toro z420 zero turn mower

[welshy8]

g,day menbers , i am new to the site and am from down under , (australia), and i have a small problem with my ride on mower. it is a TORO ZERO TURN Z420, and i am having trouble with the steering as follows .
when i push the two controls forwad , the mower wants to slightly go to the left, IF I BACK OFF ON THE LEFT HAND LEVER ,IT WANTS TO GO A LITTLE FASTER , , can i adjust the right and the left hand controls ,so it will steer straight , i would like to get a workshop repair manual for it ,but dont know were to start looking . i am rertired and in my late sixtys ,and am fairly handy with spanners , so any help would not be forgoten . the motor is a twin cyl/ kolher ,i believe 19 hp, , and the next question , can i get to be able to get a little more speed out of the mower and how do i do it , .
take care guys . ladys , and cheers , welshy 8

 

[mowerman05]

welcome to lmf, years ago I had a toro z400 series mower that did the same thing and I just learned to deal with as it was not that bad. I could not mow full speed with the 19 hp on a 52 in deck and get a good cut. Never tried to fix it just used it that way until I sold it and went JD green 60 in 29 hp.

 

[welshy8]

welcome to lmf, years ago I had a toro z400 series mower that did the same thing and I just learned to deal with as it was not that bad. I could not mow full speed with the 19 hp on a 52 in deck and get a good cut. Never tried to fix it just used it that way until I sold it and went JD green 60 in 29 hp.

g,day pal. thanks for that info , but i am a tinker and like things to preform right , i will still keep looking for an answer so i can help an other member if they have the same trouble . .thats just me . like helping other people out .
cheers /take care . welshy8

 

[chance123]

For now
With the brake off and in neutral position, does it creep forward or back at all?

 

[welshy8]

For now
With the brake off and in neutral position, does it creep forward or back at all?

g,day pal. answer to your anwer is no , it does not creep at all . everthing is fine ,except pulling slightly to the left , if i back off on the left drive ,it steers straight and gains a little more speed forward . its as if the left hand drive is holding it back a little .
cheers ,welshy8:licking:

 

[Rivets]

Post the model and serial numbers off the silver tag and I will see if I can finda service manual.