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MDE-4334C Atlas Start-up and Service Manual · April 2008
Hydraulic/Mechanical Components
Filters and Strainers
2
Install a cleaned or new strainer, inserting the cupped side into the filter manifold. Ensure that
it is fully inserted.
3
Coat the new filter gasket with a thin film of clean oil, as shown in
4
Attach the filter to the hydraulic manifold and turn the filter clockwise until the gasket
contacts the base. Then, hand-tighten an additional half turn.
5
Restore power to the unit.
6
Open the shear valve on dispensers.
7
Lift the nozzle hook and authorize the pump.
8
Check for leaks.
9
Bleed air by dispensing 10 gallons (40 liters) into an approved container for each hose
involved.
10
Check for leaks again.
Service Tips
• Only hand-tighten the filter. Do not use a filter wrench to tighten.
• A light coating of oil on the gasket helps the seal to seat properly and allows for easier
release at the time of removal.
• Use of a filter and strainer is required to ensure warranty. Units that do not use filters will
commonly experience reduced life of hydraulic components. Use of only strainers for very
cold weather and diesel fuels is acceptable. However, filters should be used when warm
weather returns. The use of only a strainer will not ensure long life of hydraulic
components.
About Strainers
Strainers are installed between the manifold and filter to trap larger particles leaving the fine
filtering to be done by the filter element. The strainer helps to prolong filter life by preventing
premature filter clogging. Strainers can also help reduce the frequency of filter change,
resulting from fungus and slime conditions. Always reinstall or replace the strainer.