Mitsu D3250 - what are these bolts for?

[Bartender]

Including an attachment - this is a picture of the diesel injection pump on a Mitsubishi D3250. What are the two bolts in the red circles? I think they look like adjustment bolts (I have no idea what they would adjust), the owner thinks they're for bleeding the system.
Maybe they're for some other purpose. Please help us clear this up.

Reason I'm asking about this is cause the owner wants to replace the fuel filter, which sets in a glass bowl down low on the tractor. I opened the bowl, washed off the filter because we couldn't find a replacement, and made the mistake of reassembling the filter assembly without filling the glass bowl with fuel. The tractor sucked air and wouldn't start. I cracked the fuel lines at the injectors to clear the lines. We cranked it til fuel blew out past the loosened fittings. It still took quite a bit for the tractor to stutter to life after tightening the fittings. Is there a better way to bleed these tractors?

Thanks!

 

[BillRodgers]

The owner is correct. Those are bleed screws. If you need a fuel filter contact us, satohparts.com. Or call 1-800-609-5110. Bill

 

[Bartender]

Good morning!
Well, it's a good thing I didn't make a bet. Thanks for clearing that up. I think the owner is already doing business with you. I saw a receipt for oil filters from a shop with a Roanoke address yesterday.

The fuel filter is a real odd ball. Nobody carries anything like it in this area. I'm sure he'll be contacting you.

Thanks again!

 

[Bartender]

OK, next question - can anyone help us with a procedure for bleeding the fuel system after dropping the glass bowl, replacing the fuel filter, and re-assembling?
Some guys at the place where I work said to fill the glass bowl with diesel before assembly and that makes sense, but some air's going to get in there anyway.
If this has been covered before, a link wold be super.

Does anyone know of an Owner's Manual (not a Shop Manual) for this type of tractor or its nearest U.S. market cousin?

 

[lens12]

Work from the fuel tank to the engine, opening bleed screws till only fuel comes out. Bleed screws on fuel bowl assembly & injector pump. I can supply you with mnuals for the closest US model.