AR03.20-B-4465D | Machine crankshaft | 12.02.16 |
Cumbustion engine 476.932
Cumbustion engine 476.933
Cumbustion engine 476.934
Cumbustion engine 476.935
Cumbustion engine 476.937
A03.20-0017-06
1 Crankshaft
2 Counterweights
3 Counterweight screws
4 Gear
5 Guide pin
A Primary necks
B Connecting rod necks
C Width of the primary adjustment neck
D Width of the remaining primary necks
E Width of the connecting rod necks
F Fillet radius on the primary and connecting rod necks
G Bulging on the primary and connecting rod necks
Grind | |||
1 | Check the need and possibility of grinding the crankshaft (1). | Check the crankshaft necks and determine the degree of repair to be ground. If the crankshaft shows cracks and/or fissures, replace it. | |
2 | Remove the gear (4) of the crankshaft (1). | If necessary, strike with a plastic hammer. | |
3.1 | Remove the screws (3) and counterweights (2). | Only for a crankshaft with (false) counterweights screwed. In order to ensure the original positioning, identify the counterweights and their respective positions on the crankshaft. | |
4 | Grind the primary necks of the crankshaft (1). | The diameter of all primary necks should correspond to a single repair level. Note the matching of the repair level of diameter (A) of the primary neck and the width (C) of the adjustment neck (A) Standard or standard I - (C) Standard. (A) Repair I or Repair II - (C) Repair I. (A) Repair III or Repair IV - (C) Repair II. | |
Diameter of the primary necks (A). | |||
Width of the primary adjustment neck (C). | |||
Width of the remaining primary necks (D). | |||
Fillet radius on the necks (F). | |||
Bulging on the necks (G). | |||
Roundness and maximum taper. | |||
Maximum roughness on the necks. | |||
5 | Grind the connecting rod necks of the crankshaft (1). | The diameter of all connecting rod necks should correspond to a single repair level. | |
Diameter of the connecting rod necks (B). | |||
Width of the connecting rod necks (E). | |||
Fillet radius on the necks (F). | |||
Bulging on the necks (G). | |||
Roundness and maximum taper. | |||
Maximum roughness on the necks. | |||
6 | Wash the crankshaft (1) and remove any burrs and sharp edges from the lubrication holes. | Use diesel fuel or kerosene. Clean the holes with a cylindrical brush. | |
7 | Check the hardness of the primary and connecting rod necks, using an appropriate meter. | Replace the crankshaft in case of hardness lower than prescribed. | |
8.1 | Check the length (L) of the screws (3) securing the counterweights (2). | Only for a crankshaft with (false) counterweights screwed. Replace the screw (3) if the length (L) is greater than prescribed. | |
9.1 | Mount the counterweights (2) and the screws (3) on the crankshaft (1). | Only for a crankshaft with (false) counterweights screwed. Install in the correct order and position, note identification made upon removal. Slightly lubricate the thread and the seating face of the screws (3). | |
Counterweight fastening screws. | |||
10 | Perform the dynamic balancing of the crankshaft (1). | Crankshaft with counterweights and flywheel. | |
11 | Install the crankshaft (1) gear (4). | Replace the guide pin (5) of the gear. | |
12 | Install the crankshaft (1). | Install new bushings, corresponding to the repair level of the crankshaft necks. |
Test specifications for crankshaft
Número | Denominação | Engine 476.93 | |||
BE03.20-B-1001-02G | Diameter of main journals | Standard | mm | 103,98...104,00 | |
standard I | mm | 103,88...103,90 | |||
Repair stage I | mm | 103,73...103,75 | |||
Repair stage II | mm | 103,48...103,50 | |||
repair stage III | mm | 103,23...103,25 | |||
repair stage IV | mm | 102,98...103,00 | |||
BE03.20-B-1002-02G | Width of main thrust journal | Standard | mm | 46,000...46,062 | |
Repair stage I | mm | 46,500...46,562 | |||
Repair stage II | mm | 47,000...47,062 | |||
Width of remaining main journals | mm | 46,000...46,250 | |||
BE03.20-B-1003-02G | Diameter of connecting rod journal on crankshaft | Standard | mm | 89,98...90,00 | |
standard I | mm | 89,88...89,90 | |||
Repair stage I | mm | 89,73...89,75 | |||
Repair stage II | mm | 89,48...89,50 | |||
repair stage III | mm | 89,23...89,25 | |||
repair stage IV | mm | 88,98...89,00 | |||
BE03.20-B-1006-02G | Hardness of main journals and connecting rod journals (Rockwell hardness) | Minimum | HRC | 53...59 | |
BE03.20-B-1010-02G | Connecting rod journal width | mm | 46,0...46,1 | ||
BE03.20-B-1011-02G | Fillet radius on journals | main | mm | 4,2...4,5 | |
Connecting rods | mm | 3,7...4,0 | |||
BE03.20-B-1012-02G | Main journals and connecting rod outwards curve | mm | 0...0,004 | ||
BE03.20-B-1014-02G | Maximum out-of-round and taper on main and connecting rod journals | limit for reutilization | mm | 0,02 | |
New or machined shaft | mm | 0,01 | |||
BE03.20-B-1015-02G | Polished journals maximum roughness | (Rt) | mm | 0,0015 | |
BE03.20-B-1016-02G | Maximum dynamic unbalance | at 4000/min | Ncm | 0,6 | |
BE03.20-B-1017-02G | Length (L) of the bolts attaching the counterweights | new bolt | mm | 69,5...70,0 | |
Maximum for used bolts | mm | 71,2 | |||
Crankshaft
Referenced documents
- ar0320b4351g Remove/install crankshaft
- ar0320b4355b Measure crankshaft and remount in bearings