D8H 46a transmission pump replacement

What s/n?
Fill pump with oil before operating, can top off using test plug. Make sure you don't have air leaks in the suction piping. Does it have the suction piping upgrade?

Thank you for your reply the serial number is d7E 6937 tahts on the cab the engine is D846A 7778 as for the pipe upgrade I am not certain. I looked for a flow chart in my manual I must have been blind .

You should cut 1/8th inch off the end of the pump shaft before installing .
This is cat recommended procedure.
If this is not done the new pump shaft rides on the unworn part of the inner spline . This puts end thrust on the pump shaft . The end thrust will destroy your new pump.

For that s/n...

New pump installed pump shaft severally worn no wear on drive side.

The pump only partial fixed the problem will try replacing the suction screen in trans . I also wonder if the return which was replaced with a smaller hose could pose a problem

You may find your new pump already stuffed if you did not shorten or bevel the shaft on the new pump, it doesn't take long at all to tear the face off the end when the gear is pushed hard against it.

Wombat