farmeracb
Member
This isn't a skid steer application, but thought you guys might see as many 3 cyl as any, so here goes.
The machine.
New Holland TN75DA tractor, Iveco 3 cylinder turbo diesel, Bosch VE Injection Pump all mechanical, 600 Hours on engine.
The problem.
65 hp tractor, only making 30 hp on dyno. My dyno, well calibrated, and tractor will not pull itself in road gear above 1800 rpm. Starts first revolution, hot or cold. sounds good, runs good, tastes good, smells good. No smoke.
History.
I removed injection pump for repair of the cold start advance housing which was cracked. Injection repair shop with big name repaired and resealed pump, set specs. Before this repair, there was no other symptom from the customer other than the fuel leak. He thought is used a little more fuel than he would like and the soot on the loader would agree. Pump shop found aneroid pin stuck, could have caused high smoke. Installed pump, ran fine. as soon as the weather got cold, customer called and said the tractor would not start. and it wouldn't. Checked everything over, pulled pump and injectors, and returned them to the shop. Got a pump back and a bill for a new rotary head and injector cleanup. Put everything back together, starts great, hot or cold, no power.
Testing and work done.
Had pump and injectors reworked multiple times (6) at 2 different shops, including a month long stay at the original diesel injection service shop and got the answer they couldn't fix it. I have run the tractor from an external clean fuel source with a regulated 10 psi electric supply pump. spec is 8 at wot. I have pressure checked the entire intake system, the only leak being from the draft tube (rings). I checked compression, 425 all 3 cylinders. I have run valves multiple times. I bought a new pump out of my pocket, pulled the timing cover and retimed with new pump from the crank up. I have adjusted the new pump until I am uncomfortable with the go screw with NO change, no smoke, no increase in manifold pressure (runs around 7psi at rated speed 30 hp) I have tried to trick the aneroid under load with 20 psi of shop air, with no change in power or smoke.
The bottom line.
Any ideas? My compression numbers and no smoke keep me hesitant to pull the cylinder head but got to try something. I am running out of ideas. And dollars.
Thanks, Adam
The machine.
New Holland TN75DA tractor, Iveco 3 cylinder turbo diesel, Bosch VE Injection Pump all mechanical, 600 Hours on engine.
The problem.
65 hp tractor, only making 30 hp on dyno. My dyno, well calibrated, and tractor will not pull itself in road gear above 1800 rpm. Starts first revolution, hot or cold. sounds good, runs good, tastes good, smells good. No smoke.
History.
I removed injection pump for repair of the cold start advance housing which was cracked. Injection repair shop with big name repaired and resealed pump, set specs. Before this repair, there was no other symptom from the customer other than the fuel leak. He thought is used a little more fuel than he would like and the soot on the loader would agree. Pump shop found aneroid pin stuck, could have caused high smoke. Installed pump, ran fine. as soon as the weather got cold, customer called and said the tractor would not start. and it wouldn't. Checked everything over, pulled pump and injectors, and returned them to the shop. Got a pump back and a bill for a new rotary head and injector cleanup. Put everything back together, starts great, hot or cold, no power.
Testing and work done.
Had pump and injectors reworked multiple times (6) at 2 different shops, including a month long stay at the original diesel injection service shop and got the answer they couldn't fix it. I have run the tractor from an external clean fuel source with a regulated 10 psi electric supply pump. spec is 8 at wot. I have pressure checked the entire intake system, the only leak being from the draft tube (rings). I checked compression, 425 all 3 cylinders. I have run valves multiple times. I bought a new pump out of my pocket, pulled the timing cover and retimed with new pump from the crank up. I have adjusted the new pump until I am uncomfortable with the go screw with NO change, no smoke, no increase in manifold pressure (runs around 7psi at rated speed 30 hp) I have tried to trick the aneroid under load with 20 psi of shop air, with no change in power or smoke.
The bottom line.
Any ideas? My compression numbers and no smoke keep me hesitant to pull the cylinder head but got to try something. I am running out of ideas. And dollars.
Thanks, Adam