Yanmar 3TNE82A

Cdogg · Jul 4, 2019

This is a diesel motor on my generator. I changed my fuel feed pump and loss 1-2 ounces of oil out of fuel injection pump. I have looked for the drain plug on the pump and don't see it, figuring I will drain the rest and put some new oil in. I think I see the fill hole on the top of the pump left side? I have looked for information on line and didn't fine anything. Tomorrow I will call Hoye in Texas if I can't figure it out. I spoke to them last week about a little yanmar tractor, very knowledgeable, I am hoping pumpguy sees this too. He knows his stuff. Would love to post pictures but I'm still trying to figure that one out too.
Thanks

thepumpguysc · Jul 5, 2019

There is no drain on that pump BECAUSE, u cant put to much in.. it has oil level holes in the front brg plate..
The excess will drain into the engine..
Have a look at the back plate on the governor.. is it lower than the supply pump??
U might get a smidge more out thru the back cover.. or use a baster bulb..??

4get gto · Jul 5, 2019

thepumpguysc said:
There is no drain on that pump BECAUSE, u cant put to much in.. it has oil level holes in the front brg plate..
The excess will drain into the engine..
Have a look at the back plate on the governor.. is it lower than the supply pump??
U might get a smidge more out thru the back cover.. or use a baster bulb..??

So that mean you have to fill it too..?
Just curious..

Cdogg · Jul 5, 2019

So would I even have to fill it. If the pump oil flows out, wouldn't it flow in too?
I don't want to damage the injection pump over a ounce of oil. Thanks for answering

Cdogg · Jul 5, 2019

I think I have it figured out, there is a oil line from the block to the injection pump that refills the pumps as needed. In my opinion that is so cool.
Thank you!

thepumpguysc · Jul 6, 2019

Fill the pump thru the fill port on top of the gov. hsg. 5-8oz I think.. & wait 5 minutes before u start the engine..
That will give the oil time to seep thru the rear bearing onto the cam shaft..
U don't want to start that thing dry & HOPE that the engine fills it before u burn the bearing inside the pump..