Shown on engine 926.9 |
1 | Crankshaft |
2 | Bearing shell |
3 | Bearing shell |
4 | Thrust plate |
5 | Crankshaft bearing cap |
6 | Crankshaft thrust bearing cap |
7 | Bolt |
8 | Crankshaft gear |
9 | Dowel pin |
W03.20-1001-06
G03.20-A017-09
Shown on engine 900.9 |
1 | Crankshaft | 5 | Crankshaft bearing cap | 10 | Crankcase | ||
2 | Bearing shell | 6 | Crankshaft thrust bearing cap | B | Oil groove | ||
3 | Bearing shell | 7 | Bolt | L | Shank length | ||
4 | Thrust plates |
1 | Crankshaft |
8 | Crankshaft gear |
9 | Dowel pin |
11 | Camshaft sprocket |
A | Marking |
G03.20-3150-06
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 | ||
Topical note | Notes on self-locking nuts and bolts | ||
Note on calculation of tightening torque when using insertion or socket tools with various effective lengths | |||
Notes on hardness test | |||
Information on assessing wear of main bearings and main bearing journals | |||
Notes on work safety regulations for vehicles with natural gas-powered engines | |||
| Remove | ||
1 | Remove engine. | See information from body manufacturer. | |
2 | Remove timing case. | ||
3 | Remove oil pump. | ||
4 | Remove pistons. | ||
5 | Remove crankshaft bearing caps (5) and crankshaft thrust bearing cap (6). | ||
6 | Check marking of crankshaft bearing caps (5) and crankshaft thrust bearing cap (6). | If the marking is no longer recognizable: | |
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Mark the corresponding crankshaft bearing cap (5) and crankshaft thrust bearing cap (6) again. | |||
7 | Remove thrust plates (4) from crankshaft thrust bearing cap (6). | ||
8 | Remove bearing shells (3) from crankshaft bearing caps (5) and crankshaft thrust bearing cap (6). | ||
9 | Mark bearing shells (3) relative to the respective crankshaft bearing cap (5) and crankshaft thrust bearing cap (6). | ||
10 | Screw centering drifts into crankshaft (1) at the front and rear and fasten a suitable shackle to it. | Alignment punch | |
11 | Lift crankshaft (1) with the shackle out of crankcase (10) and set it down. | ||
12 | Remove crankshaft gear (8). | ||
13 | Take bearing shells (2) out of crankcase (10). | ||
14 | Mark bearing shells (2) relative to crankcase (10). | ||
| Check | ||
15 | Clean crankshaft (1) and oil duct in crankshaft (1) and check oil duct for continuity. | ||
16 | Visually check crankshaft (1) for damage, cracks, and galling. | If damage, cracks or galling is present: | |
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Replace crankshaft (1). | |||
17 | Clean bearing shells (2, 3) and main bearing journal of crankshaft (1) with a lint-free cleaning cloth and visually check for wear. | If wear is present, | |
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Replace or process affected parts. | |||
18 | Measure concentricity of crankshaft (1) at center main bearing journal. | ||
Variation in concentricity measured at middle main bearing journal (mounted at outer main bearing journals) | |||
Dial gage | |||
Dial indicator holder | |||
19 | Check hardness of main and connecting rod journals. | ||
Hardness of main bearing and connecting rod journals (Rockwell hardness) | |||
Hardness tester | |||
20 | Determine radial play of crankshaft main bearing. | ||
Main bearing journal Ø | |||
Fitted bearing journal width | |||
Main bearing journal width | |||
Radial play | |||
Main bearing inner Ø | |||
Bolt, main bearing cap to crankcase | |||
Dial gage | |||
21 | Determine connecting rod bearing radial play. | ||
Connecting rod bearing inside dia. with connecting rod bearing shells inserted | |||
Connecting rod bearing play | |||
Connecting rod bolt | |||
Connecting rod bearing journal Ø | |||
Connecting rod journal width | |||
Bolt, connecting rod bearing cap to connecting rod | |||
Dial gage | |||
Socket wrench bit | |||
22 | Mount crankshaft (1) axially. | Crankshaft thrust bearing cap (6) must be installed. | |
Fitted bearing journal width | |||
Axial play | |||
Wall thickness of fitted bearing thrust washers | |||
Dial gage | |||
23 | Measure shank length (L) of bolts (7) | Main bearing cover bolt | |
If permissible shank length (L) is exceeded, | |||
| |||
Fit appropriate new screw/bolt (7). | |||
24 | Check dowel pin (9) in crankshaft (1) for damage and tight seating. | If damage is present: | |
| |||
replace dowel pin (9). | |||
| Install | ||
25 | Remove metal abrasion from oil ducts and clean inner components. | Only if bearing damage has occurred. | |
26 | Coat treads of bearing shells (2) with engine oil. | ||
27 | Insert bearing shells (2) into crankcase (10). | | |
Observe marking and installation position of bearing shells (2) relative to crankcase (10). | |||
28 | Position crankshaft (1) with the shackle on bearing shells (2) in crankcase (10). | ||
29 | Remove shackle and centering drifts from crankshaft (1). | ||
30 | Coat treads of bearing shells (3) and thrust plates (4) with engine oil. | ||
31 | Insert bearing shells (3) into crankshaft bearing caps (5) and crankshaft thrust bearing cap (6). | Observe marking and installation position of bearing shells (3) relative to respective crankshaft bearing cap (5) and to crankshaft thrust bearing cap (6). | |
32 | Install crankshaft thrust bearing cap (6) with inserted bearing shell (3) and thrust plates (4). | Note installation position of thrust plates (4). The oil grooves (B) must point outward. | |
33 | Install crankshaft bearing caps (5) with inserted bearing shells (3). | Observe installation position of crankshaft bearing caps (5). Crankshaft bearing caps (5) are marked and must be installed in ascending order, starting opposite the output side. The crankshaft bearing caps (5) are shaped asymmetrically and can be installed only in one position. | |
34 | Wet bolts (7) with engine oil, insert in crankshaft bearing caps (5) and crankshaft thrust bearing cap (6) and tighten. | Bolt, main bearing cap to crankcase | |
35 | Manually turn crankshaft (1) and check for unobstructed movement. | ||
36 | Determine crankshaft main bearing end play (1). | ||
Axial play | |||
Dial indicator holder | |||
Dial gage | |||
If the permissible end play of the crankshaft main bearing is outside the tolerance: | |||
| |||
check thrust plates (4). | |||
Wall thickness of fitted bearing thrust washers | |||
37 | Perform additional checks in the event of engine repair work on the crankshaft (1). | ||
38 | Attach crankshaft gear (8) and align with camshaft sprocket (11). | Markings (A) on crankshaft gear (8) and camshaft sprocket (11) must face each other. | |
If markings (A) do not face each other, | |||
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Turn crankshaft (1) or camshaft sprocket (11). | |||
39 | Install pistons. | ||
40 | Install oil pump. | ||
41 | Install timing case. | ||
42 | Install engine. | See information from body manufacturer. | |
43 | Fill oil circuit. |
Check values for cylinder crankcase |
Number | Designation | Engine 900.9## ## up to 185258, 902.9## ## up to 185258 in model 000.001 | Engine 900.9## ## as of 185259, 902.9## ## as of 185259 in model 000.001 | ||
BE01.40-N-1007-02J | Main bearing cover bolt | Thread diameter | M | 14 | 14 |
Length of shank when new | mm | 114,0 | 134,0 | ||
Shank length | mm | 116,0 | 136,0 |
Check values for cylinder crankcase |
Number | Designation | Engine 904.9## ## up to 185258, 906.9## (except 906.90) ## up to 185258 in model 000.001 | Engine 904.9## ## as of 185259, 906.9## (except 906.90) ## as of 185259 in model 000.001 | ||
BE01.40-N-1007-02J | Main bearing cover bolt | Thread diameter | M | 14 | 14 |
Length of shank when new | mm | 114,0 | 134,0 | ||
Shank length | mm | 116,0 | 136,0 |
Check values for cylinder crankcase |
Number | Designation | Engine 924.9## ## up to 185258, 926.9## ## up to 185258 in model 000.001 | ENGINE 924.9## ## as of 185259, 926.9## ## as of 185259 | ||
BE01.40-N-1007-02J | Main bearing cover bolt | Thread diameter | M | 14 | 14 |
Length of shank when new | mm | 114,0 | 134,0 | ||
Shank length | mm | 116,0 | 136,0 |
Check values for connecting rods |
Number | Designation | ENGINE 900.9, 904.9 | ENGINE 902.9, 906.9 | ||
BE03.10-N-1001-01K | Connecting rod bearing inside dia. with connecting rod bearing shells inserted | Default | mm | 70,054...70,093 | 70,054...70,093 |
Deviation 0.1 | mm | 69,954...69,993 | 69,954...69,993 | ||
Deviation 0.25 | mm | 69,804...69,843 | 69,804...69,843 | ||
Deviation 0.5 | mm | 69,554...69,593 | 69,554...69,593 | ||
Deviation 0.75 | mm | 69,304...69,343 | 69,304...69,343 | ||
Deviation 1.0 | mm | 69,054...69,093 | 69,054...69,093 |
Check values for connecting rods |
Number | Designation | Engine 924.9, 925.9, 926.9 in model 000.001 | ||
BE03.10-N-1001-01K | Connecting rod bearing inside dia. with connecting rod bearing shells inserted | Default | mm | 70,054...70,093 |
Deviation 0.1 | mm | 69,954...69,993 | ||
Deviation 0.25 | mm | 69,804...69,843 | ||
Deviation 0.5 | mm | 69,554...69,593 | ||
Deviation 0.75 | mm | 69,304...69,343 | ||
Deviation 1.0 | mm | 69,054...69,093 |
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-1004-02K | Connecting rod bearing journal Ø | Standard | mm | 69,995...70,015 | 69,995...70,015 |
Deviation –0.1 | mm | 69,895...69,915 | 69,895...69,915 | ||
Deviation –0.25 | mm | 69,745...69,765 | 69,745...69,765 | ||
Deviation –0.5 | mm | 69,495...69,515 | 69,495...69,515 | ||
Deviation –0.75 | mm | 69,245...69,265 | 69,245...69,265 | ||
Deviation –1.0 | mm | 68,995...69,015 | 68,995...69,015 |
Check values of crankshaft |
Number | Designation | ENGINE 906.901/902 | ENGINE 904.9 | ||
BE03.20-N-1004-02K | Connecting rod bearing journal Ø | Standard | mm | 69,995...70,015 | 69,995...70,015 |
Deviation –0.1 | mm | 69,895...69,915 | 69,895...69,915 | ||
Deviation –0.25 | mm | 69,745...69,765 | 69,745...69,765 | ||
Deviation –0.5 | mm | 69,495...69,515 | 69,495...69,515 | ||
Deviation –0.75 | mm | 69,245...69,265 | 69,245...69,265 | ||
Deviation –1.0 | mm | 68,995...69,015 | 68,995...69,015 |
Check values of crankshaft |
Number | Designation | Engine 924.9, 925.9, 926.9 in model 000.001 | ||
BE03.20-N-1004-02K | Connecting rod bearing journal Ø | Standard | mm | 69,995...70,015 |
Deviation –0.1 | mm | 69,895...69,915 | ||
Deviation –0.25 | mm | 69,745...69,765 | ||
Deviation –0.5 | mm | 69,495...69,515 | ||
Deviation –0.75 | mm | 69,245...69,265 | ||
Deviation –1.0 | mm | 68,995...69,015 |
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
904 589 02 63 00
Alignment punch
000 589 20 21 00
Hardness tester
422 589 02 09 00
Socket wrench bit
363 589 02 21 00
Dial indicator holder