SkyTrak 6036 Service Manual - Manual (Page 260)

Stabil-TRAK™ System and Boom Interlock System
10-32 6036, 6042, 8042, 10042, 10054
10.11.6 Hydraulic Circuit Operation - SLOW PIVOT Mode, Rod 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 rod end of the Stabil-TRAK™
cylinder (1), through solenoid-operated valve 4B (2),
through a 0.060 inch orifice (3), through another 0.060 inch
orifice (4), then through solenoid-operated valve 4A (5),
then to the base end of the Stabil-TRAK™
cylinder.
The 0.060 inch orifices (3 and 4) in solenoid-operated
valves 4A (5) and 4B (2) will slow the movement of the
rear axle in reaction to terrain changes. The frame level
will react normally in this mode.
Because of greater volume of oil required, extra oil is
required from system through the 100 psi (7 bar) reducing
cartridge (6) in the Stabil-TRAK™
manifold. Restrictions
produce the slow movement, or SLOW PIVOT mode.
STABIL-TRAK
CYLINDER TM
HYDRAULIC
OIL COOLER
BYPASS
CHECK
VALVE
BYPASS
CHECK
VALVE
FTR
P
T
V
Pressure
Suction
Return
Load Sense
G3 G2
G1
4A 4B 12B
3
2B
2A
12A
FRAME
LEVEL
CYLINDER
.060 DIA.
.030 DIA.
.060 DIA.
100 PSI
SOLENOID COIL
STATE
ENERGIZED
DE-ENERGIZED DE
E
DE
E E DE DE
P
T
C
PS PB
PLT
PSG
PBG
G
IN T
T
AT
TA
C
H
TIL
T
P
FRAME SW
A
Y
EXT/RET LFT/L
WR
AU
X
STABIL-TRAK
MANIFOLD
TM
HYDRAULIC
RESERVOIR
SECONDARY
FUNCTION
MANIFOLD
PUMP
MAIN CONTROL
VALVE
MAQ3072
1
2
3
4
5
6