Norton Commando Workshop Manual

## Routine Maintenance

# K

### SECTION K4

### ENGINE OIL TANK LEVEL

The oil tank content is indicated on a dip stick incorporated in the tank filler cap which is removed by . pressing and turning the cap anti-clockwise.
Access to the tank filler cap is made by: releasing the two hand discs retaining the rider's seat, raising the seat slightly rearwards (except the Fastback models) and lifting it clear.
Before filling fresh oil, run the engine for three to four minutes to return excess oil from the crankcase, observing the oil circulating through the oil tank filler orifice.
Allow the oil to settle in the tank, then fill sufficient oil of a recommended grade until the correct oil level is shown on the dipstick. The oil level shouid not exceed the "H" mark or fall below the "L" on the dipstick. It is most important not to exceed the "H" to prevent oil overflowing into the air filter, causing high oil consumption.

### SECTION K5

### ENGINE OIL CHANGING

Remove the rider's seat, where applicable take out the two right side cover top fixing bolts, and lift the cover clear at the bottom rubber mounting. Drain the oil from the tank by removing the oil tank drain plug, where fitted,

(see Fig. K2, item A) or on earlier models by taking out the oil filter unlon securing the oil pipe (see Fig. K3). This should be carried out when the oil is warm so that it flows more freely from the tank. The crankcase drain plug (see Fig. K4, item A) should be removed and the small amount of oil in the sump allowed to drain off.
Replace the oil tank and crankcase drain plug or on earlier models the oil filter and oil pipe. Fill the tank to the dip stick level with fresh oil and run the engine at a steady speed to check the oil circulation. The oil level should not exceed the "H" mark or fall below the "L" on the dipstick.
As the oil in the sump has been drained off, a moment or two will elapse before the scavenge side of the pump begins to return the oil to the tank. Run the engine for

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