Form No. 3429-577 Rev A Contactor Kit Groundsmaster® 5900 or 5910 Rotary Mower Model No. 139-1030 Installation Instructions Installation Loose Parts Use the chart below to verify that all parts have been shipped. Procedure 1 2 3 4 5 6 7 8 9 10 11 12 © 2019—The Toro® Company 8111 Lyndale Avenue South Bloomington, MN 55420 Description Use Qty. No parts required – Prepare the machine. No parts required – Disconnect the battery. No parts required – Remove the side panels.
1 3 Preparing the Machine Removing the Side Panels No Parts Required No Parts Required Procedure Procedure 1. Park the machine on a level surface. 2. Engage the parking brake. 3. Lower the cutting units. 4. Shut off the engine and remove the key. 1. Loosen the 2 knobs that secure the left and right side panels to the machine (Figure 2). 2 Disconnecting the Battery g251780 Figure 2 Right side panel shown No Parts Required Procedure 1. 1. Side panel Open the hood (Figure 1). 2. 2.
. Remove the wire connectors (labeled COIL + [28V MASTER CONTACTOR ] and COIL - [28V MASTER CONTACTOR ]) from the solenoid (Figure 4). 4. Remove the red insulator and ring terminal (labeled SOLENOID LINE OUT [28V MASTER CONTACTOR ]) from the solenoid (Figure 5). g282710 Figure 5 g285045 1. Nut 2. Ring terminal—SOLENOID LINE OUT [28V MASTER CONTACTOR ] Figure 3 1. 2. Open the fuse-holder cover (Figure 4). Remove the 2 ring terminals from the left post of the fuse holder (Figure 4). 5. 3.
5 Installing the Contactor Parts needed for this procedure: 1 Contactor 1 Contactor mount 1 Cable 4 Nut (1/4 inch) 2 Nut (5/16 inch) 2 Flange bolt 2 Carriage bolt g282537 Figure 8 1. Contactor Procedure 1. 3. Nut (1/4 inch) 2. Flange bolt Use 2 carriage bolts and 2 nuts (1/4 inch) to secure the contactor mount to the bracket (Figure 7). 3. Use a nut (5/16 inch) to secure the end of the cable with the boot attached to the contactor (Figure 9). g282536 Figure 7 g282535 1.
g282534 g282538 Figure 11 Figure 10 1. Fuse-holder cover 1. Ring terminal—28V + FUSE 3. Wire connector—COIL + and ring terminal—battery [28V MASTER CONTACTOR ] cable 2. Nut 4. Wire connector—COIL [28V MASTER CONTACTOR ] 6. Install the wire connector labeled COIL - [28V MASTER CONTACTOR ] to the right post at the top of the contactor (Figure 10). 7. Assemble the ring terminal labeled 28V + FUSE of the machine wire harness onto the left post of the fuse holder (Figure 10). 8.
Removing the I-Terminal Wire from the Alternator Parts needed for this procedure: 1 Wire cap 1 Wire label 1 Vinyl cap 1 Nut (M5) 1 Cable tie Procedure 1. g284893 Figure 13 Locate and remove the I-terminal wire (green wire) on the alternator (Figure 12). 1. Vinyl cap 4. Alternator post—I terminal 2. Wire cap 5. Nut (M5) 3. Wire label 4. Install the wire label onto the wire (Figure 13). 5. Use a cable tie to secure the wire to the wire harness. 6.
Removing the Diode Parts needed for this procedure: 1 Molded cap Procedure For machines with a serial number of 403444961 or below: 1. Locate the fuse block on the right side of the machine (Figure 14). g285043 Figure 15 1. Diode 3. Molded plug 2. Connector—P103 g283947 Figure 14 1. Diode 2. Fuse-block cover 3. Fuse block 2. Access the fuse block by pulling the fuse block down from the cover (Figure 14). 3. Remove the diode from the fuse block (Figure 14) and discard it. 4.
3. Remove the ring terminal for the yellow wire of the machine wire harness from the left post of the fuse holder (Figure 17). 4. Remove the fuse (100 A) from the fuse holder (Figure 17) and discard it. 5. Install the fuse (60 A) to the fuse holder (Figure 17). 6. Assemble the ring terminal for the yellow wire of the machine wire harness onto the left post of the fuse holder (Figure 17). Procedure 7. Assemble the 2 nuts onto the left and right posts of the fuse-holder (Figure 17).
11 Installing the Decal Installing the Side Panels and Closing the Hood Parts needed for this procedure: 1 Fuse decal (Part No. 139-1031) No Parts Required Procedure Procedure 1. Remove any dust and debris from the existing fuse-decal surface; refer to Figure 19 for the decal location. g282717 Figure 19 1. Contactor 2. 2. Decal location Install the fuse decal (Part No. 139-1031) over the existing fuse decal (Figure 19).
12 Verify the 28-V System and Cab-Power Function No Parts Required Procedure Important: Ensure that all wiring is routed away from any hot, sharp, or moving parts on the machine. 1. Ensure that the machine software is updated to the latest version (i.e., Rev K or higher). 2. Use the InfoCenter to confirm that the 28-V system and cab power (if equipped) are charging.
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