AR03.20-G-4291-02DD | Determine crankshaft bearing radial play | ||
Caution | Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil | Wear protective gloves, protective clothing and safety glasses. | |
Topical note | Notes on avoiding damage through contamination and foreign objects | ||
Topical note | Notes on threaded connections fastened using a tightening angle-based tightening process | ||
Notes on work safety regulations for vehicles with natural gas-powered engines |
Check values of crankshaft |
Number | Designation | ENGINE 900.9 | ENGINE 902.9, 906.9 except 906.901/902 | ||
BE03.20-N-1001-02K | Main bearing journal Ø | Standard | mm | 85,990...86,010 | 85,990...86,010 |
Deviation –0.1 | mm | 85,890...85,910 | 85,890...85,910 | ||
Deviation –0.25 | mm | 85,740...85,760 | 85,740...85,760 | ||
Deviation –0.5 | mm | 85,490...85,510 | 85,490...85,510 | ||
Deviation –0.75 | mm | 85,240...85,260 | 85,240...85,260 | ||
Deviation –1.0 | mm | 84,990...85,010 | 84,990...85,010 |
Check values of crankshaft |
Number | Designation | ENGINE 906.901/902 | ENGINE 904.9 | ||
BE03.20-N-1001-02K | Main bearing journal Ø | Standard | mm | 85,990...86,010 | 85,990...86,010 |
Deviation –0.1 | mm | 85,890...85,910 | 85,890...85,910 | ||
Deviation –0.25 | mm | 85,740...85,760 | 85,740...85,760 | ||
Deviation –0.5 | mm | 85,490...85,510 | 85,490...85,510 | ||
Deviation –0.75 | mm | 85,240...85,260 | 85,240...85,260 | ||
Deviation –1.0 | mm | 84,990...85,010 | 84,990...85,010 |
Check values of crankshaft |
Number | Designation | Engine 924.9, 925.9, 926.9 in model 000.001 | ||
BE03.20-N-1001-02K | Main bearing journal Ø | Standard | mm | 85,990...86,010 |
Deviation –0.1 | mm | 85,890...85,910 | ||
Deviation –0.25 | mm | 85,740...85,760 | ||
Deviation –0.5 | mm | 85,490...85,510 | ||
Deviation –0.75 | mm | 85,240...85,260 | ||
Deviation –1.0 | mm | 84,990...85,010 |
Check values of crankshaft |
Number | Designation | ENGINE 900.9 | ENGINE 902.9, 906.9 except 906.901/902 | ||
BE03.20-N-1002-02K | Fitted bearing journal width | Standard Ø | mm | 85,990...86,010 | 85,990...86,010 |
Standard width | mm | 31,000...31,062 | 31,000...31,062 | ||
Ø deviation -0.1 | mm | 85,890...85,910 | 85,890...85,910 | ||
Standard width | mm | 31,000...31,062 | 31,000...31,062 | ||
Ø deviation -0.1 | mm | 85,890...85,910 | 85,890...85,910 | ||
Width deviation 0.3 | mm | 31,300...31,362 | 31,300...31,362 | ||
Ø deviation -0.25 | mm | 85,740...85,760 | 85,740...85,760 | ||
Width deviation 0.3 | mm | 31,300...31,362 | 31,300...31,362 | ||
Ø deviation -0.5 | mm | 85,490...85,510 | 85,490...85,510 | ||
Width deviation 0.5 | mm | 31,500...31,562 | 31,500...31,562 | ||
Ø deviation -0.75 | mm | 85,240...85,260 | 85,240...85,260 | ||
Width deviation 0.5 | mm | 31,500...31,562 | 31,500...31,562 | ||
Ø deviation -1.0 | mm | 84,990...85,010 | 84,990...85,010 | ||
Width deviation 0.5 | mm | 31,500...31,562 | 31,500...31,562 |
Check values of crankshaft |
Number | Designation | ENGINE 906.901/902 | ENGINE 904.9 | ||
BE03.20-N-1002-02K | Fitted bearing journal width | Standard Ø | mm | 85,990...86,010 | 85,990...86,010 |
Standard width | mm | 31,000...31,062 | 31,000...31,062 | ||
Ø deviation -0.1 | mm | 85,890...85,910 | 85,890...85,910 | ||
Standard width | mm | 31,000...31,062 | 31,000...31,062 | ||
Ø deviation -0.1 | mm | 85,890...85,910 | 85,890...85,910 | ||
Width deviation 0.3 | mm | 31,300...31,362 | 31,300...31,362 | ||
Ø deviation -0.25 | mm | 85,740...85,760 | 85,740...85,760 | ||
Width deviation 0.3 | mm | 31,300...31,362 | 31,300...31,362 | ||
Ø deviation -0.5 | mm | 85,490...85,510 | 85,490...85,510 | ||
Width deviation 0.5 | mm | 31,500...31,562 | 31,500...31,562 | ||
Ø deviation -0.75 | mm | 85,240...85,260 | 85,240...85,260 | ||
Width deviation 0.5 | mm | 31,500...31,562 | 31,500...31,562 | ||
Ø deviation -1.0 | mm | 84,990...85,010 | 84,990...85,010 | ||
Width deviation 0.5 | mm | 31,500...31,562 | 31,500...31,562 |
Check values of crankshaft |
Number | Designation | Engine 924.9, 925.9, 926.9 in model 000.001 | ||
BE03.20-N-1002-02K | Fitted bearing journal width | Standard Ø | mm | 85,990...86,010 |
Standard width | mm | 31,000...31,062 | ||
Ø deviation -0.1 | mm | 85,890...85,910 | ||
Standard width | mm | 31,000...31,062 | ||
Ø deviation -0.1 | mm | 85,890...85,910 | ||
Width deviation 0.3 | mm | 31,300...31,362 | ||
Ø deviation -0.25 | mm | 85,740...85,760 | ||
Width deviation 0.3 | mm | 31,300...31,362 | ||
Ø deviation -0.5 | mm | 85,490...85,510 | ||
Width deviation 0.5 | mm | 31,500...31,562 | ||
Ø deviation -0.75 | mm | 85,240...85,260 | ||
Width deviation 0.5 | mm | 31,500...31,562 | ||
Ø deviation -1.0 | mm | 84,990...85,010 | ||
Width deviation 0.5 | mm | 31,500...31,562 |
Check values of crankshaft |
Number | Designation | ENGINE 900.9 | ENGINE 902.9, 906.9 except 906.901/902 | ||
BE03.20-N-1015-02K | Main bearing inner Ø | Standard | mm | 86,066...86,108 | 86,066...86,108 |
Deviation 0.1 | mm | 85,966...86,008 | 85,966...86,008 | ||
Deviation 0.25 | mm | 85,816...85,858 | 85,816...85,858 | ||
Deviation 0.5 | mm | 85,566...85,608 | 85,566...85,608 | ||
Deviation 0.75 | mm | 85,316...85,358 | 85,316...85,358 | ||
Deviation 1.0 | mm | 85,066...85,108 | 85,066...85,108 |
Check values of crankshaft |
Number | Designation | ENGINE 906.901/902 | ENGINE 904.9 | ||
BE03.20-N-1015-02K | Main bearing inner Ø | Standard | mm | 86,066...86,108 | 86,066...86,108 |
Deviation 0.1 | mm | 85,966...86,008 | 85,966...86,008 | ||
Deviation 0.25 | mm | 85,816...85,858 | 85,816...85,858 | ||
Deviation 0.5 | mm | 85,566...85,608 | 85,566...85,608 | ||
Deviation 0.75 | mm | 85,316...85,358 | 85,316...85,358 | ||
Deviation 1.0 | mm | 85,066...85,108 | 85,066...85,108 |
Check values of crankshaft |
Number | Designation | Engine 924.9, 925.9, 926.9 in model 000.001 | ||
BE03.20-N-1015-02K | Main bearing inner Ø | Standard | mm | 86,066...86,108 |
Deviation 0.1 | mm | 85,966...86,008 | ||
Deviation 0.25 | mm | 85,816...85,858 | ||
Deviation 0.5 | mm | 85,566...85,608 | ||
Deviation 0.75 | mm | 85,316...85,358 | ||
Deviation 1.0 | mm | 85,066...85,108 |
001 589 53 21 00
Dial gage
1 | Clean the main bearing journals of the crankshaft (1) with a lint-free cleaning cloth. |
2 | Measure diameter of main bearing journal of crankshaft (1) with an outside micrometer (2) in three measuring directions (A, B, C) offset by approx. 60°. Calculate a mean value using the three measurement values. |
If a measurement value is outside the tolerance: | |
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Replace or machine crankshaft (1). |
W03.20-1110-06
3 | Assign the respective bearing shell (4, 5) based on the calculated mean value to the main bearing journal. |
Observe crankshaft (1) machining stage (standard or deviation). |
If all the diameters of the main bearing journal do not have the same machining stage, |
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replace or machine the crankshaft (1) if necessary. |
4 | Clean the bearing shells (4, 5), bearing cap (3) and the mount in crankcase (6) with a lint-free cleaning cloth. |
5 | Check the bearing shells (4, 5), bearing cap (3) and the mount in crankcase (6) for wear and damage. |
No reworking may take place on the bearing shells (4, 5). The bearing shells (4, 5) are supplied ex works ready to install and are also available in oversizes for repair. |
If wear can be detected and all the diameters of the main bearing journals are within the tolerance, | |
| |
Replace bearing shells (4, 5). |
W03.20-1111-06
6 | Match bearing shells (4, 5) to main bearing positions and install. |
Note installation position of the bearing shells (4, 5) for mounting in the crankcase (6) and the bearing cap (3). The bearing shell (5) with the oil groove comes into the crankcase (6). |
Shown on engine 900.9
7 | Slightly wet the screws (7) with engine oil. |
8 | Attach the bearing caps (3) to the cylinder crankcase (6) with the screws (7) . |
The bearing caps (3) are marked and must be installed in increasing order starting at the engine's output side. The bearing caps (3) are shaped asymmetrically and can only be mounted in one position. |
W03.20-1112-06
9 | Set dial indicator and quick connect caliper for inside measurement, set using an outside micrometer to smallest dimension for stage in question (comply with initial tension of 5 mm) and set scale on dial indicator to "0". |
W03.20-1113-06
10 | Measure the main bearing inside diameter in crankcase (6) with quick caliper for inside measurement. Using measuring device, start (D) 90° offset from separating point (arrows) and measure each additional measuring direction (E, F) offset by approx. 60°. Calculate mean value of main bearing using the three values measured. |
The preset dimension and measurement value together yield the inside diameter of the main bearing. If a measurement value is out of tolerance, insert new bearing shells and repeat measuring procedure. |
11 | Determine main bearing radial play. To do, subtract the mean value of the diameter for the main bearing journal from the mean value of the inside diameter of the main bearing. |
Example: 86.098 mm 86.003 mm = 0.095 mm |
12 | Perform work procedure and measuring procedure on all main bearings and main bearing fitted bearings in the same manner. |
The inside diameter of the main bearings and main bearing journals must have the same machining stage (standard or deviation) to achieve the correct main bearing play. |
13 | Remove all bearing caps (3). |
To calculate the axial play of the crankshaft (1), leave the main bearing fitted bearing cap installed. |