Toro Groundmaster Series Service Manual page 125

Test Procedure (continued)
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A
C. Record the tester pressure and flow readings.
11. Verify the pump flow Under Load as follows:
A. Slowly press the traction pedal to fully F
B. Apply an additional load of 8,274 to 12,410 kPa (1,200 to 1,800 psi)
by slowly closing the flow meter.
C. Record the tester pressure and flow readings under load.
12. Verify the traction relief valve (R1) operation as follows:
A. With the traction pedal in the N
flow control valve.
B. Slowly press the traction pedal toward the F
C. The system pressure should reach 25,682 to 26,096 kPa (3,725 to 3,785
psi) before the relief valve opens. Record the tester pressure reading.
Note: The relief valve setting is 22,925 kPa (3,625 psi). An additional
690 to 1,100 kPa (100 to 160 psi) is necessary to overcome system
charge pressure before the relief valve opens.
D. Release the traction pedal, open the flow control valve fully, move the
throttle to low speed, and set the key switch to the O
13. If the relief pressure can not be met or is greater than specified, the traction
relief valve is damaged and should be replaced.
14. The under load test flow reading (step 11) should not drop more than 12%
when compared to the no load test flow reading (step 10). A difference of
more than 12% (Under Load > No Load X 0.88) may indicate the hydraulic
pump is worn and should be replaced or repaired; refer to
Pump (P1) (page 5–70)
5–73).
15. After testing:
A. Remove the hydraulic hoses and tester.
B. Install the hydraulic tube previously removed.
C. Remove the jack stands and lower the machine to the ground.
D. Check and adjust the level of the hydraulic fluid in the hydraulic reservoir;
refer to the traction unit Operator's Manual.
E. Start the engine and check for any hydraulic fluid leaks. Repair hydraulic
leaks if necessary before returning the machine to service.
position, fully close the flow meter
EUTRAL
or Servicing the Traction (piston) Pump (P1) (page
Page 5–39 Hydraulic System: Testing the Hydraulic System
position.
ORWARD
position.
ORWARD
position.
FF
Piston (traction)