Service Manual User Manual

Section 10
10-72
Model 3606 • Origin 10/99
8. Depress the service brake pedal. Disengage the
parking brake switch and move the travel select lever
to the REVERSE (R) position. Release the service
brake pedal to deactivate the Stabil-TRAK system
and the Stabil-TRAK light should go OFF. The left
front tire should return to the ground while the vehicle
travels in reverse. Depress the service brake pedal to
stop the vehicle.
9. With the service brake pedal depressed, boom angle
at exactly 45°
, move the range select lever to third (3)
and the travel select lever to FORWARD (F). Release
the service brake pedal to deactivate the Stabil-
TRAK system and the Stabil-TRAK light should go
OFF. Slowly drive the vehicle forward against the
block to stop the vehicle from moving forward. With
the left front tire against the block, frame sway the
vehicle no more than 5° in both directions (left and
right) while checking that the front tires remain on the
ground. It is normal for the left front tire to raise
slightly when swaying to the left and for the right front
tire to raise slightly when swaying to the right, but the
tires should immediately lower when the frame sway
function is stopped. The tires should not come
completely off the ground during this step. Frame
sway the vehicle back to 0°. Depress the service
brake pedal, shift the travel select lever to NEUTRAL
(N) and lower the boom.
If steps 1 through 9 prove positive, the Stabil-TRAK sys-
tem is functioning properly and the vehicle can be
returned to service. if any of these steps indicate that the
Stabil-TRAK system is not functioning properly, repair the
system immediately.
b. Stabil-TRAK Solenoid Valves
There are five Stabil-TRAK solenoid valves (Fig. 10– 85)
attached to the Stabil-TRAK cylinder manifold, anchored
at the left side of the rear axle. Individual solenoid valves
may be replaced as required.
Figure 10– 85. Stabil-TRAK manifold.
Stabil-TRAK Solenoid Valve Replacement
If a solenoid valve (Fig. 10– 85) is suspected of malfunc-
tioning, disconnect the coil wiring lead and test the coil.
Also inspect the valve cartridge, O-rings, and the other
hydraulic and electrical components in the circuit to accu-
rately determine the cause of the problem.
FTR
MS1730
Solenoid Coil 5
Valve
(under retainer)
Stabil-TRAK
Manifold
Solenoid
Coil 1
Solenoid
Coil 2
Solenoid Coil 3
Solenoid Coil 4