Consolidation Issue after purging Translation Balances

My company has  been consolidating results  in USD for over ten years and have never  purged the Translation Balances  . This resulted in  translation program  to run in excess of  19 hours for each  period consolidation.

So we tested the purge in a test envcironment ( cleared 67million trnaslated balances. ) This resulted in the  translation process  ( at PTD) toirun in less than two hours. 

However the Transfer to the consolidated ledger resulted is out of balance entries  affecting the Balance Sheet accounts . P& L accounts  are fine .

Does anyone have exact steps in  Translation  and  Transfer to Cnsolidation  Ledger. process.  WE have always used PTD tranalation and have never been out of Balance.