This going to be a vague explanation of my problem. After being inside my 135 to clean ipto filter twice, I now have new issue. The pto shaft spins whether engaged or not, until a load is applied, then it stops. Also, there is a whirling noise when pto is engaged. Any ideas what's up? thanks
- Thread starter a49deere
- Start date
Dieseltech
Well-known Member
- Location
- Akron, Indiana
Sounds like somethings wrong with the IPTO valve/brake assembly, or drum brake disc.
Tom from Buckeye Lake
Member
My 150 shaft spun also when in off position I could stop it with 2x4 levered against it. It's a disk brake. I was able to get a small pry bar in there via right side cover. Brake puck/piston was stuck.
Tom from Buckeye Lake
Member
IPTO pump pressure test port on left side cover. 125 psi non Muti-Power around 190 psi with, I think . No way to adjust with top cover on.
Tom from Buckeye Lake
Member
On 150-165 there is a lever on left/lower side of dash.
Ok, so now i feel like a real dummy!! After reading my IT manual again, it came to light that what I thought was the disengaged position of the ipto was actually the engaged position. So now pto seems to work as it should, except that pto shaft still spins with nothing attached to it. It will sometimes stop when rmps are up to 540 speed and you shift it in and out. So, my question now is, Where does all the pressure that the ipto pump produce go when pto is in the disengaged postion? Mine make a funny whining type noise when disengaged! I did a pressure check and pump is making good pressure. Thanks in advance
Tom from Buckeye Lake
Member
In the off position the pressured oil is ported to the brake. What you're seeing is just the surface tension of the oil spinning the clutch disk. That is why there is a brake to apply pressure to the disk. In my opinion the brake was not designed to STOP driven equipment. It is there to hold the PTO shaft in the off position. As I stated there is a small brake puck (pad) that is only maybe 1 square inch in surface area. Mine was stuck within the cylinder. I installed an over-running clutch on my 150. The brake stops the PTO shaft while the momentum of the brush cutter coast to a stop.
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