Toro ProLine H800 Service Manual page 123

Test Procedure (continued)
ProLine H800
19241SL Rev A
11. Verify the pump flow under load as follows:
Do not close the tester valve fully when performing this test. In this
test, the hydraulic tester is positioned in an unprotected part of the
steering circuit.
Pump damage can occur if the fluid flow is fully restricted by fully
closing the tester flow control valve.
A. Monitor the tester pressure gauge carefully while you slowly close the
flow control valve until you get 75 bar (1088 psi).
B. Record the tester pressure and flow readings under load.
12. Move the throttle to low speed (1,500 to 1,650 rpm) position and shut off
the engine.
13. The under load test flow reading (step 11B) should not drop more than 15%
when compared to the no load test flow reading (step 10A). A difference in
flow of more than 15%, or the inability to achieve specified pressure may
indicate:
A. A restriction in the pump inlet line.
B. The charge pump is worn and should be repaired or replaced; refer to
Servicing the Gear Pump (page
14. After you complete the testing, shut off the engine, and then release pressure
from the hydraulic system; refer to
System (page 5–5).
15. Disconnect the tester, and connect the removed hydraulic tube.
16. Start the engine, check for hydraulic-fluid leaks, repair any leaks as required,
and fill the hydraulic tank with the correct quantity of new hydraulic fluid
before returning the machine to service.
CAUTION
5–88).
Releasing Pressure from the Hydraulic
Page 5–55 Hydraulic System: Testing the Hydraulic System