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7020 wont start without priming fuel pump
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Leon B MO View Drop Down
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Joined: 12 Sep 2009
Location: Old Monroe, Mo
Points: 2206 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Leon B MO Quote  Post ReplyReply Direct Link To This Post Topic: 7020 wont start without priming fuel pump
    Posted: 22 Jun 2015 at 12:05pm
It runs fine but 10 after it is turned off it has to be primed with the hand pump to get it started. I assume it is the fuel line but wondering if there is something else to look for.
Thanks
Leon B
Uncle always said "Fill the back of the shovel and the front will take care of itself".
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Jwmac7060 View Drop Down
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Joined: 04 Jan 2014
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Points: 929 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jwmac7060 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2015 at 2:44pm
Is your primer plunger good?...I've seen them leak of there before
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timr View Drop Down
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Points: 73 		Post Options Post Options   Thanks (0) Thanks(0)   Quote timr Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2015 at 8:25pm
Are your bleeder valves tight? Injector lines tight? Our's would lose prime after a week but not that quick.
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LB0442 View Drop Down
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Joined: 27 Dec 2014
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Points: 767 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LB0442 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2015 at 8:46pm
I have a maroon belly 7060 and it started to have a long crank time after setting, sometimes as little as 3-4 hours after shut down.  It was really bad when it would get down to 1/4 or 1/2 tank.  I rebuilt the primer pump, parts from injpumped, works perfect now.
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victoryallis View Drop Down
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Points: 2879 		Post Options Post Options   Thanks (0) Thanks(0)   Quote victoryallis Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2015 at 9:09pm
Try changing the rubber fuel hoses they will get tiny cracks and let air in.
8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760
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MACK View Drop Down
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If I read it right that it will not start after being shut off for 10 minutes, check the fuel cap. If it looses prime that quick, the tank has a vacuum. Also there is two check valves in primer pump. If some trash gets in one of them it will loose prime.  MACK
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Leon B MO View Drop Down
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Points: 2206 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Leon B MO Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jun 2015 at 5:59am
It was supposed to say 10 seconds. It will not start only 10 seconds after shut down without priming hand pump. Thanks for the replies, I am going to replace primer pump regaurdless it leaks when I pump it. I will look into it after I get my starter back. 
Leon B
Uncle always said "Fill the back of the shovel and the front will take care of itself".
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MACK View Drop Down
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If it don't start after 10 seconds, you have a different problem. Either delivery valve is not seating or pump head is worn out.    MACK
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Leon B MO View Drop Down
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Points: 2206 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Leon B MO Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jun 2015 at 12:14pm
Thanks Mack
Sounds like something for the professionals. I know very little about injection pumps.
Leon B
Uncle always said "Fill the back of the shovel and the front will take care of itself".
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injpumpEd View Drop Down
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Points: 5146 		Post Options Post Options   Thanks (0) Thanks(0)   Quote injpumpEd Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jun 2015 at 1:42pm
so it will actually start by pumping the primer? If it does, then the injection pump should not be the main culprit. It may be tired, have worn transfer pump liner and blades, but if it will actually restart immediately after shut off, then it's a plumbing/supply issue. Once running, it runs just fine? or erratic governing? low power?
210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Leon B MO View Drop Down
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Runs smooth, power ok, exhaust is darker than I like but runs fine after starting. I've only had this tractor for about a year so I don't know any history.
Leon B
Uncle always said "Fill the back of the shovel and the front will take care of itself".
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Mike NEIN View Drop Down
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Points: 405 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike NEIN Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jun 2015 at 8:07pm
My 220 did the exact same thing and the fuel filter would be empty, I took the line off and blew air back into the tank and it's fine now. Still don't have a clue how it could run and not lose power when the filter wasn't full.????
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ILGLEANER View Drop Down
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Joined: 13 Sep 2009
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Points: 6448 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ILGLEANER Quote  Post ReplyReply Direct Link To This Post Posted: 24 Jun 2015 at 12:14am
Originally posted by Mike NEIN Mike NEIN wrote:

My 220 did the exact same thing and the fuel filter would be empty, I took the line off and blew air back into the tank and it's fine now. Still don't have a clue how it could run and not lose power when the filter wasn't full.????

I have a 3208 Cat that way Mike,my fuel filter is never full.
   IG

Edited by ILGLEANER - 24 Jun 2015 at 7:16am
Education doesn't make you smart, it makes you educated.
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