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New to Me 318 Bad hydro


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#1 Medicjj OFFLINE  

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Posted August 30, 2011 - 07:20 PM

Just got a 1989 318 for very litle money. I bought it for the motor to fix my 317. After compairing the two I think I'll repair the 318. Motor runs good Hydraulics and steering work. The transmission has presssure at relief valves but it will not move. I need to know what transmissions will work. Thanks for any help as I'm new to this Forum.

#2 JDBrian OFFLINE  

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Posted August 30, 2011 - 07:42 PM

Welcome to GTTAlk and congratulations on the 318. If you look in the manuals section of this forum there should be a service manual for the 318. You can download the manual. I'm not sure if the same transmission is used in any other tractor. Have you checked the linkage to make sure it is actually moving the speed adjustment input on the hydro? The service manual has troubleshooting info for the transmission.
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#3 Trav1s ONLINE  

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Posted August 30, 2011 - 07:51 PM

The same hydro was used on the following tractors beginning with:

120 in 1970/71
140 in 1972 IIRC
300
312
314
316
316k
317
318
322
330/332

That being said I would expect your best place to find a good used one is in the older tractors like the 300, 316k, 314 and 317. The 120/140 would work but there is a strong collector following of those machines.
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#4 bhts OFFLINE  

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Posted August 30, 2011 - 07:55 PM

First welcome to the forum.First are you sure the rearend is bad? I have seen them where the steeing and lift worked but at some point it was pulled to fast and destoyed the pump. Next you are in luck i am parting a 318 out right now with a good rearend and pump.You do not need to buy a complete rearend just the center section if it is a bad rearend.As far as what will fit it the 322,332,420,430 and i belive a couple more that i don't remember will fit.If you use the 420 or 430 center section they allow two speeds and the 430 will also alow diff lock. But you will need the linkage for the 2 speed and diif lock and some mod to the fender pan to allow there use.If i remember right you will need your axle halfs from your rearend.
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#5 bhts OFFLINE  

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Posted August 30, 2011 - 07:57 PM

The same hydro was used on the following tractors beginning with:

120 in 1970/71
140 in 1972 IIRC
300
312
314
316 kohler
317


That being said I would expect your best place to find a good used one is in the older tractors like the 300, 316k, 314 and 317. The 120/140 would work but there is a strong collector following of those machines.



Sorry those will not work as the input and output shaft on the 318 is splined and those are round

#6 Medicjj OFFLINE  

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Posted August 30, 2011 - 09:32 PM

Thanks! All linkages move and the pump makes the right sounds. I think the motor side of the hydro is toast from someone pulling it. I downloaded the manuals. I guess I'll tear it down and find out what I need.

Edited by Medicjj, August 30, 2011 - 10:39 PM.


#7 JDBrian OFFLINE  

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Posted August 31, 2011 - 06:47 AM

Let us know what you find. Those hydros are pretty tough. If it was overheated or run without fluid that could have done it in. The relief valves will prevent it from overloading unless someone bypassed them. I'm curious to know what has caused the failure.

#8 Trav1s ONLINE  

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Posted August 31, 2011 - 08:34 PM

Sorry those will not work as the input and output shaft on the 318 is splined and those are round


My bad... I missed the splined-shaft variable in my reading.

#9 MH81 OFFLINE  

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Posted August 31, 2011 - 08:41 PM

Looks like you are in very capable hands, just stopped by to say
:welcometogttalk: and :wewantpics:
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#10 Medicjj OFFLINE  

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Posted September 16, 2011 - 04:57 PM

Thanks to BHTS and a used hydro unit it will now travel under it's own power. The old unit had a frozen motor side. I promise to post some pitcures wwhen I get the camera working. You would think that a person that only works 10 days month would have more time to work on tractors. Thanks agin for all the help.

#11 dsdillner OFFLINE  

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Posted September 17, 2011 - 07:20 AM

Just a quick comment to make sure you know about the Hydro lock out. There is a lever to allow you to roll the tractor around without running. Are you sure this is not in relief position? Probably you already know this but hey worth asking? It is under the right hand side of fender. Dan
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#12 Medicjj OFFLINE  

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Posted September 17, 2011 - 06:52 PM

100_0164.jpg Looks rough but cuts good.:D

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#13 KennyP OFFLINE  

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Posted September 17, 2011 - 07:08 PM

A little TLC and she'll be good as new.

#14 bhts OFFLINE  

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Posted September 17, 2011 - 07:26 PM

Thanks to BHTS and a used hydro unit it will now travel under it's own power. The old unit had a frozen motor side. I promise to post some pitcures wwhen I get the camera working. You would think that a person that only works 10 days month would have more time to work on tractors. Thanks agin for all the help.



Glad it is up and going and hope that pump gives you many hours of enjoyment.
Thanks for the business :thumbs:
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#15 JDBrian OFFLINE  

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Posted September 18, 2011 - 06:24 AM

Good to hear you have it moving again.




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