Cincinnati Hydrashift lathe hydraulic shifter

I recently picked up a Cincinnati 12.5" hydrashift lathe. I'm upgrading from years of use with belt driven lathes to a gear driven lathe. I have yet to hook it up because it has a 5hp motor in it and I need to get it powered up. However, I have a question on the hydraulic shifter.

The owner's manual shows the hydraulic pump runs of the main motor pulley. The gears are shifted when the motor is running and the lathe is in idle. The speed change dial is directly coupled to a rotary spool valve which directs hydraulic pressure to the different "pistons" that contain forks/arms that shift the gearing of the lathe.

There is a youtube video which can be seen here:

formatting link
My lathe seems to have been modified with a 5hp motor with shafts on both ends, one drives the headstock and the other has a hydraulic pump mounted to it. This is basically the same as the original version.

My question is this, what happens when I run the motor/headstock in reverse? Does the lathe not shift gears? I do not see any type of directional valve for the hydraulics in the reverse lever. Is anyone familiar with this lathe or have something similar?

Aloha, Russell

Reply to
russell shigeoka
Loading thread data ...

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.