154 Diesel engine swap

IH CUB Lo-Boy Series - 154, 184, 185 Forum -- Questions and answers to all of your Lo-Boy 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.
Gumbert1542
Posts: 5
Joined: Mon Dec 09, 2019 10:55 pm
Zip Code: 15434

154 Diesel engine swap

Postby Gumbert1542 » Mon Dec 09, 2019 11:04 pm

Started out on the yesterdays tractor forums before I found you guys so here it goes. I have a cub 154 around a 73 model I believe. Got it dirt cheap and after a year of mowing, pulling carts, and plowing snow I have decided it’s time for a little more HP. I’ve seen some guys on here ask about these swaps but haven’t seen one done yet so if there is please point me in that direction.

Current status is the old engines out new Isuzu 3 cylinder diesel (about 28 horse) is mocked up in place. Made the first start and run around the field today and what a difference! Let’s hope that gear box holds together.

Next step is to reinforce he frame against twist make up some nicer motor mounts wiring, paint etc.

What I have learned from the test run is that I need to move the motor forward about 4 inches to get a better CG. Which means making a longer drive shaft.

The end game is to do a write up on this whole project. Let me know what you think.
Ps how do you attach images to a post??

Gary Dotson
Team Cub Mentor
Team Cub Mentor
Posts: 4983
Joined: Thu Aug 03, 2006 6:20 am
Zip Code: 43358
Tractors Owned: 48 Cub Diesel (Cubota)
53 Cockshutt 20 restored (Shooter)
52 Cockshutt 20 unrestored
47 Leader "B" (Herckie)
49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
Kubota B6200E
Kubota B6200HST
Kubota B8200HST-D
Circle of Safety: Y
Location: OH West Mansfield

Re: 154 Diesel engine swap

Postby Gary Dotson » Tue Dec 10, 2019 8:29 am

I've seen several 154's converted with various engine brands: Cat., Yanmar, Kubota but haven't seen one with an Isuzu yet. Look forward to seeing your finished project.

User avatar
Indy4570
501 Club
501 Club
Posts: 939
Joined: Tue Nov 28, 2017 2:12 am
Zip Code: 65608
Tractors Owned: 49 F cub, donor
50 Farmall Cub bugeyes(dead)
51 Farmall Cub
53 Farmall Cub
55 Farmall Cub Clementine
55 International loboy
57 International loboy
62 140 Industrial The Beast
50s Allis Chalmers B
50 Ferguson TO20 Huppster
49 Ferguson TE20 Fergie
JD 790 4x4 w/backhoe
hinomoto diesel 4x4, early to mid 80s 20HP
73 Pasquali 4x4 diesel 33HP
74 Toro golf course tractor
Gilson 18HP
Circle of Safety: Y
Location: Missouri Ozarks

Re: 154 Diesel engine swap

Postby Indy4570 » Tue Dec 10, 2019 11:00 am

I have an isuzu diesel but I think its a 4cyl. sitting in an old chevette

I would LOVE to see a full thread about your conversion!!!! :tractor:
Circle of Safety
better to have it and not need it than to need it and not have it...( YES this includes CUBS! )

Jim Becker
Team Cub
Team Cub
Posts: 16453
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: 154 Diesel engine swap

Postby Jim Becker » Tue Dec 10, 2019 11:51 am

What is the maximum torque from that engine? I assume the 28 horsepower is developed at substantially higher RPM than was with the original engine. You may not need as much frame reinforcement as you might imagine.

User avatar
BIGHOSS
Cub Pro
Cub Pro
Posts: 1741
Joined: Tue Jul 18, 2006 9:55 pm
Zip Code: 37087
Tractors Owned: 1947 Cub S/N 9216
w/ C-22 Mower

1974 Cub S/N 244814
w/59 Woods Mower

Ford 3000 Gas S/N C375091 w/Bushhog QT2345 Loader & 6' Squealer Bushhog
and a Palomino Mare named GIGI
Circle of Safety: Y
Location: TN, Lebanon

Re: 154 Diesel engine swap

Postby BIGHOSS » Tue Dec 10, 2019 12:29 pm

I know that Gary Dotson's CUBOTA with diesel has been on the dyno a few times. Does Gary or Steve remember what the HP and Torque values were?
"Courage is being scared to death-but saddling up anyway".......John Wayne

BigBill
10+ Years
10+ Years
Posts: 7388
Joined: Sat Jul 22, 2006 5:02 pm
Zip Code: 00000
Location: in northern usa

Re: 154 Diesel engine swap

Postby BigBill » Tue Dec 10, 2019 12:43 pm

Diesel engines are lower rpm more torque in some applications, im not sure how strong the tranny is.

I stripped my 154 frame down to box it and found the cross steel only welded on one side. I ended up putting in the missing vertical welds and double wall the frame from the front all the way back to the FEL uprites, no more twisting. But a new front axle with more movement is needed. The space between the frame and positive stops on the axle needs to be longer.

The frame twisting is so bad in a off camber situation the fan blade digs into the fan shroud.
When the front axle limiter bottoms out the frame starts to twist if we keep on going. Been there in pushing dirt into piles.
Last edited by BigBill on Tue Dec 10, 2019 8:15 pm, edited 1 time in total.
I'm technically misunderstood at times i guess its been this way my whole life so why should it change now.

Gumbert1542
Posts: 5
Joined: Mon Dec 09, 2019 10:55 pm
Zip Code: 15434

Re: 154 Diesel engine swap

Postby Gumbert1542 » Tue Dec 10, 2019 2:02 pm

Yeah I found the old bubblegum steering box fix and it was the same way. One side was welded to the frame. The other just hung there. At 2200 RPM I should have around 22hp and 38 or foot pounds of torque. Transmission worries me but I’m guessing I’ll smoke clutches long before I chip teeth. Not real fond of the 154’s lethargic clutch.

I will say boxing my frame or putting some ladder stifners in it is a must. I saw the twist the worst on start up and shut down. I suspect if I don’t reinforce I’ll warp it after a couple days of hard pulling uneven ground.

One of the biggest issues I’ve come across is the steering. I had to drop everything 5 inches to clear the oil pan. Mainly because the driveshaft on these tractors is a straight shot. Not much room for play up and down. I’ll say this if the engine was even two inches taller or the oil pan was an inch deeper I don’t know what direction I would have had to go

Jim Becker
Team Cub
Team Cub
Posts: 16453
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: 154 Diesel engine swap

Postby Jim Becker » Tue Dec 10, 2019 3:07 pm

So about the same.
viewtopic.php?f=1&t=15061

BigBill
10+ Years
10+ Years
Posts: 7388
Joined: Sat Jul 22, 2006 5:02 pm
Zip Code: 00000
Location: in northern usa

Re: 154 Diesel engine swap

Postby BigBill » Tue Dec 10, 2019 8:10 pm

I thought the standard fcub c60 engine with flat top pistons was 9 hp? Where the int154 lowboy was 15.4 hp and the 184/185 were 18.4/18.5 hp? Isn’t the max rpm different between the fcub and 154/184/185 too?
I'm technically misunderstood at times i guess its been this way my whole life so why should it change now.

Gumbert1542
Posts: 5
Joined: Mon Dec 09, 2019 10:55 pm
Zip Code: 15434

Re: 154 Diesel engine swap

Postby Gumbert1542 » Tue Dec 10, 2019 8:56 pm

Bad info in my end as well. The engine I have is a 3cb1 naturally aspirated engine. It’s maximum output is 27.5hp and 49.7 ft lbs.

Stevos_loboy
Posts: 33
Joined: Tue Jul 23, 2019 6:23 pm
Zip Code: 53508

Re: 154 Diesel engine swap

Postby Stevos_loboy » Thu Dec 19, 2019 11:25 pm

How is the diesel swap going? I am also contemplating a swap as such. I'm interested in knowing how the pan & lower end fall between the frame rails. Also, how far off is the cooling fan / radiator shroud? Do you plan to re-purpose the fuel tank for use with diesel fuel or swapping tanks? Any photo's of the rascal would be great!

Gumbert1542
Posts: 5
Joined: Mon Dec 09, 2019 10:55 pm
Zip Code: 15434

Re: 154 Diesel engine swap

Postby Gumbert1542 » Fri Dec 20, 2019 12:22 am

I need some lessons on how to post pics. Hopefully I’ll make some headway tomorrow and show you guys what it’s like so far. Any ideas how I can post pics??

BigBill
10+ Years
10+ Years
Posts: 7388
Joined: Sat Jul 22, 2006 5:02 pm
Zip Code: 00000
Location: in northern usa

Re: 154 Diesel engine swap

Postby BigBill » Mon Jan 06, 2020 12:52 am

I double walled my 154 frame from the front to the front loader brackets. Using steel channel that’s the same height.
I'm technically misunderstood at times i guess its been this way my whole life so why should it change now.

User avatar
Glen
10+ Years
10+ Years
Posts: 5520
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: 154 Diesel engine swap

Postby Glen » Sun Jan 12, 2020 12:45 am

Hi,
To post pics, below the box where you write what you want to post, is a tab that says Attachments. Click on that, and a box that says Add Files will come on. Click on that, and the pics stored in your computer will come on, select the pic you want, click on it and it will load in. If it is too big, it won't work, I think it says if the pic is too big. Then you will need to reduce the size of the pic.

Type your message to post, you can look at it and the pics before posting them by clicking the Preview button next to the Submit button.
Then when it is how you want it, post it, the pics will be there too. :)


  • Similar Topics
    Replies
    Views
    Last post

Return to “Lo-Boy Series - 154, 184, 185”

Who is online

Users browsing this forum: No registered users and 0 guests