Sooner or later, an auxiliary hydraulic coupler will become faulty and need to be replaced. These fittings take a lot of abuse from hydraulic pressure and external elements. They are pretty easy to replace most of the time and can usually be done in a few minutes.
The skidsteer in this video is a 2019 Bobcat T595.
Female Auxiliary Hydraulic Coupler Part#7246802
Male Auxiliary Hydraulic Coupler
Part#7246799
