Pic. 5.44. Bypass valve removal
Unscrew the bypass valve and remove the gasket (pic. 5.44).
Pic. 5.45. Bypass valve check
Flush the valve with working fluid and check for leakage. To do this, close the bottom hole and blow compressed air 392–490 kPa into the opposite hole. Make sure air is not escaping from the hole at the end of the valve. If there is a leak, replace the bypass valve (pic. 5.45).