Toro Groundsmaster 4300-D Service Manual page 115

Testing the Rear Wheel Motors
Groundsmaster ® 4300-D
16226SL Rev C
g212732
1. Upper hydraulic fitting
g217163
1. Left rear wheel motor
Hydraulic fluid flows through both front wheel motors (in parallel) before passing
through the rear wheel motors (in series). To accurately test the rear wheel
motors, the front wheel motors must be allowed to rotate.
1. To test the right rear wheel motor, disconnect the hose from the upper
hydraulic fitting of the wheel motor
2. To test the left rear wheel motor, disconnect the hose from the lower hydraulic
fitting of the wheel motor
3. Install a tester with the pressure gauge and flow meter in series between
the disconnected hydraulic hose and the rear wheel motor. Ensure that the
tester flow control valve is fully open.
Before lifting the machine with a jack, review and follow
Instructions (page 1–6).
4. Raise off the floor and support both front wheels.
5. Block the rear wheels with chocks to prevent wheel rotation.
6. With the engine running, press the engine speed switch to full speed (3,005
to 3,055 rpm) position. Use the InfoCenter to check that the engine speed is
correct.
Figure 57
2. Right rear wheel motor
Figure 58
2. Lower hydraulic fitting
(Figure
(Figure 58).
IMPORTANT
Page 4–53 Hydraulic System: Testing the Hydraulic System
57).
Jacking