Lull 944E-42 Service Manual - Manual (Page 791)

10.33 Model 644E-42/944E-42 Rev. 6/04
Stabil-TRAK™ System
10.8.4 Hydraulic Troubleshooting - Free Pivot Mode, Rod Oil Out
MU4260
Front
3
2
4
5
6
8
9
1
7
Legend
1. Stabilizer Cylinder
2. Solenoid 12B
3. Solenoid 12A
4. Pressure Reducing Cartridge
5. Solenoid 4A
6. Solenoid 4B
7. Solenoid 3
8. Check Valve 2A
9. Check Valve 2B
Refer to Stabil-TRAK™ Electrical
Circuit Operation and Troubleshooting
on pages 10.10 or 10.20
When frame swaying right, left front
tire comes off the ground
Conditions:
• Ignition ON, engine
running
• Boom angle is
below 40°
• Travel select lever in
(F) FORWARD or
(R) REVERSE
• Park brake OFF
• Service brake
DISENGAGED
Check solenoid coils 12A and 12B on the
Stabil-TRAK™ manifold for correct
resistance (7-9 ohms).
Remove solenoid cartridges 12A and 12B
from Stabil-TRAK™ manifold and inspect
for debris or damage. Refer to Section
8.14.9, “Stabilizer Cylinder.”
Inspect check valves 2A and 2B on the
stabilizer cylinder. Refer to Section
8.14.9, “Stabilizer Cylinder.”
Replace solenoid(s).
Clean passages or replace cartridge(s).
Replace check valve(s).
Replace check valve(s).
Inspect check valves on frame sway
cylinder. Refer to Section 8.14.8, “Frame
Sway Cylinder.”
Check electrical wiring.
If OK
If OK
If OK
If OK
Not
OK
Not
OK
Not
OK
Not
OK
Not
OK