Try not to be too critical about the seat height/location,,
when it operates correctly,, that high seat actually has a function
for you.
I have a similar high seat,, and I always wondered why the tractor was designed for a minimum 6'7" person.
I recently read about the JD similar model, it has a seat like this.
The purpose of the seat is to assist the operator in changing from a seated to a standing position, and back.
Apparently, there are tractor operations that require frequent changes from seated, to standing..
I currently have a nice replacement seat that does that exact function.
Set the seat to the operators weight, and height,
the seat functions perfectly moving the operator with assist from seated to standing, effortlessly.
When you sit down, the seat is supposed to lower by body weight, then rise as you attempt to get up.
Sorta like a handicapped lift chair, but, no need to push a button, and wait for the actuator.
I think the seat will move over 6 inches in height travel.
It is nice when you sit down, and the seat contacts you, lowering you easily, the rest of the way.
My seat came from
Welcome to KAB Seating , but, I do not see my model there now.
I did buy my seat 15 years ago, and it still works like the day I installed it.
I have the 584, with the 2250 loader,, and have owned it for 25 years.
I had to replace the sending unit to get the temp gauge working,, that was a trick finding one that matched the gauge,, but, with an ohm meter, I was able to determine the right sending unit,, that only cost about $12.
My fuel gauge is a little "WONKEY",, but, I know when to get fuel.
My AMP "idiot light" has always functioned perfectly.
The "one wire" self exciting alternator has to get some RPM's up to start charging.
That is normal for that type alternator.
I have the identical IPTO,, and the big difference I see is that my 4 gears are in a row,, straight,
instead of the "H" pattern on the 585.
When I drive the 1/2 mile to my daughters, the 4 gears shift by simply depressing the clutch.
Those four gears are fully synchronized.
You do not have to start out in high gear,,
It sorta sounds like a diesel sports car going through the gears.
I know the sound of the tractor drives a couple of my neighbors crazy,,
They have even mentioned how nicely the machine goes through the gears, and accelerates.
That transmission would be amazing at pulling a trailer,,
If you can not get the tach to work,
something as simple as a Briggs & Stratton 19200 Tachometer should easily tell you PTO speed.
That tach will mechanically allow you to know the engine speed of a particular throttle setting.
I have that tach for use with garden tractors.
Amazon.com: Briggs & Stratton 19200 Tachometer,Black : Patio, Lawn & Garden
www.amazon.com
After you use the tractor 5-10 times, you will "know" where to set 540RPM pto speed.