721F - 821F - 921F

5A - STEERING

8 10

13

9
12 4

11

15 6

3 1
14

5
Bur 5-15950 Issued 3-09 Printed at U.S.A.

Racine / Monthyon Training centers 5A - 

5A - STEERING 721F- 821F - 921F
Operating Principle In addition, it is absolutely prohibited to use the JSS
during the operations of loading and unloading the MACHINE WITH JOSTICK HYDRAULIC CONTROL
The main components of the JOYSTICK STEERING unit on and off a truck for transport.
SYSTEM are: For signalling any JSS malfunction, the control panel Legende for the next page « System architecture joystick steering»
- hydraulic valves is provided with warning lights accompanied by
● proportional steering valve PVG32 (1) for activating the audible warnings of two different lengths, depending
steering cylinders with an incorporated pilot solenoid valve on the trouble that has occurred. 1 Proportional steering valve PVG32
(2); 2 Pilot pressure solenoid valve
● valve PVFC (3) that controls the LS signals from the 3 Valve PVFC
proportional valve PVG32 (1) and from the power steering 4 Orbitrol
valve (4) and transmits them to the pump (5) to allow cor- 5 Pump
rect operation;
- two-way PVRES control joystick that sends the signal to 6 Proportional steering valve PVG32 assembly
the pilot solenoid valve (2) located inside the proportional 7 Joystick steering controller
valve PVG32 (1); 8 Joystick steering activation switch (with armrest position switch)
- modulation controller (7) of the electric signal between the 9 Can module
joystick (10) and proportional valve (1); 10 Joystick PVRES
- F-N-R switch (12) on the armrest on the left-hand side;
- Kick-Down button (13) on the left-hand armrest; 11 LS Pressure switch
- F-N-R switch (14) on console on right-hand side; 12 Left hand armrest F-N-R switch
- Kick-Down button (15) on equipment control 13 Downshift button
Joystick on right-hand side. 14 Auxiliary F-N-R switch on the hydraulic joystick
15 Down shift button on the hydraulic joystick
The JSS is controlled by a switch (8) located on the control
panel, which checks, via software loaded on a component
(9) installed inside the armrest, that all the necessary safety
conditions for correct operation of the system are in place.

These conditions must be:

a. left armrest completely lowered;
b. gear lever in neutral;
c. equipment locking switch disenabled;
d. pilot pressure sensor closed;
e. JSS switch (8) in neutral;
f. unit stationary.
If not even one of these conditions occurs, the software will
not allow activation of the system. The software will allow
the operation of the joystick that activates the pilot sole-
noid valve (2) located inside the proportional valve PVG32
(1), via an electric signal, only after it has received all the
information and has confirmed that the general situation is
correct.

The actuator inside the electric module (6) of the propor-

tional valve of the steering gear (1) starts the directional
shuttle, which allows the oil to flow to the line of the stee-
ring cylinder. Through the pilot pressure switch of the valve
PVG32 (1), the software verifies that the oil pressure is
correct for the operation of the joystick (10).

When using the JSS, if a manoeuvre is made with the stee-

ring wheel, the pressure switch LS (11), located on the LS
line of the power steering valve (4) receives enough pres-
sure to switch over and therefore to turn off the JSS.
IT IS IMPORTANT to remember that, for reasons of safety,
the joystick (10) must be turned off for driving on roads.
Use of the joystick can be disenabled at any time by the
operator with the steering wheel, which has priority over the
joystick.

5A -  Racine / Monthyon Training centers

721F - 821F - 921F 5A - STEERING

8 10

13

9
12 4

11
15
6

3 1

2
14

5
Bur 5-15950 Issued 3-09 Printed at U.S.A.

Racine / Monthyon Training centers 5A - 

5A - STEERING 721F- 821F - 921F

51PW-P W-08 30
51B G W-08 87
147
JSS DATA COLLECTOR JSS ELECTRICAL CIRCUIT 0-SL Bk-08
51B E W-08
87A
85
51D-B Bk-08 86
Relay 147
149 30
JSS
1 2 3 4 5 6 7 8 9 10
87
87A

51PW-V W-08

CANS-LA G-0.8
CANS-HA Y-0.8
85
ARM 0-ST Bk-0.8

17P-D Bk-08
51S-D W-08
51NC Bk-08
51B J Bk-08

51R-D Bk-08

0-SE Bk-0.8
POSITION 51B K W-08 86
SWITCH Relay 156
FNR

51PW-Q W-08
156
1 1 CANS-HB Y-0.8
12 12 CANS-LB G-0.8
51E-B Or-08 3 3 51E-A Or-08 51E-A Or-08
17P-D Bk-08 4 4 17P-D Or-08
0-SG Bk-0.8 0-SH Bk-0.8 2 2 0-SJ Bk-0.8
51B J Bk-08 6 6 51B H W-08
0-SC Bk-0.8 7 7 0-SD Bk-0.8
150 51PW-S W-08 8 8 51PW-R W-08 51PW-W W-08
51S-C W-08 9 9 51S-B W-08
51H-C Y-08 10 10 51H-B Y-08
51NO-Y-08 11 11 51NO-A P-08 SW_PD AIC_1
5 5

51PW-V W-08

51S-E W-08
SW_PAD

51NC Bk-08
CAB - ARM +24V

51PW-T W-08
POS
9 21

51D-A Bk-08
17P_C Or-0.8
151
GND
0-BBC Bk-0.8

0-SU Bk-0.8
0-BBE Bk-0.8 9 9
10 10
17P-D Or-08 17P-G Or-08 2 2 17P-C Or-08 5 5
3 3 0-BBA Bk-0.8 4 4
51D-B Bk-08 4 4 51D-A Bk-08
51B-D W-08 5 5 51B-C W-08 6 6
0-SK Bk-0.8 8 8 0-BBD Bk-0.8 1 1
51PW-M W-08
51C-B Y-08
9
10
9 51PW-N W-08
51C-A Y-08
163 3 3
10
18S _D Or-0.8 11 11 2 2
18S _C Or-0.8
0-BBE Bk-0.8 7 7
JSS - CAB 8 8
49-W S-0.8
Illumination

51S-E W-08 18S _A Or-0.8 B A

-
51PW-V W-08 ECA F 2 5 AMP
51H-C Y-08
51NO-Y-08
0-SC Bk-0.8
51NC Bk-08 CANS-LB G-0.8 1
CANS-HB Y-0.8 12
CANS-LD G-0.8 6
51F-A G-1.0 A A 51F-B G-08 7
JS SOL VALVE 159 51J-C P-1.0 B B 51J-A P-08
CANS-HD Y-0.8

51K-C G-1.0 C C 51K-B G-08

US1 1 51L Y- 1.0 D D 51L-A Y-08
U+ 4 5S-J W 1.0 E E
ALM 2 51J-C P-1.0 51S-J W-1.0 F F 51S-F W-08
U- 3 0-AT Bk-1.0 0-AS Bk-1.0 G G 0-SF Bk-0.8
51PW-H -W 1.0 H H 51PW-T W-08

160 18S -E Or- 1.0 J J 18S _D Or-0.8 JSS - CONTROLLER

K K
CANS-HD Y-0.8 1
B B 51K-C G-1.0 FRM - JSS CANS-LD G-0.8 2
A A 18S -E Or- 1.0
17P-F Or-08 3
51H-B Y-08 4
161 51S-A W-08
51E-A Or -08
5
6
B B 51F-A G-1.0 51L-A Y-08
51K-B G-08
7
8
148
A A 51PW-J Or -1.0
51PW-Q W-08 9

PILOT DUMP 162 146 0-SM Bk-0.8

0-SN Bk-0.8
10
11
VALVE 51J-B P-08 12

51PW-K W -1.0
GND 820 Ohm 51C-B Y-08 13
1 1 51NO-A P-08 14
2 2 0-AV Bk-1.0 0-AV Bk-1.0 0-SR Bk-0.8 15
51F-B G-08 16

5A -  Racine / Monthyon Training centers

721F - 821F - 921F 5A - STEERING
IGN POWER
ILLUM POWER

A
ECA F 1
7.5 AMP
ADDITIONAL F-N-R HARNESS FOR JOYSTICK STEERING TRANS ECM
-

TECM TRANS

10 10 19A_E Or-0.8
8 8 49_H S-0.8
7 7 0_DAP S-0.8
1 57 RIDE_CNTRL_RELAY_SINK
6 GND_CAB 8 RIDE_CNTL_SW_PWR_VPS2
JOYSTICK 5
4
9 9 32J_C Y-0.8 5 TRANS_ENABLE_LIGHT
3 3 26E LU-0.8 31 TRANS_ENABLE_SIGNAL
2 2 19A_D Or-0.8
KICK
DOWN TRANSMISSION ENABLE SWITCH
R PINK
BROWN 5 5 32J_G Y-0.8 32J_G Y-0.8 5 32J_F Y-0.8
5
6 6 25Y_F LU-0.8 25Y_D LU-0.8 6 6 25Y_B LU-0.8 22 TRANS_KICKDOWN_SIG
N 1 1 1 1 19A_C Or-0.8
YELLOW 2 2 26F_D LU-0.8 A 26F_C LU-0.8 2 26F_B LU-0.8
2 20 FNR_FORWARD_SIGNAL
4 4 26R_D LU-0.8 B C 26R_C LU-0.8 4 4 26R_B LU-0.8
PURPLE KICK DOWN 30 FNR_REVERSE_SIGNAL
F 3 3 26N_D LU-0.8 26N_C LU-0.8 3 3 26N_B LU-0.8 44 FNR_NEUTRAL_SIGNAL
DIODE FWD DIODE
A C
F-N-R SWITCH
RIGHT CONSOLE B
A C
B
NEUTRAL DIODE
2 2 2 25Y_C LU-0.8 Supply from JSS
1 1 1 19A_U Or-0.8 A C RELAY
51B_K W-0.8
B
KICK DOWN SWITCH
REV DIODE
26F_F LU-0.8
25Y_F LU-0.8

26N_E LU-0.8
32J_ H-0.8

LEFT ARM REST

26R_E LU-0.8

19B_B Or-0.8
7 7 32J_A Y-0.8

ECB
8 8 19A_G Or-0.8

86
85 87A 87
5 5 19A_V Or-0.8 5 5 0-ST Bk - 0.8
4 4 6 6
9 1 1

30
6 6 26F_A LU-0.8 2 2
1 1 26R_A LU-0.8 4 4 F-N-R RELAY
10 3 3 FOR JOYSTICK STEERING
3 3 26N_A LU-0.8
2 2 26J LU-0.8

F-N-R SWITCH
LEFT ARM REST

Racine / Monthyon Training centers 5A - 

5A - STEERING 721F- 821F - 921F

20

21
27
19

22 22

29
8
22 22

28
21

26
13

24

25
16

23
Bur 5-15950 Issued 3-09 Printed at U.S.A.
2
WIRING DIAGRAM OF THE JOYSTICK STEERING SYSTEM

2. Steering control device (JSS Controller) 23. 8 bar pressure switch

8. Joystick Steering System switch 24. 60 bar pressure switch
16. Cable terminal with eyelet 25. Steering valve PVFC
19. Control joystick 26. Steering valve PVG32
20. CAN Module 27. Armrest position switch
21. Relay 28. F-N-R SWITCH
22 Diode 29. Kick-Down switch

5A -  Racine / Monthyon Training centers