Toro Groundsmaster 360 Service Manual page 119

Test Procedure (continued)
Groundsmaster 360
16225SL Rev C
4. Read all Warning, Cautions, and precautions listed at the beginning of this
section.
5. Clean the deck lift manifold around the plug in port 3 on the rear of the deck
lift manifold (Figure
6. Install a 34,500 kPa (5,000 psi) pressure gauge into the deck lift manifold
port 3.
7. Start the engine and run it at low-idle speed (1,400 rpm). Check for
hydraulic-fluid leaks from the test connections and correct before continuing
the test.
8. With the engine running, press the engine speed switch to full speed (3,000
rpm) position.
Press the lift switch to the R
relief pressure reading. Holding the lift switch in the R
for an extended period may damage the circuit components.
9. Monitor the pressure gauge carefully while you press the lift switch to the
R position.
AISE
10. When the lift cylinder is fully extended (deck raised) and the implement relief
valve lifts, the pressure gauge needle will momentarily stop. The system
pressure should be approximately 12,400 kPa (1,800 psi) as the implement
relief valve opens.
11. After you monitor the relief valve pressure, return the lift switch to the
N position.
EUTRAL
Note: If the lift switch continues to be pressed after the relief valve has
opened, the system pressure can increase higher than the relief pressure.
12. Shut off the engine and record the test results.
13. If specification is not met, repair or replace the implement relief valve in the
gear pump; refer to
leaking lift cylinder, leaks in the deck lift manifold, a leaking check valve in
the steering control valve or a worn gear pump.
Note: The implement relief valve pressure can also be tested with a
hydraulic tester (pressure and flow) in series with the gear pump fitting and
disconnected hose; refer to
Pressure Gauges and Flow Meter) (page
on the hydraulic tester and follow
(Using Pressure Gauge) (page
14. Release pressure from the hydraulic system; refer to
from the Hydraulic System (page
15. Remove the pressure gauge from the deck lift manifold port. Install the plug
into the deck lift manifold port 3 and torque the plug to 34 N∙m (25 ft-lb).
55). Remove the plug from the deck lift manifold port 3.
IMPORTANT
position only until you get a system
AISE
Servicing the Gear Pump (page
Testing the Gear Pump Flow (Using Tester with
4–62). Use the pressure gauges
Testing the Implement Relief Pressure
4–59).
4–5).
Page 4–61 Hydraulic System: Testing the Hydraulic System
position
AISE
4–139). Also, consider a
Releasing Pressure