B2710 no oil pressure at startup

mpyinhsv · Aug 30, 2001

I have a 1999 Kubota B2710. The oil pressure light comes on and stays on up to 5 seconds when the tractor is first started in the morning or after it has sat for an extended period of time. Once the tractor has been started, I can restart the tractor and the light goes off immediately.

I currently have 210 hours on my tractor. The problem started when the tractor had 150 hours on it. The dealer changed the oil filter at the 150 hour mark with no change. I changed the oil and filter at the 210 hour mark, the tractor had not been running all day when I changed the oil. The oil filter was completely EMPTY, maybe a drop or two.

Not having oil pressure at startup does not correspond to long life in any engine much less a diesel engine.

My question is: does the oil filter have a valve that holds the oil in the filter when the tractor is not running or is this mechanism somewhere within the tractor itself?

Thanks
mpy

Anonymous Poster · Aug 30, 2001

The anti-drain back valve is in the filter itself on all the spin-on filters I've seen.

Bird · Aug 31, 2001

mpy, I don't have any answers, but my oil light certainly does not stay on when I start the engine. If it were me, I'd sure be talking to the dealer about it.

Bird

RichNJ · Aug 31, 2001

All oil filters that I have seen have anti-drai back valves. Did you use a Kubota filter? I would replace the filter.

mpyinhsv · Aug 31, 2001

I am currently working with the dealer. He replaced the oil filter at 150 hour mark when I first started having the trouble. That did not fix it. When I changed the oil at the 200 hour mark, I changed the filter but I have not had the time to crank the tractor to see if that fixed the problem.

I thought that maybe these models had some sort of valve within the tractor itself, instead of the filter, that held the oil in the filter.

mpy

Pks · Aug 31, 2001

Consider the chance that the pressure sensor has changed it sensing threshold or maybe the electrical relay (if equipped with one) has changed.

Peter

RMulkey · Aug 31, 2001

I suggest you check it with a mechanical guage at lease once. They are cheap and available from most auto parts stores. My first guess is the sender may be going bad or changing the way it respondeds. The mechanical guage will answer with the real oil pressure.

StanInCalif · Aug 31, 2001

The fact that the filter was empty is not necessarily a problem. The anti- drainback valve is on the inlet (dirty side) only, and oil can still pass through the filtering medium with the engine off, and out the outlet side.
The anti- drainback valve can usually be seen through the inlet holes- about 1/4 inch below the holes, there should be rubber (sometimes steel). If you can see into the filter, I would say there is no valve. Or you could fill the filter with water, plug the outlet hole, and turn it upside down and see what happens. But I would definitely check out the sender, as the others have mentioned. -Stan