Toro Greensmaster 3120 Service Manual page 110

Steering/Lift Circuit Testing – Lowering Cutting Units Relief
Valve Test (continued)
Hydraulic System: Testing the Hydraulic System
Special Equipment Required:
•
Flow Meter with Pressure Gauge that has at least a 16 LPM (5 GPM) capacity.
•
Phototach (non−contact tachometer).
1. Park machine on a level surface with the cutting units lowered. Make sure
engine is OFF and the parking brake is engaged.
2. Read and adhere to the information provided in
(page 4–35).
3. Measure and record the system charge pressure (without load). Refer to
Traction Circuit Testing – Charge Pressure Test (page 4–38)
information.
g216910
1. Gear pump section (P3)
4. Disconnect hose connection on the bottom of gear pump (P3); refer to
43.
5. Install tester between the gear pump and the disconnected hose. Make
sure the tester is installed in the correct flow direction and the tester flow
control valve is fully open.
6. Start engine. Move throttle to full speed (2850 ± 50 RPM).
7. Make sure hydraulic fluid is at normal operating temperature by operating the
machine for approximately 10 minutes.
8. Verify and record engine speed with a phototach.
9. Make sure that cutting units are fully lowered and then engage the cutting
units.
Figure 43
2. Hydraulic hose
Page 4–64
Testing the Hydraulic System
for additional
Greensmaster 3120
17230SL Rev C
Figure