Posted for "Gerard O Connell" <goconnell@dodo.com.au>:

 Thanks guys for your tips, will get on to it this week!
 
 Ian, do you reckon replacing the sequencing valve might do the trick. I have
already had the seals replaced in this unit, however I guess this doesn't fix
a problem with the valve itself?
 
 Have you had this problem yourself?
 
 Regards
 
 Gerard