To inject the hydraulic oil free from the mixed air, to a casing while minimizing the man-hour for processing the casing of a hydraulic coupling device H.
The hydraulic oil is injected into the casing through a through hole 35a of a rotor shaft R from an injection plug 85 of a hydraulic oil injection jig J2 mounted on a shaft end of the rotor shaft 35R projecting from the casing, while applying a vacuum by connecting a first suction plug 71 mounted on the casing of the hydraulic coupling device H to a vacuum pump 72. Whereby not only the hydraulic oil can be quickly injected without allowing the air to remain in the casing, but also the man-hour for processing the casing can be reduced by dispensing with a hydraulic oil injection port exclusively formed on the casing by injecting the hydraulic oil from the through hole 35a of the rotor shaft 35R.
NAKANE YASUTO
KUROKAWA TAKUYA
Kazuaki Niki
Next Patent: CHANGE GEAR FOR VEHICLE ADAPTED FOR SWITCHING TO MANUAL GEAR CHANGING DURING BRAKING OPERATION