I started on the Birfield repack today, but I was unable to get the Pre-load under the 12.6 Lbs that the manufacturer recomends(16lbs is the lowest I could get it). Could it be that the grease was too cold? BTW I'm using Amsoil Grease. It was about 30 degrees in Washington today. If that is the case, what should I set the pre-load at?Any ideas would be appreciated