Cleaning The Nozzles - Bosch EFEP 60H Manual Del Usuario

3. Preparing for testing
3.1 Preconditions
The preconditions to be taken into account when
testing and adjusting nozzle and holder assemblies
can be taken from the testing instructions for nozzle
and holder assemblies in ESI[tronic]. These testing
instructions are not part of the delivery specification.
!
Keep the workplace free of dirt and chips. Ensure
cleanliness is maintained during testing.
3.2

Cleaning the nozzles

¶
Clean new nozzles using ISO 4113 test oil or diesel
fuel.
¶
Clean used nozzles and components of the
dismantled nozzle holder in the ultrasound cleaning
unit.
i
When cleaning nozzles, pull the nozzle needle all the
way out of the body and clean both parts separately.
Clean with the nozzle body as vertical as possible,
with the injection orifices at the bottom.
!
The nozzle needle and nozzle body are matched to
each other and must be used as a pair.
Ultrasound cleaning procedure:
1. Dilute the cleaning fluid with water at a mixing ratio
of 1:20 by volume.
2. Heat cleaning bath to approx. 45 °C.
3. Carefully place the parts to be cleaned in the cleaning
fluid; the parts must be completely covered.
4. The cleaning duration depends on the degree of
contamination, but should be at least 10 minutes.
5. Immediately after the cleaning process rinse the
parts in a cold-cleaning product.
6. Blow parts dry using compressed air.
7. Immerse parts in test oil.
i
After cleaning in the ultrasound cleaning unit,
pintle type nozzles and hole-type nozzles of size
S and T that are contaminated and slightly coked
can be cleaned using the corresponding cleaning
needles from the KDEP 2900 (0 986 611 140) nozzle
cleaning tool. Finally, immerse the cleaning needle in
clean test oil or diesel fuel and insert into the nozzle
body.
Robert Bosch GmbH
Preparing for testing | EFEP 60H / EFEP 67D | 15
3.3 Connecting the nozzle and holder
assembly
The nozzles are adjusted and tested along with the
associated nozzle holders.
i
An overview of the pressure lines and reduction
fittings required for testing is provided on the last but
one page.
!
When clamping the nozzle into the nozzle holder
make sure that the sealing surface is clean and free
of damage.
!
On nozzle holders with locating pins, the nozzles
should be aligned such that the holder locating
pins engage in the nozzle holder locating pin holes
without any problems.
1. Place nozzle onto sealing surface of nozzle holder.
2. Tighten nozzle retaining nut by hand, centering the
nozzle while doing so.
3. Tighten with a torque wrench, observing the
tightening torque specified by the manufacturer.
!
When fitting the test pressure line, make sure that
there are large bending radii, as bending radii that
are too small reduce the cross section. The smallest
permissible bending radius is r = 50 mm.
!
The bending radius may not begin at the sealing
cone. When bending, a distance of 10 mm must
be maintained between the sealing cone and the
beginning of the bending radius.
4. Fit the required test pressure line and, if necessary,
the corresponding reduction fittings on the nozzle
tester.
i
See also "Important information for test pressure
lines" (1 689 979 929).
!
During fitting, the nozzle holder must be held in place
with a suitable tool so that the test pressure line
cannot be twisted during tightening or loosening.
5. If necessary, fit the test pressure line to the nozzle
holder with the corresponding connection adapter.
en
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1 689 979 086 2018-06-08