Vacuum Pump (3.0L Diesel)
| ITEM | DESCRIPTION |
|---|---|
| 1 | Vacuum connection (turbo control) |
| 2 | Vacuum connection for brake booster |
| 3 | Oil inlet port |
| 4 | Air vent |
| 5 | Drive dog |
| 6 | Oil return/scavenge pipe |
The vacuum pump is a combined vacuum and oil scavenge pump. The scavenge pump is g-rotor type pump that drains oil from the secondary turbocharger to accommodate vehicle tilt. The pump is located at the rear of the RH side cylinder head and is driven from the exhaust camshaft.
The vacuum pump is a radial vane pump. The vacuum pipe from the brake booster connects to an elbow on the rim of the vacuum pump.
The vacuum pump is lubricated and cooled by engine oil supplied to a port in the front face of the vacuum pump from a gallery in the cylinder head. The oil return is through a vent in the front face of the pump into a drain cavity in the cylinder head. Air extracted from the brake booster is vented into the drain cavity with the returning engine oil.