TB-9-2300-378-14 Technical Bulletin for Air Induction System M48 M60 Download
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TB 9-2300-378-14 Table 6-3. Improved Clean Air Induction System Troubleshooting - Continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION VEHICLE EXHAUST DUST EJECTOR SYSTEM (VEDES) 1. AIR CLEANER FILTER ELEMENTS REQUIRE CLEANING TOO OFTEN, ACCOMPANIED BY: A. EXCESSIVELY DIRTY ELEMENT Step 1. Inspect exhaust protector cap for free action or damage. Repair or replace as necessary. Step 2. Inspect precleaned and dust scavenge sections of air cleaner through inspection holes for plugging from dust, mud, or snow. Clean out as required. Step 3. Inspect scavenge tubes and hoses for loose clamps, holes, or cracks. a. Tighten or replace clamps as required (para. 6-16a). b. Replace tubes or hoses as required (para. 6-16a). Step 4. Inspect check valve for free action. Replace as necessary (para. 6-16 b). B. LOW POWER AND EXCESSIVE BLACK EXHAUST SMOKE Step 1. Inspect air intake at turret bulkhead for clogging or restriction. Clean out as necessary. Step 2. Inspect air cleaner intake hose for collapsed condition. Replace as necessary (para. 6-9). Step 3. Inspect engine intake manifold for leaks. Notify direct support to repair or replace. 2. SOOT AND/OR MOISTURE ON FILTER ELEMENT AND/OR DARK COLORED WATER OR MUD IN SCAVENGE TUBE OR CHECK VALVE. Step 1. Inspect exhaust protector cap for free action or damage. Repair or replace as necessary (TM 20-1). Step 2. Inspect check valve for free action. Replace as necessary (para. 6-16b). 3. HIGH FILTER CLOG INDICATOR READING DURING HEAVY SNOW OPERATION ACCOMPANIED BY LOW POWER AND EXCESSIVE BLACK EXHAUST SMOKE Inspect for heavy snow or ice accumulations in air cleaner filter compartment and precleaned dust scavenge sections. 4. NO FILTER CLOG INDICATOR READING ACCOMPANIED BY LOW POWER AND EXCESSIVE BLACK EXHAUST SMOKE. Step 1. Inspect and clean filter. Step 2. Start engine and look for reduction in exhaust smoke. Step 3. If a reduction in exhaust smoke occurs replace filter clog indicator; if not notify direct support maintenance. 5. ENGINE REVERSAL: VEHICLE HAS STALLED AND ROLLED BACKWARD DOWN AN INCLINE WITH TRANSMISSION IN A FORWARD GEAR Inspect insides of both air cleaner filter elements. Replace element if charring, soot, fuel, or burn holes are found inside, or if element seals show signs of excessive heat (para. 6-15). 6-14