Engine

The Cub Club -- Questions and answers to all of your Cub related issues.
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.
User avatar
Slim140
501 Club
501 Club
Posts: 4772
Joined: Wed Nov 22, 2017 6:24 am
Zip Code: 00000
Tractors Owned: .
1970 International 140
1972 International 140
1949 John Deere A
1993 Ford 4630 W/Loader
1965 John Deere 110
1961 Cub Cadet Original
Circle of Safety: Y

Re: Engine

Postby Slim140 » Mon Nov 04, 2019 1:01 pm

xrcr wrote:Shane N. That pic convinced me to spend the money. Where did you get your new bolts? Alot of questionable stuff on the interweb

McMaster Carr
Every home is a school, what are you teaching?

Circle of Safety

User avatar
Glen
10+ Years
10+ Years
Posts: 5344
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Engine

Postby Glen » Tue Nov 05, 2019 12:14 am

Hi,
IH changed the bolt head markings on Cubs in about the mid 1950's, to the modern style of markings, with 3 or 6 lines going out from the center of the bolt head.
There was the dot in the center, like before, but they have 3 or 6 lines also.

Then in about 1956, they changed to an IH in the center of the bolt heads, and the 3 or 6 lines.
The head bolts on my 1956 Cub have the dots, and 6 lines, which is grade 8.
The front axle clamp bolts have the 6 lines, also. I think all the other bolts on it have 3 lines, which are grade 5.

Below is the torque table from the Cub service manual. It shows the styles of bolt heads at the lower right of the page. The table is from the manual made in the mid 1970's, IH was using bolts with W P on the heads, and the lines.
Every Cub manual I have seen says to torque the head bolts to 45 ft lbs, if you look at the table, the only 3/8 bolt that they say to torque up to 45 lbs is the grade 8, the grade 5 says less torque.

http://www.farmallcub.info/manuals/gss- ... 000-06.jpg

I think that the first several years of Cubs, with the dot on the head bolt heads, and no lines, were probably grade 8, even though it doesn't say. Grade 8 is the only 3/8" bolt in the table above that they say to torque to 45 ft. lbs. I don't know if it's possible to know for sure about the older bolts with only the dot.
Maybe Jim B. and other experts will comment about that. :)
Last edited by Glen on Tue Nov 05, 2019 10:18 pm, edited 1 time in total.

Jim Becker
Team Cub
Team Cub
Posts: 16291
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: Engine

Postby Jim Becker » Tue Nov 05, 2019 1:57 am

If you have spent much time in the parts catalogs, you have seen that many bolts (and other standard fasteners) are listed below the part they hold and are called out by the standard description. It may have a part number, which is usually entirely numeric. If a fastener is specific to a certain use, it is identified by an IH part number (D number, R number, C number, etc.) and will not have a standard fastener description.

The original Cub parts catalog identified the head bolts by part number, with no size description. Therefore, they were not standard fasteners. If you look in TC-37F, the head bolts are still listed by part number, the same number they used in 1947. Since the late Cubs seem to have actually been built using standard grade 8 bolts, they evidently decided standard grade 8 was close enough to the originals. I never tried ordering by part number from IH, so don't know what they supplied as replacements.

Keep in mind that the "dot" head means only that the bolt was made by IH. I am not aware It tells you anything relative to modern bolt grading.

tst
10+ Years
10+ Years
Posts: 4588
Joined: Tue Jan 12, 2010 2:08 pm
Zip Code: 12514
Circle of Safety: Y

Re: Engine

Postby tst » Tue Nov 05, 2019 8:01 am

I have a couple head bolts in the IH package, they are grade 8 bolts

User avatar
Glen
10+ Years
10+ Years
Posts: 5344
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Engine

Postby Glen » Tue Nov 05, 2019 11:40 pm

xrcr wrote:Another question is how do you get the valve spring keepers off without losing them. It's upside down from what I'm used too. I've got some ideas but thought I would float the question to the experts


Hi,
You could use a small magnet to keep them from falling down, but if it doesn't make contact with them, they could drop.
Your hand might be the best way.
You can also temporarily plug the holes in the block with folded rags. :)

inairam
5+ Years
5+ Years
Posts: 2249
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v c-2
1975 with woods 42-6 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 12 v
Terramite T-6 4WD Backhoe Perkins diesel
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: Engine

Postby inairam » Wed Nov 06, 2019 6:59 am

wrap the magnets in a rag and stuff the rag on the bottom of the valve gallery. The first thing you do after you take the valve cover off. you can buy them and they do not do much harm in the pan but you still do not want them in there. The little hat-shaped valve spring seat is harder to find. you do not want to drop one of them in the pan.
When you only have 9 horsepower you need to know the names of all of the ponies!

inairam
5+ Years
5+ Years
Posts: 2249
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v c-2
1975 with woods 42-6 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 12 v
Terramite T-6 4WD Backhoe Perkins diesel
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: Engine

Postby inairam » Wed Nov 06, 2019 9:39 am

I just saw this in a news feed guess it was replated to bolt searches I did on google.

Fast Facts About High-Performance Fasteners

https://www.enginelabs.com/engine-tech/ ... fasteners/
When you only have 9 horsepower you need to know the names of all of the ponies!

Jim Becker
Team Cub
Team Cub
Posts: 16291
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: Engine

Postby Jim Becker » Wed Nov 06, 2019 10:57 am

inairam wrote:I just saw this in a news feed guess it was replated to bolt searches I did on google.

Fast Facts About High-Performance Fasteners

https://www.enginelabs.com/engine-tech/ ... fasteners/

Reads mostly like an ad for ARP the fastener company.


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: Ike and 3 guests