Crankshaft, Main Bearings, and Flywheel
02
040
23
RG,RG34710,167 –19–05SEP02–1/1
Measure Assembled ID of Main Bearing Caps (Without Bearings)
1. With crankshaft removed from cylinder block, install
main bearing caps without bearing inserts.
2. Tighten main bearing cap screws to specification.
Specification
Crankshaft Main Bearing Cap
Screws—Final Torque 320 N•m (236 lb-ft)..........................................
3. Measure ID of all bearing caps with an inside
micrometer. Compare to specifications given.
If any main bearing cap assembled ID is not within
specification, blank (generic) bearing caps are
available and must be line bored to specification.
Replace individual bearing caps as needed.
Specification
Main Bearing Cap Bore
Specifications—ID Without
Bearings 133.097—133.123 mm
(5.2400—5.2411 in.)
..........................................................
Max. Bore Diameter Variation 0.013 mm (0.0005 in.).........................
Max. Bore Diameter Taper 0.005 mm (0.0002 in.)..............................
Max. Straightness (Any
Bore-to-Adjacent Bore) 0.038 mm (0.0015 in.)....................................
Max. Straightness (5 Center
Bores-to-Adjacent Bore) 0.076 mm (0.0030 in.)..................................
Centerline of Bore-to-Top Deck 429.92—430.07 mm
(16.926—16.932 in.)
..........................
IMPORTANT: Main bearing cap line boring should
be done ONLY by experienced
personnel on equipment capable of
maintaining bore specifications.
4. Measure main bearing cap surface width and
compare to following specifications.
Specification
Crankshaft Main Bearing Cap—
Surface Width 39.75—40.25 mm
(1.565—1.585 in.)
.........................................................
CTM100 (06APR04)
02-040-23
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=219
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