Lull 944E-42 Service Manual - Manual (Page 226)

Stabil-TRAK™ System
10-14 944E-42
10.5.2 Stabil-TRAK™ Hydraulic Circuit
The Stabil-TRAK™ hydraulic circuit can be tested using
these basic guidelines. For more hydraulic information,
refer to Section 8.4, “Hydraulic Circuits.”
10.5.3 Stabilizer Cylinder Oil Flow
In the FREE PIVOT and SLOW PIVOT MODES, oil flow
from the stabilizer cylinder will be in one of two directions;
ROD OIL OUT or BASE OIL OUT.
ROD OIL OUT flow will occur when the left side of the
rear axle is lower than the right side (left wheel in a
pothole, or the right wheel passing over an obstruction),
causing the cylinder to extend (1).
BASE OIL OUT flow will occur when the right side of the
rear axle is lower than the left (right wheel in a pothole, or
the left wheel passing over an obstruction), causing the
cylinder to compress (2).
Not
OK
Inspect check valves on the Stabil-
TRAK™ cylinder. Refer to Section
10.2.1, “Stabil-TRAK™ Solenoid
Valves.”
Replace check valve(s).
If OK
Not
OK
Check electrical wiring.
Not
OK
Check solenoid cartridge in the
Stabil-TRAK™ manifold. Refer to
Section 10.2.1, “Stabil-TRAK™
Replace cartridge.
If OK
Refer to Section 9.4, “Fuses and
Relays.”
MU4241
1
2