PRESSURE REDUCING TYPE PILOT VALVE

摘要

PROBLEM TO BE SOLVED: To provide a pressure reducing type pilot valve which can smoothly actuate a push rod without forming an oil groove on a wall surface of a hole of a casing faced to the push rod, nor forming an oil groove on a peripheral side surface of the push rod. SOLUTION: A stepped portion 14d is formed between a rod portion 14a and a cylindrical portion 14b of a push rod 14, to form a first oil chamber 16 between an upper portion of the cylindrical portion 14b and a casing 1. A second oil chamber 11 is formed between the cylindrical portion 14b and the casing 1 on a lower side of the cylindrical portion 14b. The first oil chamber 16 is communicated with the second oil chamber 16 through a third oil chamber defined by an abutting surface 15a and a separation surface 15b of a spring seat 15, and a first oil passage 60 on an upper portion of the cylindrical portion 14b and a second oil passage 70 on the spring seat 15.