jcb Robot 160 - Servo Transmission Operation; Neutral

Section E - Hydraulics
Operation Description
Servo Transmission Operation
E - 16 E - 16
9803-9450-2
Servo Transmission Operation
Neutral
K Fig 13. ( T E-16)
With the engine running but no drive selected, oil from
charge pump P4 is fed through the filter F1 to transmission
pumps P1 and P2.
Oil is also fed from pump P4 to the loader servo control
joystick 13 and the transmission servo joystick 12.
Because the transmission joystick is not operated, the oil
is blocked by the spools 12a, 12b, 12c and 12d and
therefore no servo pressure is applied to operate the
swash plates of pumps P1 and P2.
As the pump swash plates are spring loaded to the neutral
position there is no delivery from either pump and the
machine remains stationary.
The machine is prevented from moving by oil locked up in
the pump/motor circuit.
Fig 13.
P
FWD
LEFT
T
D
REV
BRAKE
VALVE
4
REV
BUCKET RAM
BORE DIA 90
ROD DIA 40
T
LIFT RAM
BORE DIA 75
ROD DIA 50
SAUER SUNSTRAND 42-41
TANDEM HYD SERVO DISPLACEMENT CONTROL
TRANSMISSION PUMP
0.041 L/REV
FWD
OIL COOLER
385 BAR
385 BAR
385 BAR
385 BAR
SUCTION
STRAINER
125 MICRON
RIGHT
T
C
SUCTION 2" TUBE
HPCO
AUX DRIPLESS FLAT
FACED COUPLINGS
ENGINE
71 L/MIN
P
SERVO CONTROL VALVE
1
TP
SERVO CONTROL VALVE
DF
REV
C
P
A
FWD
B
FLOAT VALVE
TP
T
2
C
E
B
3
D
EMERGENCY LOWER
VALVE
A
A
B
M5 M4
M4
M5
F
SP1
24 BAR
M4
M5
REAR PUMP
SERVO CUTOFF
VALVE
FRONT PUMP
SP2
JOYSTICK
CONNECTIONS
SP3
PLAN VIEW PUMP
M5
E
LHS N/S
RHS O/S
M4
SP4
JOYSTICK PORT 1 TO VALVE PORT B1
JOYSTICK PORT 2 TO VALVE PORT B2
JOYSTICK PORT 3 TO VALVE PORT A1
JOYSTICK PORT 4 TO VALVE PORT A2
CROWD (JOYSTICK IN)
TIP (JOYSTICK OUT)
LIFT (JOYSTICK BACK)
LOWER
JOYSTICK FWD)
A
C
FILTER
D
PARALLEL
LIFT
VALVE.
2 BAR CHECK
VALVE
12 CC/REV
X 1:0.85 RATIO
2800 RPM = 34 L/MIN
21.3 CC/REV
@ 2800 RPM
= 60 L/MIN
25.4 CC/REV
@ 2800 RPM
= 71 L/MIN
TP
T
P
2
P
1
D
P1
P2
TP
DUMP
VALVE
DRIVE MOTOR
DRIVE MOTORTRANSMISSION PUMP
LOADER
NOTE:
NOT REQUIRED
WITH FLOAT VALVE
LOADER VALVE
P
T
CHARGE
FILTER
A
B
C
P2
T3
B1 P2
B1
T3
AUX OPP VALVE
131 L/MIN
HF VALVE
ATTACHMENT
0.5 BAR
CHECK VALVE
ACCUMULATOR
5 BAR 24CC
B2
B3
B1
A3
A2
A1
P
1
2
3
4
5
6
7
8
9
9a
9b
9c 9d
9f
10
11
12
12a
12b
12c
12e
12d
14
X2
F1
15
16
17
19
19a
19b
20
T
C
F2
P1
P2
P3
P5
P4
M1
M1a
M2
M2a
S
T
X1
Z
13
13b
13c
13a
13d