520 hc transmission problems

[RITEK 25]

I have a hydrostatic wheel horse and most of the time it takes minutes to shift into reverse and yes it is full of oil so it's fine. I just picked this up I have no idea what the owner sis to it before.

[lynnmor 7,353]

Make sure that the drive belt and idler pulley are in good condition.  Check that the pulley on the transmission is not slipping.  If you have the belt disengagement device, check that it is in the correct position and is working properly.

 

I would drain the transmission and look at the oil to determine the condition of the transmission.  Replace the oil along with the correct filter.

[Handy Don 12,451]

Unless it's been terribly abused or has a ton of hours (2000 or so), the HC's transmission is quite strong.

 

Do you have the full range of motion on the control lever--does it go all the way forward and then all the way back in the slot on the "floor"? Or do you have the motion on the column (in this case you have to press downward on the motion lever and then pull back to make it go in reverse).

 

If still not ok then:

Get someone to look closely at the axles when you try to move to be sure they are solid in their hubs at both ends. I put a magic marker line across so I can see!

Get the belt cover off and look closely at the transmission pulley making sure it's not loose and spinning on the shaft. Same magic marker trick.

Get someone to sit on the tractor and work the motion while you look to make sure the pulley is not slipping on either the pulley or the transmission pulley when under load and that the tensioner is pulling it tight. (Seriously, this is NOT a good thing to attempt while on the tractor.)

Put the front frame of the tractor (not the hood!) up against something solid (a stout tree or a wall) and try to move forward--a tire should spin.

 

Jack it up and support the rear wheels off the ground (chock the front wheels).

Do the wheels spin in forward and reverse?

 

[RITEK 25]

30 minutes ago, Handy Don said:

Unless it's been terribly abused or has a ton of hours (2000 or so), the HC's transmission is quite strong.

 

Do you have the full range of motion on the control lever--does it go all the way forward and then all the way back in the slot on the "floor"? Or do you have the motion on the column (in this case you have to press downward on the motion lever and then pull back to make it go in reverse).

 

If still not ok then:

Get someone to look closely at the axles when you try to move to be sure they are solid in their hubs at both ends. I put a magic marker line across so I can see!

Get the belt cover off and look closely at the transmission pulley making sure it's not loose and spinning on the shaft. Same magic marker trick.

Get someone to sit on the tractor and work the motion while you look to make sure the pulley is not slipping on either the pulley or the transmission pulley when under load and that the tensioner is pulling it tight. (Seriously, this is NOT a good thing to attempt while on the tractor.)

Put the front frame of the tractor (not the hood!) up against something solid (a stout tree or a wall) and try to move forward--a tire should spin.

 

Jack it up and support the rear wheels off the ground (chock the front wheels).

Do the wheels spin in forward and reverse?

 

So I did what you said but its still doing that. Its more like 30 seconds but when its going into reverse it feels like the tranny it self is slipping inside. It has 1112 hours on it. The oil looks fine too.

[Handy Don 12,451]

1 hour ago, RITEK said:

So I did what you said but its still doing that. Its more like 30 seconds but when its going into reverse it feels like the tranny it self is slipping inside. It has 1112 hours on it. The oil looks fine too.

Please elaborate on exactly what you did and what happened. Step by step. A short video would be extremely helpful. Pictures, too.

 

Understand that inside the transmission, the only important difference between forward and reverse is that a valve shunts the pressurized oil forward or backward through the hydro motor. The transaxle (driven by the hydro motor) works identically in both directions. Slippage in one direction only is either an external issue or a seriously damaged hydro motor.

 

Good luck