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EMISSION CONTROL SYSTEMS
6E-19
Fig.
6E-31
Pulse Air Valve Installation
A.I.R. SYSTEM SERVICE
Functional Test
1. Start engine and let idle in neutral or park.
2. Feel for presence of air exhausting out of the lower
portion of diverter valve. There should be no air exhausting.
3. Seal off vacuum supply to the diverter valve by
pinching the hose shut.
4. Keep hose pinched shut for at least one second.
5. Release hose.
6. There should be air exhausting out of the lower
portion of the diverter valve. Air will exhaust for about four
seconds. Replace diverter valve if air does not exhaust.
Fig.
6E-32
A.I.R. Belt Tensioning
P U M P PULLEY
Remove
1. Hold pump pulley from turning by compressing drive
belt then loosen pump pulley bolts.
2. Remove drive belt as outlined above then remove
pump pulley.
Install
1. Iristall pump pulley with retaining bolts hand tight.
Install and adjust drive belt as outlined above.
2. Hold pump pulley from turning by compressing drive
belt then torque pump pulley bolts to 24 lb. ft.
3. Recheck drive belt tension and adjust if required.
P U M P FILTER
DRIVE BELT
Remove
Inspection
1. Inspect drive belt for wear, cracks or deterioration and
replace if necessary.
2. Inspect belt tension and adjust if below 70 lbs. using
a belt tension gage.
Adjustment
Loosen pump mounting bolt and pump adjustment
bracket bolt. Move pump until belt is properly tensioned then
tighten adjustment bracket bolt and mounting bolt. Use a belt
tension gage to check adjustment (Fig. 6E-32).
C A UTI 0 N : Do not pry on the pump housing.
Distortion of the housing will result in extensive
damage to the Air Injection Pump.
Replace
1. Loosen pump mounting bolt and pump adjustment
bracket bolt, then swing pump until drive belt may be
removed.
1. Remove drive belt and pump pulley as previously
outlined.
2. Insert needle nose and pull fan from hub (see Fig.
6E-33).
NOTE: Care should be taken to prevent fragments from
entering the air intake hole. Do not insert a screwdriver
between pump and filter. It is seldom possible to remove
the filter without destroying it. Do not attempt to
remove the metal hub.
Install
1. Install the new filter by drawing it on with the pulley
and pulley bolts (Fig. 6E-34). Do not attempt to install a filter
by hammering it on or pressing it on.
2. Draw the filter down evenly by alternately torquing
the bolts. Make certain that the outer edge of the filter slips
into the housing. The slight amount of interference with the
housing bore is normal.
NOTE: The new filter may squeal upon initial operation
until it's O.D. sealing lip has worn in.
2. Install a new drive belt and adjust as outlined above.
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