Toro ProLine H800 Service Manual page 122

Test Procedure (continued)
Hydraulic System: Testing the Hydraulic System
1. Park the machine on a level surface with the PTO switch off, lower the cutting
deck, shut off the engine, and set the parking brake.
2. Read all Warning, Cautions, and precautions listed at the beginning of this
section.
Before opening the hydraulic system, operate all the hydraulic
controls to release system pressure and avoid injury from the
pressurized hydraulic fluid; refer to
Hydraulic System (page
3. Raise and support the operator seat, remove the seat plate to get access to
the hydraulic pump assembly.
4. Clean the junction of the hydraulic hose and right side fitting on the pump.
Disconnect the hose (item 13 in
fitting.
Ensure that the fluid flow indicator arrow on the flow meter is
showing that the fluid will flow from the hydraulic tube, through the
tester and into the pump.
5. Install a tester with the pressure gauge and flow meter in series between the
pump fitting and the disconnected hose. Ensure that the flow control valve
on the tester is fully open.
6. Ensure that the hydraulic fluid is at normal operating temperature by
operating the machine for at least 10 minutes.
7. Ensure that the traction pedal is in the NEUTRAL position, steering wheel is
stationary, and parking brake is set.
8. Start the engine and run it at low-idle speed (1,500 to 1,650 rpm). Check for
hydraulic-fluid leaks from the test connections and correct before continuing
the test.
9. With the engine running, move the throttle to full speed (3,210 rpm) position.
Use a phototac to check that the engine speed is correct.
10. Verify the pump flow at no load as follows:
A. Record the tester pressure and flow readings at no load.
B. Unrestricted pump output should be approximately 15 LPM (4 GPM).
CAUTION
Releasing Pressure from the
5–5).
Figure 57) from the right side of the pump
IMPORTANT
Page 5–54 ProLine H800
19241SL Rev A