SkyTrak 6042 Service Manual - Manual (Page 280)

Hydraulic System
8.48 Model 6042 Legacy Origin 7/02
8.8.18 Crab Steering Circuit (Right) and Troubleshooting
(Refer to Section 8.8.26, “Steering Circuit Descriptions” for a more detailed explanation of this circuit.)
Figure 8-21 Crab Steering Hydraulic Circuit (Right)
MA10,0400
NOTE:
When checking pressures
in circuits, refer to Section
8.7, “Hydraulic System
Testing” for correct
pressure readings.
Before troubleshooting
any hydraulic circuit,
ALWAYS begin by
checking the
following:
1. Hydraulic oil level in
the reservoir
2. All hoses, tubes,
fittings for leaks,
kinks, interference,
etc.
3. Air in the lines
Not
OK
Not
OK
If the steering is slow or difficult,
check the pressure at the “PSG” port
of the secondary function manifold.
If OK
Check packing in steering cylinders.
If OK
Repair/replace cylinder(s).
Not
OK
Not
OK
Check the power steering unit. Replace power steering unit.
Check the shuttle valve. Replace shuttle valve.
If OK
If OK
Adjust/repair/replace pressure-reducing
valve on secondary function manifold.
Not
OK
Verify that the check valve fitting at the
power steering unit is operating properly.
Replace check valve fitting.