replacing engine rear main seal

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.

replacing engine rear main seal

Postby John *.?-!.* cub owner » Sun Aug 25, 2013 9:30 pm

i have a cub in my shop with a really badly leaking rear main engine seal. It is leaking so badly that after an hours run time it will fill the trough across the front of this flail, and the flywheel is throwing enough oil into the front of the starter that it is running out the opposite end.
Image
I already have one of Tim's rebuilt retainers and got it ready to split today, so I hope to get it finished tomorrow. it is good to for once be working on a cub with only one problem, and no stuck or rusted bolts. It is bad that it is my cub.
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry
User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
 
Posts: 19475
Joined: Sun Feb 02, 2003 2:09 pm
Location: Mo, Potosi
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.

Re: replacing engine rear main seal

Postby randallc » Mon Aug 26, 2013 5:31 am

John, enjoy the day and I know you will, those bolts come out pretty easy with that little impact DeWalt you carry. Just be careful and not break anything while you're in the process. Is splitting a cub anything like taking the hood off ? -- your gonna find something else to fix.
Guiena, 1951 Farmall Cub; Jumping Willy, 1949 Farmall Cub.
User avatar
randallc
501 Club
501 Club
 
Posts: 1085
Joined: Tue Jan 18, 2011 9:16 am
Location: Witcherville, AR
Zip Code: 72940
Tractors Owned: 1951 Farmall Cub, 152 disk plow, 2 gang disk, belly mower, sickle mower
1949 Farmall Cub, cultivator, moldboard plow, disk,front blade. Cub Cadet, LTX1045 Mower. Cub Cadet's 109, 1000, and 1250
1961 cub c2 belly mower and full blade.
Circle of Safety Award
Circle of Safety: Y

Re: replacing engine rear main seal

Postby pickerandsinger » Mon Aug 26, 2013 6:09 am

Good luck John :D :D Have fun...Dave
In Memory of 58,286
pickerandsinger
501 Club
501 Club
 
Posts: 887
Joined: Thu Oct 18, 2012 3:23 pm
Zip Code: 13143
Tractors Owned: 1957 Cub Low Boy w/ Danco c3 (Cubby)
1953 Cub w/ IH C-2 MOWER (Chompers)
1954 Cub w/IH C-3 MOWER ("ED")
1950 Ferguson TO20 w/ loader
1951 Ferguson TEA 20 (parts)
F/H Disc Harrow for cub L-38
C-22 Sickle Bar Mower
IH Cub Snow Blade 54A
York Rake for Cub home made
Single bottom Plow for Cub F194
Gravely 5660 12 hp/ w snoblower.rototiller,bush hog
Circle of Safety Award
Circle of Safety: Y

Re: replacing engine rear main seal

Postby outdoors4evr » Mon Aug 26, 2013 7:24 am

I feel your pain. I am also in the same boat with a rebuilt retainer on my 184. Loses about a cup of oil per mowing hour through the rear seal.

Are you going to just replace the seal again or do you think there is another issue causing this? I am starting to think that ring blowby pushes the oil through the seal.

What rear seal part number are you going to get now that your retainer has been machined?
184 w/ Creeper & 3-Point
IH Model 15 Tiller
outdoors4evr
5+ Years
5+ Years
 
Posts: 722
Joined: Tue Jul 22, 2008 12:44 pm
Location: Davison, MI
Zip Code: 48423
Tractors Owned: 184

Re: replacing engine rear main seal

Postby Bob McCarty » Mon Aug 26, 2013 8:07 am

Tim (tst) presses in the new seal that is the correct fit after he flattens and enlarges the seal opening.

Bob
"We don't need to think more,
we need to think differently."
-Albert Einstein
Bob McCarty
Team Cub Mentor
Team Cub Mentor
 
Posts: 5640
Joined: Tue May 25, 2004 8:02 pm
Location: CO, Longmont
Zip Code: 80501
Circle of Safety Award
Circle of Safety: Y

Re: replacing engine rear main seal

Postby John *.?-!.* cub owner » Mon Aug 26, 2013 8:58 am

randallc wrote:.......Is splitting a cub anything like taking the hood off ? -- your gonna find something else to fix.
Hopefully not, this is the same one we changed the transmission input shaft in at MidMo, so there should not be much to do other than maybe oiling the generator while the hood is off.

outdoors4evr wrote:........
Are you going to just replace the seal again or do you think there is another issue causing this? I am starting to think that ring blowby pushes the oil through the seal........
When I rebuilt the engien about 3 r so years ago I simply reused the original retainer and staked the seal in with a little sealer around it. It has held till now, but this time I ordered one of Tim's rebuilt retainers. He straightens them if needed, and Helicoils the lower holes if needed, plus cuts it out for a bigger seal and presses it in. I have used the ones Rick used to rebuild, and also Tim's before, and they do a good job of solving the oil leak problem. One note, if the old seal has worn a groove where it runs on the crankshaft you may need to smooth that up some to prevent more leaking.
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry
User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
 
Posts: 19475
Joined: Sun Feb 02, 2003 2:09 pm
Location: Mo, Potosi
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.

Re: replacing engine rear main seal

Postby Groove Critter » Mon Aug 26, 2013 7:50 pm

Hi John, It will be nice to have a fairly fixed up cub and no oil leak. I wonder how long this newer gasket will last for a working cub; anyone care to guesstimate?
The glass is half full
the upper portion is wasted material
the content is delicious, cold and refreshing!
User avatar
Groove Critter
Cub Star!!
Cub Star!!
 
Posts: 256
Joined: Fri Sep 10, 2010 6:02 pm
Location: OH, Grand River (east of Cleveland)
Zip Code: 44045
Tractors Owned: 1948 cub (Sophie)
1949 cub Loren
1954 cub Nussie

Re: replacing engine rear main seal

Postby John *.?-!.* cub owner » Mon Aug 26, 2013 8:43 pm

Groove Critter wrote:Hi John, It will be nice to have a fairly fixed up cub and no oil leak. I wonder how long this newer gasket will last for a working cub; anyone care to guesstimate?
I am expecting it to last for several years.
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry
User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
 
Posts: 19475
Joined: Sun Feb 02, 2003 2:09 pm
Location: Mo, Potosi
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.

Re: replacing engine rear main seal

Postby Stanton » Tue Aug 27, 2013 7:17 am

John, too bad we didn't do this at MidMo's Cubfest in May. Splitting a tractor is easier with helping hands.

I realize the leak wasn't that bad (or at all) in May, but we would have loved to help. :)
User avatar
Stanton
5+ Years
5+ Years
 
Posts: 2341
Joined: Mon Jun 22, 2009 6:56 am
Location: Lone Jack, MO
Zip Code: 64070
Tractors Owned: 1947 Farmall Circle Cub, serial #2116
1948 Farmall Cub, serial #46066
1949 Farmall Cub, serial #65937
Cub-54 Blade
Cub-193 Moldboard Plow
Cub No. 23-A Tractor Disc Harrow
Grosshart Post Hole Digger
Prewitt Conversion Unit
McCormick-Deering No 100 Manure Spreader
Cub-22 mower
1945 Farmall H, serial #213,651
CCC 782, serial #715729
IH #1 Cart
Circle of Safety Award
Circle of Safety: Y

Re: replacing engine rear main seal

Postby John *.?-!.* cub owner » Tue Aug 27, 2013 8:59 am

Thanks, but it is not that big a deal with the right tools and experience. Spent about hour and a half Sunday afternoon and got it to the point of unbolting torque tube. About 3 hours yesterday, which included checking clutch fingers, oiling generator, as well as other normal maintenance and a little rest, at which time my back said it was time to quit. All that is left to do now is put the hood back on, which I plan to do this afternoon.
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry
User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
 
Posts: 19475
Joined: Sun Feb 02, 2003 2:09 pm
Location: Mo, Potosi
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.


Return to Farmall Cub

Who is online

Users browsing this forum: Larry G, Papa's Cub, Poncho and 5 guests