DieselTalk

DieselEngineTrader's FREE Diesel Engine Forums

new topic search Categories login View Detroit Engines

CATEGORY LISTINGS > DETROIT > bull gear [ REFRESH ]
Thread Title:

bull gear


Created On Monday June 02, 2014 15:09 Diesel Talk
Diesel Talk Forum

littlejohn
Diesel Talk Forum
Posts: 85
Joined: Feb 2011

Note Monday June 02, 2014 15:09 View users profile View thread in raw text format
Diesel Talk
my truck has almost 2 million miles, so when do you need to do the bull gear is it by age, milage, noise, or it there a test you can do?
and can a bull gear be done by a back yard kind of a guy or this need to be done in shop? is there any special kind of tools I need ?
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

egantrucking
Diesel Talk Forum
Posts: 381
Joined: Dec 2007

Note Tuesday June 03, 2014 14:05 View thread in raw text format
Diesel Talk
2 million :-o

Has she been overhauled? What else have you done to it? Injectors? how long have you owned it? if you don't mind sharing....

I posted my experience on replacing the bullgear. I am by no means an experienced mechanic, but I have been working on motors since I was a child. There are some other people that posted about replacing the bull gear which was great help to me! You do need a few tools, but you can get by without any expensive stuff.

You need to take off an inspection plate and use a pry bar to check for play. Be gentle but firm. Flex is ok but not play. The bearing is just like a wheel bearing. Two tapered bearings. If you know what those should and should not feel like. Bar the engine over (rotate it) and check for play in different positions. The race could be failing in only one spot, to start. Examine the teeth. Any metal on the magnetic drain plug? Do you do oil samples?

I would think it has already been replaced from what I hear people say about them. 2 million would be a lot if it's original.

-------------------------
michael egan
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

egantrucking
Diesel Talk Forum
Posts: 381
Joined: Dec 2007

Note Tuesday June 03, 2014 14:07 View thread in raw text format
Diesel Talk
I don't see how to search on here, or I would bump my old post, to if it would help you.

-------------------------
michael egan
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

beachguy
Diesel Talk Forum
Posts: 33
Joined: Sep 2008

Note Thursday June 05, 2014 08:46 View thread in raw text format
Diesel Talk
What would you look for in oil sample regarding bull gear?

Edited: Thursday June 05, 2014 at 08:51 by beachguy
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

ponway
Diesel Talk Forum
Posts: 154
Joined: Nov 2009

Note Thursday June 05, 2014 20:54 View thread in raw text format
Diesel Talk


<< I don't see how to search on here, or I would bump my old post, to if it would help you. >>



Egan, is this the one your thinking of? http://www.dieselenginetrader.com/diesel_talk/messageview.cfm?catid=9&threadid=4162

And here is my limited experience with the bullgear, I am not a trained Detroit tech, just a owner.operator who does all his own work. Over 400,000 mi on this job and doing fine. About half way down, you may find some useful info in my update. Good luck and do buy a manual!

http://www.dieselenginetrader.com/EngineTraders/diesel_talk/messageview.cfm?catid=9&threadid=4277
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

heavyhaulerss
Diesel Talk Forum
Posts: 234
Joined: Mar 2010

Note Thursday June 05, 2014 23:11 View users profile View thread in raw text format
Diesel Talk
I don't see how the truck went to almost 2 mil with the original bull gear, with out some prior work.

-------------------------
HEAVYHAULERSS
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

egantrucking
Diesel Talk Forum
Posts: 381
Joined: Dec 2007

Note Sunday June 08, 2014 19:57 View thread in raw text format
Diesel Talk
If the bearing was bad, I would expect the wear metal "iron" to be higher in an oil sample because the gears would not stay true when rotating. Just my guess.

I know for years, I would always have a few shinny pieces of glitter like metal on my magnetic oil plug, when I did oil changes. I just accepted it as normal. One oil change there was a lot of metal on the plug, that is when I looked for a problem and discovered that the bull gear bearing was bad. After a new rebuild bull gear, there is never any metal on the drain plug. Nothing. Perfectly clean.

I do not do regular oil samples. Just an occasional one from time to time.

-------------------------
michael egan
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

danofarming
Diesel Talk Forum
Posts: 13
Joined: Sep 2012

Note Thursday January 22, 2015 14:34 View thread in raw text format
Diesel Talk
Pull the Accessory drive on the right front of your engine. You will see the tooth edge of the Bull Gear, reach in with a large screwdriver and check the Bull Gear for forward to rearward movement. if it moves any at all it needs to be replaced. If no motion run it!
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
CATEGORY LISTINGS > DETROIT [ REFRESH ]
Diesel Sales
Young & Sons Inc.
Luoyang Diron Parts Trading Co.,Ltd
IESC CORP.
Advertize on Diesel Engine Trader

Customer Testimonials

Newsletter

Subscribe to our mailing list to get all the latest DET news.as well as daily or weekly notifications of new engines and spare parts listings.

'Your website is working well for me - This month I have shipped engines to Canada, South America and several in the USA. Thank You.'

Jim Williams, Diesel Power Train Co. Colbert, USA

'We've sold a number of engines via DieselEngineTrader.com - even some that we've had lying around for a few years! It's very useful in getting our inventory seen by a much larger market.'

Jackie Read, A J Diesels Ltd, Southampton, UK

'Although there are other sites on the internet, DieselEngineTrader.com shows the equipment details very well, is maintained in a professional way and has helped us to sell engines. Keep up the good work!'

Peter van Lelieveld, DELTA TRADING BV Holland