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John, Poppers run 10 to 15psi. From memory, a NewGen spec is 25 to 30. A popper turns around 1000 rpm and you're turning -- 2500 to 3000 max? Big oil galleys and plenty of flow or velocity reduce pressure -- Bernoulli's law and all that. Should be OK. Also, you might be runnig some 10-30W or thin break in oil to seat the rings -which makes a difference in pressure readings. If the manual says you're low, there's probably a way to turn up the wick on the pump. The manual should show you how. Torque. How accurate is your torque wrench? Head torque spec I remember for my NewGen tractor is 110 ft/lbs. Years ago I got crazy and bought a Snap On mucho dinero dial torque wrench. Best they spec'ed it at was + or - 2%. If you pulled 115 out of a manual and then turned it up to 125, that's an ~8% differential. Could fall within the acceptable tolerance of a click type or old floating indicator type torque wrench. Double check your service manual on the pressure. If you rebuilt without a manual, I admire your bravery and native intelligence. There are one or two guys on here who turn wrenches at JD dealers for a living, so you'll probably get an exact number showing up in a day or two. Meantime, I don't think you're in too bad a shape.
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