00-6 POWER TAKE OFF Symbol Meaning of symbol NPA0009E Oil pump (unidirectional flow) NPA0009E NPA0010E Check valve (swing check valve) NPA0010E NPA0011E Cylinder NPA0011E NPA0012E Flow control valve (decompression valve) (internal pilot method) NPA0012E NPA0013E Hydraulic switching valve (three-position valve) NPA0013E