3WD Kit

1. Park the machine on a level surface.

2. Engage the parking brake.

3. Lower the cutting units.

4. Shut off the machine and remove the key.

5. Disconnect the main-power connectors; refer to your machine Operator’s Manual.

Raise the machine; refer to the pre-maintenance section of your machine Operator’s Manual.

1. Remove the 4 lugnuts that secure the wheel to the wheel-hub assembly (Figure 1).

   

   Figure 1

   1. Lugnut
   2. Tire
   3. Wheel-hub assembly

2. Remove the wheel from the machine (Figure 1).

Remove the existing wheel-hub assembly by removing the bolts and nuts that secure the assembly to the castor fork (Figure 2).

Figure 2

1. Nut
2. Wheel-hub assembly
3. Castor fork
4. Bolt

Parts needed for this procedure:

1. Remove the snap ring (shown in Figure 3) from the axle.

2. Remove the hub assembly (shown in Figure 3) from the gearbox.

3. Slide the gearbox into the caster fork.

   Note: Observe the correct orientation of the gearbox as shown in Figure 3. The axle shaft should point toward the left side of the machine.

   

   Figure 3

   1. Bolt (M12)
   2. Castor fork
   3. Gearbox
   4. Dust cap with O-ring
   5. Snap ring
   6. Thrust washer
   7. Bearing
   8. Hub assembly

4. Use 4 bolts (M12) to secure the gearbox to the castor fork (A in Figure 3).

5. Torque the bolts (M12) to 81 to 95 N∙m (60 to 70 ft-lb).

6. Install the hub assembly, snap ring, and dust cap with O-ring on the axle shaft (B in Figure 3).

   When you install the snap ring, compress the wave washer in the hub assembly.

   Note: If the thrust washers and bearing are removed from the hub assembly, assemble them as shown in Figure 3.

7. Remove the plug from the top of the gearbox (A of Figure 4).

   

   Figure 4

   1. Plug
   2. Vent hose and fitting

8. Secure the vent hose and fitting to the gearbox (B of Figure 4).

Parts needed for this procedure:

Use 2 bolts (3/8 x 3 inches), 2 flat washers, 2 spacers, and 2 flange nuts (3/8 inch) to secure the harness bracket to the caster fork (Figure 5).

Figure 5

1. Flange nut
2. Spacer
3. Harness bracket
4. Washer
5. Bolt

Parts needed for this procedure:

1. Raise the hood.

2. Route the gearbox wire harness toward the hood as shown in Figure 6.

   

   Figure 6

   1. Gearbox wire harness
   2. Gearbox
   3. Harness bracket

3. Route the remaining gearbox-wire-harness connectors toward the steering motor (Figure 7)

   

   Figure 7

   1. Steering column
   2. Machine wire harness
   3. 4-socket connector (machine wire harness)
   4. 4-pin connector (gearbox wire harness)
   5. Gearbox wire harness
   6. Push-mount fastener
   7. 2-socket connector (machine wire harness)
   8. 2-pin connector (motor gearbox wire harness)

4. Cut the tie wrap that secures the machine harness to the bracket, leaving the push-mount in place (Figure 7). Discard the tie wrap.

5. Connect the gearbox connectors to the machine wire-harness connectors (Figure 7):

   • 2-pin connector of the gearbox to the 2-socket connector of the machine wire harness

   • 4-pin connector of the gearbox to the 4-socket connector of the machine wire harness

6. Wrap the extra machine wire harness slack around the steering motor as shown in Figure 7.

7. Using the tie wrap supplied in the kit, secure the gearbox harness to the push-mount as shown in Figure 7.

8. Close the hood.

Grease the hub assembly; refer to Greasing the Hub Assembly.

1. Use the previously removed lugnuts to secure the wheel to the hub (Figure 8).

   

   Figure 8

   1. Lugnut

2. Torque the lugnuts (in a crossing pattern as shown in Figure 9) to 108 to 122 N∙m (80 to 90 ft-lb).

   

   Figure 9

Parts needed for this procedure:

Install the fuse to the designated 3-wheel-drive slot on the reel-drive-circuit fuse block; refer to the electrical system maintenance section in your machine Operator’s Manual.

The 3-wheel-drive mode should automatically enable when you install the gearbox-wire-harness connections to the machine wire harness.

To ensure that the 3-wheel-drive mode is activated, navigate to the 3WD KIT option in the SETTINGS menu of your InfoCenter. The item selected/active icon indicates that 3-wheel-drive model is activated.

1. Lower the machine to the ground.

2. Connect the main-power connectors; refer to your machine Operator’s Manual.

Use No. 2 lithium grease to lubricate the hub assembly. Refer to Figure 10 for the location of the hub-assembly grease fitting.

Figure 10

1. Grease fitting

Fluid specification: SAE 80W-90

Gearbox fluid capacity: approximately 1.2 L (40 fl oz)