Toro Z580 DFI Z Master Service Manual page 122

7. Verify the restrictor valve on the hydraulic flow tester
is in the fully "Opened" position (Fig. 341).
Fig 341
8. Start the machine. Run it for approximately 5
minutes to warm the oil in the hydrostatic system.
9. Release the parking brake and bring both levers to
the inside neutral position. Set the engine throttle to
full RPM.
Z580/Z589 DFI Z Master Service Manual
HYDRAULIC SYSTEM
10. Stroke the left hand hydrostatic lever fully forward.
Very slowly, rotate the "T" handle of the adjustable
flow tester restrictor valve until the pressure gauge
reaches 500 PSI (3447 kPa). The measured flow
should be 13 to 15 gpm (49 to 56.8 lpm) (Fig. 342).
PICT-3497a
11. With the unit at full engine throttle speed, slowly
rotate the "T" handle of the flow tester restrictor
valve clockwise until the pressure gauge reads
approximately 1000 to 1200 psi (6895 to 8274 kPa)
(Fig. 343).
Caution: DO NOT operate the machine for an ex-
tended period of time at the 1200 psi (8274 kPa)
rate.
Fig 342 PICT-3509a
Fig 343 PICT-3509a
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