K 2500 Truck 4WD V8-454 7.4L (1990)
Air Injection Pump: Service and Repair
AIR Pump Mounting
Pump Filter Fan Service
REMOVAL
1. Hold pump pulley from turning by compressing drive, then loosen pump pulley bolts.
2. Loosen bolt, holding pump to mounting brackets, release tension on drive belts.
3. Move belts out of the way, then remove pump hoses, vacuum and electrical connections and control valve.
4. Pulley then pump.
5. If required, insert needle nose pliers and pull filter fan from hub.
INSTALLATION
1. Install pump assembly and tighten mounting bolts. Install hoses, electrical and vacuum connections.
