Toro Groundsmaster 4300-D Service Manual page 147

Test Procedure
Groundsmaster ® 4300-D
16226SL Rev C
1. Park the machine on a level surface with the PTO switch off, lower the cutting
decks, shut off the engine, mow speed limiter is in the M
set the parking brake.
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
2. Read all Warning, Cautions, and precautions listed at the beginning of this
section.
g189901
1. Gear pump (P4)
3. Lift and support the operator seat and remove the floor plate to get access to
the hydraulic pump.
4. Clean the hydraulic hose end and the pump fitting at the outlet of pump (P4)
(Figure 78).
Ensure that the fluid flow indicator arrow on the flow gauge is
showing that the fluid will flow from the pump (P4), through the
tester, and to the lift control manifold.
5. Connect the tester inlet to the pump fitting, and connect the tester outlet to
the disconnected hydraulic hose. Ensure that the flow control valve on tester
is fully open.
6. Start the engine and run it at low-idle speed. Check for hydraulic-fluid leaks
from the test connections and correct before continuing the test.
7. With the engine running, press the engine speed switch to full speed (3,005
to 3,055 rpm) position. Use the InfoCenter to check that the engine speed is
correct.
CAUTION
Releasing Pressure from the
4–6).
Figure 78
2. Hydraulic hose
IMPORTANT
Page 4–85 Hydraulic System: Testing the Hydraulic System
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