Chapter 5
Electrical System
Table of Contents
ELECTRICAL SCHEMATIC, CIRCUIT DIAGRAMS,
AND WIRE HARNESS DRAWINGS . . . . . . . . . . . . 2
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 4
Starting Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
General Run & Transport Problems . . . . . . . . . . . . 5
Cutting Deck Operating Problems . . . . . . . . . . . . . 6
ELECTRICAL SYSTEM QUICK CHECKS . . . . . . . . 7
Battery Test (Open Circuit Test) . . . . . . . . . . . . . . . 7
Check Operation of Interlock Switches . . . . . . . . . 7
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Wing Deck Position Switches . . . . . . . . . . . . . . . . . 8
Cutting Deck Raise and Lower Switches . . . . . . . 9
COMPONENT TESTING . . . . . . . . . . . . . . . . . . . . . . 10
Ignition Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Warning Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
PTO Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Audio Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Transport, Alarm Silence, and
Hour Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Glow Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Start, Engine Shutdown, Seat, PTO, Alarm,
Down Latching, and Over Temperature Relays 17
Hydraulic Valve Solenoids . . . . . . . . . . . . . . . . . . . 18
Engine Run Solenoid . . . . . . . . . . . . . . . . . . . . . . . 19
Fuel Sender . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Fuel Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Fuel Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Glow Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Temperature Sender . . . . . . . . . . . . . . . . . . . . . . . . 24
High Temperature Shutdown Switch . . . . . . . . . . 25
Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . . . 26
Traction Neutral Switch . . . . . . . . . . . . . . . . . . . . . 27
Diode Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Diode Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . 28
Wing Deck Position Switches . . . . . . . . . . . . . . . . 29
Cutting Deck Raise and Lower Switches . . . . . . 30
SERVICE AND REPAIRS . . . . . . . . . . . . . . . . . . . . . 31
Hydraulic Valve Solenoids . . . . . . . . . . . . . . . . . . . 31
Battery Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Battery Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Battery Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Temperature Override Switches . . . . . . . . . . . . 14
Seat Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Parking Brake Switch . . . . . . . . . . . . . . . . . . . . . . . 15
Groundsmaster 4100−D
Page 5 − 1
Electrical System
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