I'm a newbie here, so I appreciate your attention. I'm also new to diesels, so bless us I'm learning as fast as the synapses will fire. Finally finished the build to a gold dredge that is an hydraulic amphibious driven boat. I'll send a video if I can get the engine running right.
I've got a Kubota v3600 turbo, its based on the v3300 and has many/mostly interchangeable parts. It was a generator engine with variable throttle, bought it low-hours used. Full throttle was 1800rpms when I started adjustments. I need it to run at 2200rpms for my water pump to hit it's pressure/flow rate, but it's maxing out at 2060rpms, 2000rpms under load. Engine rpm curve in the manual is rated to 2600rpms. I've adjusted the the no-load max screw as far back as it will go. It still has a little bit of thread left, but the actual throttle handle reaches it's max, so I let that guide how far out the adjustment screw went. I attempted to adjust the #2 screw- the output limiting bolt, but after 2.5 full turns, nothing had changed in rpms/smoke both with and without load, so I put it back to where it's at. I was told I needed a different governor spring, but there is only one available for it from Kubota, there aren't different rated springs per rpm requirements.
It was then suggested that I need a different injection pump governor, which is something that has to be built by someone not me. I've read other forums that say something about a throttle stop screw, or an adjustment screw in the injection pump. The season up here in AK is winding down, and I'm really trying to find a solution that doesn't cost more time in shipping.
The emergency throttle stop lever had broken when I got the engine, so we had to take apart the governor assembly. The start spring (the long horizontal one in the picture), got stretched here, but I didn't mess with the main governor spring (the one at a 45degree angle). I say stretched, as in the "U" hook on the left got stretched. I bent it back, reinstalled, and it hasn't had any issues. I mention this by way of full disclosure, and not knowing what exactly is an important detail here.
Any hacks to get me another 200rpms? I really appreciate it, guys. Got a lot riding on this project. -Ian
I've got a Kubota v3600 turbo, its based on the v3300 and has many/mostly interchangeable parts. It was a generator engine with variable throttle, bought it low-hours used. Full throttle was 1800rpms when I started adjustments. I need it to run at 2200rpms for my water pump to hit it's pressure/flow rate, but it's maxing out at 2060rpms, 2000rpms under load. Engine rpm curve in the manual is rated to 2600rpms. I've adjusted the the no-load max screw as far back as it will go. It still has a little bit of thread left, but the actual throttle handle reaches it's max, so I let that guide how far out the adjustment screw went. I attempted to adjust the #2 screw- the output limiting bolt, but after 2.5 full turns, nothing had changed in rpms/smoke both with and without load, so I put it back to where it's at. I was told I needed a different governor spring, but there is only one available for it from Kubota, there aren't different rated springs per rpm requirements.
It was then suggested that I need a different injection pump governor, which is something that has to be built by someone not me. I've read other forums that say something about a throttle stop screw, or an adjustment screw in the injection pump. The season up here in AK is winding down, and I'm really trying to find a solution that doesn't cost more time in shipping.
The emergency throttle stop lever had broken when I got the engine, so we had to take apart the governor assembly. The start spring (the long horizontal one in the picture), got stretched here, but I didn't mess with the main governor spring (the one at a 45degree angle). I say stretched, as in the "U" hook on the left got stretched. I bent it back, reinstalled, and it hasn't had any issues. I mention this by way of full disclosure, and not knowing what exactly is an important detail here.
Any hacks to get me another 200rpms? I really appreciate it, guys. Got a lot riding on this project. -Ian
