136
ELECTRIC/ELECTRONIC SYSTEM
D
AILY
Base - May 2004
The hydraulic system consists of a low and high-pressure circuit, the former consisting of the following piping:
- connecting high-pressure output to the Rail;
- Common Rail;
- connecting the Rail and supplying electro injectors.
The low-pressure circuit consists of the following piping:
- fuel aspiration from tank to prefilter;
- supplying the pump and prefilter;
- supplying the high-pressure pump via the fuel filter.
The Rail exhaust circuit and the electro injectors complete the supply circuit.
The following are mandatory for safety reasons because of high-pressure levels inside this hydraulic system:
- avoid improper connection of high pressure piping junctions;
- avoid connecting high pressure piping with the engine running (useless and hazardous attempts at purging must be avoided!)
Low-pressure circuit integrity is essential to proper system operation, so mishandling and modifications must be avoided, with
immediate action required in case of leaks.
1. High pressure pump
-
2. High pressure line
-
3. Electro injector recriculation line
-
4. Electro injectors
-
5. Common
rail
-
6. Over pressure valve
-
7. Bypass valve
-
8. Filter
-
9. Priming pump
-
10. Tank
-
11. Mechanical supply pump
-
12. High pressure pump limiter valve
-
13. Pressure regulator
Figure 136
0003340t