[indianamower]

Hello, I am new to Lawnsite and I am looking for some help with my dual hydro. I have a MTD Pro/Cub Cadet Commercial that is pulling to the left when both levers are even. I have to adjust the levers to take the pull to the left out. I would like to fix this so I can just mow instead of trying to adjust the levers to get the thing to mow straight. Thanks

 

[bob]

Don't forget to check the air pressure in the tires. A low left tire, will make it pull to the left.

 

[indianamower]

Air pressure is ok in the tires. Anymore ideas?

Thanks

 

[NCSERVICE]

how bad to the left? does the lh hydro feel gushy or not as responsive? hold a hill? or is everything fine it just pulls to the left.

 

[ffemt1271]

air pressure should not be equal in each tire, you have to wrap a tape measure around them and make sure they are the same size around. the air pressures may be different when you are thru. there should be an adjustment on the hydro motors that allow you to make the machine track strait. if it is not the tires i would try that next.

 

[indianamower]

ncservice
pulls pretty bad I am fighting with it all the time to get it to go straight. when you say "hold a hill" do you mean just let it sit as if i were going up a hill?

 

[NCSERVICE]

do you have hydros and wheel motors? or are they all in one units? and again does that control on the feel sloppy?

 

[indianamower]

The right hand control does feel a little soft. when I pull the left side it seems to be more aggressive. If a bagger were used quite a bit could that cause the pump to weaken? I am not sure but I think there is a motor and a pump. I will check later to day. Thanks for the help.

 

[NCSERVICE]

if you have a system with a filter change it. you need to check the dump valves to make sure they are either engaged or tightened. if the unit has two big units one for each tire, with no hydrolic lines going anywhere then they are all one peice, which gives you less variables for trouble shooting... make sure that the input pulley set screws are tight. hydrolic componets usually carry a decent warranty i would check into that also

 

[1grnlwn]

Dump valve is probably loose. They are to open when you need to push a dead mower. They should be located on the pumps and will have either a t handle ot a large nut on top of the valve. Your manual should refer to them and show you where they are.

 

[indianamower]

ncservice,
I have a pump and motor for each wheel. I also noticed there appears to be a leak on the right motor. It is not very bad but there is build up of the oil, dirt and grass. the left motor is clean as a whistle. The dump valves are tight. I bought the mower used so I am sure there will not be any warranty to hope for. I am going to look into the leak on the right side. I think that is where the problem is. The hydro fuild and filter where changed out about 20 hours ago. When I bought the machine I did not think to look at the motors, everthing else looked great. I was aware of the pulling problem too. I just figured it could be an adjustment. Live and learn. I will figure it out. Thanks for all the help. Any ideas on a good place to get a new motor. I guess it could just be a seal that is leaking and causing low pressure??

 

[Ronbo]

I looked at the cub tank but changed my mind when the demo was sucking air, I asked about it and they said it happens a lot that may be your problem.

 

[cantoo]

indiananamower, there is an adjustment on the lever to keep them even.
Any idea how to purge the hydro system after changing the oil? I am having some problems and it appears that air is causing them.

 

[NCSERVICE]

indianamower have your dealer do a flow test on the hydro pump it would be worth your time and money, they will measure your hydrolic droop at two different pressures subtract the two droop readings and if it is with in a set parameter you have a good pump.

 

[redbull]

silly question, have you checked the dampeners? a bad dampener will make a unit do some weird stuff. before you start replaceing items (pumps) have the dealer run a FLOW TEST on the hydros. This test takes about an hour (to do right) but it will tell you if you indeed have a pump/wheel motor problem

 

[indianamower]

I will be checking into having the test ran. I am learning to deal with the problem but it would be great if I did not have to keep correcting the thing. I will be calling my dealer in the next few days. Thanks for all the input.
redbull, I am not sure what a dampener is. I am not real hydrolic savy.

I noticed the other day when I was mowing if I pull to make a tight right hand turn the right tire is not as quick to respond as the left is if I want to make the same turn going left?? Still wondering if it is just an adjustment that needs to be made. The hydrolic test seems like a good thing to have done. Thanks again!

 

[bob]

Originally posted by indianamower
I am not sure what a dampener is.

A damper is like a little shock absorber. It pushes the steering levers back into the neutral position.

 

[NCSERVICE]

Originally posted by bob
A damper is like a little shock absorber. It pushes the steering levers back into the neutral position.

You had the first part right, it does not center the steering lever though. usually thats done by a couple springs. the absorber dampens your input so that the controls arent sensitive or jerky.

 

[bob]

I stand corrected!