Ball bearing 4th main

Discuss all things Model T related.
Forum rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules

Topic author
Dan Hatch
Posts: 1463
Joined: Tue Jan 08, 2019 7:31 pm
First Name: Dan
Last Name: Hatch
Location: Alabama
MTFCA Number: 49974

Ball bearing 4th main

Post by Dan Hatch » Wed Aug 19, 2020 1:36 pm

Guys I need help. Engine with the ball bearing 4th main, type that you must turn down shaft leaking out bearing. Brand new double sealed bearing, new to trans driven plate turned to bearing ID with brake drum.
Oil is coming out the bearing not around it or by shaft.
Does anyone have a better bearing for this job?
Less than 2 hours on test stand started leaking.
If you do not want to post, email at address in pictures. Thanks Dan
04CDC19F-DEA6-4D82-913F-E04B0D6CCA90.jpeg
04CDC19F-DEA6-4D82-913F-E04B0D6CCA90.jpeg (50.1 KiB) Viewed 943 times


Les Schubert
Posts: 684
Joined: Thu Jan 10, 2019 5:47 pm
First Name: Les
Last Name: Schubert
Location: Calgary

Re: Ball bearing 4th main

Post by Les Schubert » Wed Aug 19, 2020 1:42 pm

You don’t say what brand of bearing. I’ve always used a non Chinese name brand like SKF or Fafnir or similar with no trouble.


Topic author
Dan Hatch
Posts: 1463
Joined: Tue Jan 08, 2019 7:31 pm
First Name: Dan
Last Name: Hatch
Location: Alabama
MTFCA Number: 49974

Re: Ball bearing 4th main

Post by Dan Hatch » Wed Aug 19, 2020 2:05 pm

All this one says is China.


Dan McEachern
Posts: 452
Joined: Sun Jan 06, 2019 11:08 am
First Name: DAN
Last Name: MCEACHERN
Location: ALAMEDA,CA,USA

Re: Ball bearing 4th main

Post by Dan McEachern » Wed Aug 19, 2020 2:31 pm

Age old question- is the plug in the tail shaft? Assuming it is, you can take a piece of 3" exhaust tubing and tack weld an oil shield onto the 4th main body over the spring to keep oil off the bearing . Also get a bearing that is both shielded and sealed if possible. Is it an R24 bearing or does it have a bushing on the ID?


Topic author
Dan Hatch
Posts: 1463
Joined: Tue Jan 08, 2019 7:31 pm
First Name: Dan
Last Name: Hatch
Location: Alabama
MTFCA Number: 49974

Re: Ball bearing 4th main

Post by Dan Hatch » Wed Aug 19, 2020 3:05 pm

Plug is there. R24 bearing. I was wondering about a oil slinger in front of bearing.
Most likely just a cheap a$$ sealed bearing.


Jim Eubanks
Posts: 101
Joined: Mon Jan 07, 2019 6:04 pm
First Name: Jim
Last Name: Eubanks
Location: Powell, TN
MTFCA Number: 49847
MTFCI Number: 8340

Re: Ball bearing 4th main

Post by Jim Eubanks » Wed Aug 19, 2020 5:23 pm

I know you will not want to hear this but IMHO a bearing there is the fastest way to break a crank. I have removed those from my T's and gone with rebabited original fourth mains after breaking two cranks.


Tmooreheadf
Posts: 107
Joined: Sun Jan 06, 2019 7:31 pm
First Name: Tom
Last Name: Moorehead
Location: Louisville, KY
MTFCA Number: 22348
MTFCI Number: 18916

Re: Ball bearing 4th main

Post by Tmooreheadf » Wed Aug 19, 2020 6:07 pm

I've had issues with leaks at the shaft and Babbitt 4th main when using the transmission screen. Does it have a screen?


Les Schubert
Posts: 684
Joined: Thu Jan 10, 2019 5:47 pm
First Name: Les
Last Name: Schubert
Location: Calgary

Re: Ball bearing 4th main

Post by Les Schubert » Wed Aug 19, 2020 8:28 pm

Jim
I’m pretty sure that Dan has that concern dealt with as I’m pretty sure he is running a “floating transmission shaft”!!


Original Smith
Posts: 1769
Joined: Tue Jan 08, 2019 10:43 am
First Name: Larry
Last Name: Smith
Location: Lomita, California
MTFCA Number: 121
MTFCA Life Member: YES
MTFCI Number: 16310

Re: Ball bearing 4th main

Post by Original Smith » Wed Aug 19, 2020 8:43 pm

What is wrong with a babbet, or even a bronze bearing? No problems there. There are examples of broken flanges with those ball bearing jobs.

User avatar

Henry K. Lee
Posts: 3579
Joined: Sun Jan 06, 2019 11:09 am
First Name: Henry
Last Name: Lee
Location: South Pittsburg, TN
MTFCA Number: 479
MTFCA Life Member: YES

Re: Ball bearing 4th main

Post by Henry K. Lee » Wed Aug 19, 2020 8:45 pm

Been building T engines from stock to super high performance for 25 years plus. Only broken two cranks using over 50 ball bearing forth mains were due to me. Those cheap newer ones with Chinese ball bearings not only will leak like crazy but the bearings fail and could cause the crank to break. I had one of the newer ones delivered to me, had a rough spot. I broke the bearing case just to see what was causing it. OMG, The inside of the ball bearing cage look like someone on their rice break made it with a die grinder. Do the math folks.., cheaper items are junk, pay the price for quality and be done with it! For what is worth.


Hank


Topic author
Dan Hatch
Posts: 1463
Joined: Tue Jan 08, 2019 7:31 pm
First Name: Dan
Last Name: Hatch
Location: Alabama
MTFCA Number: 49974

Re: Ball bearing 4th main

Post by Dan Hatch » Thu Aug 20, 2020 6:09 am

Customer brought me another bearing, will try that one. Thanks Dan


D Stroud
Posts: 943
Joined: Sun Jan 06, 2019 10:45 am
First Name: David
Last Name: Stroud
Location: Mound City, MO 64470
Board Member Since: 2011

Re: Ball bearing 4th main

Post by D Stroud » Thu Aug 20, 2020 7:23 am

I have not had any experience at all with the ball bearing fourth mains, but I have had a LOT of experience with other applications of bearings, both ball, and tapered in a past life. Unfortunately, there are a LOT of so called USA made bearings out there that only have a USA brand on them that have been bought out by another company. I have found many pillow block ball bearings among others that had a LOT of play in them, no way would the seals seal. JMHO. Dave
1925 mostly original coupe.


Gonenorth
Posts: 121
Joined: Tue Jan 08, 2019 6:04 pm
First Name: Kevin
Last Name: Whelihan
Location: Danbury, WI
MTFCA Number: 30688
Board Member Since: 2008

Re: Ball bearing 4th main

Post by Gonenorth » Thu Aug 20, 2020 8:13 am

The other issue is "faked" bearings from offshore sources. I pretty much exclusively use SKF bearings because they are some of the best in the business. But there can be problems there as well. This explains the predicament SKF is in pretty well:

https://www.skf.com/us/organisation/bra ... tion[quote][/quote]

User avatar

Henry K. Lee
Posts: 3579
Joined: Sun Jan 06, 2019 11:09 am
First Name: Henry
Last Name: Lee
Location: South Pittsburg, TN
MTFCA Number: 479
MTFCA Life Member: YES

Re: Ball bearing 4th main

Post by Henry K. Lee » Thu Aug 20, 2020 8:21 am

Kevin you are so right!

I find NOS in the box, ie SKF, NP, Timken, etc on Tbay from industrial bearing Liquidators. Works for me. Too many big corporations are out sourcing to third world counties.

Hank


bud delong
Posts: 348
Joined: Tue Feb 26, 2019 9:09 pm
First Name: Kenneth
Last Name: DeLong
Location: wheeler,Mi

Re: Ball bearing 4th main

Post by bud delong » Thu Aug 20, 2020 9:20 am

When i broke a crankshaft i found the ball bearing 4"th main had gone bad. The bearing had a shield on the back side only and the bearing was exposed to the engine oil.I went back to Ford on rebuilt but i would not put much faith in off shore junk. Often buying the very best is cheaper in the long run!! Bud. :D

Post Reply Previous topicNext topic