M&C TechGroup SP2500-H_C_I_BB_F Operator's manual - Manual (Page 21)

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Gas sampling and gas conditioning technology 2-1.1.5-ME
15.1 REPLACEMENT OF FILTER ELEMENT AND SEALS
W A R N I N G !
Prior to carrying out maintenance and repairs, it must be ensured
that no health-endangering contaminants remain in the probe. An
appropriate measure is to flush the probe with inert gas, for
example.
Before replacing the filter element, the sample gas supply must be
interrupted!
For replacement of the filter element or seals, the following procedure is recommended:

Remove protective cover after opening toggle-type fasteners.

Remove filter housing cover as described under 12.2.

Unscrew preliminary filter or sample tube from mounting adapter  (see Figure. 7).

Unscrew mounting adapter.

Unscrew filter knurled screw, inspect filter and replace if necessary.

Inspect filter element seals and replace if necessary.

Inspect O-tings in cover and replace if necessary.

Clean filter space.

Refit filter housing cover in reverse order and insert probe head.

Lock filter housing cover as described under12.2.

Fit protective cover.
N O T E !
Graphite seals in combination with the highly heated probe can
only be used a single time. Important to note after fitting the filter
housing cover that the U-bolt is tightened hand-tight in a cold
condition and retightened when the operating temperature is
reached.