Air Pump
Servicing of air pump is limited to replacement of centrifugal fan filter (if equipped) or the entire pump. Do not clamp pump in vise or use hammer on pump housing. To replace centrifugal filter, insert needle nose pliers between filter fins and break fan from hub. Install new fan, using pulley and bolts to draw down fan evenly.
NOTE:
Fan may have slight squeal until sealing lip is worn in. Air injection system is not completely noiseless. Normal noise increases in pitch as engine speed increases.
CAUTION:
If engine or compartment is to be cleaned with steam or high pressure liquids, fan filter should be masked off to prevent liquids from entering air pump.