Toro Groundmaster Series Service Manual page 113

Test Procedure (continued)
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A
5. Clean the fittings and the hydraulic tube shown; refer to
6. Remove the hydraulic tube and use 2 hydraulic hoses to install the tester to
the exposed fittings. Make sure the tester is installed in the correct flow
direction (toward the wheel motors) and the tester flow control valve is fully
open.
7. Attach a heavy chain to the rear of the machine frame and an immovable
object to prevent the machine from moving during testing.
8. Block the wheels with chocks to prevent the wheel rotation during testing.
9. Start the engine and run it at low-idle speed. Correct any hydraulic fluid leaks
at the test connections before continuing the test.
10. Start the engine and move the throttle to the full speed:
• Model 31900 and 31901 = 3235 rpm
• Model 31902 and 31903 = 3150 rpm
• Model 31907 and 31909 = 3235 rpm
11. Make sure hydraulic fluid is at normal operating temperature by operating the
machine for approximately 10 minutes.
12. Use the TDM display/controller screen to verify the engine speed.
13. Record the reading on the pressure gauge at the G2 port of the main
manifold (not the pressure gauge on the flow meter). The charge pressure
(without load) should read 895 to 1035 kPa (130 to 150 psi). If the charge
relief pressure specification is not met, consider the following:
A. The hydraulic pump charge relief valve (R3) is damaged. Replace or
repair the hydraulic pump charge relief valve; refer to
Traction (piston) Pump (P1) (page
B. Gear pump (P2) is faulty (steering and lift circuit performance will also be
affected). Test gear pump (P2) flow; refer to
Circuit – Gear Pump (P2) Flow and Circuit Relief Valve (page
C. Sit in the operator's seat, release the parking brake, and apply a load to
the traction pump by slowly depressing the forward traction pedal until
6895 to 10342 kPa (1000 to 1500 PSI) is reached on the flow meter
pressure gauge.
14. Record reading on pressure gauge at the G2 port of the main manifold (not
the pressure gauge on the flow meter).
15. Release the traction pedal, move the throttle to low speed and set the key
switch to the O position.
FF
16. Charge pressure (under load) should not drop more than 20% when
compared to charge pressure (without load) recorded in step 13.
If specifications are not met, leave the test equipment installed and perform
the Piston (traction) Pump (P1) Flow and Relief Pressure Test as described
in Testing the Traction Circuit – Piston (traction) Pump (P1) Flow and Relief
Pressure (page 5–37).
17. After testing:
A. Remove the hydraulic hoses and tester.
B. Install the hydraulic tube previously removed.
C. Disconnect the pressure gauge from the diagnostic fitting at the main
manifold.
D. Check and adjust the level of the hydraulic fluid in the hydraulic reservoir;
refer to the traction unit Operator's Manual.
5–73).
Page 5–27 Hydraulic System: Testing the Hydraulic System
Figure 29.
Servicing the
Testing the Steering and Lift
5–40).