Removing
1. Where necessary, to facilitate access to the vacuum pump, remove the air intake (contact the head Power and exhaust systems).
2. Release the clamp and disconnect the vacuum hose from the pump.
3. Remove the nuts/bolts securing the pump to the left end of the cylinder head, then remove the pump. Remove the pump gasket - it must be replaced.
Installation
1. Clean and dry the contact surfaces of the pump and cylinder head and install a new gasket on the head.
2. Move the pump to the operating position by aligning the drive lug with the camshaft groove, then install the pump mounting nuts/bolts and tighten them.
3. Connect the vacuum hose to the pump, tighten the clamp and install the air filter intake duct.