Toro 04384 Service Manual page 65

4. Attach a heavy chain to the rear of the machine frame
and an immovable object to prevent the machine from
moving during testing.
5. If machine has 3 wheel drive, block up the rear wheel
off the ground to allow flow through the rear wheel motor.
6. Chock front wheel being tested to prevent rotation of
the wheel.
7. Thoroughly clean junction of hydraulic lines and fit-
tings at the front wheel motor that is not being tested.
Disconnect hydraulic lines from front wheel motor that
is not being tested. Cap the disconnected hydraulic
lines and plug ports in wheel motor.
8. Thoroughly clean junction of hydraulic hose and the
upper hydraulic fitting on the front side of the piston
pump (Fig. 19). Disconnect hose from the upper hydrau-
lic fitting.
9. Install tester with pressure gauge and flow meter in
series with the pump and the disconnected hose (same
tester connections as Piston (Traction) Pump Flow
Test). Make sure the tester flow control valve is fully
open.
CAUTION
Use extreme caution when performing test. The
wheel being tested will be trying to move the ma-
chine.
10.Start engine and move throttle to high idle speed
(2710 + 50 RPM).
11. Slowly push traction pedal in forward direction until
1000 PSI (69 bar) is displayed on the tester pressure
gauge.
12.Wheel motor internal leakage will be shown on flow
meter in GPM. Flow should be less than 1.5 GPM for
the tested wheel motor.
13.Release traction pedal, rotate wheel being tested
and retest. Testing of wheel motor leakage in three (3)
different wheel positions will provide most accurate test
results.
14.Release traction pedal and shut engine off. Record
results of flow test.
15.If specification is not met, the tested wheel motor
needs to be repaired or replaced as necessary.
Greensmaster 3250--D
16.Test second front wheel motor. Reconnect hydraulic
lines to untested front wheel motor. Disconnect and cap
hydraulic lines to tested front wheel motor. Complete
steps 10 to 15 for the second front wheel motor.
17.If machine has 3 wheel drive, test rear wheel motor:
A. Both front wheel motors should have hydraulic
lines connected. Block up both front wheels off the
ground.
B. Attach a heavy chain to the rear of the machine
frame and an immovable object to prevent the ma-
chine from moving during testing.
C. Position rear wheel on the ground and chock rear
wheel to prevent it from turning.
Use extreme caution when performing test. The
rear wheel will be trying to move the machine.
D. Complete steps 10 to 15.
NOTE: The Piston (Traction) Pump Flow Test uses the
same tester connections as this wheel motor efficiency
test. If necessary, perform the piston pump flow test be-
fore removing the tester from the machine.
18.When wheel motor testing is completed, disconnect
tester from hydraulic fitting and hose. Reconnect hose
to piston pump fitting.
1. Piston pump
Page 4 - - 33
CAUTION
1
2
Figure 19
2. Upper hydraulic hose
Hydraulic System