N39453 Chapter 4
Page 85
How to renew the lubricating oil
Warning! Discard the used lubricating oil in a safe place and in accordance with local regulations.
Warning! Do not adjust the oil level while running.
Note: Renew the lter canister when the lubricating oil is renewed.
1. Drain the lubricating oil into a suitable container with a capacity of approximately 10 litres (17.5 pints), the
lubricating oil should be drained while it is still hot.
2. Remove the 3/8” NPTF plug (AJ1) from the tap and attach a length of hose (with a sump pump if available),
to the container.
3. Open the tap (AJ2) and allow the oil to drain out.
4. Remove the container of used lubricating oil, close the tap and replace the plug.
5. Clean the area around the ller cap on top of the rocker cover and remove the cap.
Caution: All these engines are tted with a ‘closed’ crankcase breather system. Any necessary oil additions to
the sump must be carried out with the engine stationary. Under no circumstances must oil additions be carried
out with an engine running as oil could enter the ‘closed’ crankcase breather system causing the engine speed
to increase rapidly without control. It is important to ensure the correct level of lubricating oil is not exceeded
in the sump. If there is too much oil in the sump the excess must be drained to the correct level. An excess of
engine oil in the sump can enter the ‘closed’ crankcase breather system, which could cause the engine speed
to increase rapidly without control.
6. Add slowly, new and clean lubricating oil (Data section) of an approved specication to the engine. Allow
the oil enough time to pass to the sump, remove the dipstick (AK2) and ensure that the lubricating oil is to the
full mark (AK1). The oil level must not be above the full mark. If it is, the engine could be damaged.
7. Fit the ller cap and ensure that the dipstick is tted correctly in the dipstick tube.
8. Start the engine and check for lubricating oil leakage. Stop the engine. After 15 minutes check the oil level
on the dipstick and, if necessary, put more lubricating oil into the sump.