AR03.20-W-4351A | Remove/install crankshaft | 19.5.09 |
ENGINES 902.9 in MODEL 957 with CODE (MS8) Natural gas engine
ENGINES 904.904 in MODEL 670
ENGINES 904.908 /914 /923 /936 in MODELS 668, 670
ENGINES 904.9 in MODEL 374, 375, 673, 674, 676, 958, 970, 972, 975, 976
ENGINES 906.9 in MODEL 374, 958, 970, 972, 974, 975, 976
ENGINES 906.9 in MODEL 374, 375, 950, 952, 953, 954, 957, 958
W03.20-0038-06
Engine 904.9
1 Crankshaft
2 Crankshaft bearing shell (above)
3 Crankshaft bearing shell (below)
4 Thrust washers (fit bearing)
5 Main bearing cap
6 Main bearing cap (fit bearing)
7 Main bearing cap bolts
8 Crankshaft sprocket
9 Pin
W03.20-1001-06
Engine 902, 906.9
1 Crankshaft
2 Crankshaft bearing shell (above)
3 Crankshaft bearing shell (below)
4 Thrust washers (fit bearing)
5 Main bearing cap
6 Main bearing cap (fit bearing)
7 Main bearing cap bolts
8 Crankshaft sprocket
9 Pin
W03.20-0039-09
Shown on engine 904.9
1 Crankshaft
2 Top crankshaft bearing shell
3 Bottom crankshaft bearing shell
4 Thrust washers (fit bearing)
5 Main bearing cap
11 Dial indicator
12 Dial indicator holder
L Shank length
6 Main bearing cap (fit bearing)
7 Main bearing cap bolts
8 Crankshaft sprocket
10 Camshaft sprocket
Modification notes
22.7.08 | Value changed: Fitted bearing, thrust plates wall thickness, standard | ||
Value changed: Fitted bearing, thrust plates wall thickness, deviation 0.3 | |||
Value changed: Fitted bearing, thrust plates wall thickness, deviation 0.5 |
| Removing | ||
1 | Remove engine | Model 668, 670 except engine 904.904 | |
Model 374.4, 375.1, 673, 674, 676, 958.0, 970, 972, 975, 976 | |||
Model 374.5, 375.3, 950, 952, 953, 954, 958.2 | |||
Model series 957 | |||
Model 670 with engine 904.904 No removal instructions have been created for this model. | |||
2 | Remove pistons | ||
3 | Remove oil pump | ||
4 | Remove timing case | Engine 904.9, Engine 902.9, 906.9 without rear engine power take-off | |
Engine 902.9, 906.9 with rear engine power take-off | |||
5 | Pull crankshaft sprocket (8) off crankshaft flange | ||
6 | Remove main bearing caps (5, 6) | Mark main bearing caps (5, 6) in the correct order. | |
On engine 904 the thrust plates of fitted bearing (4) are installed on the 5th main bearing cap (6). | |||
On engine 902, 906 the thrust plates of the fitted bearing (4) are installed on the 7th main bearing cap (6). | |||
7 | Remove crankshaft bearing shells (3) from main bearing cap (5, 6) | Mark crankshaft bearing shells (3) to respective main baring cap (5, 6). | |
8 | Lift crankshaft (1) out of crankcase using a lifting cradle | Attach shackle with belt pulley bolts and flywheel to the crankshaft (1). | |
9 | Remove crankshaft bearing shell (2) from crankcase | Mark crankshaft bearing shells (2) to crankcase. | |
10 | Clean crankshaft bearing shells (2, 3) and main bearing journal of the crankshaft (1) using a chamois leather and check for wear | If worn: | |
Measure crankshaft (1), mount in bearings. | |||
| Information on assessing wear of main bearings and main bearing journals | ||
11 | Clean main oil duct | Only if chips are present in the oil circuit. | |
12 | Clean oil ducts for crankshaft (1) with compressed air and check for passage | ||
13 | Measure main bearing cap bolts (7) | If shank length (L) is exceeded: | |
Replace respective main bearing cap bolt (7). | |||
| Install | ||
14 | Insert crankshaft bearing shells (2) into the crankcase | Observe identification for crankcase | |
15 | Install crankshaft (1) with a tackle | Attach shackle with belt pulley bolts and flywheel to the crankshaft (1). | |
16 | Insert crankshaft bearing shells (3) into main bearing cap (5, 6) | Observe identification for main bearing cap (5, 6). | |
17 | Install main bearing cover (5) | All main bearing caps (5) are inserted into the crankcase at the side off-centered from the middle and are marked with numbers (arrows). | |
Main bearing caps (5) must be installed according to numbers, in ascending order, beginning from the front of the crankcase, and must not be mixed up. | |||
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18 | Determine thickness of fitted bearing thrust washers (4) and install main bearing caps (6) | ||
Fitted bearing journal width | |||
Axial play | |||
Wall thickness of fitted bearing thrust washers | |||
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19 | Attach crankshaft sprocket (8) to crankshaft flange | Push on crankshaft sprocket (8); marking "I" on the crankshaft sprocket (8) must be positioned between the marking "I - I" of the camshaft sprocket (10) (arrow). | |
20 | Fit Connecting rod into bearings and install | ||
21 | Install pistons | ||
22 | Install oil pump | ||
23 | Install timing case | Engine 904.9, Engine 902.9, 906.9 without rear engine power take-off | |
Engine 902.9, 906.9 with rear engine power take-off | |||
24 | Replace oil-water heat exchanger | Only if chips are present in the oil circuit. | |
Engine 904.9 in model 668, 670 | |||
Engine 904.9 in model 374, 375, 673, 674, 676, 958, 970, 972, 975, 976 | |||
Engine 902.9, 906.9 | |||
25 | Install engine | Model 668, 670 except with engine 904.904 | |
Model 374.4, 375.1, 673, 674, 676, 958.0, 970, 972, 975, 976 | |||
Model 374.5, 375.3, 950, 952, 953, 954, 958.2 | |||
Model series 957 | |||
Model 670 with engine 904.904 No installation instructions have been created for this model. | |||
26 | Fill engine oil circuit |
Inspection data of crankcase
Number | Designation | Engine | Engine
| ||
BE01.40-N-1010-02B | Main bearing cover bolt | Thread Ø | M | 14 | 14 |
Length of shank when new | mm | 114,0 | 114,0 | ||
Shank length | mm | 116,0 | 116,0 | ||
Check values for a crankshaft
Number | Designation | Engine | Engine | ||
BE03.20-N-1002-02B | 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 | ||
BE03.20-N-1006-02B | Axial play | mm | 0.16...0.38 | 0.16...0.38 | |
BE03.20-N-1016-02B | Wall thickness of fitted bearing thrust washers | Default | mm | 3.240...3.310 | 3.240...3.310 |
Deviation 0.3 | mm | 3.390...3.460 | 3.390...3.460 | ||
Deviation 0.5 | mm | 3.490...3.560 | 3.490...3.560 | ||
Crankcase, timing case cover, end cover
Number | Designation | Engines 900.9, 902.9, 904.9, 906.9 | ||
BA01.40-N-1001-01C | Bolt from main bearing cap to crankcase | Stage 1 | Nm | 30 |
Stage 2 | Nm | 80 | ||
Stage 3 | Nm | 155 | ||
Stage 4 | ° | 90 | ||
001 589 53 21 00
363 589 02 21 00
Dial indicator holder
Dial indicator