AWD Valve Block Components
| ITEM | DESCRIPTION |
|---|---|
| 1 | Solenoid P4 |
| 2 | Solenoid P3 |
| 3 | Solenoid P2 |
| 4 | Solenoid P1 |
| 5 | Electrical contact element |
| 6 | Valve body |
| 7 | Oil filler plug |
| 8 | Pressure adaptor |
| 9 | RDU pump |
| 10 | Pump housing |
| 11 | Seal |
| 12 | Electric actuator |
| 13 | Electrical connector |
| 14 | Suction filter |
| 15 | Spool sleeve (4 off) |
| 16 | Spool (4 off) |
The AWD valve block is located at the front left side of the RDU, adjacent to the drive flange. The valve block is sealed to the RDU casing and secured with screws.
The body of the valve block and the casting voids in the casing form the hydraulic fluid reservoir. A sealed plug is located at the top of the valve block body for hydraulic fluid filling. A second sealed plug is located at the base of the valve body for hydraulic fluid draining.
Four machined bores house the spool sleeves and spool valves for the operation of Pressure Control valves (PCV) P1, P2, P3 and P4.
The PCV's control the following functions:
- P1 - Right RDU clutch
- P2 - Left RDU clutch
- P3 - PTU synchronizer piston - engage synchronizer
- P4 - PTU synchronizer - disengage synchronizer