Cub Cadet Domestic Series 7000 Service Manual page 25

8.26. Set the parking brake, place the gear selector in
neutral, open the flow valve on the gauge set all
the way, and confirm that no unsafe conditions
will be created by starting the tractor engine.
8.27. Start the engine, allow it to warm-up. Set the
throttle to maintain 1,200-1,500 RPM.
8.28. Have an assistant move the hydraulic lift lever
rearward to raise the lift arms.
8.29. As the lift arms travel upward, close the valve on
the test kit. Note the pressure. See Figure 8.29.
Figure 8.29
NOTE: It will take several successive steps to
close the valve far enough to reach maximum
pressure:
• Close the valve partially while the cylinder is
extending.
• Note the pressure reading and the color of the
highest exposed colored band on the valve.
• Open the valve completely.
• Lower the lift arms completely.
• Close the valve to the point that was reached on
the previous lift, as indicated by the exposed col-
ored bands.
• Extend the cylinder, and close the valve further
to build more pressure: repeat the process until
maximum pressure is achieved.
• Open the valve on the test kit immediately after
the pressure reading is noted.
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8.30. The pressure should approach but not exceed
8.31. If the pressure delivered to the control valve is
8.32. If the pressure delivered to the control valve is
8.33. If the pressure delivered to the cylinder is suffi-
8.34. If all pressures are O.K., no leakage exists, yet
21
Domestic Series 7000 Hydraulics
1,500 PSI (103 Bars).
low, the auxiliary pump has tested good, and the
hydraulic lines show no signs of physical dam-
age or leakage, then the problem lies in the
steering unit.
sufficient, but the pressure delivered to the cylin-
der is low, then the problem is likely to be in the
control valve.
cient, yet the cylinder does not perform ade-
quately, look for leakage from the cylinder.
the cylinder does not perform adequately, there
may be a mechanical bind, or the operator may
be overloading the equipment.