Hydraulic Troubleshooting - Free Pivot Mode, Rod Oil Out - JLG sky trak mmv Service Manual

11.4.4

Hydraulic Troubleshooting - Free Pivot Mode, Rod Oil Out

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
Model MMV Rev. 12/04
When frame swaying right, left front
tire comes off the ground
Check electrical wiring. Refer to Section
11.4.8, Electrical Troubleshooting - Free
Pivot Mode, Will Not Frame Sway Right .
If OK
Check solenoid coils 12A (1) and
12B (2) on the Stabil-TRAK™ manifold
for correct resistance (7-9 ohms).
If OK
Remove solenoid cartridges 12A (1) and
12B (2) from Stabil-TRAK™
manifold and inspect for
debris or damage. Refer to
Section 9.14.9, b. Stabilizer Cylinder
Disassembly .
If OK
Inspect check valves on frame sway
cylinder. Refer to Section 9.14.8, b.
Frame Sway Cylinder Disassembly .
If OK
Inspect check valves 2A (5) and 2B (6)
on the stabilizer cylinder. Refer to
Section 9.14.9, b. Stabilizer Cylinder
Disassembly .
Stabil-TRAK™ System
Refer to Section 10.7.17, Frame Sway
Not
Circuit and Troubleshooting .
OK
Not
Replace solenoid(s).
OK
Clean passages or replace
Not
cartridge(s).
OK
Not
Replace check valve(s).
OK
Not
Replace check valve(s).
OK
11.9