Hatz 2-4L31 - Page 145

Repair data
4
L / M . . / 07.96
Crankshaft .L 31 / .M 31
.L 30 / H .L 30 .L 40 / .M 40
.L 41 / .M 41
Regrinding during repairs mm 0.5 0.5
Hardness Rc 50 - 55 50 - 55
Hardening depth mm 2.5 2.5
Big end bearing internal (installed)
Normal ∅ mm 60
+0.083
64
+0.063
+0.040 +0.040
Wear limit ∅ mm 60.20 64.20
∅ mm 59.5
+0.083
63.5
+0.083
+0.040 +0.040
Wear limit ∅ mm 59.7 63.7
Normal wall thickness mm 1.468 - 1.480 1.468 - 1.480
Undersize mm 1.718 - 1.730 1.718 - 1.730
Internal (installed) main bearing.
Normal ∅ mm 72
+0.099
72
+0.099
+0.056 +0.056
Wear limit ∅ mm 72.25 72.25
Undersize ∅ mm 71.5
+0.099
71.5
+0.099
+0.056 +0.056
Wear limit ∅ mm 71.75 71.75
Wall thickness. normal mm 2.960 - 2.972 2.960 - 2.972
Undersize mm 3.210 - 3.222 3.210 - 3.222
Crankshaft endplay mm 0.15 - 0.65 0.15 - 0.65
Max. permissible bearing
clearance after waer mm 0.3 0.3