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COMPRESSED   AIR   AND   BRAKE   SYSTEMS
INSTRUMENTS   AND   INDICATORS

TM-9-2320-273-20 Truck 6 Ton 6x6 M939 M939A1 and M939A2 (Diesel) Manual
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TM   9-2320-273-20 Table 3-2. Composite Troubleshooting Symptop Index (Continued). Troubleshooting  lProcedures Malfunction Table Number ENGINE  (Continued). Erratic idle speed. 4-1 10 Excessive exhaust smoke during acceleration. 4-1 11 Excessive exhaust smoke throughout speed range. 4-1 12 High   fuel   consumption. 4-1 13 Low  oil  pressure. 4-1 14 No cab heat. 4-1 15 Excessive  exhaust  noise. 4-1 16 Exhaust  fumes  in  cab. 4-1 17 Engine  overheats 4-1 18 ENGINE  RETARDER  CONTROLS. No  retarding  action. 5-4 1 Retard  inoperative  in  one  or  two  selector  position. 5-4 2 ETHER   QUICK-START   CONTROLS. Solenoid  cannot  be  heard  to  click  when  ether button  is  pushed. 5-3 1 Towing  pintle  does  not  pivot  or  latch, or  jaw  is  stuck. 11-1 1 Excessive  jerking  of  towed  trailer. 11-1 2 Excessive  noise  or  popping  sounds  from  fifth wheel  when  turning. 11-1 3 Both  headlamps  blink  on  and  off. 5-8 1 One  headlamp  inoperative. 5-8 2 Both  headlamps  inoperative. 5-8 3 High  beam  indicator  inoperative. 5-8 4 3-13







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