54 5. Preparing For Testing; 55 5.1 Cleaning Instructions For Injectors; 55 5.2 Passenger Vehicle Injectors; 55 5.2.1 Preparing The Injection Chamber - Bosch CRI/CRIN 848H Manual Original

5. Preparing for testing
5.1 Cleaning instructions for injectors
Prior to clamping, clean injectors as described below.
!
Do not clean the nozzle cone with a brass brush,
steel brush or the like as this would damage the
injection orifices. Do not clean injection orifices with
the nozzle cleaning tool 0 986 611 140. Do not clean
the electrical connection of the injector with cold
cleaning agent.
1. Seal the inlet connection, return connection and
nozzle cone of the injector with protective caps or
cover over.
2. Use a plastic brush to remove any coarse dirt on the
injector.
3. Pre-clean the injector with cold cleaning agent.
!
Use the cleaning agent Tickopur TR 13 or a compa-
rable corrosion and coke-dissolving cleaning agent
for ultrasonic cleaning.
4. Remove the protective cap from the nozzle cone.
5. Attach the injector to a suitable holding device and im-
merse it in the ultrasonic bath until the nozzle retain-
ing nut is completely covered by the cleaning agent.
6. Set a cleaning temperature of 60 °C to 70 °C.
7. After approx. 15 minutes, take the injector/nozzle
holder out of the ultrasonic bath and blow dry with
compressed air.
i
After cleaning, always store injectors in a clean,
closed container to prevent the injectors coming
into contact with dirt particles (e.g. fluff, swarf).
i
Also heed the additional cleaning information in the
ESI[tronic] component repair instructions.
Robert Bosch GmbH
Preparing for testing | CRI/CRIN 848H | 73
5.2 Passenger vehicle injectors
ATTENTION - Risk of burns from hot sur-
faces
Hand burns may result from contact with
the hot surfaces of the test pressure line,
distributor rail or injection chamber.
¶
Allow the test pressure lines, distributor
rail and injection chamber to cool down.
¶
Wear protective gloves.
!
Never clamp injectors for testing if damaged or
severely corroded.
i
Injectors must always be cleaned
(refer to Section 5.1) before clamping for testing.
5.2.1 Preparing the injection chamber
!
Do not perform the test if the O-ring is missing
or damaged (Fig. 40, item 2). Always use genuine
Bosch O-rings.
1. Remove the O-ring (Fig. 40, item 2) and check for
cracks or other damage. Replace damaged O-rings
immediately (replacement part 1 680 210 123).
2. Insert the O-ring (Fig. 40, item 2) in the groove in
front of the injection chamber.
!
If the guide sleeve sticks when it is pushed onto the
nozzle retaining nut of the injector, this means that
either the retaining nut is very dirty or the inner sur-
face of the guide sleeve is damaged. In either case,
do not use the injector or guide sleeve.
3. Select the appropriate guide sleeve, making sure
that it is neither too small nor too large (refer to
item 39). It must be easy to push the guide sleeve
onto the nozzle retaining nut of the injector.
A) B)
Fig. 39: Guide sleeve with injector
A Guide sleeve with overly small inside diameter
B Guide sleeve with correct inside diameter
C Guide sleeve with overly large inside diameter
en
C)
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