Here is a bit of a workflow that may help:
1 Open the consultant model in appropriate version of Revit
2 Enable Worksharing (if it isn't already)
3 Save As ...
a) if this is the first “save” of the consultant model to Revit Server, use a generic name like link-Structural.rvt and save onto Revit Server in the appropriate folder (if you have one for links)
b) if this is an updated model, overwrite the existing consultant model, using current name in the Revit Server Link folder
4 Use Reload on this new Consultant model in Manage Links of Architectural (our) host model
5 Close the Shared Levels and Grids workset for the Consultant Model, like this:
6 Sync with Central. The Consultant model has now been imported / updated onto Revit Server, and other team members should be able to access it.
Help: Linking Server-Based Workshared Models
Other links and info:
This RFO post details what some firms are doing with Revit Server and links:
Revit Server & Linked Consultant Files
Revit Server Administrator 2013 displays "Server Error" upon loading the GUI
10 Things to Know About Revit Server - The Revit Clinic
Removing and Replacing Models on Revit Server - The Revit Clinic