SkyTrak 8042 Service Manual User Manual
Page 444
8.29
Model 8042, 10042, 10054 Legacy
Rev. 10/03
Hydraulic System
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
With the boom below 40°, if
the frame sway cylinder will
not sway left, drifts or reacts
slowly, check cable
connections at the main
control valve.
Replace check valves on
frame sway cylinder.
If OK
If OK
Not
OK
Repair/replace cable
connections. Ensure frame
sway section of main control
valve is functioning.
Check frame sway
cylinder packing.
Repair/replace frame
sway cylinder.
Refer to Section 10.12, “Stabil-TRAK™ Hydraulic Circuit
Operation and Troubleshooting,”
for further information on
troubleshooting the frame sway and stabilizer circuits.
NOTE:
Refer to Section 2.5.4, “Performance
Specifications,” for approximate cylinder cycle
times. The operation of the system function
should approximate the times listed.
Check the pilot-operated check
valves on frame sway cylinder.