Toro Sand Pro 3040 Service Manual page 111

Test Procedure
Sand Pro ® 3040 and 5040
20251SL Rev A
The implement/charge pump (P2) is part of the piston (traction) pump assembly.
The implement/charge pump is designed to satisfy the needs of the lift cylinder
(and steering cylinder on model 08745 machines) simultaneously at full speed
throttle. The Implement/Charge Pump (P2) Flow and Circuit Relief Test
compares fluid flow at No Load with fluid flow Under Load. A drop in flow under
load of more than 20% indicates the internal components of 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.
On model 08743 machines, the circuit relief valve is part of remote manifold near
the lift valve. On model 08745 machines, the relief valve for the steering and lift
circuit is integrated into the steering control valve.
If both steering and lift operations perform poorly, perform the implement/charge
pump (P2) flow test and the circuit relief valve test.
Special Equipment Required:
•
Flow meter with pressure gauge that has at least a 16 liter/minute (5
gallons/minute) capacity.
•
1 or 2 hydraulic test hoses
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 5–23).
3. Remove the center shroud.
4. Clean the fitting and the hydraulic hose on the right side of the hydraulic
pump shown; refer to
g355240
1. Elbow fitting at hydraulic pump
5. Disconnect the hydraulic hose and install the tester between the exposed
fitting and the disconnected hose. Make sure the tester is installed in the
Figure 39.
Figure 39
2. Hydraulic hose
Page 5–41 Hydraulic System: Testing the Hydraulic System
position.
FF
Testing the Hydraulic System