AR07.17-D-1060D | Remove/install pressure control valve | 8.1.09 |
ENGINES 612.981 ## from 846435 in MODELS 902.6, 903.6, 904.6, 905.6
D07.16-1280-05
1 Connector of pressure regulator valve
2 Sealing ring
3 Torx bolts
4 Rail
Y74 Pressure regulator valve
| Removing | ||
Danger! | Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel and risk of injury to eyes and skin caused by contact with fuel | No fire, sparks, open flames or smoking. Wear protective clothing when handling fuel. | |
1.1 | Detach charge air manifold at cylinder head and place to the side with engine wiring harness connected | Only on vehicles with code MD1, MS5, MF8 (exhaust gas recirculation). It is not necessary to separate the engine wiring harness at the vehicle side. | |
2 | Separate plug connection of pressure regulating valve (1) | ||
3 | Remove pressure regulator valve (Y74) | Sealing ring (2) must be replaced. To prevent the fine pores from getting clogged, do not the touch the strainer at the cone point of the pressure regulator valve with the fingers. | |
| Install | ||
4 | Clean sealing surfaces | ||
5 | Before installing the pressure regulator valve, grease the sealing ring (2) with a little special grease | If the seals are damaged when being installed, this may result in internal leaks which are not recognizable from the outside. | |
6 | Insert pressure regulator valve (Y74) | Tighten bolts at pressure regulator valve fully in stages. | |
| |||
7 | Fit together plug connection of pressure regulator valve (1) | ||
8.1 | Fit on charge air manifold at cylinder head | Only on vehicles with code MD1, MS5, MF8. (exhaust gas recirculation). | |
Danger! | Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running | Secure vehicle to prevent it from moving by itself. | |
9 | Inspect fuel system for leaks | Run engine, switch off and inspect for leaks. |
Common rail diesel injection (CDI)
Number | Designation | Engine 612.981 | |||
BA07.16-P-1005-01A | Bolt connecting pressure regulator valve to rail | Stage 1 | Nm | 3 | |
Stage 2 | Nm | 5 | |||
Repair materials
Number | Designation | Order number |
BR00.45-Z-1036-06A | Special grease | A 001 989 42 51 10 |
Referenced documents
- ar0941d1310a Remove/install charge air distribution pipe
- as0000z000501a Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.
- as4700z000101a Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel.