LUBRICATION SYSTEM


  1. CONSTRUCTION


    1. Oil Pump Assembly


      1. The trochoidal type oil pump assembly is driven by the crankshaft, and fits compactly inside the oil pan.

      2. A relief valve has been provided on the oil pump assembly, thus, any excessive pressure rises are restrained and friction loss is reduced.

        Figure 1. Models with Element Kit Type Oil Filter

        B005KVEC04
        *1 Crankshaft *2 Oil Pump Assembly
        *3 Relief Valve - -

        Figure 2. Models with Cartridge Type Oil Filter

        B005KXYC01
        *1 Crankshaft *2 Oil Pump Assembly
        *3 Relief Valve - -

    2. No. 1 Oil Nozzle Sub-assembly


      1. No. 1 oil nozzle sub-assemblies for cooling and lubricating the pistons are provided in the cylinder block sub-assembly.

      2. These No. 1 oil nozzle sub-assemblies contain a check ball to prevent oil from being fed when the oil pressure is low. This prevents the overall oil pressure in the engine from dropping.

        B005KRBC03
        *1 Cylinder Block Sub-assembly *2 No. 1 Oil Nozzle Sub-assembly
        *3 Check Ball - -
        *a No. 1 Oil Nozzle Sub-assembly Cross Section - -
        B005KT0 Oil - -

    3. Oil Filter Element (Models with Element Kit Type Oil Filter)


      1. A replaceable oil filter element is used. The oil filter element uses a high-performance filter paper to improve filtration performance. It is also combustible for environmental protection.

        B005KZBC03
        *1 Oil Filter Bracket Sub-assembly *2 Oil Filter Element
        *3 O-ring *4 Oil Filter Cap Assembly

        Tech Tips

        The engine oil maintenance interval for a model that has an oil filter with a replaceable oil filter element is the same as that for a conventional model.