SkyTrak 6042 Service Manual - Manual (Page 520)

Stabil-TRAK™ System
10.14 Model 6042 Legacy Origin 7/02
10.5.3 Hydraulic Circuit Operation - Free Pivot Mode, Rod Oil Out
Figure 10- 18 FREE PIVOT MODE Hydraulic Circuit (Rod 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 extends, forcing hydraulic oil out from the rod end
of the stabilizer cylinder (Fig. 10-18, 1 and Fig. 10-19, 1).
The oil then flows through the solenoid-operated valve
12B (2) and back through solenoid-operated valve
12A (3), to the base side of the stabilizer cylinder.
Because the volume of oil needed on the base side is
greater than that needed on the rod side, the extra oil
needed is supplied from the main hydraulic system
through a 100 psi (7 bar) reducing cartridge
(Fig. 10-18, 4 and Fig. 10-19, 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
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
MA10,0700
2
3
1
4