Toro Groundsmaster 4100-D Service Manual

Also see for 30447: Operator's manual Installation instructions Installation instructions

Contents

Groundsmaster 4100--D/4110--DPage 5 -- 30Electrical SystemMain Power, Glow and Cab Power (Groundsmaster 4110--D) RelaysThe main power, glow and cab power relays are locatedat the power center behind the operator seat (Fig. 34).The wire harness is attached to these relays with a four(4) wire connector (Fig. 35).The main power relay is used to provide current to theTEC controllers and most of the fuse protected circuits(operator seat, power point and optional electric equip-ment). When the ignition switch is in the ON or STARTposition, the main power relay is energized.The glow relay is used to provide current to the engineglow plugs when the relay is energized by theTEC--5002 controller. The TEC--5002 controls and mon-itors the operation of the glow relay.The cab power relay on Groundsmaster 4110--D ma-chines is used to provide current to the operator cabelectrical components. When the ignition switch is in theON or START position, the cab power relay is energized.Testing1. Park machine on a level surface, lower cutting deck,stop engine, engage parking brake and remove keyfrom the ignition switch. Raise and support hood.2. To make sure that machine operation does not occurunexpectedly, disconnect negative (--) cable from bat-tery and then disconnect positive (+) cable from battery(see Battery Service in the Service and Repairs sectionof this chapter).3. Remove cover (item 1) and heat shield (item 11) frompower center and locate relay to be tested. If necessary,remove two (2) flange nuts and carriage screws that se-cure power center to tank support.4. Disconnect wire harness connector from relay. Re-move relay from mounting bracket for testing.NOTE: Prior to taking small resistance readings with adigital multimeter, short the meter test leads together.The meter will display a small resistance value (usually0.5 ohms or less). This resistance is due to the internalresistance of the meter and test leads. Subtract this val-ue from from the measured value of the component youare testing.5. Using a multimeter, verify that coil resistance be-tween terminals 86 and 85 is approximately 72 ohms.6. Connect multimeter (ohms setting) leads to relay ter-minals 30 and 87. Ground terminal 86 and apply +12VDC to terminal 85. The relay should make and breakcontinuity between terminals 30 and 87 as +12 VDC isapplied and removed from terminal 85.7. Disconnect voltage and test leads from the relay ter-minals. Replace relay if necessary.8. Secure relay to mounting bracket and connect wireharness connector to relay. Secure power center to tanksupport if it was removed. Install cover (item 1) and heatshield (item 11) to power center.9. Connect positive (+) cable to battery and then con-nect negative (--) cable to battery (see Battery Servicein the Service and Repairs section of this chapter).10.Lower and secure hood.1. Cover2. Screw3. Flange nut (2 used)4. Carriage screw (2 used)5. Screw6. Mount7. Lock nut8. Main power relay9. Glow relay10. Cab power relay11. Heat shield12. Screw (2 used)Figure 3423451876910FRONTRIGHT11 12Figure 3586 8785 3085 868730