Test specifications for crankshaft
Número | Denominação | Engine 904.9 | Engine 902.9; 906.9, 924.9, 926.9 | |||
BE03.20-B-1001-02C | Diameter of the main neck | Normal | mm | 85.990...86.010 | 85.990...86.010 | |
Normal I | mm | 85.890...85.910 | 85.890...85.910 | |||
Repair I | mm | 85.740...85.760 | 85.740...85.760 | |||
repair II | mm | 85.490...85.510 | 85.490...85.510 | |||
repair III | mm | 85.240...85.260 | 85.240...85.260 | |||
repair IV | mm | 84.990...85.010 | 84.990...85.010 | |||
BE03.20-B-1005-02C | Radial play in the main necks | mm | 0.056...0.118 | 0.056...0.118 | ||
BE03.20-B-1007-02C | Internal diameter of sleeves of the main necks (assembled) | Normal | mm | 86.066...86.108 | 86.066...86.108 | |
Normal I | mm | 85.966...86.008 | 85.966...86.008 | |||
Repair I | mm | 85.816...85.858 | 85.816...85.858 | |||
repair II | mm | 85.566...85.608 | 85.566...85.608 | |||
repair III | mm | 85.316...85.358 | 85.316...85.358 | |||
repair IV | mm | 85.066...85.108 | 85.066...85.108 | |||
Crankcase, timing case cover, end cover
Número | Denominação | Engine 900.9, 902.9, 904.9; 906.9 | Engine 924.9; 926.9 | |||
BA01.40-B-1001-01B | Main bearing cap bolts to engine block | 1st stage | Nm | 30 | 30 | |
2nd stage | Nm | 80 | 80 | |||
3rd stage | Nm | 155 | 155 | |||
4th stage | Degrees | 90° | 90° | |||
001 589 53 21 00
Dial indicator
W03.20-0003-01
1 Clean the bearing points in the crankcase and main bearing cap with a chamoisleather.
2 Insert the crankshaft bearing shells (1, 2) in the crankcase and in the main bearing cap(3, 4) in the order indicated.
The securing lugs (arrows) on the crankshaft bearing shells (1, 2) must be located inthe grooves in the crankcase basic bores and main bearing caps (3, 4). The oil hole inthe crankshaft bearing shell and the crankcase must align.
W03.20-0004-01
3 Install main bearing caps (3, 4) with crankshaft bearing shells (1) in the crankcase.
All the main bearing caps (3) are fitted into the crankcase at the side (off-centered)and are marked with numbers (arrows). The main bearing caps (3, 4) must be installedstarting from the front, and in ascending order. They are not interchangeable. The mainbearing cap (4) for the fit bearing washers is also provided with a dowel pin.
4 Lubricate bolts for main bearing cap (6) and tighten them.
Shown on engine 904
W03.20-0005-01
5 Measure inner diameter of main bearing in crankcase with dial indicator and quick calipers at three points (A, B, C) (vertically and each about 30° up and downaway from the separation points) and note measurements..
The dimensions stated in the table must be maintained.
6 Take off main bearing caps (3, 4) again.
W03.20-0009-01
7 Measure the diameter of the crankshaft bearing journal with the outside micrometerand note down the measurements.
8 Calculate radial play of crankshaft bearings:
Test specification for inside dia. of main bearing
– Test specification for main bearing journal
= Crankshaft radial play
The crankshaft radial play can be adjusted by replacing the crankshaft bearing shells; inthis case, aim for the mean value of the radial play indicated. Crankshaft bearing shells arefactory-supplied ready for installation. No refacing is permissible.