RDU Clutch
RDU Clutch Exploded View
| ITEM | DESCRIPTION |
|---|---|
| NOTE: | Left clutch assembly shown, right clutch assembly similar |
| 1 | Taper roller bearing |
| 2 | Roller bearing |
| 3 | Outer disc carrier |
| 4 | Inner disc carrier |
| 5 | Inlay |
| 6 | Outer friction disc |
| 7 | Inner plain disc |
| 8 | Pressure disc |
| 9 | Roller bearing |
| 10 | Circlip |
| 11 | Ball bearing |
| 12 | Circlip |
| 13 | Spring washer |
| 14 | Ring |
| 15 | Shim |
| 16 | Piston |
| 17 | Left cover |
The clutch assemblies comprise an outer disc carrier which locates on splines on the crown wheel drive shaft, an inner disc carrier which is located in a ball bearing in the left cover, six inner plain metal discs, six outer friction discs and a piston which is located in the left cover.
The outer disc carrier has a splined bore which locates on the crown wheel drive shaft. Machined teeth on the inside face of the carrier provide positive location for the outer friction discs.
The inner disc carrier is located inside the outer disc carrier and supported on a ball bearing in the left or right cover. External machined teeth provide positive location for the inner plain discs. An internal bore in the inner disc carrier is splined to accept the halfshaft.
A piston with two seals is fitted to a machined bore in the left or right cover. The piston receives hydraulic pressure from the RDU pump via the AWD valve block and applies pressure to lock the inner and outer clutch discs together. A needle roller bearing is located between the piston and the pressure disc which allows the piston to remain stationary as the clutch discs and carriers rotate.
The outer disc carrier is permanently driven, when the PTU synchronizer is engaged, via the splines on the crown wheel shaft. When pressure is applied to the piston, it presses the inner and outer discs to together, locking the inner and outer carriers together and allowing drive from the crown wheel shaft to be passed to the halfshaft via the inner disc carrier.