D1105 NO POWER

[pwr1]

Hi All, hope someone can help.
I've rebuilt a D1105 3cyl in a kubota excavator u25-3a. It came in with a badly cracked head and scored bores. It's been stripped to a bare block for the engine builders to re-bore. Now it's all back together it has no power. It's not great to start, runs rough at low idle, will rev to 2500 but the engines throttle is response is poor. If you apply a load via the hydraulics it doesn't appear that the governor is working. If at 2500 rpm when the load is applied it will eventually pull down to low idle.
The engine doesn't smoke at any point, it was recommended that I try the max fuel screw and still it doesn't smoke. Injector pump and injectors replaced/serviced.
The dealer says that the engine number doesn't match the machine and can't get parts/invo.
Genuine kubota manual is pretty vague!
Does anyone know the factory settings for the screws that set the injector pump linkages?? There not I the kunota manual and the dealer says they can't find out as the engine isn't the original.
Any help would be appreciated. Thanks

 

[#40Fan]

It sounds like injection pump timing is off, to me.

I'm sure to get more help specific to the engine you have, you'll need to provide an engine serial number.

 

[85Hokie]

Have you run a compression test on all cylinders?

Was anything changed via the injection pump? Shims added or removed?

 

[North Idaho Wolfman]

Hi All, hope someone can help.
I've rebuilt a D1105 3cyl in a kubota excavator u25-3a. It came in with a badly cracked head and scored bores. It's been stripped to a bare block for the engine builders to re-bore. Now it's all back together it has no power. It's not great to start, runs rough at low idle, will rev to 2500 but the engines throttle is response is poor. If you apply a load via the hydraulics it doesn't appear that the governor is working. If at 2500 rpm when the load is applied it will eventually pull down to low idle.
The engine doesn't smoke at any point, it was recommended that I try the max fuel screw and still it doesn't smoke. Injector pump and injectors replaced/serviced.
The dealer says that the engine number doesn't match the machine and can't get parts/invo.
Genuine kubota manual is pretty vague!
Does anyone know the factory settings for the screws that set the injector pump linkages?? There not I the kunota manual and the dealer says they can't find out as the engine isn't the original.
Any help would be appreciated. Thanks

First whoever suggested that you mess with the fuel screws did you no favors!
Really bad suggestion!
No kubota manual can tell you how to adjust those screws as it's a 100% factory setting that never changes.
Hopefully you didn't move all of them and you can guess where to put them back to where they were.

Now:
Did the engine rebuilders rebuild it, or did you? That will lead to a bunch more questions based on the answer!
Did they take anything off the deck (top of block, gasket surface) when they cleaned it up and rebored it?
Was a OEM head gasket used?
Did it get new oversized pistons and rings?
When the Injection pump was pulled were all the shims pulled off the pump then reused on the new pump?
Did the engine get checked for proper clearance of the pistons, as a cracked head is very common to bend rods?
Have you done a compression test?
What is the exact model and serial number on the engine? FYI: Those 2 things are stamped onto the block not cast into it.