B
MS5001M, Speedtronic Mark I, Cummins V8 Diesel and Twin Disc Torque Converter
One of our units is not accelerating passed 870RPM and we think it has something to do with our starting means. We having a Cummins V8 diesel and twin disc torque converter.
Upon each start the jaw engages and allows the turbine generator to accelerate to light off but at 870RPM the jaw disengages and the diesel goes into cool down. The turbine then doesn't accelerate. We also tried forcing the clutch closed during startup and still had the clutch disengage.
The diesel was first suspect but when we put a tachometer on it, the diesel supplied a constant 2500RPM to the torque converter which eliminates the possibility of a diesel problem. We then thought the torque converter may be sucking air or not supplying enough oil so we checked the foot valve and oil pressure from the charge pump (both found to be acceptable). We also changed out the charge pump and we had the same results.
We finally bit the bullet and removed the torque converter and sent it out for repair. The rep did not find anything mechanically wrong with the unit and replaced the seals and one worn bearing for the charge pump shaft. I am installing the refurbished torque converter today and will go for another test run but I am anticipating running into the same problem.
As a note I test ran the unit successfully to full speed no load and base load (4) times before the thanksgiving holiday. When the unit started up the following Monday we rain into this.
Anyone have similar issues?
One of our units is not accelerating passed 870RPM and we think it has something to do with our starting means. We having a Cummins V8 diesel and twin disc torque converter.
Upon each start the jaw engages and allows the turbine generator to accelerate to light off but at 870RPM the jaw disengages and the diesel goes into cool down. The turbine then doesn't accelerate. We also tried forcing the clutch closed during startup and still had the clutch disengage.
The diesel was first suspect but when we put a tachometer on it, the diesel supplied a constant 2500RPM to the torque converter which eliminates the possibility of a diesel problem. We then thought the torque converter may be sucking air or not supplying enough oil so we checked the foot valve and oil pressure from the charge pump (both found to be acceptable). We also changed out the charge pump and we had the same results.
We finally bit the bullet and removed the torque converter and sent it out for repair. The rep did not find anything mechanically wrong with the unit and replaced the seals and one worn bearing for the charge pump shaft. I am installing the refurbished torque converter today and will go for another test run but I am anticipating running into the same problem.
As a note I test ran the unit successfully to full speed no load and base load (4) times before the thanksgiving holiday. When the unit started up the following Monday we rain into this.
Anyone have similar issues?