Re: 833 detroit lubricator trouble shooting
Posted by HH56 On 2017/5/11 12:38:05
I am curious how much stroke there is between the old and new pumps or were they the same. Since you mentioned changing the arm I am wondering if there are other differences.
If the drawings in the 833 parts and owners manuals are reasonably accurate, where they show the top of the casting in the center of the spring below the diaphragm and the amount of space available under the arm before it hits bottom would seem to indicate that the original pump is very limited in diaphragm movement. If that is the case I would think the volume out would be rather small. If the replacement pump is sending appreciably more fuel directly to the carb, perhaps it is a combination of volume and pressure.
Attach file:
(85.31 KB)
If the drawings in the 833 parts and owners manuals are reasonably accurate, where they show the top of the casting in the center of the spring below the diaphragm and the amount of space available under the arm before it hits bottom would seem to indicate that the original pump is very limited in diaphragm movement. If that is the case I would think the volume out would be rather small. If the replacement pump is sending appreciably more fuel directly to the carb, perhaps it is a combination of volume and pressure.
Attach file:
(85.31 KB)
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=191508