Toro Z Master 500 Series, Service Manual, Page: 69 / 168

4-20 Z Master 500 Gas Series Service Manual
4
HYDRAULIC SYSTEM
Pushing the Machine by Hand
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 (69 to 83 bar).
CAUTION: DO NOT operate the machine for
extended period of time at high pressure.
12. Record the difference or “flow droop” of the pump.
For the Hydro-Gear BDP 10A and BDP 12 pump,
maximum allowable “flow droop” is 1.5 gpm. Any
droop greater than 1.5 gpm (6.8 liters/min) is
considered unacceptable and the pump should be
replaced barring any other potential causes.
13. Return the motion control lever to neutral position
and return the levers to the neutral locked position.
Engage the parking brake. Slow the engine speed to
idle and turn the ignition switch to the OFF position.
14. Disconnect the hydraulic flow tester from the
hydraulic lines.
15. Re-connect the hydraulic lines to the wheel motor.
Tighten fittings.
16. Check the hydraulic reservoir and fill as necessary
to the “Hot” level mark, see, Checking the Hydraulic
Fluid page 2-10.
17. Re-install the left rear tire and lower the unit to the
ground. Remove the temporary jumper cable for the
seat and reconnect the seat switch. Reconnect the
connector for the electric PTO clutch.
Important: Do not rotate the by-pass valves more
than 1 turn or the valves can come out of
the body and cause fluid to run out.
3. Disengage the parking brake before pushing.
Fig 156 DSC-3130
Important: Always push the machine by hand. Never
tow the machine because hydraulic
damage may occur.
1. Disengage the power take off (PTO) and turn the
ignition key to OFF. Move the levers to the neutral
position and apply the parking brake.
2. Rotate the by-pass valves counterclockwise 1 turn to
push. This allows hydraulic fluid to by-pass the pump
enabling the wheels to turn (Fig. 156).