ponytug
Super Member
The accumulator has a charging valve with an external spring that controls the flow of oil into the brake circuit, and diverts the excess oil once the internal pressure is above 600-1,000psi (I don't know exactly what pressure Power-Trac has it set at.) So the spring cycles the valve in and out, while being exposed to external dust. Eventually, the seals on the charging valve are what wear out.What happens when your accumulator wears out?
I would recommend putting a wrench on everything you could get to easily. Then determine if you want to do the harder stuff by how much you find loose (seat bolts, cooler bolts, wheel lug nuts, etc). Of course you have to check the center pin as regular maintenance.
Years ago I bought a new Kubota B7100 and when I went through checking it over, I found the steering box dry. Nothing was loose, just nobody put any oil in it. Would have made for nice steering in the years to come.
The last time I replaced the charge valve/accumulator, Terry seemed to be of the opinion that I had an internal leak somewhere (perhaps in the brake system) that was draining off the pressure, but couldn't really suggest a next step, as it was also possible the most recent charge valve had an internal issue. The jury is still out. The symptom is that the charging valve cycles way too frequently, as in every twelve seconds.
All the best,
Peter