Filter Drier - Hitachi SAMURAI Series Service Manual

3. Servicing
Cycle components

3.3.6 Filter drier

There are two possible main maintenance operations to do with the filter drier: the substitution of the inner core due to its
adsorption saturation or the substitution of the whole unit due to some damage.
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Solid core substitution
Follow the next steps in order to proceed to replace the inner core of the filter drier:
1 Remove the 8 screws (1) that fixes the top cov-
er (2). Carefully, remove the spring (3), the top
cover gasket (4), the wing nut (5) and the lock
washer (6).
2 Retire the top plate (7) and then the felt gasket
(8)
3 Take the solid core (9) out and proceed to the
replacement.
4 When reassembling after replacing the solid
core, perform the procedure in the reverse order
than removing.
N O T E
At reassembling, oil or grease the top cover gasket
and the thread of the cover screws.
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Filter drier unit replacement
Replace the filter drier unit if any leakage or malfunction is detected. Proceed following the steps explained below:
1 Protect the surroundings of the unit from the
heat of the blowtorch.
2 Remove the brazed parts using a blowtorch and
previously cooling the pipe side and the filter
drier unit with wet cloth in order to avoid brazing
material enter inside the pipes.
3 Unscrew the nuts of the clamping bracket to re-
lease the filter drier.
C A U T I O N
After blowtorch operations, filter drier and the sur-
roundings may be too warm. Take special care to
use insulation protection.
71
SMGB0097 rev.0 - 07/2015
1 2 3 4 5 6 7
Front view
Rear view
Brazed parts
8 9
Brazed parts
Clamping bracket
Clamping bracket
3