Air Injection Filter: Service and Repair

Fig. 68 Removing centrifugal type air pump filter:

1. Remove drive pulley and outer disc from air pump.
2. Remove filter fan from pump, Fig. 68. Do not attempt to remove the metal drive hub.
3. Install new filter fan using the pulley and bolts. Alternately tighten bolts to draw fan down evenly. A slight interference between the fan and housing is normal. A new fan may make noise during initial operation, until its outer diameter sealing lip has worn in, after approximately 20---30 miles of operation.