428d Grasshopper mower Hyd.

[fastcutter]

I have a 428d with like 1900hr's on it and the controls a real sponge. After a hour or s the mower will slow down and after 4 hours it real slow... What do you think PumpS? When it cold it is bad fast...

[Mowingman]

When was the last time you changed the hydro. filter and hydro. oil.??

[fastcutter]

we change it at 300,then 400,400,400, and now it have like 300 on it.

[Mowingman]

I would go ahead and change the hydro. oil and filter.
also, check your hydro. belt and tension idler. your belt may be getting hot and starting to slip as it gets hot. Any slippage = less power at the wheels.

[fastcutter]

it's got a new belt,springs and tension idle. If i have to put wheel motors and pumps on it I buy a new mower....