Lull 944E-42 Service Manual - Manual (Page 801)

10.43 Model 644E-42/944E-42 Rev. 6/04
Stabil-TRAK™ System
10.8.15 Hydraulic Troubleshooting - Locked Mode, Will Not Frame Sway Left
MU4260
Front
Legend
6. Solenoid 3
7. Check Valve 2B
8. Stabilizer Cylinder
9. Check Valve 2A
10. .030" Orifice Plug
11. Solenoid 4A
12. Solenoid 4B
13. Solenoid 12A
14. Solenoid 12B
15. Pressure Reducing Cartridge
11
9
7
8
6
12
13
14
15
10
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 left, the right 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