lewisHH

C-130j 

APU is Auto shutting off, RPMs not getting above 13-30, can't hear ignition popping off. Got fuel and oil pressure. Replaced tons of parts from the Exciter to the Fuel solenoid valve and Starter. No clue! 

On 6/9/2022 at 3:08 AM, Shaun said:

Found out the second one was a restricted oil line. Just need to figure out the first one.

Anything on the First issue, having same thing 

On 2/25/2019 at 11:41 PM, Shola said:

We replaced both the aux start relay and the fuel holding relay. We also replaced the centrifugal speed switch (110% overspeed switch). We heard the ignite firing. We even saw the spark before installing it back into the combustion chamber. During one of the attempts, the APU rpm rose to 32% and got stagnated. The combustion chamber was also hot indicating some combustion. However,  the APU couldn't self sustain its operations. We have replaced virtually every component from FCU to oil pump to atomizer. We are however not sure of the integrity of the ignite as we do not have a new one in store. We have placed order for new ignitors for further troubleshooting. Thank you all for your contribution. I think we all can learn one or two things from this experience after we might have succeeded. Meanwhile,  kindly keep your suggestions coming.

On 2/25/2019 at 11:41 PM, Shola said:

We replaced both the aux start relay and the fuel holding relay. We also replaced the centrifugal speed switch (110% overspeed switch). We heard the ignite firing. We even saw the spark before installing it back into the combustion chamber. During one of the attempts, the APU rpm rose to 32% and got stagnated. The combustion chamber was also hot indicating some combustion. However,  the APU couldn't self sustain its operations. We have replaced virtually every component from FCU to oil pump to atomizer. We are however not sure of the integrity of the ignite as we do not have a new one in store. We have placed order for new ignitors for further troubleshooting. Thank you all for your contribution. I think we all can learn one or two things from this experience after we might have succeeded. Meanwhile,  kindly keep your suggestions coming.

Any update on this , having same issue