I know very little about skid steers or heavy equipment or attachments. With that said, I recently purchased a 2023 325G skid steer with several attachments including the RS72 brush cutter. When cutting high grass in fields, the cutter head loses about 9 inches in height every 5 minutes and requires constant height adjustment. John Deere has tried to fix this issue now going on 3 times and it keeps losing height. John Deere tried the RS72 on a heavier new model skid steer and found the same results but loss of height was less maybe 5 inches in 5 minutes. This doesn't seem right to me that the unit should lose height, it should remain at the height adjusted. Any input or comments to help me out is very much appreciated.
Welcome aboard! As you are finding out there are many things to learn with heavy equipment, and learn you will. When you say “losing height” do you mean that you start with the loader arms at a certain height and as you are mowing they drift down or are there gauge wheels on the mower that keep loosening up and the mower settles down?
Unit has no gauge wheels. Machine operation is normal. If you want zero drift, double pilot check (load check) valves need to be incorporated. Looking at specs and parts manual, no load check option is available. Again, operation is normal, the drift, that is. All of my road saw wheels, planers and brush hogs have gauge wheels because of drift (among other reasons). Like this Double Pilot Operated Hydraulic Check Valve, ½" NPT Ports, 11 GPM Double Pilot Operated Hydraulic Check Valve, ½” NPT Ports, 11 GPM Free Shipping summit-hydraulics.com
Correct, when I start with loader arms at whatever height and while mowing on high speed hydraulic flow, the arms and RS72 Rotary cutter assembly (which has no wheels) lowers 9 inches in 5 minutes or more than an inch a minute and requires constant adjustment which doesn't seem that this should happen even though the RS72 cutter spec meet the JD 325 skid steer weight, flow and horsepower requirements and is spec'd for that skid steere.
Thanks for your reply and help, why would they sell an RS72 unit spec'd for the machine that drifts so much (i.e., 9 inches in 5 minutes) and require constant adjustment, that doesn't make sense to me but i am listening to you and your suggestions.
Skid steer cutters are designed to skid on the dirt as you drive, not bouncing on the loader arms. Though 9 inches in 5 minutes does seem like a lot of drift, though likely not more than allowable spec
Every image I find has the unit on the ground, not elevated, while operating.
Welcome to HEF gmillner ! Maximum drift spec for that machine 0.5"/5 minutes. Those cutters are heavy, so a more rapid drift can be expected, especially when the oil gets real hot. The operators manual for that cutter also states to not exceed 1 foot off the ground when cutting.