Domestic Series 5000 Hydraulics
21
8.22. Disconnect the flexible hydraulic line that leads
from the control valve to the lift cylinder using an
11/16” and a 3/4” wrench. See Figure 8.22.
8.23. Connect the test kit to the 3/8” flare fittings. The
pressure gauge should be near the valve, and
the flow meter should be near the cylinder.
See Figure 8.23.
8.24. 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.
8.25. Start the engine, allow it to warm-up. Set the
throttle to maintain 3,000 RPM.
8.26. Move the hydraulic lift lever rearward to raise the
lift arms.
Figure 8.22
Disconnect here
Figure 8.23
To valve
To cylinder
8.27. As the lift arms travel upward, note the reading
on the flow meter. It should be in the vicinity of 5
GPM (19 LPM). See Figure 8.27.
8.28. Continue moving the arms up until they reach
the top end of their travel. Note the pressure
reading. See Figure 8.28.
•
The pressure should approach but not exceed
1,500 PSI (103 Bars).
•
The flow will fall to zero as the pressure builds.
8.29. If the pressure delivered to the control valve is
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.
Figure 8.27
No significant
pressure
UP
4 GPM
Figure 8.28
No flow
1,500 PSI
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