![background image](http://html1.mh-extra.com/html/mack/e7/e7_service-manual_3065456157.webp)
200 BENCH PROCEDURES
Page 5-67
[222 KG] INJECTOR NOZZLES
1991 and later MACK E7 engines require
different fuel injection nozzles, nozzle holders
and nozzle holder assemblies than previous E7
engines.
These later nozzles (with eight spray holes) are a
Valve Covering Orifice (VCO) configuration and
are hydroground for proper fuel flow and
atomization.
Nozzles used for 1989/1990 MACK E7
production engine models feature six spray holes
and are not hydroground.
These parts are not interchangeable with eight-
spray-hole nozzles used in 1991 and later
engines. Refer to the following engine tune-up
publications for pertinent E7 specifications.
5-301............................. 1989
5-302............................. 1990
5-303............................. 1991
5-304............................. 1992
5-305............................. 1993
5-306............................. 1994
5-307............................. 1995
5-308.................... 1996/1997
Nozzle Cleaning
When servicing nozzle holder assemblies,
cleaning of nozzle tips may be necessary.
Special care must be taken when cleaning nozzle
tips to avoid damaging nozzle spray holes.
앫
Preferred cleaning method: ultrasonic
cleaning
앫
Acceptable cleaning method: brass brush/
wire wheel
ULTRASONIC CLEANING METHOD
Ultrasonic cleaning units such as J 29653-A, use
sound waves or mechanical vibrations,
approximately 55,000 cycles per second above
human hearing range. Sound waves are
generated by the transducer, which changes
high-frequency electrical energy into mechanical
energy.
The nozzles will be damaged if a steel-wire wheel
is used for cleaning. Damage can also occur if an
improper size and/or speed of brass-wire wheel is
used.
5-101.bk Page 67 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...