Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

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

Tractor Talk Discussion Forum

For JoeBob/IN

Welcome Guest, Log in or Register
Author 
NC wayne

01-22-2007 18:10:07




Report to Moderator

Hey, I just read your response to my post last night concerning the injectors in your Detroit. Before you take them to a shop to be checked you can easily do a field check to check the spray pattern. It's something the guy that owns our local fuel shop showed me years ago and it works. Since a detroit injector is a unit style it does all the work of pumping/pressurizing the fuel as well as injecting it through the nozzle. It does this when the cam causes the rocker arm to push the spring loaded plunger down. That said you can easily duplicate this action with a hard rubber mallet. The easiest way to do it is to first make sure the injector body is full of fuel. If you just took it out of the engine it should be but it doesn't hurt to check. Now hold the injector in one hand, keeping the control rack pushed all the way in to a full fuel position. MAKE SURE THE INJECTOR IS FACING AWAY FROM YOU AND BE DANG SURE NOT TO HAVE ANY FINGER OR OTHER BODY PART IN FRONT OF THE NOZZLE SINCE THE FUEL IS INJECTED WITH ENOUGH FORCE TO INJECT IT THROUGH YOUR SKIN. (I know, common sense but "you never know sometimes"...LOL)Anyway, once things are pointed in a safe direction strike the head of the plunger with the mallet and you should be able to see the spray pattern. If you've ever seen an in ijector tested you'll sorta feel and hear a pop when you strike it which tells you it's building enough pressure to pop the internal check valve to allow it to spray. The spray pattern should look like small V shaped clouds squirting out from the holes in the nozzles. If you see any large drops, it doesn't "pop" when you strike it, or basically if it does anything but produce the V shaped mist then you definately need to take them to a shop. All your doing is basically the same thing the shop will do to check them except your not using a fancy machine and won't actually know what the popping pressure is. Usually though if the popping pressure is low enough to effect the injector/engine it'll show up in the spray pattern. Like I said last night I'm no "expert", all I am is an old school Mechanic that loves to read and learn and work most on anything that comes through the door, so if you have any questions just let me know and if I don't know the answer I probably know someone that does or can look them up.

[Log in to Reply]   [No Email]
JoeBob/IN

01-23-2007 05:47:30




Report to Moderator
 Re: For JoeBob/IN in reply to NC wayne, 01-22-2007 18:10:07  
Have another question for ya, how do you identify what engine these are. Can't find a tag anywhere and was told it is an 8v71 by one fella and an 8v92 by another.



[Log in to Reply]  [No Email]
JoeBob/IN

01-23-2007 04:48:17




Report to Moderator
 Re: For JoeBob/IN in reply to NC wayne, 01-22-2007 18:10:07  
Thanks for the reply. I figured there was a way to check them and even tried to get fuel to come out by pushing on the plunger but didn't get any. Didn't think to hit it with a hammer... duh! Anyways, I put them back in only I swaped them from side to side and made an attempt to adjust the rack. Still fires on the right side but now the left side seems to hit on one at idle and if I rev it for a few mins it will fire on all 8. Before you had to really rev it for about 5 mins to get the other 4 to hit. So it appears to not be the injectors but maybe low compression. It really blows the white smoke, I mean really bad unless you drive it around and get it to operating temp. How do you check the compression on these beasts? That is one big hole when the injector is out. I am in the search for a manual from E-bay so hopefully that will answer most of my questions. Oh, and after messing with the rack she seems to idle a bit better and definately has more response to the throttle.

[Log in to Reply]  [No Email]
NC wayne

01-23-2007 18:17:19




Report to Moderator
 Re: For JoeBob/IN in reply to JoeBob/IN, 01-23-2007 04:48:17  
If I remember right the serial number on the V engines, be they 71 or 92 series, is stamped on a flat pad on the front, right side of the engine block just under the edge of the head. Let me know what it says and I can tell you whether it's a 71 or 92 and should even be able to tell you approximately when it was built based on the serial number. As for checking compression Kentmoore makes an adapter that fills that big hole your talking about and drops it down to a standard air hose connection where you can hook a compression guage to it. Their pretty proud of them so if you know someone that might have one you'd be better off to borrow/rent one instead of buying it. If setting the rack on one side made a difference it sounds like it needs a full tuneup where you adjust the governor as well as the racks. If one was off you can almost bet everything is a little off. Not to mention if it has the throttle delay device that in itself takes special tools to set up so your talking even more money to be able to make it right. Still the manual for that engine will tell you step by what to do and in what order to do it. Thing is the manuals for a 92 and a 71 series engine are gonna be different so you'll need to know that for sure before getting a manual. Once you let me know on the numbers and I may have a manual for you. I sold several of them on ebay awhile back but I've still got some left. If I've got the one like you need left I'll make you a deal on it if you want. If you want you can contact me directly you can do it at Nota55Nomad@AOL.com I figure if nothing else it'll save hunting through all the back posts to see if there was a reply. Just let me kow on the serial number and maybe I'll have a book so you can the old girl up and running right. Take care, Wayne

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


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