440 Fuel Pump pushrod issues result in NO PUMP?

[Big John SFV]

Three times I've installed the new mechanical fuel pump in my customer's RV and it has no more fuel pressure than when I got it. Yes, the arm is installed UNDER the pushrod that I put a dab of grease on to hold it in place during installation. I have tried "priming" the line,using a 5 gal can two feet from the pump (didn't draw any fuel from it) because it's a fuel PUMP, not fuel SUCK and the tank is quite a distance away, filled the carb and fired it...NOTHING!! I did notice however, the pushrod doesn't seem to be moving very far. At least not far enough to make the pump work. Could the rod possibly be that worn? The eccentric be broken? I'm going to pull the rod tomorrow and check it. Any idea?

 

[turbine68rt]

How close is the rod length to 3.22"?

 

[pnora]

Are you sure the cam is turning? Possible broken timing chain or gear.

 

[PurpleBeeper]

Yeah, sounds like the pump isn’t moving

 

[turbine68rt]

He said he "filled the carb and fired it".
Didn't say how long it stayed running.

 

[Dutchrebuild]

Cam eccentric warn out on cam
Push rod to pump warn out
Fuel pump junk

 

[Daves69]

Have you checked for fuel restrictions in the line and sender before the pump?

 

[pnora]

He said he "filled the carb and fired it".
Didn't say how long it stayed running.

He said [[[filled the carb and fired it...NOTHING!!]]]] I guess you could read that two ways. So does fire it mean it cranked and no fuel pressure or does it mean it cranked and started with no fuel pressure. I guess if he said it started and ran that would eliminate the cam not turning.