Stabil-trak™ system – SkyTrak 6042 Service Manual User Manual
Page 526
Stabil-TRAK™ System
10.20
Model 6042 Legacy
Origin 7/02
10.5.9
Hydraulic Circuit Operation - Final Positioning Mode, Base Oil Out
Figure 10- 24 FINAL POSITIONING MODE Hydraulic Circuit (Base Oil Out)
Conditions:
• Boom angle is above 40°
• Park brake OFF
• Service brake DISENGAGED
• Travel select lever in (F) FORWARD or (R) REVERSE
position
Operation:
As the boom is raised above 40°, the boom proximity
switch is deactivated causing solenoids 12A and 12B to
de-energize and solenoids 4A and 4B to energize. This
allows oil to flow from the base end of the stabilizer
cylinder (Fig. 10-24, 1 and Fig. 10-25, 1), through
solenoid-operated valve 4A (2), through a .060" orifice (3),
through another .060" orifice (4), then through solenoid-
operated valve 4B (5), to the rod end of the stabilizer
cylinder.
The .060" orifices (Fig. 10-24, 3 and 4) in solenoid-
operated valves 4A and 4B will slow the movement of the
rear axle in reaction to terrain changes. The frame sway
will react normally in this mode.
Because of the greater volume of oil in the base end,
extra oil is returned to the tank through the 100 psi (7 bar)
reducing cartridge (Fig. 10-24, 6 and Fig. 10 -25, 6) in the
Stabil-TRAK™ manifold. The restrictions produce the slow
movement, or FINAL POSITIONING mode.
IN
T
T
ATTACH
TILT
FRAME
EXT/RET
LFT/LWR
AU
X
LS
SECONDARY
FUNCTION
MANIFOLD
PP
P
PS
PSG
PPG
T
PBG
PB
UNLOADER
VALVE
T
V
LSG
P
LS
VG
SFV
HYDRAULIC
RESERVOIR
CHECK
VALVE
FITTING
CHECK
VALVE
FITTING
CHECK
VALVE
FITTING
MAIN
CONTROL
VALVE
PUMP
FRAME
SWAY
CYLINDER
FTR
FTB
HYDRAULIC
OIL COOLER
Pressure
Suction
Return
Load Sense
SOLENOID COIL
STATE
ENERGIZED
DE-ENERGIZED
E
DE
Ш .029
Ш .047
Ш .040
STABILIZER
CYLINDER
.060 DIA.
FTR
P
T
V
G3
G2
G1
4A
4B
12B
3
2B
2A
12A
.060 DIA.
.030 DIA.
100 PSI
STABIL-TRAK
TM
MANIFOLD
DE
E
DE
E
DE
MA10,0760