SkyTrak 8042 Service Manual - Manual (Page 454)

8.39 Model 8042, 10042, 10054 Legacy Rev. 10/03
Hydraulic System
Not
OK
Not
OK
If there are no auxiliary
hydraulics functions, check
cable connections at main
control valve.
Check pump flow.
If OK
Not
OK
Check system relief on main
control valve.
Adjust/repair/replace
relief valve on the main
control valve.
If OK
Repair/replace pump.
Repair/replace cable
connections. Ensure auxiliary
section of main control valve is
functioning.
Not
OK
Check the flow at the end of
the circuit at the male coupler.
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