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#16 olcowhand OFFLINE  

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Posted August 23, 2014 - 03:48 PM

I was going to change the fluid and filter after my wife goes to work . should I use motor oil like the manual say or ATF . getting conflicting info from other sites

 

I would use motor oil.  The thicker viscosity helps these older units.  


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#17 fogler12538 OFFLINE  

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Posted August 23, 2014 - 06:25 PM

Changed the fluid and filter, still no movement. I can hear the pump when I use the lift cylinder also when I try to go forward and backwards. I guess I'll have to take a bunch of tin off tomorrow to get at the freewheel valve.

#18 Cvans ONLINE  

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Posted August 23, 2014 - 06:47 PM

Have you checked to see if there is a pickup screen on that hydro?


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#19 olcowhand OFFLINE  

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Posted August 23, 2014 - 06:52 PM

I think the lift circuit should still work even if the freewheel valve is open.  Might be the screen like Chris said.  I've seen them get completely mucked up solid with a scummy buildup.


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#20 fogler12538 OFFLINE  

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Posted August 23, 2014 - 06:58 PM

Can either of you point me in the right direction to find that. I'm a carpenter not a mechanic and it's frustrating

#21 olcowhand OFFLINE  

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Posted August 23, 2014 - 07:00 PM

Can either of you point me in the right direction to find that. I'm a carpenter not a mechanic and it's frustrating

 

I can't, as I'm not that familiar with Wheel Horse.  Brian can though (texas deere&horse).


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#22 Cvans ONLINE  

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Posted August 23, 2014 - 07:19 PM

I can't either but I'm just about certain my friends quit moving and the screen was plugged. Works fine now as my son bought it from him.   


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#23 fogler12538 OFFLINE  

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Posted August 23, 2014 - 07:20 PM

I don't know if this is worth mentioning but I have no trouble moving it . Coming off the ramp thurs night in the dark it took off like a rocket towards the apple orchard next door , which would have been bad so I turned left behind the garage which has a steeper incline , then left again up towards the house when it stopped . Almost bailed off when it was headed towards the pond . Anyway I had to check my shorts after that .Forgot to mention no brakes either.


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#24 Cvans ONLINE  

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Posted August 23, 2014 - 08:09 PM

I take it you mean it was coasting during this runaway. If that's the case I would look into getting that "free wheel" valve working. 


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#25 fogler12538 OFFLINE  

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Posted August 23, 2014 - 08:23 PM

It was coating alright . going to try and get at that tomorrow

#26 coldone OFFLINE  

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Posted August 23, 2014 - 08:35 PM

The free wheel valve would be my first concern. If you still have the old oil, run a magnet through it and see if there are any shavings. The pickup screen is attatched to the hydro motor. The hydro motor is attached to the transaxle. Its not too hard to remove but it aint fun at all.

 

The brakes for most of the D series is the hydro system itself. Later models did get a friction brake added. If the tow valve is open then you got no brakes. The hydro system in the D series is a little unique, it is called a divorced system. Most hydros have the pump and motor physically connected together as a unit. The divorced system has the pump and motor seperate from each other with the only physical connection being the "manifold". The manifold is 4 steel tubes that are just for the fluid to move from the pump to the motor and back. The actual hydro system is a slightly modified sundstrand 15 series hydro. So any manual you find for the Sundstrand 15 will give you a general idea of how it works.The wheel horse C series uses the same hydro as the D series but its not "divorced" the pump and motor are physically bolted together and bolted to the transaxle.


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#27 coldone OFFLINE  

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Posted August 23, 2014 - 08:42 PM

Here is the general service manual for the B,C,D series. Section 5 starts in on the hydro system for the Ds.

http://gardentractor...e-manual-vol-1/


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#28 fogler12538 OFFLINE  

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Posted August 23, 2014 - 09:13 PM

Freewheel valve I might be able to handle but the pickup screen is way over my head

#29 Cvans ONLINE  

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Posted August 23, 2014 - 09:50 PM

Just to bolster your spirits, I doubt my friend had ever worked on a GT before either.  :thumbs:


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#30 fogler12538 OFFLINE  

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Posted August 24, 2014 - 05:50 AM

The only thing I can find that resembles some sort of screen is the strainer which is number 33 . As far as the push valve , should I take it out when I get to it?

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