TB-9-2300-378-14
M48 & M60 SERIES VEHICLES
TECHNICAL BULLETIN; AIR INDUCTION SYSTEM MAINTENANCE
SEPTEMBER 1985
TB-9-2300-378-14 - Page 135 of 296
TB 9-2300-378-14
Table 6-2. Improved Clean Air Induction System Malfunction Index
MALFUNCTION
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
AIR CLEANER FILTER ELEMENTS REQUIRE CLEANING TOO OFTEN,
ACCOMPANIED BY:
A. EXCESSIVELY DIRTY ELEMENT
B.
LOW POWER AND EXCESSIVE BLACK EXHAUST SMOKE
SOOT AN D/OR MOISTURE ON FILTER ELEMENT AND/OR DARK COLORED
WATER OR MUD IN SCAVENGE TUBE OR CHECK VALVE.
HIGH FILTER CLOG INDICATOR READING DURING HEAVY SNOW OPERATION
ACCOMPANIED BY LOW POWER AND EXCESSIVE BLACK EXHAUST SMOKE.
NO FILTER CLOG INDICATOR READING ACCOMPANIED BY LOW POWER AND
EXCESSIVE BLACK EXHAUST SMOKE.
ENGINE REVERSAL: VEHICLE HAS STALLED AND ROLLED BACKWARD DOWN
AN INCLINE WITH TRANSMISSION IN A FORWARD GEAR
POWERPLANT WARNING AND DUST DETECTOR WARNING LIGHTS ON, ONE
(OR BOTH) DUST DETECTOR PRESSURE SWITCH(ES) TRIPPED, AND DUST
DETECTOR FILTER STRIP INDICATES CONTAMINATION OF INTAKE AIR BY:
A.
B.
C.
D.
E.
DUST - (COLOR OF LOCAL SURROUNDINGS)
FUEL - (CLEAR TO TAN IN COLOR - OILY FEELING)
SOOT, DRY - (GRAY TO BLACK IN COLOR, DUSTY, AND SMEARS)
OIL, BLACK, AND WET
WATER
POWERPLANT WARNING AND DUST DETECTOR WARNING LIGHTS ON, ONE
(OR BOTH) DUST DETECTOR PRESSURE SWITCH(ES) TRIPPED, BUT DUST
DETECTOR FILTER STRIP DOES NOT INDICATE CONTAMINATION OF INTAKE
AIR.
DUST DETECTOR WARNING LIGHT ON, POWER PLANT WARNING LIGHT OFF,
DUST DETECTOR PRESSURE SWITCH(ES) TRIPPED.
POWERPLANT WARNING LIGHT ON, DUST DETECTOR WARNING LIGHT OFF,
DUST DETECTOR PRESSURE SWITCH(ES) TRIPPED.
DUST DETECTOR PRESSURE SWITCH(ES) TRIPPED, BUT DUST DETECTOR
WARNING LIGHT AND POWERPLANT WARNING LIGHT DO NOT COME ON.
POWERPLANT WARNING LIGHT ON, DUST DETECTOR WARNING LIGHT ON,
BUT DUST DETECTOR PRESSURE SWITCH(ES) NOT TRIPPED.
POWERPLANT WARNING LIGHT NOT ON, DUST DETECTOR WARNING LIGHT
NOT ON, DUST DETECTOR PRESSURE SWITCH(ES) NOT TRIPPED, DUST
INGESTION IS APPARENT.
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