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Tire Maintenance Manual TIRE MAINTENANCE MANUAL To The Owner/Operator Off-the-road tires are expensive pieces of equipment They are engineered and built with massive strength to support today’s equipment. This equipment is carrying ever increasing heavier loads at higher speeds and over longer dis- tances than ever before. Years of research and development have resulted in tires that can offer long service lives under these conditions. High strength carcasses have been developed to offer more load carrying capacity. New, tougher, higher quality components have improved durability. Improved rubber technology has helped to improve carcass durability, tread wear and hazard resistance ability. Still, there is a limit to the abuse and punishment any tire will take. Too many end up on a scrap pile because operators ignore common sense driving and operational practices. Others go out of service prematurely because they were not properly maintained. This manual, based on long term, extensive OTR field experience and practice, is designed to provide the information needed to help achieve maximum service life for both the end user and the equipment manufacturer. If followed, these recommendations will also help lower ton mile or tonne kilometer costs, improve equipment productivity and promote operating profits. This Booklet AppliesTo EarthmoverTires And Their Applications Only. It Does Not ApplyTo OtherTire Lines And Applications 1 CONTENTS Section I - Maintenance and Operations Construction Features ..................................................................................... 4 Basic Factors in Tire Maintenance.....................................................................5 Tires and Operating Conditions .........................................................................7 Project/Mine Manager and Job Superintendent Responsibilities ......................7 Engineering Department Responsibilities..........................................................7 Operations/Production Department Responsibilities .........................................8 Conscientious Operation by Drivers ...............................................................10 Shovel/Wheel Loader Operators ....................................................................10 Loader/Dozer Operators .................................................................................11 Grader Operators ............................................................................................11 Watertruck or Wagon Operators .....................................................................12 Scraper Operators ...........................................................................................12 Tire Department Responsibilities ....................................................................12 Overinflation/Underinflation ............................................................................12 Correct Tire Inflation / Proper Tire Inflation......................................................14 Essential Parts of a sound Inflation Maintenance Program.............................15 Matching of Tires on Rear Duals ....................................................................16 How to Calculate Loads and Load Distribution................................................18 Burned Beads .................................................................................................19 Repairs ...........................................................................................................21 Recapping........................................................................................................22 Handling and Storage of Tires, Tubes and Rims .............................................22 New Tires.........................................................................................................22 Used Tires .......................................................................................................23 Mounted Tires .................................................................................................23 Tubes ..............................................................................................................23 Section II - Procedure for Changing Tires and Tubes Nitrogen Inflation..............................................................................................24 Tire Changing Equipment and Tools................................................................25 Safety Instructions ...........................................................................................26 General............................................................................................................26 Demounting .....................................................................................................26 Inspection ........................................................................................................27 Mounting and Inflation .....................................................................................29 Operation ........................................................................................................31 Servicing Tire and Rim on Machine.................................................................33 Demounting Procedures..................................................................................35 Demounting Instructions - Semi Drop-Center Wheels.....................................36 Demounting Instructions - Single Piece Wheels..............................................38 Horizontal Demounting 25”- 49” Diameter Rims..............................................40 2 Horizontal Demounting 51” and Larger HDT Rims ..........................................42 Vertical Demounting Tires on a Machine ........................................................44 Demounting Tube-Type Off-The-Highway Tires ..............................................46 Inflation Procedures for Proper Mounting........................................................46 Mounting Off-The-Road Tires .........................................................................47 Mounting Bias Off-The-Road Tires on EM Rims..............................................49 Mounting Radial Off-The-Road Tires on EM Rims ..........................................52 Mounting Radial Off-The-Road Tires on Single Piece Wheels ........................55 Mounting Tires on a Machine ..........................................................................57 Mounting Tube-Type Off-The-Highway Tires ..................................................60 Section III - Tire Selection for Expected Service Conditions Tire Selection Criteria .....................................................................................61 Higher vs. Lower Inflation Pressure. ...............................................................62 Ton Mile Per Hour (TMPH/TKPH) Requirement ..............................................63 The Work Capability Factor (WCF)..................................................................65 Job Conditions ................................................................................................67 Ballasted Tires .................................................................................................68 Earthmover Tires Bias Construction – Haulage Service .............................................................71 Bias Construction – Haulage - Scraper Service ..............................................72 Bias Construction – Dozer/Loader Service .....................................................73 Bias Construction – Grader Service. ..............................................................75 Bias Construction – Mine Service ...................................................................76 Bias Construction – Port and Container Service ............................................76 Radial Construction – Scraper Service ...........................................................77 Radial Construction – Articulated Dump Truck Service ..................................78 Radial Construction – Haulage Service ..........................................................79 Radial Construction – Dozer/Loader Service...................................................80 Radial Construction – Loader/Underground Mine Service ..............................82 Radial Construction – Mobile Crane Service...................................................82 Radial Construction – Grader Service ............................................................83 Section IV - Load and Inflations For Goodyear Off-The-Road Tires Index ...............................................................................................................84 3 SECTION 1 Construction Features Basic Design Earthmover tires are produced in three basic constructions: • Bias • Bias/Belted • Radial All share a common nomenclature. Tread The part of the tire in contact with the ground. It must provide traction, long wear and cut resistance. The tread depth and de- sign vary based on site and application. Fig. 1 BiasTire Carcass Contains the inflation medium. The greater its strength, the greater the pressure it can hold. Bias and bias/belted tire car- casses use many angled plies of fabric to achieve strength. Radials have one ply of steel wire. Breakers (Belts) These are placed between the tread and carcass. They help to join these parts. They also distribute road shock to protect the carcass. In bias/belted and radial construc- tions, they control the diameter of the tire.
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