SkyTrak 6042 Service Manual - Manual (Page 522)

Stabil-TRAK™ System
10.16 Model 6042 Legacy Origin 7/02
10.5.5 Hydraulic Circuit Operation - Free Pivot Mode, Base Oil Out
Figure 10-20 FREE PIVOT MODE Hydraulic Circuit (Base Oil Out Flow)
Conditions:
• Boom angle is below 40°
• Rear axle pivots freely
• Travel select lever in (F) FORWARD or (R) REVERSE
position
• Park brake OFF
• Service brake DISENGAGED
Operation:
When the conditions are met, solenoids 12A and 12B are
energized. As the left side of the rear axle moves down,
the rod is forced up, forcing hydraulic oil out from the base
end of the stabilizer cylinder (Fig. 10-20, 1 and
Fig. 10-21, 1). The oil then flows through the solenoid-
operated valves 12A (2) and back through solenoid-
operated valve 12B (3), to the rod side of the stabilizer
cylinder.
Because the volume of oil needed on the rod side is less
than that needed on the base side, excess oil is returned
to the tank through a 100 psi (7 bar) reducing cartridge
(Fig. 10-20, 4 and Fig. 10-21, 4) in the Stabil-TRAK™
manifold.
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
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
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
MA10,0740
2
3
1
4