JLG Skytrak 6036 Service Manual page 134

Center Position
When the auxiliary control lever is placed in the
center or neutral position, the directional control
valve spool is positioned so that supply pressure is
applied through ports F to C, Fig. 9.8, to the return
filter and reservoir. If the filter becomes clogged,
hydraulic oil will bypass the filter when the pres-
sure reaches 10 to 15 psi (0,7 to 1,03 bar).
MAIN CONTROL
VALVE
MALE
TO AUXILIARY
ATTACHMENTS
FEMALE
TO FRAME TILT
CYLINDER
TO GRILLE TILT AND
SLAVE CYLINDERS
TO BOOM EXTEND/
RETRACT CYLINDER
TO BOOM HOIST
CYLINDERS
MA0491
9-21
BACKWARD
FORWARD
0-4000 psi
PRESSURE
30
GPM
GAUGE
Fig. 9.8 Optional Auxiliary Circuit
Forward Position
When the auxiliary control lever is placed in the
forward position, the directional control valve spool
is positioned so that pump applied pressure is
directed through ports E to A, Fig. 9.8, to the
female auxiliary quick connect coupler. Return
pressure is directed through ports B to D to the
return filter and reservoir. If the filter becomes
clogged, hydraulic oil will bypass the filter when
the pressure reaches 10 to 15 psi (0,7 to 1,03
bar).
DIRECTIONAL CONTROL VALVE
FORWARD
A B C
D E F
TANDEM RESERVOIR
PUMP
15
STRAINER
GPM
Model 6036 S/N 9B0499 and Before
Section 9. Hydraulic System
POSITIONS
BACKWARD
A B C A B C
D E F D E F
CENTER
RETURN
FILTER