Page 94
TROUBLESHOOTING
EXCESSIVE BLUE OR WHITE SMOKE
EXHAUST GAS SEEPING INTO CAB
EXCESSIVE FUEL CONSUMPTION
Possible Cause
Correction
1. Code(s) present.
1. Correct cause of code(s).
2. No code(s) present, faulty cylinder.
2. Isolate faulty cylinder and repair as required.
3. EGR cooler leaking coolant into air/EGR inlet
tubes.
3. Pressure-test coolant side of EGR cooler by submersion using low
air pressure. Replace any coolers which produce bubbles through
EGR passages.
4. Low fuel pressure.
4. Check fuel lines and filters for blockage.
5. Engine lubricating oil level too high.
5. Drain excess lubricating oil. If the oil is contaminated with either fuel
or coolant, completely drain the oil pan. Change the oil filters.
Locate the source of the leak and correct. Fill with MACK-specified
engine oil. Check the oil level with the dipstick. DO NOT overfill.
6. Turbocharger passing oil.
6. Check for oil in the inlet manifold. Check for air inlet restriction
(clogged air filter). Repair or replace turbocharger as required.
7. Worn piston rings.
7. Determine and correct the root cause, and repair engine as
required.
8. Engine misfiring or running rough.
8. Check items as outlined in ENGINE MISFIRES — NO CODE(S)
chart.
Possible Cause
Correction
1. Cracked EGR valve housing.
1. Replace EGR valve.
2. Cracked EGR valve-to-cooler pipe including
expansion joint (bellows).
2. Inspect EGR valve-to-cooler pipe and correct or replace leaking
component(s).
3. Exhaust leak at EGR poppet valve.
3. Exhaust leak past EGR valve poppet stem and support bushing.
Replace EGR valve.
4. Exhaust leak at turbocharger inlet or exhaust
pipe.
4. Inspect, locate and repair exhaust leak.
Possible Cause
Correction
1. Code(s) present.
1. Correct cause of code(s).
2. Restrictions in the air induction system.
2. Inspect system. Remove restrictions and replace defective parts as
required.
3. External fuel system leakage.
3. Check external piping on fuel system for signs of fuel leakage.
Repair as required.
4. Defective injection nozzle assembly.
4. Isolate defective nozzle assembly. Repair and replace as required.
Refer to item 8 in ENGINE MISFIRES — NO CODE(S) chart.
5. Internal engine wear.
5. Determine and correct the root cause, and repair engine as
required.
6. Air conditioning system commanding the engine
cooling fan to be operating at all times.
6. If the engine fan is operating constantly, change the EECU
customer data to indicate that no A/C is installed. Check the
operation of the fan. If the fan disengages, restore the original
settings in the EECU and repair the A/C system.
5-111.bk Page 94 Monday, July 10, 2006 2:26 PM
Содержание ASET AC
Страница 6: ...TABLE OF CONTENTS Page iii TABLE OF CONTENTS 5 111 bk Page iii Monday July 10 2006 2 26 PM...
Страница 14: ...INTRODUCTION Page 1 INTRODUCTION 5 111 bk Page 1 Monday July 10 2006 2 26 PM...
Страница 23: ...Page 10 NOTES 5 111 bk Page 10 Monday July 10 2006 2 26 PM...
Страница 24: ...VISUAL IDENTIFICATION Page 11 VISUAL IDENTIFICATION 5 111 bk Page 11 Monday July 10 2006 2 26 PM...
Страница 28: ...DESCRIPTION AND OPERATION Page 15 DESCRIPTION AND OPERATION 5 111 bk Page 15 Monday July 10 2006 2 26 PM...
Страница 96: ...COMPONENT LOCATOR Page 83 COMPONENT LOCATOR 5 111 bk Page 83 Monday July 10 2006 2 26 PM...
Страница 99: ...Page 86 NOTES 5 111 bk Page 86 Monday July 10 2006 2 26 PM...
Страница 100: ...TROUBLESHOOTING Page 87 TROUBLESHOOTING 5 111 bk Page 87 Monday July 10 2006 2 26 PM...
Страница 140: ...MAINTENANCE Page 127 MAINTENANCE 5 111 bk Page 127 Monday July 10 2006 2 26 PM...
Страница 153: ...Page 140 NOTES 5 111 bk Page 140 Monday July 10 2006 2 26 PM...
Страница 154: ...REPAIR INSTRUCTIONS PART 1 Page 141 REPAIR INSTRUCTIONS PART 1 5 111 bk Page 141 Monday July 10 2006 2 26 PM...
Страница 383: ...Page 370 NOTES 5 111 bk Page 370 Monday July 10 2006 2 26 PM...
Страница 384: ...REPAIR INSTRUCTIONS PART 2 Page 371 REPAIR INSTRUCTIONS PART 2 5 111 bk Page 371 Monday July 10 2006 2 26 PM...
Страница 454: ...REPAIR INSTRUCTIONS PART 3 Page 441 REPAIR INSTRUCTIONS PART 3 5 111 bk Page 441 Monday July 10 2006 2 26 PM...
Страница 479: ...Page 466 NOTES 5 111 bk Page 466 Monday July 10 2006 2 26 PM...
Страница 480: ...SPECIFICATIONS Page 467 SPECIFICATIONS 5 111 bk Page 467 Monday July 10 2006 2 26 PM...
Страница 505: ...Page 492 NOTES 5 111 bk Page 492 Monday July 10 2006 2 26 PM...
Страница 506: ...SCHEMATIC ROUTING DIAGRAMS Page 493 SCHEMATIC ROUTING DIAGRAMS 5 111 bk Page 493 Monday July 10 2006 2 26 PM...
Страница 513: ...Page 500 NOTES 5 111 bk Page 500 Monday July 10 2006 2 26 PM...
Страница 514: ...SPECIAL TOOLS EQUIPMENT Page 501 SPECIAL TOOLS EQUIPMENT 5 111 bk Page 501 Monday July 10 2006 2 26 PM...
Страница 519: ...Page 506 NOTES 5 111 bk Page 506 Monday July 10 2006 2 26 PM...
Страница 520: ...APPENDIX Page 507 APPENDIX 5 111 bk Page 507 Monday July 10 2006 2 26 PM...
Страница 528: ...INDEX Page 515 INDEX Index fm Page 515 Monday July 10 2006 2 48 PM...
Страница 535: ...Page 522 NOTES Index fm Page 522 Monday July 10 2006 2 48 PM...