TB-9-2300-378-14 Technical Bulletin for Air Induction System M48 M60 Download
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TB 9-2300-378-14 j. Dust Detector Operational Test (Fig. 6-27). (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) 6-66 NOTE Operational test may be performed with powerplant out of vehicle if ground hop kit has starter cable modified to accommodate improved clean air system. If powerplant is out of vehicle, rig for powerplant test run with engine air cleaner (ground hop kit) (TM 20-1). NOTE Operational test is the same for both right and left sides. Open top deck grille doors. Remove dust and dirt from filter strip cover and compressor housing. Loosen three captive screws securing filter strip cover to compressor housing, but do not remove cover. Insert 1 inch wide strip of non-porous material (plastic, celluloid, etc.) over filter strip. Tighten three captive screws. Make sure area around vehicle is clear of personnel and equipment before performing step (6). Start engine. Apply vehicle brakes. Put transmission lever in high gear. Operate engine at 1800-1900 rpm for no more than 30 seconds. Observe powerplant and dust detector warning lamp. (a) If powerplant and dust detector warning lamps light, system is operational; go to step (7). (b) If powerplant and dust detector warning lamps do not light, check to see if dust detector switch tripped. A red plunger visible through plastic cover on switch indicates switch has tripped. If switch tripped, go to Troubleshooting Malfunction 10. If detector switch did not trip, repeat step 6 to verify. If switch still does not trip, replace dust detector switch (para. 6-17b). Stop engine. Loosen three captive screws securing filter strip cover to housing and remove non-porous material from filter strip and cover. Tighten three captive screws. Press plunger to reset pressure switch. Close top deck grille doors.