Grasshopper 721D - Table of Contents

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INTRODUCTION 2
SYMBOLS USED ON WIRING DIAGRAMS 5
SWITCH FUNCTIONS 6-7
TROUBLESHOOTING CONTROL RELAYS
Model 720, 721, and 725 ........................................................................................... 8
Model 718D and 721D............................................................................................... 8
Control relay - Model 720, 718D, 721, 721D, and 725 .............................................. 9
Circuit board diode problems - Model 720, 718D, 721, 721D, and 725..................... 9
FUSE BLOCK DIAGRAMS 10
TESTING SAFETY SYSTEM FOR PROPER OPERATION
Model 612, 614, 616, 718, 718K and 720K ............................................................. 11
Model 720 (Onan), 718D, 721D, 721 and 725 ........................................................ 12
BATTERY CHARGING SYSTEM
Model 718 (Briggs & Stratton Twin-II engine) .......................................................... 13
Model 612, 614, 616, and 718 (Briggs & Stratton Vanguard engines) and
Model 718K and 720K (Kohler Magnum & Command engines) .............................. 14
Model 720 (Onan engine) ........................................................................................ 15
Model 718D, 721, 721D, and 725 (All Kubota engines) .......................................... 16
ENGINE WILL NOT CRANK
Model 612, 614, and 616 (Briggs & Stratton engines)........................................ 18-19
Model 718 (Briggs & Stratton Vanguard engines) .............................................. 20-21
Model 718K (Kohler Magnum engine) ................................................................ 22-23
Model 718K and 720K (Kohler Command engines) ........................................... 24-25
Model 720 (Onan engine) ................................................................................... 26-27
Model 718D, 721, 721D, and 725 (All Kubota engines) ..................................... 28-29
ENGINE WILL CRANK, BUT NOT START
Model 612, 614, 616, 718, 718K, and 720K (All engines) ....................................... 30
Model 720 (Onan engine) ........................................................................................ 31
Model 721 and 725 (Kubota gasoline engines) ....................................................... 32
Model 718D and 721D (Kubota diesel engines) ...................................................... 33
ENGINE STARTS, BUT DIES
WHEN LEVERS ARE BROUGHT IN OR PTO SWITCH IS ENGAGED
Model 612, 614, 616 and 718 .................................................................................. 34
Model 718K and 720K ............................................................................................. 35
Model 720 (Onan engine) ........................................................................................ 36
Model 718D, 721, 721D, and 725 (All Kubota engines) .......................................... 37
(continued)
TABLE OF CONTENTS