TRACTOR PARTS Allis Chalmers Case & David Brown Farmall & International Ferguson Ford & New Holland John Deere Massey Ferguson Massey Harris Minneapolis Moline Oliver & Cockshutt Kubota / Yanmar

TRACTOR MANUALS

Allis Chalmers	Case	Farmall IH	Ford 8N,9N,2N	Ford
Ferguson	John Deere	Massey Ferguson	Minn. Moline	Oliver

Discussion Forum

F12 fuel pump

Welcome Guest, Log in or Register

Author

Brian

06-11-2001 14:54:23

Report to Moderator

Finally got painting done and all new fuel lines on. now the problem is that the fuel pump is not pumping. It has a rebuild kit in it with a new diaphram and so on. I have great flow from the tank to the sediment bowl and into the first mica disc valve leading into the pump diaphram itself. now when I remove the dome shaped nut holding the spring for the mica valve disc on the pump side itself it will push gas out but as soon as i put it back on with the output fuel line off it wont even push gas out of the fitting....HELP!! Sorry if this is sort of rambling I'm trying to hurry and still make it to dinner before I get into REAL trouble (HEHE)~Brian

[Log in to Reply] [No Email]

MikeH-Tx

06-12-2001 05:25:39

Report to Moderator

Re: F12 fuel pump in reply to Brian, 06-11-2001 14:54:23

First, disconnect the outlet line from the pump and crank a few times to make sure the pump is not working. Could be a plugged line between the pump and carb.

Assuming the pump is really not working, first try interchanging the two springs that sit above the valves (washers). I found these springs to be pretty finicky and had to adjust the tension on the valves to make everything work right (by stretching one spring). One more suggestion: While you are working on the fuel pump, use some clear plastic tubing on the output side of the pump so you can see if it is working or not and able to pump up to the height of the carb. I just use a length that goes up over the hood and down to a bucket on the other side.

[Log in to Reply] [No Email]

F14

06-11-2001 16:05:07

Report to Moderator

Re: F12 fuel pump in reply to Brian, 06-11-2001 14:54:23

Sounds like either the outlet fitting is plugged or the diaphram has a hole or is not seated properly, and it's leaking by when there's any backpressure on the outlet side.

I'm trying to picture in my mind where the gas would go if it's leaking through the diaphram. I'm thinking into the crankcase, but I'm not sure about that.

[Log in to Reply] [No Email]

[Options] [Printer Friendly] [Posting Help] [Return to Forum] [Log in to Reply]

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home | Forums

Copyright © 1997-2023 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy