Rail Pressure Sensor - Comparison Test; Connecting The Pressure Sensor (Engine Running With N-1 Cylinders) - Bosch Diesel Set 3.1 Manual Original

4.2 Rail pressure sensor – Comparison
test
!
The ignition must be switched off before the pressu-
re sensor is connected or disconnected.
4.2.1 Connecting the pressure sensor
(engine running with n–1 cylinders)
Abb. 15: Example of connecting the rail pressure sensor for a
comparison test (engine running with n-1 cylinders)
1 Injector high-pressure connection
2 180 MPa hose assembly
3 Digital pressure display unit
4 Pressure limiter test oil return connection (180 MPa)
5 Pressure sensor with rail pressure sensor, pressure limiter
1. Clean the rail and injectors completely with cold clea-
ner and blow dry with compressed air.
2. At a readily accessible injector, disconnect the high-
pressure hose assembly from the injector and rail.
!
Ensure that no test oil spills onto the radiator hoses
and drive belt. The radiator hoses and drive belt are
not resistant to the test oil.
!
For safety reasons, a pressure limiter that limits the
pressure to 180 MPa is incorporated into the pres-
sure sensor (fig. 15, item 5). Be sure to attach the
provided hose to the connection (fig. 15, item 4) on
the pressure sensor and direct it into a collecting
container suitable for diesel fuel.
3. Seal the injector high-pressure connection (fig. 15,
item 1) with a protective cap (see spare parts list for
Bosch ESI[tronic]).
4. Using the appropriate connection adapter, angle, nut
and compression ring (left-hand thread), connect
the 180 MPa hose assembly (fig. 15, item 2) to the
rail.
5. Connect the 180 MPa hose assembly to the pressure
sensor (fig. 14, item 5).
Robert Bosch GmbH
Testing | Diesel Set 3.1 | 29
6. Tighten all threaded connections. When tightening,
use a second hex key to keep the hose fitting on the
pressure module and injector from turning.
7. Attach the connecting cable to the pressure display
unit (fig. 15, item 3) and rail pressure sensor of the
pressure sensor.
8. Press the power key on the digital pressure display
for about 1 second.
en
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1 689 989 210 2015-10-20