I have a JD 970 that recently had the low oil pressure light come on will idling, if you rev it up the light goes off. I put a guage on it and it had just a couple of pounds of oil pressure at an idle. I was wondering if anyone has had this problem before or if anyone has had to adjust the oil pressure regulating valve before. My tech manual keeps refering me to manual CTM-3 but I have had problems finding it. Any help would be greatly appreciated.