200 BENCH PROCEDURES
Page 5-61
Improved “Fast Ratio” Auxiliary
Driveshaft
An improved “fast ratio” auxiliary driveshaft
assembly and oil pump assembly are in current
production engines (effective February 27, 1992,
serial No. 2E1233) and are available for service.
These arrangements increase operating oil
pressure by approximately 25%.
앫
Current “fast ratio” oil pump:
—
With rear sump, part No. 315GC459AM
—
With front sump, part No. 315GC459AM2
—
Drive gear (12 teeth), part No. 683GB284
앫
Former “standard ratio” oil pump:
—
With rear sump, part No. 315GC460AM
—
With front sump, part No. 315GCA460AM2
—
Drive gear (13 teeth), part No. 683GB287
Do not mix “fast ratio” and “standard ratio”
components. Serious damage may occur.
Short (quarter) blocks are stamped with the date
of manufacture on the right rear side pad
(for example, “2G”: 2G =199
2
, March). Short
blocks stamped with “2G” or later (2H, 2K, 2L,
etc.) are equipped with a 1.5 fast ratio auxiliary
driveshaft assembly. It is critical that the matching
oil pump also be fitted with a 1.5 fast ratio oil
pump driveshaft gear.
A noncurrent 1.3 standard ratio E7 oil pump can
be reused in combination with a 1.5 fast ratio
auxiliary driveshaft assembly; however, several
steps are necessary to modify the pump.
Refer to Figure 5-74.
1. Obtain a 1.5 fast ratio oil pump driving shaft
gear (683GB284).
2. Restamp or etch new number on oil pump
housing.
—
“459M” on rear sump oil pumps
—
“459M2” on front sump oil pumps
Figure 5-74 — Marking Oil Pump
3. Install a 1.5 fast ratio oil pump driving shaft
gear on an old E7 oil pump. Torque retaining
nut to 60 lb-ft (81 N•m). Torque cylinder
block mounting screws to 40 lb-ft (54 N•m).
It is possible to bolt a current 1.5 fast ratio oil
pump driving gear in an engine with a noncurrent
1.3 standard ratio auxiliary driveshaft gear;
however, serious damage will occur.
It is not physically possible to bolt a noncurrent
1.3 standard ratio oil pump driving gear in an
engine with a current 1.5 fast ratio auxiliary
driveshaft gear.
200590a
STEEL STAMP
LAST 4 DIGITS OF
PART No."459M/M2"
IN THIS AREA .125
LETTERS
(BOTH VARIABLES)
459M
5-101.bk Page 61 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...