Mt100 will not turn

[valleytractor]

I have a bobcat mt100 it travels forward and backwards but won’t turn you can manually move control to left side pump and track does nothing if you do the same to the other side pump the right side truck move I think it’s a issue with the hydrostatic pump for left side track but not sure if there is something else that could cause this

 

[fortworth-cowboy]

Did you check the linkage underneath the stick going to the hydrostatic pump?

 

[valleytractor]

Yes I did when I move linkage by hand left side pump doesn’t move track I also remove belt cover to check if pump is turning and it was