I'm not sure that I fully understand your question, so I'll answer both of the questions that I think that you are asking. For doing "adjust actuals".....Normally, if a team member needs a change, they just resubmit their timesheet with the changes. However, if you as the project manager go into "Adjust Actuals" in the Resource Center and make changes, then you should click the "Update Actuals" button. That will send the changed time back to the project managers just as though that person had sent the changes. The project managers just apply the adjusted time like they would regular time.
However, if you are asking if there is a way for you to force a resynch of actuals from Project Web Access back into the project, you can go into the project plan and do Tools, Tracking, "Synch to Protected Actuals".