Removal of quick couplings must be carried out in the following order.
Remove the latch (1 and 2, fig. 5.160) in the direction of the arrows and disconnect the hoses.
Check O-rings of circular cross-section (1, fig. 5.161), do not apply lubricant to facilitate sliding when installed. Rings must be clean and dry.
Installation of quick couplings should be carried out in the reverse order, while it is necessary to press the lock before installing them (1, see fig. 5.160) and push the hose up to the stop. The quick-release coupling should lock into place with a clearly audible sound - a click.