180 and 215 pump barrel question

[ZEEEW]

Hello all



Just got the 215 motor put in the 98 auto truck, and a couple of the barrels are leaking at the pump. Seems that the people that pulled the 215 let it fall over, bending/cracking a couple barrels. Question is, are barrels off a 180 auto pump and the 215 pump the same? Both are numbered 255. I know the delivery valves are different.

Can we get away with pulling old barrels off 180 pump?



Thanks all



Eric

 

[Don M]

Those are the delivery valve holders and not the barrels. The barrels are inside the pump. The 180 pump DV holders will work just fine. Make dern sure everything is very clean. The DV holders require a special socket to install and the torque is critical. Some have washers as well that may need replacement. I coat the rubber washers on the DV holders with diesel or oil before installation to insure they dont get torn when installed.



Those DV holders are very tough material I cant believe that someone cracked one. They must have tried real hard.



Don~

 

[ZEEEW]

We just unbolted the whole thing, with the 2 bolts at the bottom.

Should we change only the holder, but not the whole thing?

Guess I should call it the correct part!

 

[Don M]

The two bolts are the actual barrel. The DV holder is what is screwed on the top of the barrel. The 255 is stamped on the DV holder for more reference. Unfortunantly the pump will have to be calibrated now. Once you pull a barrel the pump has lost calibration. It is very sensitive. I have bumped mine very slightly on the pump stand and changed the flow radically.



Don~

 

[Don M]

Oh, I forgot the plunger and barrel are finely lapped together as a set. They are NOT interchangable. At this point I would take the pump to the shop and have it reassembled and calibrated.



Don~

 

[Cummins Corvette]

Be very careful with the plunger/barrel assemblies. The clearance is around 30 millionths of an inch. That is . 03 thousandths or an inch. If the barrels don’t slide back over the plungers easily re-clean them. Do not force them at all. Don is right about it needing recalibration if you removed them. But *I* just recalibrated mine ghetto style and it seems to be working a bit better than before. It is now a lot smoother at idle. I just found out which cylinder was too strong by loosening the injector lines while it was running. I then rotated that barrel a little counter clockwise to decrease the amount of fuel being delivered by that plunger. It seemed to work quiet well. If you do this (at your own risk or coarse) make sure that the barrel nuts are good and tight before you start it back up again. I have been told that if one of the barrels is loose when you start it that it could seize up and ruin the pump. But it worked well for me; the truck seems to run better now. Maybe I was just lucky.

Chris

 

[ZEEEW]

Pump is going to the shop for calibration and new parts, thanks all. Best part is yard agreed to pay



Eric

 

[M Barnett]

The clearance is around 30 millionths of an inch. That is . 03 thousandths or an inch.

Chris! Have another cup of coffee. . 03 is thirty thousandths of an inch, not 30 millionths, . 03 is close to 1/32". If they are a tight lapp fit, its probably three tenths of a thousandths.

Michael