MP Filtri DEH Series, Operator'S Manual

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7. Servicing
7.1 General Information
Servicing and maintenance work should be carried out periodically. The operational safety, longevity, and suitability for
use of the indicator all depend on regular and careful maintenance.
7.2 Torque Values
Indicator Body to Cavity
Indicator Pressure Rating Torque Rating
420 bar 100 N∙m + 10 N∙m
7.3 Service Measures
• Spare parts must fulfil the technical requirements that are specified by the manufacturer. This is always guaranteed for
original spare parts.
• Keep tools, working area and equipment clean.
• After removing the indicator, clean all parts, check for damage or wear and replace parts if necessary.
• When changing an indicator, it is essential that a high level of cleanliness must be maintained.
• When an indicator is removed the cavity should be covered to prevent contamination.
7.4 Service Intervals
The clogging indicator must be included in the recurrent testing of the electrical system in accordance with EN 60079-17.
7.5 Seal Replacement
If slight or severe leakage is detected from the indicator port, then the elastic seals may need replacing.
The system must be isolated and prepared for maintenance in accordance with Section 4 of this manual.
Once the hydraulic system is deemed safe and the appropriate permissions have been granted, remove the indicator from the
filter assembly with a 25mm spanner. Ensure that the sealing faces are not damaged during the removal process. Remove the
existing seals carefully, ensuring the sealing grooves are not damaged. Inspect the sealing faces for damage and ensure they are
free from contamination. Replace the seals with those outlined in Section 5.1. Only genuine replacement parts should be used.
The elastic seals should be wetted with clean operating fluid and stretched on for assembly, with care taken not to roll
the seals into the grooves. Check the indicator cavity for contamination and clean if necessary. Install the indicator as
per Section 4.2
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Operators Guide