How to start 3D design from the 2D sketch

So you have a 2D sketch in PDF and need a 3D model...

To achieve this, I would perform the following steps:

1. Perform a screen shot of a top, side or front view of the part. Paste this into an image editor and label your views. (Avoid isometric and perspective views, you need views that show straight edges or true lengths).
2. Scale your images to its true lengths (draw a line from one dimensioned edge to another, and then draw a line that is its true length: Use an align command or a scale command in an image editor or cad program and align the image and line to its true length).
3. Insert your scaled images. Open up a cad software and insert your front view image on a front plane or a plane facing you. Insert the top image on a top plane and the side image to the side plane.
4. Model your object. Trace the object and dimension the object. Extrude to its true length (If your drawing on the top plane, use the front or side plane as a reference to the length of your extrusion).

Russell has a good idea, and it may be the best option in this case since the drawing appears to be missing dimensions which would be critical to recreating the part just from the views and dimensions.
Tracing will lead to a pretty close model, but it will not be perfect.

The drawing notes refer to both a CAD model (GN31210.prt) and a casting drawing (GN002C.dwg). Are those available? Do they contain the missing information... Obviously, having the .prt file negates the need to remodel this.

One limitation to tracing in the Manner Russell shows is the top view. Because the plate with the mounting holes is at an angle, the top view does not give the correct profile, or hole locations. View KK looks like it was rotated to have the plate parallel to the sheet, and is a better view to work with.

But, this is not a model which someone new to 3D CAD should start with. There are a few weeks of "easier" models to learn before this one.
Post some of your existing models so we get a sense of your capabilities.

I make 3D model from 2D sketch and credit goes to Russell Cantos,

Thanks you very much Russell Cantos,

I attached STEP and IPT file for review, I make 3D model but i need to verify it is correct or not?

And most well-come for the comments and suggestion also.

Sorry for my bad English.

The drawing could use one more section view to be a bit clearer, but I don't think the elliptical hole/port is open on both the top and bottom of the model. That turns this piece into more of a T fitting, I believe the drawing shows an elbow instead.

Let's assume view 9,G is the top view. There is no opening shown.
View 9,C (bottom view) shows the elliptical opening.

Good work though. It is a tough drawing to work from.