overdriving hydrostatic transmission ---help---

[danbo]

i am changing the hydrostatic in my 1999 simplicity broadmoor mower with a similar drive out of another mower, the drive pulley on the motor of the parts mower was a lot smaller. when i got the mower put together, the forward drive speed is about 2x faster.

my question is will over speeding the hydrostatic input cause any problems? can i leave it like this, or will i have to change the pulley?

p.s. i like it being faster.

 

[demhustler]

i am changing the hydrostatic in my 1999 simplicity broadmoor mower with a similar drive out of another mower, the drive pulley on the motor of the parts mower was a lot smaller. when i got the mower put together, the forward drive speed is about 2x faster.

my question is will over speeding the hydrostatic input cause any problems? can i leave it like this, or will i have to change the pulley?

p.s. i like it being faster.

yes, it causes cavitation and rapid transmission failure

even on youtube - simple changing pulley and overspeeding hydrotrany - easiest thing some kids do - and " its works, but not for long, and you WILL brake the trany", rather sooner, than later

 

[benski]

Yes, you'll break the tranny quite soon. Another big issue is the heat generated by turning that shaft so quickly..

 

[Carscw]

The longest I have had one last after doing a pulley swap for more speed has been around 3 hours. Accept for the one I am running now. Running heavy gear oil in it

(( racing is the only sport that you need two balls ))

 

[Grassbandit]

I know this is unrelated to the topic, but I'm wondering if a bigger engine would make the hydro faster.
I'm contemplating upgrading my 12.5HP to 17.5HP.

 

[txzrider]

Grassbandit, unless the larger motor spins faster... the hydros wont go faster. In the previous replies it was stated tha t spinning the hydros faster would be bad for the hydro. It would seem the way to speed is to use something that is not a hydro like and old fashioned tranny ...