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

Shop Now

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

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

John Deere Tractors Discussion Forum
:

Exhaust gas pressure

Welcome Guest, Log in or Register
Author 
5020Chris

11-03-2004 09:34:48




Report to Moderator

Can any of you guys help ? We have a Cat backhoe at work that we are thinking of turboing to cure the smoke getting in the cab, I know this sounds strange but unless you have all the windows closed when travelling or even working the exhaust fumes just come right in the cab. We have replaced the pipe and silencer and all the joints are good with no leaks round the manifold either. Its just when looking at a friends 5020 with no turbo the exhaust gases just seem to float out the pipe like on the Cat but on my 6030 (with turbo) the exhaust gases seem to jet out when its revvin. Maybe this would get the fumes away from the cab ? The backhoe is a 98 model with 1800 hours on the clock and the engine is in good order.
Thanks for any advice.
Chris.

[Log in to Reply]   [No Email]
mowr

11-04-2004 18:27:05




Report to Moderator
 Re: Exhaust gas pressure in reply to 5020Chris, 11-03-2004 09:34:48  
Blowby from the breather tube is often the cause of combustion products migrating into the cab. If this is the case with your machine, turboing or anything else that increases back pressure will likely increase the amount of blowby.



[Log in to Reply]  [No Email]
txblu

11-05-2004 10:04:34




Report to Moderator
 Re: Exhaust gas pressure in reply to mowr, 11-04-2004 18:27:05  
If blowby is your problem, build your own PCV system. I connected a rubber garden hose from the breather tube to a hose barb I installed in the intake manifold. Just drilled and pipe tapped a hole; piece of cake. Solved the problem.

Mark



[Log in to Reply]  [No Email]
txblu

11-04-2004 07:32:52




Report to Moderator
 Re: Exhaust gas pressure in reply to 5020Chris, 11-03-2004 09:34:48  
If you reduce the size of the exhaust, you will force the velocity to increase and the engine will run smoother. I know you have to watch back pressure with a diesel, but you should be able to get it to shoot 3 to 4 feet above the cab with just a diameter change.

What diameter? I'd go to a dealership and look at new ones with the same size engine you have. That ought to give you an idea as to how small you might go without hurting performance. Should run quieter too (with a new reduced dia muffler).

The turbo route is tons of money and work and all.

MY2c

Mark

[Log in to Reply]  [No Email]
buickanddeere

11-04-2004 07:01:18




Report to Moderator
 Re: Exhaust gas pressure in reply to 5020Chris, 11-03-2004 09:34:48  
Get it repaired ASAP. The trace amounts of carbon monoxide in the exhaust is oderless and tasteless. It only takes a few parts per million to leave the operator "slugish" and slower thinking/reacting.



[Log in to Reply]  [No Email]
G-MAN

11-03-2004 10:09:27




Report to Moderator
 Re: Exhaust gas pressure in reply to 5020Chris, 11-03-2004 09:34:48  
What model of Cat TLB are we talking about here? I used to work on Cats including a lot of TLBs, and from what I remember of say something like a 416B, the engine is very well enclosed, so a hidden exhaust leak could lead to some exhaust getting in the cab. Having the doors all closed could allow enough pressure to build in the cab to keep any exhaust from seeping in. If you're sure there are no exhaust leaks (they can be very hard to find), going to the time and expense - a LOT of expense - to turbo the engine is probably not a viable option to cure this condition. A possible solution would be the installation of a taller stack to make the exhaust exit the pipe above cab level. You'd also be well advised to contact a Cat dealer or any local operators of similar machines and find out if they had the same problem and how they cured it.

[Log in to Reply]  [No Email]
5020Chris

11-04-2004 15:00:56




Report to Moderator
 Re: Exhaust gas pressure in reply to G-MAN, 11-03-2004 10:09:27  
The Cat backhoe is a 428C model. Its just the machines I used to operate for a previous employer also were 428C's but they were factory equipped with a turbo and you can certainly notice a difference in the flow of exhaust gases coming from the end of the pipe when its working. The end of the pipe is already about 6 inches taller than the cab roof. Thanks for any help.



[Log in to Reply]  [No Email]
G-MAN

11-04-2004 15:38:30




Report to Moderator
 Re: Exhaust gas pressure in reply to 5020Chris, 11-04-2004 15:00:56  
Like I said, I would contact the dealer and inquire if this is a known problem and what if any solutions they have. An engine has to breathe in effectively to breathe out effectively, so I'd also check the intake system and air filters for possible restrictions. I'd also still be looking for an exhaust leak under the hood. I can't image conditions dead calm enough for hot exhaust gases to be able to drop and enter the cab. Any amount of breeze or wind should prevent that, which would really lead me toward looking for an underhood leak that is allowing exhaust into the cab through the floor or firewall area.

[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