Method of changing damping characteristics of twin-tube shock absorber

摘要

The present invention provides a method of optionally changing damping characteristics of a twin-tube shock absorber.;In the method of changing the damping characteristics of the twin-tube shock absorber (10), a threaded hole (11a) is formed in an outer tube (11), oil is drained from the inside of the twin-tube shock absorber (10) through the threaded hole (11a), replacement oil (35) is charged into the twin-tube shock absorber (10), and a check valve (20) is mounted in the threaded hole (11a). Thereafter, in a state that the check valve (20) is positioned on the upper side in the twin-tube shock absorber (10), a gas is sucked out from the inside of the twin-tube shock absorber (10) through a flow channel of the temporarily opened check valve (20), and a replacement nitrogen gas (36) is injected into the twin-tube shock absorber (10).