Valve assemblies are provided in a track tensioning system or in other applications. The valve assemblies allow pressurized fluid (grease or hydraulic fluid from a power machine) to be introduced or evacuated from the same port. The valve assemblies use either a single check ball or poppet configuration, or a dual check ball or poppet configuration which are moveable from a first configuration, in which fluid is blocked in one direction while allowing flow in the other direction, to a second configuration where the reverse is true. A track tensioning element includes piston retaining features which retain a piston within a track tensioning cylinder tube. A track tensioning element can also include a no-pre-load spring positioned in-line with the tensioning cylinder. Disclosed track tensioning systems and track tensioning elements can, in various embodiments, utilize any combination of all or some of the disclosed features.
TRACK TENSIONER
KETTENSPANNVORRICHTUNG
TENDEUR DE CHENILLE
2018-03-07
Patent
Electronic Resource
English