Troy Bilt 700 Series Rider Service Repair Workshop Manual

Professional Shop Manual 700 Series Riding Tractors MTD Products Inc. - Product Training and Education Department 4 FORM NUMBER - 769-06667 11/2010 NOTE: These materials are for use by trained technicians who are experienced in the service and repair of outdoor power equipment of the kind described in this publication, and are not intended for use by untrained or inexperienced individuals. These materials are intended to provide supplemental information to assist the trained technician. Untrained or inexperienced individuals should seek the assistance of an experienced and trained professional. Read, understand, and follow all instructions and use common sense when working on power equipment. This includes the contents of the product’s Oper- ators Manual, supplied with the equipment. No liability can be accepted for any inaccuracies or omission in this publication, although care has been taken to make it as complete and accurate as possible at the time of publication. However, due to the variety of outdoor power equipment and continuing product changes that occur over time, updates will be made to these instructions from time to time. Therefore, it may be necessary to obtain the latest materials before servicing or repairing a product. The company reserves the right to make changes at any time to this publication without prior notice and without incurring an obligation to make such changes to previously published versions. Instructions, photographs and illustrations used in this publication are for reference use only and may not depict actual model and component parts. © Copyright 2010 MTD Products Inc. All Rights Reserved

I Chapter 1: Introduction 1 Professional Shop manual intent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Description of the 700 series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Model and Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Chapter 2: Engine Related Parts 5 Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Fuel tank removal/replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Chapter 3: Steering and Front Axle 9 Front wheel removal and axle bearing inspection . . . . . . . . . . . . . . . . . . . . 10 Left Front Axle Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Right Front Axle Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Pivot Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Installation notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Steering Gear Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Steering Shaft Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Steering Gear Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Steering Link Rod Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Front wheel alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Chapter 4: Body Panels 23 What is covered by this chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Hood Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Hood components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Seat and Fenders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Seat Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Seat bracket removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Fender Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Dash Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 To remove the lower dash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Table of Contents

II Chapter 5: Auto-drive CVT Drive and Brake System 35 About this chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 About the variable speed drive system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Externally repairable drive system problems: . . . . . . . . . . . . . . . . . . . . . . . . 37 Indications that a transaxle is not warrantable . . . . . . . . . . . . . . . . . . . . . . . 39 Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Brake adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Gear selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Adjusting Gearshift Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Adjusting the variable speed pulley control rod . . . . . . . . . . . . . . . . . . . . . . 43 Linkage: pedal shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Drive pedal and brake pedal shaft assembly removal . . . . . . . . . . . . . . . . . 46 Linkage: Cobra head to control rod tie plate and hex bushing . . . . . . . . . . . 49 Belt control: Upper drive belt idler arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Belt control: Servicing the variable speed pulley . . . . . . . . . . . . . . . . . . . . . 51 Belt control: Double idler tensioner pulleys . . . . . . . . . . . . . . . . . . . . . . . . . 53 Drive belt replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Transaxle removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Transaxle Repair - Bench Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Chapter 6: Hydrostatic Transaxle 75 Purging the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Transaxle control linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Cross-shaft and control lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Drive Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Clutch/Brake linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 Brake pedal assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Parking brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Parking brake adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

III Chapter 7: Electrical System 89 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 OCR Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Key switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 OCR Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 Identifying a faulty OCR module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 PTO switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 Brake switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 Park Brake Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 Reverse Safety Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Seat Safety Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 Starter solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 Lighting circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 Start Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 Run Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 Run Circuit / Reverse Caution mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Safety circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Charging circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Testing the charging system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 Electrical diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 Electrical environment: AC Vs. DC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 Ohm’s Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 Kirchhoff’s current law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 Kirchhoff’s voltage law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 How the system is wired together . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 Types of circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 Parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 Series/parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 Shorts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 Increased resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 The Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 Digital Multi-meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 Wiring diagram or schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Fused jumper wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Test lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Self-powered continuity lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Ammeters and specialized charging system testers . . . . . . . . . . . . . . . . . 128 Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 Charging the battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 Checking battery condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 Battery Testers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 Adjustable load testers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 Fixed load testers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

IV Conductance testers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 Battery discharge test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 Storage of batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 Electrical Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134 Voltage Drop Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 Testing switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 Diodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 Chapter 8: Cutting Decks 149 Cutting decks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 Deck Wash Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 Deck removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 Cleaning the Deck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 To clean the deck while it is removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 Cutting Blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 Blade Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 PTO Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154 To replace the PTO belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 Deck with a Timing Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 Pulleys and Spindles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 Blade Brake System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162 Leveling the deck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164 Side to Side Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164 Front To Rear Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 Deck Wheel Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 Deck lift shaft assembly bushings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167 Deck lift shaft assembly removal/replacement . . . . . . . . . . . . . . . . . . . . . 167 Deck lift links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 Manual PTO Blade Engagement Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 Cutting Deck Engagement Lever Replacement . . . . . . . . . . . . . . . . . . . . 170 Replacing the cutting deck engagement cable . . . . . . . . . . . . . . . . . . . . . . 171 Chapter 9: Maintenance Intervals 173 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 Engine maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 General maintenance tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174 The spark plug(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174 Air filter and foam pre cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 Oil change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176 Oil filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177 Fuel system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 Servicing the fuel system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 Fuel filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 Clean the engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179 Lubricate the pedal shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Introduction 1 Professional Shop manual intent This Shop Manual is intended to provide service dealers with an introduction to the mechanical aspects of the 700 series tractor. • Detailed service information about the engine will be provided by the engine manufacturer, in most cases. Disclaimer: The information contained in this shop manual is correct at the time of writing. Both the product and the information about the product are subject to change without notice. About the text format: NOTE: is used to point-out information that is relevant to the procedure, but does not fit as a step in the procedure. Bullet points: indicate sub-steps or points. Disclaimer: This Professional Shop Manual is intended for use by trained, professional technicians. • Common sense in operation and safety is assumed. • In no event shall MTD or Cub Cadet be liable for poor text interpretation, or poor execution of the procedures described in the text. • If the person using this manual is uncomfortable with any procedures they encounter, they should seek the help of a qualified technician or Cub Cadet Technical Support. Fasteners • Most of the fasteners used on the tractor are sized in fractional inches. Some are metric. For this reason, wrench sizes are frequently identified in the text, and measurements are given in U.S. and metric scales. • If a fastener has a locking feature that has worn, replace the fastener or apply a small amount of releas- able threadlocking compound such as Loctite® 242 (blue). • Some fasteners like cotter pins are single-use items that are not to be reused. Other fasteners such as lock washers, retaining rings, and internal cotter pins (hairpin clips) may be reused if they do not show signs of wear or damage. This manual leaves that decision to the judgement of the technician. ! DANGER Danger indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury. This signal word is to be limited to the most extreme situations Warning indicates a potentially hazardous situation that, if not avoided, could result in death of serious injury. ! WARNING Caution is used to point out potential danger to the technician, operator, bystanders, or sur- rounding property. ! CAUTION CHAPTER 1: INTRODUCTION

700 Series Lawn Tractor 2 Assembly Torque specifications may be noted in the part of the text that covers assembly, they may also be summarized in tables along with special instructions regarding locking or lubrication. Whichever method is more appropriate will be used. In many cases, both will be used so that the manual is handy as a quick-reference guide as well as a step-by- step procedure guide that does not require the user to hunt for information. The level of assembly instructions provided will be determined by the complexity and of reassembly, and by the potential for unsafe conditions to arise from mistakes made in assembly. Some instructions may refer to other parts of the manual for subsidiary procedures. This avoids repeating the same procedure two or three times in the manual. Description of the 700 series 1. Description: A new step-through rider platform was introduced for the ‘05 mowing season. It was designated as the 700 series rider. It is seen across many of the MTD brands and private labels. There are also several hood configurations.The serial number and date codes are the keys to obtaining proper parts and service information. Since that date, several drive systems have been used on this series. 2. Variations: Drive Systems The 700 series is currently available with three basic drive systems. The 700 refers to the 5th through 7th characters of the model number found under the seat. • 13AN772 G000 is a “770” series - 7 speed shift-on-the-go transmission NOTE: There is also a 760 series with a 6 speed shift-on-the-go transmission • 13WX78K S011 is a “780” series - autodrive variable speed CVT tractor • 13AR791 G790 is a “790” series - Hydrostatic drive tractor The 760-770 series is a shift-on-the-go system that uses a simple forward/neutral/reverse transaxle driven by two belts in a variable speed pulley. A dash mounted speed range control (sets speed of rider). A foot operated brake on the left side of the rider engages the drive when it is released. The 780 series uses a Autodrive system with the same transmission as the 770 series. The 780, like the 770, has the brake pedal on the left side of the tractor. A drive pedal on the right side of the tractor controls a variable-speed pulley (CVT) system that controls the ground speed of the tractor. The 790 series uses a hydrostatic transaxle. A pedal on the left side of the tractor operates the brake/clutch pedal while the ground speed and direction of the tractor is controlled by a fender mounted hand control lever.

Introduction 3 3. Variations: Cutting Decks Three decks sizes are currently available on the 700 series platform: 38”, 42” and 46” with twin blades. Within the different deck sizes you may find different configurations of belt routing, blade brakes, Idlers, spindles and blades. The eighth letter in the serial number indicates the deck used on the rider. Refer to the correct illustrated parts list when working on the deck and ordering parts. 4. Variations: Other The 700 series platform will accommodate a variety of single and twin cylinder engines, and a range of styles and brands will be applied to it. The steel dash panel is common to all 700 series, and plas- tic inserts will be used to match the different hoods used. 5. Spotter’s Guide: The 700 series is visibly similar to the existing step-through platform 600 and 610 series lawn tractors, but there are substantial differences. • Deck Engagement: The PTO belt is engaged on the 700 series using a lever on the right fender. Model and Serial Numbers The model and serial number tag can be found under the seat. The serial number is located to the right of the model number as shown above. The model number is 13AN772G000 The break down of what the number mean is as follows: 13.........................lawn tractor ...A.......................sales level ......N.....................engine code ........7...................tractor series ..........7................drive system ............2..............hood style ...............G ...........deck ...................000....customer number The serial number is 1C259B40136. The serial number reads as follows: 1...........................engineering level ..C.........................month of production (C = March) .....25....................day of the month .........9..................last digit of the year ...........B................plant it was built in ..............4.............assembly line number .................0136.....number of unit built Model number Serial number

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Troy Bilt 700 Series Rider Service Repair Workshop Manual

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