Abstract: A method and structure for retaining a tube in place relative to a surface of a device, such as a motor or pump, for fluid communication there-between. The tube retainer comprises a tube having a retention groove, disposed adjacent an open end thereof, and a holding clamp having a slot which is engageable with the retention groove. The holding clamp further comprises a bolt hole for receiving a threaded bolt for engaging a threaded bore in the device to attach the holding clamp thereto, thereby holding and retaining the tube relative to the surface of the device.

Abstract: A hydraulic system including a re-circulation flow loop including a hydraulic pump and an actuator in fluid communication via a high pressure feed line and a low pressure return line, the system further including an air separator in fluid communication with the low pressure line for removing air from hydraulic fluid flowing along said re-circulation loop.