Hello All,

My Cletrac AG does not have oil pressure for between 20-30 seconds after starting. It has the Hercules 4 cylinder Engine. Once it is up and running the oil pressure is fine. I was wondering if anybody seen this before. Is there a ball and spring/check valve in the housing which stops the oil draining back into the sump which may need sorting ???  As i seem to think it takes this time to re-fill the filter housing ?
also can anyone advise me on a replacement oil filter ?

 Thanks in advance,
Carl Hargreaves in the U.K 
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