FUSO 4M4 – LUBRICATION – STRUCTURE AND OPERATION – Oil Filter

• This oil filter is a spin-on paper-filter type that incorporates both a bypass filter and a full-flow filter.
• A bypass valve is installed in the lower part of the oil filter. When the filter elements are clogged, this valve opens to let the engine oil bypass the filter elements and flow directly to the main oil gallery, thereby preventing seizures in the engine.

 

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