Toro Groundsmaster 4300-D Service Manual page 180

Installing the Rear Wheel Motor
Hydraulic System: Service and Repairs
Because of the internal differences in the wheel motors, do not
interchange the wheel motors on the machine (e.g., do not put the
right motor on the left side of the machine). If necessary, use the
Parts Catalog and Part Number on the wheel motor to identify the
right and left motors, there is also a yellow dot on the left motor.
1. If the hydraulic fittings were removed from the wheel motor, lubricate and
install new O-rings to the fittings. To properly align and install the fittings into
the wheel motor ports, use the marks that you made during the removal
process; refer to Installing the Hydraulic Fittings (SAE Straight Thread
O-Ring Fitting into the Component Port) (page
2. Position the rear wheel motor to the motor housing. Ensure that the ports in
the wheel motor are facing toward the rear of the machine.
3. Secure the wheel motor to the spindle with the 4 bolts and 4 lock washers.
Torque the bolts to 109 to 135 N∙m (80 to 100 ft-lb).
4. Remove the caps or plugs that were installed to the hydraulic tubes during
the removal process.
5. Lubricate and install new O-rings to the fittings on the wheel motor. Use the
labels that you attached during the removal process to correctly connect the
hydraulic tubes to the wheel motor fittings; refer to
Hose and Tube (O-Ring Face Seal Fitting) (page
6. Clean the tapers of the wheel hub and wheel motor shaft.
7. Position the woodruff key (item 8 in
motor shaft.
Do not use the removed locknut to secure the wheel hub to the
wheel motor.
8. Install the wheel hub onto the motor shaft and secure with new locknut (item
7 in Figure 93).
9. Install the rear wheel to the machine; refer to
10. Lower the machine to the ground.
11. Torque the locknut to 366 to 447 N∙m (270 to 330 ft-lb).
12. Fill the hydraulic tank with the correct quantity of new hydraulic fluid.
13. After you complete the assembly, ensure that the hydraulic tubes and fittings
do not contact anything through the full range of axle motion. Also, check
for any hydraulic-fluid leaks.
14. Operate the machine functions slowly until air is out of system; refer to
Charging the Hydraulic System (page
15. Start the engine, check for hydraulic-fluid leaks, repair any leaks as required,
and fill the hydraulic tank with the correct quantity of new hydraulic fluid
before returning the machine to service.
IMPORTANT
Figure
IMPORTANT
4–94).
Page 4–118
4–11).
Installing the Hydraulic
4–9).
93) to the keyslot in the wheel
Installing the Wheel (page
Groundsmaster
16226SL Rev C
6–6).
® 4300-D