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.
About 2 weeks ago, I lost the brakes [again] on my 74 Chevy C60. The hydrovac had gone bad a few years ago, I don't use the truck much, few hundred miles a year, so I was limited on where I'd go. I dumped a load of logs here at home, they tend to push the truck ahead as they come out, hit the...
It may call for hydro. I just reference CNH as i know New Holland is fond of 10w30 everywhere. I don't know what your machine was spec'd with. Always best to follow recommendations.
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 ...