Bellcrank Extension Modification for push blade

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capefarm
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Zip Code: 02653
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Bellcrank Extension Modification for push blade

Postby capefarm » Tue Mar 31, 2020 9:47 am

With the front blade lifting rod attached directly to the bell crank, it was at a slight angle to the lifting lever, and was causing some wear. A bell crank extension solved this by making the rod parallel, as it were, to the lever; however, the blade would then only raise 4" above the ground, a problem when dealing with the berms left by the road plows. I made this simple fix from I/4" aircraft alloy stock on hand, and now the blade can be raised 11" off the ground.
PICT0196.JPG


Required isolation can bring forth ideas, and I hope this qualifies as a good one.
Last edited by capefarm on Tue Mar 31, 2020 6:41 pm, edited 1 time in total.

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Urbish
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Re: Bellcrank Extension Modification for push blade

Postby Urbish » Tue Mar 31, 2020 9:54 am

Keep that pivot well lubricated as the aluminum will wear quickly. You might want to further enlarge the hole in the aluminum and install a bronze or acetal plain bearing. But this is a good fix to the geometry to get you by for now.
Jim

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pst
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Re: Bellcrank Extension Modification for push blade

Postby pst » Tue Mar 31, 2020 10:29 am

could you post more pic's of your setup as I need to set mine up soon and have never done that before thanks
Pat
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radioguy41
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Re: Bellcrank Extension Modification for push blade

Postby radioguy41 » Tue Mar 31, 2020 10:32 am

I made a similar mod in order to get the blade to lift higher. You can see the rub mark the original boomerang made. Like yours the blade now lifts about a foot. That boomerang was never, in my opinion, a good design. It's big, fat, and strong but the one thing it's designed to do, lift the blade, it just doesn't do well.

54 push blade-42s.jpg

Larry
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Urbish
5+ Years
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Posts: 2125
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
Tractors Owned: ~
1958 International Cub LoBoy
1948 Farmall Cub
1977 International LoBoy 184
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B

Cub-193 Moldboard Plow
Cub-54A Leveling and Grader Blade
Cub Loboy L-54 Leveling and Grader Blade
Unknown 5' Single Gang Disc Harrow
Circle of Safety: Y
Location: Manchester, MI

Re: Bellcrank Extension Modification for push blade

Postby Urbish » Tue Mar 31, 2020 11:36 am

radioguy41 wrote:I made a similar mod in order to get the blade to lift higher. You can see the rub mark the original boomerang made. Like yours the blade now lifts about a foot. That boomerang was never, in my opinion, a good design. It's big, fat, and strong but the one thing it's designed to do, lift the blade, it just doesn't do well.

54 push blade-42s.jpg
Larry



Mine is a lot like yours, but doesn't stick out forward quite as far. Works great and I get about 16" of lift at the cutting edge. But it doesn't do much to solve the Capefarm's original goal which was to put the rod attachment points in-line so that the rod isn't pushing sideways.

There is relevant discussion in this post: http://farmallcub.com/phpBB2/viewtopic.php?f=1&t=87470



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radioguy41
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Cub-54A Grader Blade
Cub-22 Sickle Mower
Planet Jr/Cole 300A Seeder
IH 59P Shredder
Circle of Safety: Y
Location: Lehighton, PA

Re: Bellcrank Extension Modification for push blade

Postby radioguy41 » Tue Mar 31, 2020 3:03 pm

Yeah that old style actuator has challenges all it's own. Some people don't realize that where the pivot pins are located on the back of the blade also determines clearance. The higher up the pins the less clearance at the bottom of the blade and vice-versa. Of course moving those pivots up or down also changes the vertical angle of the blade so it's a tradeoff.

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capefarm
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Re: Bellcrank Extension Modification for push blade

Postby capefarm » Tue Mar 31, 2020 6:39 pm

A pleasure (and grateful) to see simpler and cleaner solutions than mine, which I realized would require a bronze bushing as suggested.

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Re: Bellcrank Extension Modification for push blade

Postby Glen » Thu Apr 02, 2020 1:00 am

Hi,
pst, below is the Cub 54 Blade operator's manual, if you don't have it. It has lots of info, and shows installing the blade on the Cub.
You don't use the manual lift lever, shown on page 4, if you have Touch Control. :)

http://farmallcub.com/rudi_cub/www.clea ... index.html


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