Alfa Romeo Selespeed system
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SYSTEM COMPONENTS - ELECTRO-HYDRAULIC GROEP
  This is one of the system components where the actuators, position sensors, actuator solenoid valves have been incorporated, specifically connected by cables that link them to a centralised multiple connector.
This solution simplifies and cuts down assembly time on the gearbox and avoids connection errors. Furthermore the actuator solenoid valve cables all have identification labels.
   
   

Electro-hydraulic group

  
    The electro-hydraulic group consists of:
 1. A casting casing fastened on the gearbox
2. Single action actuator to activate the clutch lever
3. Proportional pressure solenoid valve EV1 to control the engagement of the odd gears 1-3-5
4. Proportional pressure solenoid valve EV2 to control the engagement of the even gears 2-4-R
5. On-off solenoid valve EV4 to control 5-R gear selection
6. On-off solenoid valve EV3 to control 1-2 gear selection
7. Proportional flow-rate solenoid valve EV0 to control the clutch actuator
8. Hydraulic gas accumulator
1. Hydraulic circuit pressure sensor
2. Sensor to detect clutch actuator position
3. Sensor to detect engagement actuator position
4. Sensor to detect selector actuator position
5. Bleed valve
6. Access to gear shaft actuators connecting screw
7. Union for oil delivery pipe
8. Union for oil return pipe
9. Connector for gearbox speed sensor
10. Selespeed wiring harness connector

The following are also installed in the electro-hydraulic group:
• a check valve
• an oil inlet filter
• screws fastening the engagement / selection actuator to the gearbox gear shaft.