w/Filter Full Pressure w/Filter Full Pressure w/Filter

Crankcase Capacity (w/o Filter) . . . 1.4 L (1.5 U.S. qt) . . . . 1.4 L (1.5 U.S. qt) . . . . 1.4 L (1.5 U.S. qt)

Oil Filter . . . . . . . . . . . . . . . . . . . Replaceable . . . . . . . . Replaceable . . . . . . . . Replaceable

Spark Plugs . . . . . . . . . . . . . . . . NGK BPR5EFS . . . . . NGK BPR5EFS . . . . . NGK BPR5EFS

Champion RS14YC . . . Champion RS14YC . . . Champion RS14YC FUEL SYSTEM

Fuel Tank Location . . . . . . . . . . . . Rear . . . . . . . . . . . . . Rear . . . . . . . . . . . . . Rear

Fuel Gauge . . . . . . . . . . . . . . . . . Standard . . . . . . . . . . Standard . . . . . . . . . . Standard

Fuel Reserve System . . . . . . . . . . N/A . . . . . . . . . . . . . . Standard . . . . . . . . . . Standard

Fuel Tank Capacity . . . . . . . . . . . 17 L (4.5 U.S. gal) . . . 17 L (4.5 U.S. gal) . . . 25 L (6.5 U.S. gal)

Fuel (min. octane) . . . . . . . . . . . . 85 Octane Unleaded . . 85 Octane Unleaded . . 85 Octane Unleaded

Fuel Pump Location . . . . . . . . . . . Engine . . . . . . . . . . . Engine . . . . . . . . . . . Engine

Fuel Pump Type . . . . . . . . . . . . . Pulse . . . . . . . . . . . . Pulse . . . . . . . . . . . . Pulse

Fuel Delivery . . . . . . . . . . . . . . . . Fixed Jet Carburetor . . Fixed Jet Carburetor . . Fixed Jet Carburetor

10 10 1

ELECTRICAL SYSTEM

Ignition . . . . . . . . . . . . . . . . . . . . Electronic . . . . . . . . . . Electronic . . . . . . . . . . Electronic

Type of Starter . . . . . . . . . . . . . . 12 Volts, Solenoid . . . . 12 Volts, Solenoid . . . . 12 Volts, Solenoid

Charging System . . . . . . . . . . . . . Early, 15 amp Stator . . 20 amp Stator . . . . . . 20 amp Stator

Later, 20 amp Stator

Continued on next page.

TM1590 (17MAY95) 10-10-1 316, 318 & 420 Lawn and Garden Tractors

MX,15901010,1 -19-25APR95

020895

General Specifications/Machine Specifications

316 318 420

ELECTRICAL SYSTEM, continued

Battery Type . . . . . . . . . . . . . . . . BCI Group 22F . . . . . . BCI Group 22F . . . . . . BCI Group 22F

Battery Voltage . . . . . . . . . . . . . . . 12V . . . . . . . . . . . . . . 12V . . . . . . . . . . . . . . 12V

Battery Reserve Capacity @

25 amp . . . . . . . . . . . . . . . . . . 102 minutes . . . . . . . . 102 minutes . . . . . . . . 102 minutes

Battery Cold Cranking amp @ 0˚F . . 491 amp . . . . . . . . . . 491 amp . . . . . . . . . . 491 amp

Headlights . . . . . . . . . . . . . . . . . . Standard . . . . . . . . . . Standard . . . . . . . . . . Standard

Rear Reflector/Tail Lights . . . . . . . . Standard . . . . . . . . . . Standard . . . . . . . . . . Standard

Dash Indicator Lights . . . . . . . . . Standard . . . . . . . . . . Standard . . . . . . . . . . Standard

Operator Presence System . . . . . . . Standard . . . . . . . . . . Standard . . . . . . . . . . Standard

Dash Instrumentation

Hourmeter . . . . . . . . . . . . . . . . Standard . . . . . . . . . . Standard . . . . . . . . . . Standard

POWER TRAIN

Transmission Type . . . . . . . . . . . . Hydrostatic . . . . . . . . . Hydrostatic . . . . . . . . . Hydrostatic, 2 Ranges

Number of Speeds . . . . . . . . . . . . Infinite . . . . . . . . . . . . Infinite . . . . . . . . . . . . Infinite

Travel Speeds

Forward . . . . . . . . . . . . . . . . . . 0—12.38 km/h . . . . . . . 0—12.38 km/h . . . . . . . N/A

(0—7.69 mph) . . . . . . . (0—7.69 mph) . . . . . . . N/A

Reverse . . . . . . . . . . . . . . . . . . 0—6.19 km/h . . . . . . . 0—6.19 km/h . . . . . . . N/A

(0—3.85 mph) . . . . . . . (0—3.85 mph) . . . . . . . N/A

Forward, High . . . . . . . . . . . . . . N/A . . . . . . . . . . . . . . N/A . . . . . . . . . . . . . . 0—15.04 km/h

(0—9.35 mph)

Forward, Low . . . . . . . . . . . . . . N/A . . . . . . . . . . . . . . N/A . . . . . . . . . . . . . . 0—9.35 km/h

(0—5.80 mph)

Reverse, High . . . . . . . . . . . . . . N/A . . . . . . . . . . . . . . N/A . . . . . . . . . . . . . . 0—7.52 km/h

(0—4.67 mph)

Reverse, Low . . . . . . . . . . . . . . N/A . . . . . . . . . . . . . . N/A . . . . . . . . . . . . . . 0—4.66 km/h

(0—2.90 mph)

Transmission Capacity w/Filter . . . . 6.1 L (13 U.S. pt) . . . . 7.1 L (15 U.S. pt) . . . . 7.1 L (15 U.S. pt)

Transmission Oil Cooler . . . . . . . . . N/A . . . . . . . . . . . . . . Standard . . . . . . . . . . Standard

Transmission Oil Filter . . . . . . . . . . Standard . . . . . . . . . . Standard . . . . . . . . . . Standard

Differential Lock . . . . . . . . . . . . . . N/A . . . . . . . . . . . . . . N/A . . . . . . . . . . . . . . Standard

STEERING

Type . . . . . . . . . . . . . . . . . . . . . . Manual . . . . . . . . . . . . Power, Hydrostatic . . . . Power, Hydrostatic

BRAKES

Location . . . . . . . . . . . . . . . . . . . Rear Wheels . . . . . . . . Rear Wheels . . . . . . . . Rear Wheels

Individually Controlled . . . . . . . . . . N/A . . . . . . . . . . . . . . Standard . . . . . . . . . . Standard

Type . . . . . . . . . . . . . . . . . . . . . . Shoe and Drum . . . . . . Shoe and Drum . . . . . . Shoe and Drum

Return-to-Neutral Braking . . . . . . . . Standard . . . . . . . . . . Standard . . . . . . . . . . Standard

Parking . . . . . . . . . . . . . . . . . . . . Yes . . . . . . . . . . . . . . Yes . . . . . . . . . . . . . . Yes

HYRAULIC SYSTEM

Type . . . . . . . . . . . . . . . . . . . . . . Single-Function . . . . . . Two-Function Three-Function

(One w/Float) . . . . . . . . (One w/Float)

Hydraulic Couplers . . . . . . . . . . . . One Set . . . . . . . . . . . Two Sets . . . . . . . . . . Two Sets

Continued on next page.

MX,15901010,2 -19-25APR95

TM1590 (17MAY95) 10-10-2 316, 318 & 420 Lawn and Garden Tractors

020895

General Specifications/Machine Specifications

316 318 420

PTO

Front . . . . . . . . . . . . . . . . . . . . . Standard . . . . . . . . . . Standard . . . . . . . . . . Standard

Rear . . . . . . . . . . . . . . . . . . . . . . Optional . . . . . . . . . . . Optional . . . . . . . . . . . Optional

Type . . . . . . . . . . . . . . . . . . . . . . Electric Clutch . . . . . . . Electric Clutch . . . . . . . Electric Clutch

Control . . . . . . . . . . . . . . . . . . . . Elec. Switch on Dash . . Elec. Switch on Dash . . Elec. Switch on Dash

PTO rpm (No Load)

Front . . . . . . . . . . . . . . . . . . . . 3450 . . . . . . . . . . . . . 3450 . . . . . . . . . . . . . 3450

Rear . . . . . . . . . . . . . . . . . . . . 2000 . . . . . . . . . . . . . 2000 . . . . . . . . . . . . . 2000

MOWER ATTACHMENT

Compatibility . . . . . . . . . . . . . . . . 38, 46 and 50 Inch . . . 38, 46 and 50 Inch . . . 50 and 60 Inch

260 Rotary . . . . . . . . . 260 Rotary

Lift System . . . . . . . . . . . . . . . . . Hydraulic . . . . . . . . . . Hydraulic . . . . . . . . . . Hydraulic

WHEEL TREAD

Front . . . . . . . . . . . . . . . . . . . . . 813 mm (32 in.) . . . . . . 813 mm (32 in.) . . . . . . 914 mm (36 in.)

Rear

Narrow . . . . . . . . . . . . . . . . . . . 775 mm (30.5 in.) . . . . 775 mm (30.5 in.) . . . . 818 mm (32 in.)

Wide . . . . . . . . . . . . . . . . . . . . 834 mm (32.8 in.) . . . . 834 mm (32.8 in.) . . . . 980 mm (38.6 in.)

TIRES Standard Tires

Front Turf . . . . . . . . . . . . . . . . . 16 x 6.50-8, 2 PR . . . . 16 x 6.50-8, 2 PR . . . . 18 x 8.50-8, 4 PR

Rear Turf or Bar . . . . . . . . . . . . 23 x 10.50-12, 2 PR . . . 23 x 10.50-12, 2 PR . . . 26 x 12.00-12, 2 PR

Optional Tires

Front (Turf) . . . . . . . . . . . . . . . . 16 x 6.50-8, 4 PR . . . . 16 x 6.50-8, 4 PR . . . . N/A

Rear (Turf or Bar) . . . . . . . . . . . 23 x 8.50-12, 2 PR . . . 23 x 8.50-12, 2 PR . . . N/A

Inflation Pressure

Front . . . . . . . . . . . . . . . . . . . . 41—110 kPa (6—16 psi) 41—110 kPa (6—16 psi) 41—152 kPa (6—22 psi)

Rear . . . . . . . . . . . . . . . . . . . . 34—69 kPa (5—10 psi) 34—69 kPa (5—10 psi) 34—69 kPa (5—10 psi)

10 10 3

SEAT

Style . . . . . . . . . . . . . . . . . . . . . . High-Back . . . . . . . . . . High-Back . . . . . . . . . . High-Back

Suspension . . . . . . . . . . . . . . . . . 2 Spring . . . . . . . . . . . 2 Spring . . . . . . . . . . . 2 Spring

Adjustment . . . . . . . . . . . . . . . . . Slide Rail . . . . . . . . . . Slide Rail . . . . . . . . . . Slide Rail

DIMENSIONS

Wheel Base . . . . . . . . . . . . . . . . . 1.2 m (46 in.) . . . . . . . 1.2 m (46 in.) . . . . . . . 1.3 m (52 in.)

Overall Length . . . . . . . . . . . . . . . 1.8 m (69.5 in.) . . . . . . 1.8 m (69.5 in.) . . . . . . 2.0 m (77 in.)

Overall Height . . . . . . . . . . . . . . . 1.1 m (44.5 in.) . . . . . . 1.1 m (44.5 in.) . . . . . . 1.21 m (47.5 in.)

Overall Width (max.) . . . . . . . . . . . 1.1 m (43.3 in.) . . . . . . 1.1 m (43.3 in.) . . . . . . 1.31 m (51.5 in.)

Overall Width (min.) . . . . . . . . . . . 1.04 m (41 in.) . . . . . . 1.04 m (41 in.) . . . . . . 1.14 m (45 in.)

Turning Radius

Inside Rear Wheel . . . . . . . . . . . 660 mm (26 in.) . . . . . . 660 mm (26 in.) . . . . . . 660 mm (26 in.)

Outside Front Wheel . . . . . . . . . 2.0 m (80 in.) . . . . . . . 2.0 m (80 in.) . . . . . . . 2.2 m (86 in.)

NET WEIGHT (No Fuel) . . . . . . . . 354 kg (780 lbs) . . . . . 354 kg (780 lbs) . . . . . 408 kg (913 lbs)

SHIPPING WEIGHT . . . . . . . . . . . 386 kg (852 lbs) . . . . . 386 kg (852 lbs) . . . . . 450 kg (993 lbs)

(Specifications and design subject to change without notice.)

MX,15901010,3 -19-25APR95

TM1590 (17MAY95) 10-10-3 316, 318 & 420 Lawn and Garden Tractors

020895

10 10

General Specifications/Machine Specifications

TM1590 (17MAY95) 10-10-4 316, 318 & 420 Lawn and Garden Tractors

020895

REPAIR SPECIFICATIONS

Group 15

Repair Specifications

Item Specifications

ENGINE For all repair specifications—Use CTM2 Engine Mounting Cap Screw/Nut Torque

316 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 N·m (29 lb-ft)

318 and 420 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 N·m (34 lb-ft)

Drive Shaft-to-Engine Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 N·m (20 lb-ft)

PTO Belt Tension Spring Length (420)

Horizontal Adjuster (Early) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 mm (1.600 in.)

Vertical Adjuster (Later) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 mm (1.380 in.)

ELECTRICAL

Front PTO Clutch-to-Crankshaft Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 N·m (35 lb-ft)

PTO Clutch Armature-to-Rotor Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.46 mm (0.018 in.)

PTO Belt Tension Spring Length (420)

Horizontal Adjuster (Early) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 mm (1.600 in.)

Vertical Adjuster (Later) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 mm (1.380 in.)

POWER TRAIN Transmission

Charge Pump-to-Transmission Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 N·m (52 lb-ft)

Transmission Cover Bearing Installation Height . . . . . . . . . . . . . . . 3 mm (0.118 in.) above housing surface

Center Section-to-Housing Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 N·m (26 lb-ft)

Transmission-to-Differential Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 N·m (33 lb-ft)

Axle Housing-to-Frame Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 N·m (75 lb-ft)

Brake Rod Spring Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 mm (1.650 in.)

Differential-to-Frame Support Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 N·m (45 lb-ft)

Swashplate Control Arm-to-Control Shaft Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 N·m (44 lb-ft)

Drive Shaft Clamping Yoke-to-Transmission Pump Shaft Cap Screw Torque . . . . . . . . . . . 60 N·m (44 lb-ft)

Differential

Case and Cover Oil Groove Depth (Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 mm (0.010 in.)

Carrier Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 N·m (39 lb-ft)

Cover-to-Case Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 N·m (204 lb-in.)

Axle Housing

Differential Seal Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 mm (0.118 in.)

Axle Housing-to-Differential Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 N·m (60 lb-ft)

Brake Plate-to-Axle Housing Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 N·m (50 lb-ft)

Axle Housing-to-Frame Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 N·m (75 lb-ft)

Brake Rod Spring Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 mm (1.650 in.)

Brake Drum-to-Axle Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 N·m (65 lb-ft)

Rear Wheel Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 N·m (52 lb-ft)

Drive Shaft

Drive Shaft-to-Engine Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 N·m (20 lb-ft)

Clamping Yoke-to-Transmission Pump Shaft Cap Screw Torque . . . . . . . . . . . . . . . . . . . 60 N·m (44 lb-ft)

10 15 1

Continued on next page.

TM1590 (17MAY95) 10-15-1 316, 318 & 420 Lawn and Garden Tractors

MX,15901015,1 -19-08MAY95

020895

Repair Specifications/Repair Specifications

Item Specifications

STEERING AND BRAKES

Steering—316

Gearbox Mounting Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 N·m (70 lb-ft)

Steering Wheel-to-Shaft Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 N·m (133 lb-in.)

Pitman Arm Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224 N·m (165 lb-ft)

Preload Adjuster Maximum End Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05 mm (0.002 in.)

Side Cover-to-Gearbox Housing Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 N·m (30 lb-ft)

Worm Bearing Preload Rolling Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.60—1.0 N·m (5—8 lb-in.)

Over-Center Preload Rolling Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.50—1.20 N·m (4—10 lb-in.)

Preload Adjuster Lock Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 N·m (25 lb-ft)

Steering Shaft Universal Joint-to-Worm Shaft Cap Screw Torque . . . . . . . . . . . . . . . . . . 24 N·m (212 lb-in.)

Steering—318 and 420

Steering Wheel-to-Shaft Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 N·m (133 lb-in.)

Rotor-to-Stator Maximum Allowable Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.08 mm (0.003 in.)

Steering Tube Bushing Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 mm (0.100 in.) below top of tube

Commutator Cover-to-Commutator Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 N·m (12 lb-in.)

Port Cover Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 N·m (22 lb-ft)

Check Ball Plug Torque (Early Version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 N·m (124 lb-in.)

Steering Cylinder Mounting Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163 N·m (120 lb-ft)

Brakes

Brake Plate-to-Axle Housing Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 N·m (50 lb-ft)

Axle Housing-to-Frame Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 N·m (75 lb-ft)

Brake Rod Spring Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 mm (1.650 in.)

Brake Drum-to-Axle Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 N·m (65 lb-ft)

Rear Wheel Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 N·m (52 lb-ft)

HYDRAULICS Single-Spool Valve

Spool Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 N·m (35 lb-in.)

Spool Cap-to-Body Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 N·m (35 lb-in.)

Check Valve Plug Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 N·m (23 lb-ft)

Two-Spool Valve Versions One, Two and Three

Spool Cap-to-Body Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 N·m (23 lb-ft)

Versions Four and Five

Spool Screw and Detent Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 N·m (35 lb-in.)

Spool Cap-to-Body Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 N·m (35 lb-in.)

Check Valve Plug Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 N·m (23 lb-ft)

Three-Spool Valve Versions One, Two and Three

Spool Cap-to-Body Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 N·m (23 lb-ft)

Lock Nut Torque (Version Three) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 N·m (23 lb-ft)

Version Four

Spool Screws and Detent Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 N·m (35 lb-in.)

Spool Cap-to-Body Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 N·m (35 lb-in.)

Check Valve Plug Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 N·m (23 lb-ft)

Continued on next page.

MX,15901015,2 -19-08MAY95

TM1590 (17MAY95) 10-15-2 316, 318 & 420 Lawn and Garden Tractors

020895

Repair Specifications/Repair Specifications

Item Specifications

MISCELLANEOUS Front Axle PTO Belt Tension Spring Length (420)

Horizontal Adjuster (Early) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 mm (1.600 in.)

Vertical Adjuster (Later) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 mm (1.380 in.)

Toe-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.8 mm (3/16 in.)

Mower Blade Spindles

Driven Sheave-to-Spindle Lock Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 N·m (103 lb-ft)

Blade-to-Spindle Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 N·m (54 lb-ft)

Mower Blade Jack Sheave

Jack Sheave-to-Spindle Lock Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 N·m (103 lb-ft)

Blade-to-Spindle Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 N·m (54 lb-ft)

50-Inch Mower Gear Case

Plug Installation Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.59 mm (0.062 in.) below gear case surface

Retainer Seal Installation Depth . . . . . . . . . . . . . . . . . . . . . . . . 2.54 mm (0.100 in.) below retainer surface

Retainer-to-Gear Case Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 N·m (22 lb-ft)

Pillow Block Seal Installation Depth . . . . . . . . . . . . . . . . . . . . . . . 2.54 mm (0.100 in.) below block surface

Pillow Block-to-Gear Case Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 N·m (22 lb-ft)

Early 60-Inch Mower Gear Case

Cap-to-Gear Case Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 N·m (22 lb-ft)

Output Shaft Endplay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025—0.076 mm (0.001—0.003 in.)

Input Shaft Backlash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.076—0.130 mm (0.003—0.005 in.)

Later 60-Inch Mower Gear Case

Gear Case Seal Installation Depth . . . . . . . . . . . . . . . . . . . . 2.54 mm (0.100 in.) below gear case surface

Retainer-to-Gear Case Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 N·m (22 lb-ft)

Pillow Block Seal Installation Depth . . . . . . . . . . . . . . . . . . . . . . . 2.54 mm (0.100 in.) below block surface

Pillow Block-to-Gear Case Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 N·m (22 lb-ft)

260 Rotary Mower Gear Case

End Cap-to-Gear Case Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 N·m (22 lb-ft)

Input Shaft Endplay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025—0.076 mm (0.001—0.003 in.)

Output Shaft Backlash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.076—0.130 mm (0.003—0.005 in.)

Housing-to-Gear Case Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 N·m (22 lb-ft)

MX,15901015,6 -19-20MAR95

10 15 3

TM1590 (17MAY95) 10-15-3 316, 318 & 420 Lawn and Garden Tractors

020895

Repair Specifications/Metric Series Torque Chart

METRIC BOLT AND CAP SCREW TORQUE VALUES

10 15

Class 4.8 Class 8.8 or 9.8 Class 10.9 Class 12.9

TS1163 -19-04MAR91

Size Lubricated

N·m lb-ft N·m lb-ft N·m lb-ft N·m lb-ft N·m lb-ft N·m lb-ft N·m lb-ft N·m lb-ft

M6 4.8 3.5 6 4.5 9 6.5 11 8.5 13 9.5 17 12 15 11.5 19 14.5 M8 12 8.5 15 11 22 16 28 20 32 24 40 30 37 28 47 35

M10 23 17 29 21 43 32 55 40 63 47 80 60 75 55 95 70

M12 40 29 50 37 75 55 95 70 110 80 140 105 130 95 165 120 M14 63 47 80 60 120 88 150 110 175 130 225 165 205 150 260 190 M16 100 73 125 92 190 140 240 175 275 200 350 255 320 240 400 300

M18 135 100 175 125 260 195 330 250 375 275 475 350 440 325 560 410 M20 190 140 240 180 375 275 475 350 530 400 675 500 625 460 800 580 M22 260 190 330 250 510 375 650 475 725 540 925 675 850 625 1075 800

M24 330 250 425 310 650 475 825 600 925 675 1150 850 1075 800 1350 1000 M27 490 360 625 450 950 700 1200 875 1350 1000 1700 1250 1600 1150 2000 1500 M30 675 490 850 625 1300 950 1650 1200 1850 1350 2300 1700 2150 1600 2700 2000

M33 900 675 1150 850 1750 1300 2200 1650 2500 1850 3150 2350 2900 2150 3700 2750 M36 1150 850 1450 1075 2250 1650 2850 2100 3200 2350 4050 3000 3750 2750 4750 3500

DO NOT use these values if a different torque value or tightening procedure is given for a specific application. Torque values listed are for general use

Dry

Lubricated

Dry

Lubricated

Dry

Lubricated

Dry

Make sure fasteners threads are clean and that you properly start thread engagement. This will prevent them from failing when tightening.

only. Check tightness of fasteners periodically.

Tighten plastic insert or crimped steel-type lock nuts Shear bolts are designed to fail under predetermined loads. Always replace shear bolts with identical property class.

to approximately 50 percent of the dry torque shown

in the chart, applied to the nut, not to the bolt head.

Tighten toothed or serrated-type lock nuts to the full

torque value. Fasteners should be replaced with the same or higher property class. If higher property class fasteners are used, these should only be tightened to the strength of the original.

“Lubricated” means coated with a lubricant such as engine oil, or fasteners with phosphate and oil coatings. “Dry” means plain or zinc plated without any lubrication.

DX,TORQ2 -19-20JUL94

TM1590 (17MAY95) 10-15-4 316, 318 & 420 Lawn and Garden Tractors

020895

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