Filters - Bosch BEA 055 Manual Original

5.4.4

Filters

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When replacing the filters GF1, GF2 and GF3
always use original filters with the order no.
1 687 432 005.
If other filters are used (e.g. commercially available
fuel filters), the downstream measurement chambers
will be damaged by corrosion residue (e.g. rust
particles from metal filter elements) and inadequate
filter action.
!
Warranty and goodwill claims cannot be accepted
in the event of unit failure caused by the use of
incorrect filters.
The coarse filters remove particles and aerosols from
the measurement gas. Particles are solids such as
dust and soot. Aerosols are minute droplets of liquid.
These may be deposited in the gas path and the
measurement chambers and form coatings. Regularly
replace filters to prevent damage to the BEA 055.
Filter GF1
The coarse filter GF1 removes the coarsest particles
from the gas flow. It should therefore be replaced
most frequently. Replace the filter if severely
contaminated (fault message: poor flow) and also in
the event of HC residue. Depending on the rate of use
of the BEA 055, the filter should be replaced roughly
once a week.
Filter GF2
The coarse filter GF2 removes further particles and
aerosols from the gas flow. The greater the degree
of contamination of this coarse filter, the smaller the
pore size and the better the filter action. The water in
the exhaust gas soon causes the filter to become wet.
This moisture washes the aerosols out of the gas flow
and makes for even better particulate filtration.
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A wet coarse filter is therefore desirable!
Replace the filter if severely contaminated (fault
message: poor flow) and in the event of HC residue.
Depending on the rate of use of the BEA 055, the filter
should be replaced roughly once a month to once
a year.
Pump filter GF3
The coarse filter GF3 is designed to protect the
pumps. The coarse filter has to be replaced once a
year at most. Here, the filter action of a wet coarse
filter is also far superior to that of a dry coarse filter.
Robert Bosch GmbH
Maintenance | BEA 055 | 23 |
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Fig. 4: Replacing the coarse filter
Replacement of coarse filters GF2 and GF3
1. Detach the coarse filter (pos. 1) together with the
angular hose fittings (pos. 2) from the upper and
lower connection piece.
2. Detach both angular hose fittings from the coarse
filter by twisting gently and attach them to the new
coarse filter.
3. Attach the new coarse filter with angular hose
fittings to the connection pieces (installation
position as indicated on BEA 055).
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Affix the sticker 1 689 980 296 to each new coarse
filter GF3. The applicable date and the signature of
the person performing the work must be marked on
the stickers. The date provides a reference for the
replacement interval and the signature confirms
authorized coarse filter replacement. Use a non
water-soluble felt-tip pen for labeling the sticker.
Datum/Date
Unterschrift/Sign
459558/24 Ha
Fig. 5: Sticker 1 698 980 296
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1 689 989 111 2020-09-24