450 LP Factory-Delete T/A Substitution Shaft

This explanation is a bit long, so bear with me. The S/N tag on my 450 LP is 25xxxC CR. "C" denotes LP gas, and the "R" denotes Torque Amplifier Attachment (With provision for Transmission Driven Power Take-Off Attachment).

Problem with this is that my tractor has an Independent PTO unit and it is a factory-delete T/A. Suffix "P" more accurately reflects the current situation of my tractor: Independent Power Take-Off Drive Attachment (For use without Torque Amplifier Attachment). I do not believe any modifications were ever done to either the (lack of) T/A or the IPTO.

See picture. The left coupler is the modified one and is not shown in my parts book. The left shaft is the one that takes the place of the T/A unit to transmit power from the engine to the IPTO unit.

Is it possible the tag was not accurately stamped at the factory? See next response for picture of the coupler.

Has anyone come across this before? Maybe I have the only 450LP factory-delete T/A with IPTO in existence? Yeah, didn't think so.

The hollow counter shaft in the transmission is used in tractors that have either a TA or IPTO or both. Since your suffice indicates that it came with a TA it will have the hollow counter shaft. The transmission driven PTO is driven by a different TA input shaft than the IPTO uses. Your tractor should have a single shaft engaged with the clutch disk and no hollow shaft engaging the clutch cover splines. Instead of just a plane shaft with splines on each end your clutch shaft also has a gear on it to drive the lower PTO shaft. This means the PTO will only run when the clutch is engaged.

If your tractor had neither a TA nor an IPTO then the transmission counter shaft would be solid like an M with a PTO like an M.

Here's a closeup of the modified coupler apparently used in factory-delete T/A 450 tractors. The shaft that replaces the T/A unit between the engine and the rear IPTO shaft (not shown) goes into the right side. The standard shaft that goes back to the IPTO unit is shown to the left.

When I was first getting started working on these red machines the older mechanic that took me under his wing would always tell me not to remember specs because it is much better to look up them each time you needed them rather than remember them and then find out you remembered wrong.