ac 7000 fuel pump
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=40035
Printed Date: 12 May 2025 at 6:29pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: ac 7000 fuel pump
Posted By: jtaub
Subject: ac 7000 fuel pump
Date Posted: 04 Nov 2011 at 7:27am
Neeeding help on how to turn the fuel up slightly on a 7000, i'm not looking to totally hot rod it just a little extra, thanks
-------------
If it doesn't fit, get a bigger hammer.
|
Replies:
Posted By: MACK
Date Posted: 04 Nov 2011 at 8:09am
|
Just behind the top cover is a screw that sets at a 45 degree angle to the top. Remove plastic cover, loosen lock nut and back screw out 1/4 turn at a time. MACK
|
Posted By: jtaub
Date Posted: 04 Nov 2011 at 9:03am
thanks, we've had this tractor for years, just thought it'd be nice to see if just a little more from it would help at times, thanks again
-------------
If it doesn't fit, get a bigger hammer.
|
Posted By: Hurst
Date Posted: 04 Nov 2011 at 11:16am
|
That's the HP (max fuel flow) screw, right? Isn't there also another one that limits the maximum amount of fuel per a plunger stroke or something like that (referred to as the torque screw, I'm guessing as it really pours some fuel to the tractor at the lower rpms)? I could've sworn there were two different screws on a RoosaMaster pump that controlled fuel flow.
Hurst
-------------
1979 Allis Chalmers 7000
5800 Hours
|
Posted By: injpumpEd
Date Posted: 04 Nov 2011 at 12:16pm
the external screw is the torque screw. It affects mostly rated speed fuel output. The actual fuel adjustment is inside, on the leaf spring(s), roller dimension. This is what actually determines pump output. You can back out the torque screw for more hp only if the roller dimension is set high enough. may gain 10-20hp. It will not lug as well when pulled below rated speed though, less torque rise.
-------------
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!
|
Posted By: MACK
Date Posted: 04 Nov 2011 at 8:22pm
|
Injpumped is right, won't be alot of HP but if it is a 4 roller pump don't adjust leaf springs unless you take the pump apart and measure each set of rollers. A 2 roller can be adjusted from out side with no problem. MACK
|
|