allis 7000 series

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   What's every one running for a fuel transfer pump?  Originally had on a Holley pump found out to last only a couple of yrs.  I switched to a facet pump from Napa 4-7 psi.  I was very happy with it 5-6 yrs.  I thought i would try a new one as my filter was not keeping up with my run time.  Tractor runs great till fuel filter cant keep up and then dies.  i've tried new filters and even tool off fuel lines back to the tank to look for a obstacle covering the hole in the tank.  I'm running out of ideas is 4-7  psi enough?  The only other thing is I took off the steel fuel line from the top of the filter to the injection pump my nut seals have seen better days,  would that be enough for my transfer pump to not be able to keep up?  I don't see any visible leaks of fuel while running.

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nickia Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Sep 2009 Location: alden iowa Points: 801	Post Options Post Reply Quote nickia Report Post Thanks(0) Quote Reply Topic: allis 7000 series Posted: 06 Aug 2026 at 8:46pm
	What's every one running for a fuel transfer pump? Originally had on a Holley pump found out to last only a couple of yrs. I switched to a facet pump from Napa 4-7 psi. I was very happy with it 5-6 yrs. I thought i would try a new one as my filter was not keeping up with my run time. Tractor runs great till fuel filter cant keep up and then dies. i've tried new filters and even tool off fuel lines back to the tank to look for a obstacle covering the hole in the tank. I'm running out of ideas is 4-7 psi enough? The only other thing is I took off the steel fuel line from the top of the filter to the injection pump my nut seals have seen better days, would that be enough for my transfer pump to not be able to keep up? I don't see any visible leaks of fuel while running.

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DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 23482	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 06 Aug 2026 at 11:15pm
	Whatever pump you are using needs to be rated for more than 10 gallons per hour. Like maybe 20 or 30 GPH, but 10 MINIMUM. A 7080 would burn that much at full load. Pressure doesn't make flow. 4 to 7 PSI is plenty. Whatever pump you use must be of a commercial or industrial quality, made for many hrs and years of service life. That isn't a $50 pump. And you realize there were more 7000 series made without an electric pusher pump than with, right ?? When they went to two fuel filters (primary and secondary) is when the electric was added.

Alvin M Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 24 Jun 2018 Location: PA Points: 854	Post Options Post Reply Quote Alvin M Report Post Thanks(0) Quote Reply Posted: 07 Aug 2026 at 4:31am
	I use NAPA FE0539 they are near me used 12 worked great

AC7060IL Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 19 Aug 2012 Location: central IL Points: 3784	Post Options Post Reply Quote AC7060IL Report Post Thanks(0) Quote Reply Posted: 07 Aug 2026 at 1:32pm
	What’s your tractor’s fuel filter(s) specs? AGCO? Cat? Aftermarket? And what’s the fuel filter’s micron levels? 2? 5? 10? Diesel fuel is more viscous than gasoline type fuels. So it’s inherently slower flowing. On average a new clean fuel filter could produce 0.3-0.8 psi pressure drop? Likewise a dirty/clogged fuel filter might produce 1-3psi drop? And a 10 or lower micron secondary fuel filter for fine particles could produce another 0.3-0.5 psi drop? A pre-filter might have a 40,50,(dia of human hair) or higher micron element for larger fuel particles with little to no psi drop? Point is, it all adds up to slow fuel flow, which creates more drag on a fuel pump. Some people (truckers, etc) will install a fuel pressure gauge just after the fuel pump. Then they’ll know by the gauge’s readings when fuel filters are requiring servicing. Edited by AC7060IL - 07 Aug 2026 at 1:38pm