I have a T200 with a Deutz BF4M1011F with about 4500 hrs. I have run it for about 300 hrs. Before I bought it, I had the compression tested with 2 good cylinders, a passable cylinder and a low cylinder. The biggest deficiency was the range of compressions, which was on the limit of acceptability. By the time the timing belt was replaced, the engine started and ran perfectly, with plenty of power. It fires right up, even if I jump the gun a little on the glow plugs. Sometimes I forget to watch the countdown, but it starts and runs perfectly. The only problem is oil pressure. At idle, engine ward, it's about 23 psi. At 3/4 throttle, it's 32-38 psi. Once, when the RPMs were very low, a low pressure code was set. I cleared it, and haven't had it come back. My plan is to wait for a while before rebuilding the bottom end. I figure that if the top end weren't in pretty good shape, it wouldn't start so well. I think that as long as I am not settling codes, it should be okay to run it, and I'm not doing any real damage. Does that sound right?
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Duetz's have an odd oiling system being oil cooled. Pretty sure oil pressure is adjustable on those by playing with the relief valve. Also the oil pump is external so other then you have to mess with the timing belt, those are easy to change. If it is bottom end, I wouldn't stick to much money into something I know has low compression.
Thank you, Bobcatdan. I don't do all my own work, and I have the machine at the shop now. We had the discussion about the oil pump. I am going to have the oil pump replaced, and the timing belt inspected. The recommended service interval on the timing belt is something like 3000 hours and five years. I am nowhere near the 3000 hours, but the timing belt was was replaced about 3 years ago. I also want to have them measure the oil pressure to an external gauge just to make sure it isn't the internal sender that's off.Duetz's have an odd oiling system being oil cooled. Pretty sure oil pressure is adjustable on those by playing with the relief valve. Also the oil pump is external so other then you have to mess with the timing belt, those are easy to change. If it is bottom end, I wouldn't stick to much money into something I know has low compression.
Well, I got the answer. Bobcatdan, you were right on. The machine has a new style dipstick. Before the shop replaced the oil pump, they removed the relief valve. I remember reading in another post that the plastic on old style dipsticks would disintegrate, and that's what happened here. A piece of the plastic got stuck in the relief valve. They cleaned up the regulator, put it back and the pressure increased to normal.Thank you, Bobcatdan. I don't do all my own work, and I have the machine at the shop now. We had the discussion about the oil pump. I am going to have the oil pump replaced, and the timing belt inspected. The recommended service interval on the timing belt is something like 3000 hours and five years. I am nowhere near the 3000 hours, but the timing belt was was replaced about 3 years ago. I also want to have them measure the oil pressure to an external gauge just to make sure it isn't the internal sender that's off.
Nice catch!Well, I got the answer. Bobcatdan, you were right on. The machine has a new style dipstick. Before the shop replaced the oil pump, they removed the relief valve. I remember reading in another post that the plastic on old style dipsticks would disintegrate, and that's what happened here. A piece of the plastic got stuck in the relief valve. They cleaned up the regulator, put it back and the pressure increased to normal.
