This video shows the flow of an NLGI 1 grade grease in an operating MOV Limitorque operator, as shown through a videoscope inserted into the gearbox through a removed top plug. The flow is alternated from forward to backward cycles, and the flow direction can be seen to change. The video demonstrates the ability to target a specific location relative to the plug access point, that will be representative of the grease flowing to the lubricated components.
 
Access this 3-minute, 7-second video by clicking on the link below.