OIL FILTER AND COOLER ASSEMBLY
The majority of oil is routed to the oil filter, which is a separate single filter element located in the housing. The over-flow valve for the blocked filter is in the cover. The valve opens at approximately 2 bar.
There is a valve at the bottom of the housing. The task of the valve is to drain the housing of oil when the oil filter is removed. When the oil filter is installed, the valve is closed. A spring loaded ring at the bottom of the filter housing is affected by the actual filter. The ring is, in turn, mechanically connected to the valve.
When the filter is removed, the spring lifts the ring, which, in turn, opens the valve and allows the oil to drain into the oil pan.
Scheme 136
| Item Number | Description |
|---|---|
| 1 | Oil pan |
| 2 | Oil pump |
| 3 | Oil pressure pipe |
| 4 | Oil level/temperature sensor |
| 5 | Oil cooler |
| 6 | Oil level gage |
| 7 | Oil filter cover |
| 8 | Vibration damper pipe with jets |
| 9 | Piston cooling jet (6 off) |
| 10 | Supply line with strainer |
| 11 | Bleed valve |
The oil passes a non-return valve before it reaches the oil cooler/filter housing. The non-return valve ensures that the oil filter housing is not drained of oil when the engine is switched off. The valve opens at approximately 0.2 bar.
The oil first passes the oil cooler, a plate oil cooler. The chamber for oil and coolant is split alternately between the plates. There are 20 plates used in total. The first 16 plates are used for oil, which is routed through the engine's normal lubrication circuit, i.e. the oil is routed to the oil filter.
The 4 last plates are used to provide a proportion of the oil with extra cooling before it is routed onwards to cool the vibration damper. The circuit is calibrated to achieve correct flow.
There is a by-pass valve parallel to the oil cooler. The valve ensures an oil flow to the oil filter even if the oil cooler is blocked. The valve opens at approximately 2 bar.
REAR END ACCESSORY DRIVE (READ) IDLER SHAFT ASSEMBLY
Special Tool(s)
303-1486 Mandrel 303-1488 Rear End Accessory Drive (READ) Idler Shaft Assembly Extractor
