So how high do you guys think this needs to be off the ground? The picture shows 9" but I can get 11". Should I be shooting for as much as possible? Factory installed on the 970 says its got 9.5". The front mount hitch is 7" off the ground for comparison.
EDIT: I could mount the rear hangers on top of the tractor supports. This would put the back of the hoe up 14". Ground clearance would still be 11" though. Does that sound like too much?
As with anything else, there are trade-offs. Each hoe has different
outrigger geometries, so that has to be taken into account. If you mount
the hoe too low, you will have ground clearance (angle of departure)
problems. Too high and your outriggers will not get a good purchase on
soft or uneven ground. You do not want to lift your rear wheels way off
the ground, however. That's the realm of industrial TLBs.
With my hoe, the manufacturer recommends 12-14" ground clearance,
measured at the lowest point (boom pivot). I have had good experience
with a little less than 12". If your outriggers are really long, I would shoot
for 14".
Also remember that gound clearance at the axle can be quite a bit less
than ground clearance at the boom pivot. That's OK.