• FIRST AND LAST NAMES ARE REQUIRED WHEN REGISTERING

Trying Something ... With Your Help

IH Cub Cadet Tractor Forum

Help Support IH Cub Cadet Tractor Forum:

Mark Plukas

New member
Joined
Jan 5, 2023
Messages
2
Location
Franklin, MA
displayname
Mark Plukas
I recently acquired a 680 Hydro with a bad engine. I also have a Kubota 3-cyl diesel. My intention is to put that diesel in the 680. Rumor has it that the frame rails will accept the Kubota. Fingers crossed!
 

lpalma

Well-known member
Joined
Jul 19, 2008
Messages
1,330
Location
new jersey
displayname
Lewis Palma
As long as you have the complete engine, motor mounts and and a radiator, but it will be a challenge if it did not come out of a cub cadet.
 

Bret McFarland

Well-known member
IHCC Supporter
Joined
Jun 30, 2022
Messages
129
Location
Western Maryland
Sounds like a good project! The Kubota D600 should fit. The 680 has the same frame as the 882 or 782D which had the Kubota D600. Not sure if the spec number on the D600 would matter, but it might in order to have the correct PTO shaft length. If your motor came from a Kubota tractor, it may have differences. You may want to look up the model number/spec number to find out. Otherwise I think that there would be quite a few parts involved, including:
- the correct motor mounting plate
- correct PTO clutch for the D600 or WG600
- throttle cable
- the wiring harness would be different and I believe the ignition switch
- fuel tank, fuel lines, and pump (battery and fuel tank swap places)
- need the radiator from another Cub with the 3-cylinder Kubota (782D, 882,1512, 1572, 1772, 1782, 2182)
- you'll need a water temperature gauge

It would be nice to find a 882, 782D, etc. donor tractor for parts
 
Last edited:

1811Cub

Well-known member
Joined
Jul 13, 2020
Messages
871
Location
Elkland, PA
displayname
1811Cub
The list of diesel specific parts is a long one. This swap would be far easier with a donor tractor, but they are few and far between.
 

Cubbie

Administrator
Staff member
Administrator
Moderator
Joined
Oct 4, 2019
Messages
505
Location
SE USA
displayname
Porch lover
Welcome to the forum, Mark!
Nice to have you here. Good luck with your project.
Got any pics handy?
 

Mark Plukas

New member
Joined
Jan 5, 2023
Messages
2
Location
Franklin, MA
displayname
Mark Plukas
As long as you have the complete engine, motor mounts and and a radiator, but it will be a challenge if it did not come out of a cub cadet.
Totally hear you Lewis and Bret!

This is definitely not a resto. job. This is a mod.

Engine is a 22HP Kubota D950. The engine was once an Onan marine genset. It has been torn down, inspected, built back up with new gaskets and seals. Insides were immaculate. Here it is primed and with first black coat going on.

primed motor.jpg
First coat.jpg


From the measurements I have taken, if I remove the existing motor mounts, the engine fits between the rails on angle as mounts even though it is not a D600. The D600 is 176mm between the mounts and the D950 is 190mm but the oil pan still makes it cleanly. Dipstick will be a challenge.

I plan on fabri-cobbling most of the mounting parts, linkages, panels, battery box etc. and I have a nearby repository of old CC parts. I plan on using rubber pads for engine isolation. I should be able to machine shaft couplings and adapter plates for the drive train. Wiring is easy for me even from scratch and I plan on making a new dash for all the switches and gauges. (water temp, oil temp, oil pressure, glow plugs, battery and regulator, etc.) I am told by the previous (trusted) owner that all the hydro is solid.

Radiator will likely be a new one for a quad or some such...I do need to make sure it has the capacity to cool a diesel doing work. Will need to plumb for radiator and exhaust as it came with raw water heat exchangers.

SOOOO many decisions to make...but I am excited.
 

Bret McFarland

Well-known member
IHCC Supporter
Joined
Jun 30, 2022
Messages
129
Location
Western Maryland
Totally hear you Lewis and Bret!

This is definitely not a resto. job. This is a mod.

Engine is a 22HP Kubota D950. The engine was once an Onan marine genset. It has been torn down, inspected, built back up with new gaskets and seals. Insides were immaculate. Here it is primed and with first black coat going on.


From the measurements I have taken, if I remove the existing motor mounts, the engine fits between the rails on angle as mounts even though it is not a D600. The D600 is 176mm between the mounts and the D950 is 190mm but the oil pan still makes it cleanly. Dipstick will be a challenge.

I plan on fabri-cobbling most of the mounting parts, linkages, panels, battery box etc. and I have a nearby repository of old CC parts. I plan on using rubber pads for engine isolation. I should be able to machine shaft couplings and adapter plates for the drive train. Wiring is easy for me even from scratch and I plan on making a new dash for all the switches and gauges. (water temp, oil temp, oil pressure, glow plugs, battery and regulator, etc.) I am told by the previous (trusted) owner that all the hydro is solid.

Radiator will likely be a new one for a quad or some such...I do need to make sure it has the capacity to cool a diesel doing work. Will need to plumb for radiator and exhaust as it came with raw water heat exchangers.

SOOOO many decisions to make...but I am excited.
Swweeeeet! Nice motor. I would go full-frankentractor on this one!
 

Bret McFarland

Well-known member
IHCC Supporter
Joined
Jun 30, 2022
Messages
129
Location
Western Maryland
I recently acquired a 680 Hydro with a bad engine. I also have a Kubota 3-cyl diesel. My intention is to put that diesel in the 680. Rumor has it that the frame rails will accept the Kubota. Fingers crossed!
This might help ... here is a rare find (if you have not seen it) -- an 882 parts tractor nearly complete:

1673722713809.png
 

Latest posts

Top