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Belt guide TURF AND UTILITY EQUIPMENT Revised December CTABLE OF CONTENTS Page Air Compressors Belt Listing By Size - Belt Terminology Compact Utility Tractors - EZtrak Mowers Front Mowers Front Mount Mowers High Pressure Washers Hydraulic Tiller Introduc

TURF AND UTILITY EQUIPMENT Revised December CTABLE OF CONTENTS Page Air Compressors Belt Listing By Size - Belt Terminology Compact Utility Tractors - EZtrak Mowers Front Mowers Front Mount Mowers High Pressure Washers Hydraulic Tiller Introduction Lawn Edgers Lawn Garden Tractors - Lawn Tractors - Log Splitter Material Collection Systems Mowers Quik-Trak Mowers - Riding Mowers Rotary Tillers Sabre Lawn and Garden Tractors and Mowers - Sabre Snow Throwers Snow Blowers Sabre Walk-Behind Rotary Mowers Scotts Lawn and Garden Tractors and Mowers - Scotts Snow Throwers Snow Blowers Scotts Walk-Behind Rotary Mowers Snow Blowers Snow Throwers Special Cross Section - Sprayers Tractor Loader Backhoe Tractor Rotary Mowers Mid-Mount - Tractor Rotary Mowers -Point Hitch Troubleshooting V-Belt Wear Utility Tractors - Utility Vehicles - Walk-Behind Commercial Mowers - Walk-Behind Rotary Mowers Cycle ZTrak Mowers - BELT TERMINOLOGY TRACTION DRIVE BELTS Primary Belt - Engine output to variator input Secondary Belt - Variator output to transmission input MOWER DRIVE BELTS Primary Belt - Engine output to mower jacksheave Secondary Belt - Mower jacksheave to mower blade spindles CINTRODUCTION This book gives you belt product information part numbers and a list by size for most John Deere consumer and commercial equipment DESIGN The illustration below shows important areas of a typical V-belt cross section Each area plays an important role in belt performance TOP COVER TENSILE MEMBER CUSHION MEMBER SIDEWALL BOTTOM COVER WIDTH CORNER CONTOUR DEPTH OR THICKNESS The top section of the belt is the tension section It is rubber and stretches as the belt forms around the sheave The bottom section is called the compression section because it compresses when wedged into and shaped around the sheave The center section of the belt is the strength section It neither compresses nor stretches but the cords located in this area give the belt its tensile strength Without these cords a V-belt would be pulled apart The complete belt is covered by a tough fabric and rubber which protects the inner parts NOTE Some V-belts have a corrugated underside for greater exibility MAINTENANCE TENSION ??Too little tension causes slippage or slip-and-grab causing the belt to break If the belt does not break slip will cause excessive cover wear burned spots and overheating Too much tension causes belt overheating and excessive stretch as well as damage to drive components such as sheaves and shafts The extra tightness will also place heavier loads on the bearings Remember that V-belts should ride on the sides of standard sheaves not on the bottom of the groove WATCH THE TENSION ON A NEW BELT DURING THE FIRST HOURS OF OPERATION ??This is when the initial seating and stretch occurs ALIGNMENT ??Sheave alignment is important Be sure that the shafts are parallel and the belt aligns with each sheave CTROUBLESHOOTING V-BELT WEAR BASE CRACKING BASE CRACKING FABRIC RUPTURE SLIP BURN GOUGED EDGES RUPTURED CORDS COVER TEAR WORN SIDES Symptom Base cracking Base cracking Fabric rupture Cover tear Slip burn Gouged edge Ruptured cords Worn sides Probable Cause Solution Defective