Dodge ram truck 3500 1996 Service Manual page 1166

9 - 176 5.9L (DIESEL) ENGINE —
S E R V I C E P R O C E D U R E S ( C o n t i n u e d )
B R
STANDARD MAIN JOURNAL DIAMETER
83.000 + 0 . 0 1 3 mm
(3.2677 ±0.0005 inch)
W O R N M A I N JOURNAL DIAMETER LIMIT
82.962 (3.2662 inch)
UNDERSIZES REGRIND TO
0.25 mm
(0.0098 inch)
82.750 + 0 . 0 1 3 mm
(3.2579 ± 0 . 0 0 0 5 inch)
0.50 mm
(0.0197 inch)
82.500 + 0 . 0 1 3 mm
(3.2480 + 0 . 0 0 0 5 inch)
0.75 mm
(0.0295 inch)
82.250 + 0 . 0 1 3 mm
(3.2381 ± 0 . 0 0 0 5 inch)
1.00 mm
(0.0394 inch)
82.000 + 0 . 0 1 3 mm
(3.2283 ± 0 . 0 0 0 5 inch)
OUT-OF ROUND & TAPER (MAX.)
0.005 mm (0.0002 inch)
ALL M A I N JOURNALS ARE TO BE PARALLEL
TO THE FRONT A N D REAR M A I N S W I T H I N :
0.030 mm (0.001 inch)
J9109-125
Fig. 29 Crankshaft Main Journal Dimensions
Thrust journals can be ground in the same incre­
ments and using the same specifications as all other
main journals. The main journal radius may be
ground using either the preferred or the alternative
procedure providing the thrust surface width is not
being ground. The preferred procedure must be used
when the main bearing thrust width surface is
ground. When the thrust surface width requires
grinding, the main journal must be ground to the
same undersize dimension (Fig. 30).
THRUST JOURNAL WIDTH
37.500 ± 0 . 0 2 5 mm
(1.4764 ± 0 . 0 0 1 inch)
UNDERSIZES REGRIND WIDTH TO
0.50
mm
38.000 ± 0 . 0 2 5 mm
(0.0197 inch) (1.4961 ± 0 . 0 0 1 inch
1.00 mm 38.500 ± 0 . 0 2 5 mm
(0.0394 inch) (1.5158 ± 0 . 0 0 1 inch)
J9109-127
Fig. 30 Crankshaft Thrust Journal Width
Dimensions
The thrust surface is to be ground on center within
0.10 mm (0.004 inch). I t also must be perpendicular
to the front and rear mains within 0.0015 mm
(0.00006 inch) per radial inch on the thrust area
(Fig. 31). The surface finish requirement is 0.04
micrometer (16.0 microinch).
JOURNAL
J9109-128
Fig. 31 Crankshaft Thrust Surface
PREFERRED PROCEDURE:
Smoothly blend a 4.20 ±0.020 mm (0.1654 ±0.0008
inch) radius to the ground diameters (Fig. 32).
ORIGINAL RADIUS
JOURNAL SURFACE
©
SURFACE FINISH
©
0.8 micrometer (32.0 microinch)
for a minimum of 4 5 ° into the
®
fillet beyond journal surface
®
1.6 micrometer (64.0 microinch)
for remainder of fillet
©
0.4 micrometer (16.0 microinch)
J9109-129
Fig. 32 Grind Crankshaft Main Journal—Preferred
Method