Stabil-trak™ system – Lull 944E-42 Service Manual User Manual

Page 228

Advertising
background image

Stabil-TRAK™ System

10-16

944E-42

10.5.5

Hydraulic Troubleshooting - Free Pivot Mode, Rod Oil Out

MU4261

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

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

8.8, “Hydraulic Cylinders.”

Inspect check valves 2A and 2B on the

stabilizer cylinder. Refer to Section 8.8,

“Hydraulic Cylinders.”

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 8.8, “Hydraulic

Cylinders.”

Check electrical wiring.

If OK

If OK

If OK

If OK

Not

OK

Not

OK

Not

OK

Not

OK

Not

OK

Advertising