12HT / 2H / H bellhousing interchangeability?

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You could, but it's a much better idea to get the 2H bellhousing, the assocciated gearbox and split transfer case from a later model. You'll also need to install the crossmember under the gearbox. It's worth the extra effort.
 
Hello folks. If yall want to do conversation or adaptation with different motors you could go with an adapter plate. The only thing you would be finding to correct adapter plate for your choice of engine. This is what many people do if their not sure if the components will adapt.

This is where I'm at as well.

I have a 1975 Toyota forklift with an H series diesel engine that I want to replace with a newer style motor hence (Finding Parts Easier). So I'm wanting to go two different routes and I know this would be the easiest way instead of busting my brain to figure out what works and what doesn't.

An Adapter plate.

My only issue is making sure the shaft lines up with the transmission. Finding bolt pattern schematics is an operation in itself. And to make this work, the best way to get this lined up is taking a tape measure from one side of the bell housing to the other side of the belt housing and take a photo directly on from the back and take a picture and put it in FreeCAD to get your bolt patterns of the transmission and do the same for the back end of your motor. Take a tape measure and do the same thing. Line it up with the input of the motor. In freecad you would draw your lines on the outline of the transmission and where your input shaft is you would put a center dot ( • ) And you would do the same for the engine. You would line your bolt patterns with the center. And then you make your adapter plate.

Or there is a company in I think California that makes adapter plates for all makes and models. But I don't remember the name of it. But if you can't find the adapter plate, you can always make your own if you know somebody that has the ability to do CAD work.

So my two choices are going with either a Cummins 4bt to the 1975 Toyota transmission adapter plate or Kubota diesel v2203 To a 1975 Toyota transmission.

I've asked ChatGPT if these are interchangeable engines and it said that they are but they would be modifications within mounting brackets which is no issue.

So this is just a little insight for those that are trying to Rack your brain about trying to figure out what would work and what wouldn't just go with an adapter plate and then do your modifications with your mounting brackets. The only thing is you got to make sure whatever engine you're using is going to fit in whatever application you're working with.
 
Hello folks. If yall want to do conversation or adaptation with different motors you could go with an adapter plate. The only thing you would be finding to correct adapter plate for your choice of engine. This is what many people do if their not sure if the components will adapt.

This is where I'm at as well.

I have a 1975 Toyota forklift with an H series diesel engine that I want to replace with a newer style motor hence (Finding Parts Easier). So I'm wanting to go two different routes and I know this would be the easiest way instead of busting my brain to figure out what works and what doesn't.

An Adapter plate.

My only issue is making sure the shaft lines up with the transmission. Finding bolt pattern schematics is an operation in itself. And to make this work, the best way to get this lined up is taking a tape measure from one side of the bell housing to the other side of the belt housing and take a photo directly on from the back and take a picture and put it in FreeCAD to get your bolt patterns of the transmission and do the same for the back end of your motor. Take a tape measure and do the same thing. Line it up with the input of the motor. In freecad you would draw your lines on the outline of the transmission and where your input shaft is you would put a center dot ( • ) And you would do the same for the engine. You would line your bolt patterns with the center. And then you make your adapter plate.

Or there is a company in I think California that makes adapter plates for all makes and models. But I don't remember the name of it. But if you can't find the adapter plate, you can always make your own if you know somebody that has the ability to do CAD work.

So my two choices are going with either a Cummins 4bt to the 1975 Toyota transmission adapter plate or Kubota diesel v2203 To a 1975 Toyota transmission.

I've asked ChatGPT if these are interchangeable engines and it said that they are but they would be modifications within mounting brackets which is no issue.

So this is just a little insight for those that are trying to Rack your brain about trying to figure out what would work and what wouldn't just go with an adapter plate and then do your modifications with your mounting brackets. The only thing is you got to make sure whatever engine you're using is going to fit in whatever application you're working with.
To scale and adjust a project in FreeCAD using a photo and a tape measure, you import the image, use the Calibrate tool to scale it based on a known measurement, and then trace or dimension your sketch over it.Step 1: Prepare the Image and MeasurementsFor the best results, ensure your photo was taken looking perfectly straight-on (orthographically) and include a known object (like a ruler or a measured tape) within the frame.Step 2: Import and Place the PhotoOpen FreeCAD and click File > Import to select your image.A dialogue will ask you to choose a plane (e.g., XY plane) to place the image flat against the background.The image should now be visible in your 3D view and listed in the Model Tree.Step 3: Calibrate the Image to Real ScaleDouble-click the image name in the Model Tree to open its property settings.In the Task panel, click the Calibrate button.Click two distinct points on the image that correspond to a known distance you measured with your tape measure (e.g., the edge of an object, or two tick marks on a ruler).A dialogue box will pop up. Enter the actual measurement in millimeters (e.g., if you measured 10 cm, type 100 mm) and press Enter.. The image will instantly resize to the correct physical proportions.Optional: Set an image transparency (in the settings menu) so you can easily see your sketches over the image.Step 4: Trace and ModelSwitch to the Part Design Workbench, and create a new Body and Sketch.Choose the plane matching your image.Use the sketching tools (Circle, Polyline, Rectangle) to trace the features directly over the scaled image.Use the Dimension Tool (hotkey D) to constrain your sketches to exact measurements.

 
To scale and adjust a project in FreeCAD using a photo and a tape measure, you import the image, use the Calibrate tool to scale it based on a known measurement, and then trace or dimension your sketch over it.Step 1: Prepare the Image and MeasurementsFor the best results, ensure your photo was taken looking perfectly straight-on (orthographically) and include a known object (like a ruler or a measured tape) within the frame.Step 2: Import and Place the PhotoOpen FreeCAD and click File > Import to select your image.A dialogue will ask you to choose a plane (e.g., XY plane) to place the image flat against the background.The image should now be visible in your 3D view and listed in the Model Tree.Step 3: Calibrate the Image to Real ScaleDouble-click the image name in the Model Tree to open its property settings.In the Task panel, click the Calibrate button.Click two distinct points on the image that correspond to a known distance you measured with your tape measure (e.g., the edge of an object, or two tick marks on a ruler).A dialogue box will pop up. Enter the actual measurement in millimeters (e.g., if you measured 10 cm, type 100 mm) and press Enter.. The image will instantly resize to the correct physical proportions.Optional: Set an image transparency (in the settings menu) so you can easily see your sketches over the image.Step 4: Trace and ModelSwitch to the Part Design Workbench, and create a new Body and Sketch.Choose the plane matching your image.Use the sketching tools (Circle, Polyline, Rectangle) to trace the features directly over the scaled image.Use the Dimension Tool (hotkey D) to constrain your sketches to exact measurements.


You can also do this method as well to create your own adapter plate

 
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