Lull 944E-42 Service Manual - Manual (Page 799)

10.41 Model 644E-42/944E-42 Rev. 6/04
Stabil-TRAK™ System
10.8.13 Hydraulic Troubleshooting - Locked Mode, Will Not Frame Sway Right
MU4260
Legend
1. Solenoid 4A
2. Solenoid 4B
3. Solenoid 12A
4. Solenoid 12B
5. Solenoid 3
6. .030" Orifice Plug
7. Check Valve 2A
8. Stabilizer Cylinder
9. Check Valve 2B
10. Pressure Reducing Cartridge
3
4
10
1
2
7
9
8
5
Front
6
Conditions:
• Ignition ON, engine
running
• Boom angle is
above 40°
• Travel select lever in
(N) NEUTRAL, or
park brake ON, or
service brake
ENGAGED
Inspect check valves 2A and 2B on the
stabilizer cylinder. Refer to Section
8.14.9, “Stabilizer Cylinder.”
Replace check valve(s).
With boom above 40°, when frame
swaying to the right, the left front tire
comes off the ground.
Check electrical wiring.
Check solenoid cartridge 3 in the
Stabil-TRAK™ manifold. Refer to Section
8.14.9, “Stabilizer Cylinder.”
Replace cartridge.
Not
OK
Not
OK
Not
OK
If OK
If OK
Refer to Stabil-TRAK™ Electrical
Circuit Operation and Troubleshooting
on pages 10.10 or 10.20