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Perkind 4236 low oil pressure
Good old Perkins starts showing low pressure (<10PSI) after a couple of hours. So I replaced oil pump and took to it 0.30 (crankshaft) but problem remains. Any ideas? Refilling check valve? Is it the gauge?
Manuals show counter balances together and were dot alligned as indicated although that is counter intuitive because one could balance the other and have less vibration and less wear.