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200 ENGINE INSTALLATION & TESTING
[233 FA] CHASSIS-MOUNTED
CHARGE AIR COOLING
Description
The Chassis-Mounted Charge Air Cooling
(CMCAC) system cools hot turbocharged air
before it enters the engine intake manifold. The
CMCAC system uses ambient air as a cooling
medium by allowing it to pass through a core
equipped with heat-exchanging fins.
Hot turbocharged air, varying in pressure from
0.0–25 psi (0.0–172 kPa), passes through core
tubes where heat is transferred to the ambient air
by heat-exchanging fins.
Front-section core construction consists of a
series of cold bars, cold fins and tube plates.
Side-section core construction consists of a
series of hot bars and hot fins.
Special Tool Required
앫
Charge Air Cooler Pressure Fixture J 41473
CMCAC Troubleshooting
205217
Symptom
Probable Cause
Remedy
Normal Boost — High Pyrometer
1. Core fin obstructions.
1. Clean core fins.
Low Boost — High Pyrometer
1. Restriction in ducting between air
cleaner and turbo.
1. Check for blockage and clean.
2. Dirty turbocharger.
2. Clean turbocharger.
3. Leaks in the pressurized side of the
induction system.
3. Check for and repair leaks.
4. Inlet manifold leak.
4. Check for loose or missing fittings,
plugs, and/or damaged manifold-to-
cylinder head gaskets. Replace missing
parts, and repair loose connections.
5. Open petcock (if equipped).
5. Close petcock.
6. Core leakage.
6. Pressure test core. Remove, repair or
replace core if test results are not
satisfactory.
Low Power
1. Restrictions in cooler.
1. Perform restriction pressure test. Clean
out restriction.
2. Restrictions in cooler inlet and outlet
tubes.
2. Disconnect and clean obstructions.
5-101.bk Page 6 Friday, March 17, 2006 11:05 AM
Summary of Contents for E7
Page 1: ...E7 ENGINE OVERHAUL AUGUST 1997 ENGINE 5 101...
Page 2: ...Page 0 front fr5 Page 0 Friday March 17 2006 11 04 AM...
Page 5: ...E7ENGINE OVERHAUL MARCH 2006 2 5M REP AUGUST 1997 10M MACK TRUCKS INC 1997 ENGINE 5 101...
Page 13: ...ABOUT THIS MANUAL Page ix ABOUT THIS MANUAL front fr5 Page ix Friday March 17 2006 11 04 AM...
Page 15: ...TABLE OF CONTENTS Page xi TABLE OF CONTENTS front fr5 Page xi Friday March 17 2006 11 04 AM...
Page 24: ...Page xx NOTES front fr5 Page xx Friday March 17 2006 11 04 AM...
Page 31: ...200 SPECIFICATIONS Page 2 1 SPECIFICATIONS 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 55: ...200 ENGINE REMOVAL Page 3 1 ENGINE REMOVAL 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 58: ...Page 3 4 NOTES 5 101 bk Page 4 Friday March 17 2006 11 05 AM...
Page 90: ...Page 4 32 NOTES 5 101 bk Page 32 Friday March 17 2006 11 05 AM...
Page 91: ...200 BENCH PROCEDURES Page 5 1 BENCH PROCEDURES 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 158: ...Page 5 68 NOTES 5 101 bk Page 68 Friday March 17 2006 11 05 AM...
Page 159: ...200 ENGINE ASSEMBLY Page 6 1 ENGINE ASSEMBLY 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 240: ...Page 6 82 NOTES 5 101 bk Page 82 Friday March 17 2006 11 05 AM...
Page 272: ...Page 8 10 NOTES 5 101 bk Page 10 Friday March 17 2006 11 05 AM...
Page 273: ...200 TROUBLESHOOTING Page 9 1 TROUBLESHOOTING 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 292: ...Page 9 20 NOTES 5 101 bk Page 20 Friday March 17 2006 11 05 AM...
Page 293: ...200 APPENDIX Page 10 1 APPENDIX 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 295: ...200 APPENDIX Page 10 3 E7 LUBRICATION SYSTEM 5 101 bk Page 3 Friday March 17 2006 11 05 AM...
Page 296: ...Page 10 4 200 APPENDIX E7 COOLING SYSTEM 5 101 bk Page 4 Friday March 17 2006 11 05 AM...
Page 297: ...INDEX Page 11 1 INDEX INDEX FR5 Page 1 Friday March 17 2006 11 04 AM...
Page 302: ...Page 11 6 NOTES INDEX FR5 Page 6 Friday March 17 2006 11 04 AM...
Page 303: ...E7 ENGINE OVERHAUL PRINTED IN U S A ENGINE 5 101 MACK TRUCKS INC 1997...