Grease Separation in Automated Lubrication System

Have any of you experienced grease seperation due to using too thick of a grease on an autolube system?

I have a customer that we supplied an automated lubrication system to. They have been using an NLGI 3 Grease. This is thicker than would normally be used in an auto lubrication syste. The system is a Trabon Series Progrogressive Divider valve system. They are getting seperation of the grease. They have changed the grease from another manufacturers type. Was using Petro-Canada Premium Synthetic Grease - Lithium Soap based thickeners NLGI 1, Now using SKF LGMT3 also Lithium Soap based thickeners. Thinking it is not a compatibility issue but the new grease is thicker.

The system has primary secondary and tertiary blocks. The appication is on an board edger in a sawmill and most points are not demanding on lubricant specification except for the Arbors which is what they are using the SKF grease for. The less critical points were getting the Premium Synthetic Grease.