816 fuel in oil
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=197303
Printed Date: 23 Nov 2024 at 1:25pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 816 fuel in oil
Posted By: Orange4ever
Subject: 816 fuel in oil
Date Posted: 21 Sep 2023 at 4:45pm
Family 816 backhoe had gotten oil in the fuel some time ago and now it’s time to fix it. After looking through the book I’ve decided the most likely culprit is the fuel pump diaphragm has eroded and dumped fuel into the block, although it could be the injector pump(worst case scenario$$$). My question is does anyone have a source for a new diaphragm? I’ve got the part numbers from the book but haven’t found anything yet.
-------------
If you want a man to be a successful farmer, give him a Allis Chalmers tractor. If you want him to be a successful mechanic, give him a John Deere
|
Replies:
Posted By: Coke-in-MN
Date Posted: 21 Sep 2023 at 9:52pm
Found replacing the pump was easier than finding the diaphragm - seems with age it's a common problem for pump to leak internally and the bio-fuel seems to have hastened failure
-------------
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
|
Posted By: orangeman
Date Posted: 23 Sep 2023 at 8:37am
|
Clarke Power Solutions is the U.S. vendor for Perkins Engines - see link here: https://clarkepoweredsolutions.com/" rel="nofollow - https://clarkepoweredsolutions.com/
HTH's ~ Orangeman
|
Posted By: orangeman
Date Posted: 23 Sep 2023 at 8:39am
|
I have a new OEM fuel pump for the Perkins 4-236. I would guess not much difference between the fuel pump for the Perkins 4-248 but uncertain on that. If you need the P/N kindly let me know and can dig it out. ~ Orangeman
|
Posted By: Eric B
Date Posted: 23 Sep 2023 at 4:25pm
You can do a little test that won't really cost you anything. Just disconnect the (primary) supply pump and bypass it. The machine will run fine on gravity feed. If the problem still persists you'll know it's from the injector pump. I used to run my 816's on gravity feed on an ongoing basis, in fact they had smoother idling this way too. Just be sure you have lots of fuel in the tank if you're facing a sharp uphill slope with the front end.
-------------
Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal!
|
Posted By: Orange4ever
Date Posted: 23 Sep 2023 at 11:15pm
Thanks for the replies, found one online and ordered it. Took off the old one today and confirmed the diaphragm was bad. Should have it put together by next week and hopefully no other problems pop up. This backhoe has been in my family since the 80s.
-------------
If you want a man to be a successful farmer, give him a Allis Chalmers tractor. If you want him to be a successful mechanic, give him a John Deere
|
|