Remove left cover. See Group 46.
Drain engine oil. See Group 00.
Place motorcycle on side stand.
Position a drip tray beneath the engine.
Remove drain plug (1) from water pump.
Hold a funnel below the drain and open the radiator cap.
Drain off all the coolant.
Place motorcycle on its centre stand.
Remove the gear shift pedal.
Remove the starter motor. See Group 12.
Disconnect clutch cable at releaser shaft.
Disconnect the oil return line from the engine and the oil tank.
Disconnect the oil line from the cylinder head.
Using hose clip pliers, BMW # 17 5 500, remove hose clips (13).
Remove water pump cover (2) with seal (3).
Drive out pin (5) and remove impeller (4).
Remove left engine cover (9).
Press out sealing rings (7, 8).
Remove shaft (6) by pulling inwards.
Remove washer (10), pin (11) and gear (12).