© 2017 NTF
®
INST-OLFS6F-EN 120917-02
page 5
8. MAINTENANCE INSTRUCTIONS
The required maintenance on an OLFS-unit consists of the timely and properly changing of the filter
elements. Changing the filter elements should be done as follows:
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Only use original NTF® filter cartridges.
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Only use the supplied spare parts.
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The filter cartridges must be replaced when the pressure gauge indicates 5 Bar at operating
temperature, or every 6 months, whichever comes first.
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Check for pressure on the tank. Relief the pressure of the system when necessary.
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Ensure that the filter system is pressureless when replacing the filter cartridges.
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Remove the filter cartridges and spare O-rings from the packaging.
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Remove the lids from the system and take out the pressure plates with springs.
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Remove the used filter cartridges and place it in the plastic bags for proper disposal. Place the new
filter cartridges in the filter systems and place the pressure plates with springs back on the filter
cartridges. Replace the O-rings, clean the sealing surfaces and put the lids back on the filter system.
Tighten the inner hexagon bolts with a torque of minimal 9 Nm and maximal 12 Nm.
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Start the system until it has reached its operating temperature and check for leakages.
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Check if the Diesel runs through the filter properly.
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When using the minimess connectors on the manifold for oil analysis, make sure that the return line
is pressureless.