Thank you all again for your valuable suggestions and feedback.
This system is a part of plant fire protection, it's not on a fire truck.
We have nailed down the issue. Even though engine manual says governor maintains constant speed, it doesn't especially with change in the load condition...
Thank you guys for your reply. I will try to include response to everyone:
1. Fuel pump has been tested by 2 independent diesel engine companies and found to be ok. Believe they didn't tell how they check it. Probably it is bench testing. However, I haven't seen it this process, so I can't...
Hello all,
We have an old diesel engine built in 1975. It is rated for 285 HP @ 1750 RPM. The problem is, as soon as engine loaded with fire pump, it's rpm drops down. For some reason it is not maintaining constant rpm. It drops down to ~ 1300 rpm (per manufacturer spec, there will 8% of rpm...
