Ran a 45 inch for years it could take 7 inch but in our rock it was more comfortable at 3-4 inch seemed reliable enough for crushing equipment lol all parts are still available as far as I know we dealt with American states equipment in Wisconsin I do believe Allis is owned by Metso now You have to watch when the liner is getting wore down that you dont run it up into the spider with the hydro ...
I'm finnally starting to work on my 963. Its problem (I believe) is that the hydro oil is getting clear into the flywheel case and coming out the breather. Is there a "flywheel case" and then a "gear case"-going from the engine back- and then the hydro? There are 2 breathers on top- one on the...
Blount (is or was, not sure if they sold) owns both Hydro AX and Prentice as well as a bunch of other logging equipment manufacturers. RMS has been a distributor for many years.
I put Mag1 aw46 in my new holland skid steer and other excavators; it's available from lowes for the best price on hydro oil I've seen, about $25/2.5 gal. Bobcat "proven performance" oil goes for about $65/2.5 gal. Here's the chart from the t740 service manual regarding hydro oil.
Had our local hydro vac crew come and clean one out just to see how it worked and I was sold. 2 huge advantages are 1) so much cleaner, way less clean up after the repair. Huge time savings there. They suck out the mud and haul it off, we bring in clean dirt after the repair has been made.