C 1500 Truck 2WD V6-262 4.3L VIN Z (1992)
Air Injection Pump: Service and Repair
Pump Filter Fan Service
NOTE:
a.
The centrifugal filter fan should NOT be cleaned with either compressed air or solvents.
b.
The centrifugal filter fan should NOT be removed from the pump unless it is damaged, as removal will destroy the fan.
c.
Before removing the fan, note the following:
^
Do NOT allow any filter fragments to enter the AIR pump intake hole.
^
Do NOT remove the filter fan by inserting a screwdriver between the pump and filter fan. Damage to pump sealing lip will result.
^
Do NOT remove metal drive hub from the filter fan.
^
It is seldom possible to remove the filter fan without destroying it.
REMOVAL:
1.
Remove the AIR pump.
2.
Remove the pump pulley.
3.
Insert needle nose pliers and pull filter fan from the pump hub.
INSTALLATION:
1.
Install the new filter fan on pump hub.
2.
Install spacer and pump pulley against the centrifugal filter fan.
3.
Install the pump pulley bolts and tighten equally to 10 N-m (90 lb.in.). This will compress the centrifugal filter fan onto the pump hole. DO NOT
drive the filter fan on with a hammer. A slight amount of interference with the housing bore is normal. After a new filter fan has been installed, it
may squeal upon initial operation or until the O.D. of the sealing lip has worn in. This may require a short period of pump operation at various
engine speeds.
4.
Reinstall the AIR pump onto brackets.
