SECTION 10 -- ENGINE -- CHAPTER 1
17
6-62720 -- 09 -- 2006
CRANKSHAFT AND BEARINGS DATA mm (in.)
Crankshaft .............................................. balanced with integral counterweights
Standard journal diameter ................................. 79.791 to 79.810 (3.1414 to 3.1421) (
1
)
Journal undersizes ....................................... 0.254 -- 0.508 -- 0.762 -- 1.016
(0.01 -- 0.02 -- 0.03 -- 0.04)
Standard main bearing shell thickness ...................... 2.168 to 2.178 (0.0854 to 0.0857)
Main bearing shell undersizes (internal diameter) ............. 0.254 -- 0.508 -- 0.762 -- 1.016
(0.01 -- 0.02 -- 0.03 -- 0.04)
Bearingshelltojournalclearance........................... 0.034 to 0.103 (0.0013 to 0.0041)
Maximumpermittedwearclearance......................... 0.180 (0.0071)
Standard crankpin diameter ................................ 63.725 to 63.744 (2.5089 to 2.5096) (
1
)
Crankpin undersizes ...................................... 0.254 -- 0.508 -- 0.762 -- 1.016
(0.01 -- 0.02 -- 0.03 -- 0.04)
Standard big--end bearing shell thickness .................... 1.805 to 1.815 (0.0711 to 0.0715)
Big--end bearing shell undersizes (internal diameter) .......... 0.254 -- 0.508 -- 0.762 -- 1.016
(0.01 -- 0.02 -- 0.03 -- 0.04)
Big--end bearing shell to crankpin clearance .................. 0.033 to 0.087 (0.0013 to 0.0034)
Maximumpermittedwearclearance......................... 0.180 (0.0071)
Standard crankshaft thrust washer thickness ................. 3.378 to 3.429 (0.133 to 0.135)
Thrustwasheroversizes(thickness) ........................ 0.127 -- 0.254 -- 0.381 -- 0.508
(0.005 -- 0.010 -- 0.015 -- 0.020)
Width of main bearing including thrust washers ............... 31.766 to 31.918 (1.2506 to 1.2566)
Width of corresponding crankshaft journal ................... 32.000 to 32.100 (1.2598 to 1.2638)
Crankshaft assembly endfloat .............................. 0.082 to 0.334 (0.0032 to 0.0131)
Maximum permitted wear endfloat .......................... 0.40 (0.0157)
Maximum ovality or taper of journals and crankpin after
regrinding ...............................................
0.01 (0.0004)
Maximum ovality or taper of journals and crankpin ............ 0.05 (0.002)
Maximum tolerance for alignment of crankshaft journals with
crankshaft supported on the two outer journals ...............
0.10 (0.0039)
Maximum tolerance for alignment, in both directions, of crankpins
(3--cylinder engines) or each pair of crankpins
(4--cylinder engines) relative to crankshaft journals ............
0.25 (0.0098)
Maximum tolerance for run--out between the outer surfaces of
thecrankshaftjournalsandthecrankshaftcentreline ..........
± 0.10 (0.004)
(continued)
(1) Crankshafts with 0.1 mm (0.0039 in.) undersize journals and crankpins and consequently undersize bearing shells may
be fitted in factory production.
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