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ENGINE DIVISION SERVICE MANUAL
TM 5-4210-230-14&P-1
Fig. 66 Removing Centrifugal Air Filter Fan
Fig. 67 Installing Centrifugal Air Filter Fan
AIR INJECTION SYSTEM FUNCTIONAL
TEST (Not for California)
Perform air injection system functional test as follows:
(1)
Disconnect one air injection hose from check valve
and plug end of hose. (Fig. 68)
(2)
Disconnect other air injection hose from check valve
and connect air pump tester SE-2498, or equivalent,
to end of hose. (Fig. 68)
(3)
Connect tachometer to engine.
(4)
Operate engine at speed specified (see Emission
Control System Tune-Up Specifications).
(5)
Observe air pressure indicated. If air pressure does
not exceed minimum specification (see Emission
Control
Tune-Up
Specifications)
perform
the
following steps, a, b and c.
a.
Check air hoses for leaks. If leaks are found,
replace hose(s) and repeat steps 4 and 5.
b.
Check for flow of air through diverter valve
external exhaust ports. If air flows through
diverter valve external exhaust ports (Fig. 69),
valve is faulty and must be replaced. After
replacing diverter valve, repeat step b.
c.
If the air pump output pressure does not meet
minimum specifications, pump output is low
and the pump must be replaced. When
installing a new pump or adjusting the air
pump belt tension, do not pry on the pump
housing.
(6)
Operate engine at speed specified (see Emission
Control System Tune-Up Specifications).
Fig. 68 Checking Air Injection System Output Used on Small
V8 Engine (Except California)
CGES-215 Page 39
PRINTED IN UNITED STATES OF AMERICA
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