Toro Sand Pro 3040 Service Manual page 100

Test Procedure (continued)
Hydraulic System: Testing the Hydraulic System
A. The piston (traction) pump charge relief valve is damaged. Replace or
repair the pump charge relief valve; refer to
Pump (page 5–74).
B. The in-line check valve/fitting (near the piston pump suction port) is faulty.
C. The piston (traction) pump implement/charge pump (P2) is faulty (reduced
lift circuit performance (and steering circuit performance on model 08745
machines) will also be affected. Test the implement/charge pump (P2)
flow; refer to Testing the Lift and Steering Circuit – Implement/Charge
Pump (P2) Flow and Circuit Relief (page
16. 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 6200 to
8275 kPa (900 to 1200 PSI) is reached on the flow meter pressure gauge.
17. Record reading on pressure gauge at the fluid cooler (not the pressure
gauge on the flow meter).
18. Release the traction pedal, move the throttle to low speed and set the key
switch to the O position.
FF
19. Charge pressure (under load) should not drop more than 20% when
compared to charge pressure (without load) recorded in step 15.
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 – Traction Pump (P1) Flow and Relief Pressure
(page 5–36).
20. After testing:
A. Remove the hydraulic tester and hoses then reconnect the hydraulic
hose and tube above the front wheel motor.
B. Remove the pressure gauge and tee then reconnect the hydraulic hose
at the fluid cooler.
C. Check and adjust the level of the hydraulic fluid in the hydraulic reservoir;
refer to the traction unit Operator's Manual.
D. Start the engine and check for any hydraulic fluid leaks. Repair hydraulic
leaks if necessary before returning the machine to service.
Page 5–30
Servicing the Piston (traction)
5–40).
Sand Pro ® 3040 and 5040
20251SL Rev A