Upper And Lower Shafts
| ITEM | DESCRIPTION |
|---|---|
| 1 | Seal assembly |
| 2 | Bolt |
| 3 | Inner tube |
| 4 | Universal joint |
| 5 | Isolator disc |
| 6 | Outer tube |
| 7 | Stub shaft |
| 8 | Bolt |
| 9 | Pinion extension |
| 10 | Double universal joint |
| 11 | Bolt |
| 12 | Boot |
| 13 | Bearing sleeve |
The upper shaft consists of inner and outer tubes that can move telescopically to:
- Permit system assembly.
- Allow steering wheel adjustment.
- Isolate the steering wheel from any movement of the steering gear during an impact.
A universal joint connects the inner tube to the upper column. An isolator disc, between the universal joint and the inner tube, reduces NVH (noise, vibration and harshness) in the steering column.
A seal assembly, installed on a bearing sleeve on the outer tube, seals the upper shaft where it passes through the engine and secondary bulkheads. A bearing allows the upper shaft to rotate within the seal assembly.
The lower shaft consists of a double universal joint with a stub shaft and pinion extension to connect it to the upper shaft and the steering gear respectively. The universal joint is fitted with a corrugated boot.