AR03.10-S-7311A | Remove/install piston rings | 9.2.95 |
ENGINE 111.948 /978 in MODEL 638
ENGINE 111.979 in MODEL 901, 902, 903, 904
S03.10-3002-06
1 Domed rectangular ring
2 Minute ring with heel
3 Chamfered edge ring with bit
4 Tubular spring
5 Hacken spring
6 Pliers
| Remove/install | ||
1 | Remove the piston | Engine 111.948/978 in model 638. | |
Engine 111.979 in model 901, 902, 903, 904. | |||
2 | Measure the height play of the rings (1, 2, 3) | ||
| |||
3 | Remove the rings (1, 2, 3) | | |
Installation: Measure the width of the new rings. Install rings of the same width. Pay attention to the installation position. "Top" or the manufacturer's make point towards the bottom of the piston. Fit the Hacken spring (5) with the oil scraper ring at 180° displaced respect to the stop (arrows). | |||
4 | Measure the stop play of the rings (1, 2, 3) | ||
| |||
5 | Installation in reverse order |
Test values
Number | Designation | Engine 111.948 | Engine 111.978 | Engine 111.979 | ||
BE03.10-N-1001-05C | Height play of ring | Groove 1 | mm | 0.1 | 0.1 | 0.1 |
Groove 2 | mm | 0.1 | 0.1 | 0.1 | ||
Groove 3 | mm | 0.1 | 0.1 | 0.1 | ||
BE03.10-N-1002-05C | Stop play of ring | Groove 1 | mm | 0.8 | 0.8 | 0.8 |
Groove 2 | mm | 1.0 | 1.0 | 1.0 | ||
Groove 3 | mm | 0.8 | 0.8 | 0.8 | ||
000 589 51 37 00
Pliers
Commercially available tools