3.6 FRONT AND REAR PTO CONTROL UNIT 3. INTRODUCTION TO THE ELECTRONIC SYSTEM OF THE TRACTOR 3.6 FRONT AND REAR PTO CONTROL UNIT The PTO control unit is incorporated into the relays and fuses control unit. The electronic system controls the front PTO (if installed) and rear PTO in accordance with the commands given by the operator via the pushbuttons on the right hand con- sole. The PTOs can be activated or deactivated by the operator, and will in any event be inhibited automatically when the engine is switched off. The control unit receives the command given by the operator and responds by activating the rear PTO solenoid valve, which in turn pilots the operation of the PTO clutch.
P3 +15 7.5A F29 1 24 P3 FZW 2 1 2 EV PTO 2 1 3 3 2 1 4 3A F16 ISO7 X9 X10 PTODX D+ B+ PTO AUTO PTO SENS 5 +15 1 2 3 1 2 3 5 9 10 1 1 2 3 20 11 10 11 4 5 20 + - G 7.5A F10 7.5A F34 6 7 8 9 10 11 12 +15 +15 D0017270 1 - Front and rear pto control unit 2 - Front PTO solenoid valve 3 - Rear PTO solenoid valve 4 - Rear PTO speed sensor 5 - ISO7 socket (implement connection) 6 - Rear lift control unit 7 - Instrument panel 8 - PTO AUTO switch 9 - Alternator 10 - Front PTO pushbutton (in cab) 11 - Rear PTO pushbutton (in cab) 12 - Rear PTO Rx pushbutton (on fender) 20-20 PTO MODULE 2 13 8 10 11 2 3 2 5 9 5