DPA pump question

[Doc Larry]

I have a 2424 with a DPA injector pump. Been running fine, but sudden no start condition. Replaced and bled fuel filter. I have fuel to the pump, but only a hint of fuel out of the lower bleeder on the pump body, and nothing out of the upper bleeder. My parts book shows a small filter inside the pump inlet 3 043 084 R1. Is this a likely culprit, and is it serviceable, or replace only? In other words, is is a screen??

Thanks!

 

[Dieseltech]

CAV DPA pumps do have an inlet safety screen, but there should be NOTHING blocking it if fuel is filtered properly. The lower bleed screw is most important, top cover can be bled after engine is running. Did you use NAPA/WIX filter by chance? And did you make the common mistake of putting an O ring in the filter TOP OUTER groove? That MUST remain open as it's the fuel inlet on those filters.

 

[Doc Larry]

(quoted from post at 13:02:23 09/24/19) CAV DPA pumps do have an inlet safety screen, but there should be NOTHING blocking it if fuel is filtered properly. The lower bleed screw is most important, top cover can be bled after engine is running. Did you use NAPA/WIX filter by chance? And did you make the common mistake of putting an O ring in the filter TOP OUTER groove? That MUST remain open as it's the fuel inlet on those filters.
<img src="https://www.yesterdaystractors.com/cvphotos/cvphoto37401.jpg">

No, I used a Baldwin filter to replace a Baldwin filter that has been working ok. Fuel barely comes out the bottom bleeder. The non-start problem preceded the fuel filter change.....thanks.

 

[Doc Larry]

This won't let me edit, but I'll add my filter setup and filter are different than what you have pictured. At any rate, I have ample fuel at the pump inlet line/

 

[jim ball]

wow. i never knew that about napa 3166. are cav filters more screw up proof ? i just did a two 3166 & dont like them. am gonna upgrade to
spin on in a month. the line on secondary filter to cyl # 1 (front) has to be removed to life bolt to put on top o-ring. pia. mb will re
plumb but i want spin on with h20 drain. are you saying that the lower bleed on inj pump body is the most important ? makes it easier cus i
bled both at once & makes a mess.

 

[Doc Larry]

I did get the filter out, and it was not clogged. I will pull the cover off the transfer pump later today and see what else might be the problem.