Toro Field Pro 6040 Service Manual page 102

Test Procedure
Hydraulic System: Testing the Hydraulic System
The gear pump is designed to satisfy the lift cylinder needs. The Gear Pump
Flow Test compares fluid flow at No Load with fluid flow Under Load. A drop
in flow under load of more than 15% indicates the gears and wear plates in
the pump have worn. Continued operation with a worn pump can generate
excessive heat and cause damage to the seals and other components in the
hydraulic system. If both charge circuit pressure and lift operations perform
poorly, perform the gear pump flow test.
If lift operation is unsatisfactory, check the lift circuit relief valve (RV1); refer to
Testing the Lift and Tilt Angle Circuits – Relief Valve (RV1) Pressure (page
Special Equipment Required:
•
Flow meter with pressure gauge that has at least a 38 L/minute (10
gallons/minute) capacity.
•
1 Hydraulic Hose
•
Non-contact tachometer (photo tach)
1. Park the machine on a level surface, lower any attachments, engage the
parking brake and set the key switch to the O
2. Read and adhere to the information provided in
(page 5–19).
3. Remove the hood.
4. Clean the fitting and the hydraulic hose end at the control valve "P" port.
g417892
1. Control valve assembly
2. "P" port
5. Disconnect both ends of the hydraulic hose and remove the tube from the
machine.
6. Install a hydraulic test hose to the exposed fitting at the control valve.
7. Install a hydraulic tester between the disconnected hydraulic hose and the
test hose. Make sure the tester is installed in the correct flow direction
(toward the control valve) and the tester flow control valve is fully open.
Figure 36
3. Hydraulic hose
Page 5–36
position.
FF
Testing the Hydraulic System
Field Pro® 6040
22267SL Rev A
5–38).