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Now I have a Hydro question.


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#16 KennyP ONLINE  

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Posted March 04, 2015 - 05:41 PM

I have 2 Char-Lynn motors here and they only have the 2 hoses (That's why I was asking about the pump). I do not remember ever seeing a hyd. motor with 3.


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#17 Cat385B ONLINE  

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Posted March 04, 2015 - 05:43 PM

Couldn't remember if mine had one or not: (it didn't)

 

Kayla's Pics 8-2012 042.jpg


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#18 ol' stonebreaker OFFLINE  

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Posted March 04, 2015 - 05:44 PM

JDB is right. It's a drain for any internal leakage in the hyd motor. It can be teed into the return line from the valve body or directly to the tank. I will recommend putting a check valve on the return side of the motor in case someone accidentally and suddenly shifts the control lever from fwd to rev which may not do the mower drive components any good. It will also help you know if the quik connects are are hooked up right.
Mike
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#19 Auburn David OFFLINE  

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Posted March 04, 2015 - 05:50 PM

JDB is right. It's a drain for any internal leakage in the hyd motor. It can be teed into the return line from the valve body or directly to the tank. I will recommend putting a check valve on the return side of the motor in case someone accidentally and suddenly shifts the control lever from fwd to rev which may not do the mower drive components any good. It will also help you know if the quik connects are are hooked up right.
Mike

So I can just T it back into the return line? Thats great if I am understanding right!



#20 KennyP ONLINE  

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Posted March 04, 2015 - 05:54 PM

Couldn't remember if mine had one or not: (it didn't)

 

attachicon.gifKayla's Pics 8-2012 042.jpg

Cat, is there a plug in the back side of that motor. Can't tell from the pic.

 

JDB is right. It's a drain for any internal leakage in the hyd motor. It can be teed into the return line from the valve body or directly to the tank. I will recommend putting a check valve on the return side of the motor in case someone accidentally and suddenly shifts the control lever from fwd to rev which may not do the mower drive components any good. It will also help you know if the quik connects are are hooked up right.
Mike

Thanks Mike! It's nice to have someone 'show us the way' so to speak!


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#21 Auburn David OFFLINE  

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Posted March 04, 2015 - 05:56 PM

Cat, is there a plug in the back side of that motor. Can't tell from the pic.

 

Thanks Mike! It's nice to have someone 'show us the way' so to speak!

A plug?



#22 KennyP ONLINE  

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Posted March 04, 2015 - 06:16 PM

A plug?

Yeah! In Cat's pic above, there is something on the top side of there. Just wondering if that motor was like yours, just plugged on his machine.


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#23 gopher OFFLINE  

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Posted March 04, 2015 - 08:44 PM

Looks like it's a S&S motor. Go to their site with the size motor to make sure your flow rate doesn't over rpm your mower deck rating. 



#24 TUDOR OFFLINE  

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Posted March 05, 2015 - 04:02 AM

JDBrian has it correct. It's the case drain and it goes either to a 'T' in the return line from the control valves or direct to the reservoir.


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#25 Alc ONLINE  

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Posted March 05, 2015 - 06:26 AM

Brian & Bob , is the main reason for the drain line to relieve any excessive pressure built up making the quick couplers easier to connect ?  Most of our  trucks at work have quick couplers for hydraulic tools , one pressure  one return  and every so often they can't get the couplers to attach to the tools  without cracking the tool fitting to relive the pressure . Because I'm not there when they do it I'm not sure how/which fitting they removed first maybe causing the build up .



#26 TUDOR OFFLINE  

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Posted March 06, 2015 - 04:22 AM

Quick couplers have a check valve accessible for tapping with a hammer or hammer and bolt to release pressure in the lines. Don't get carried away. If you mushroom the check, it will either leak or not go together. It only takes a small spurt of fluid to release the pressure.

 

The case drain is to accommodate fluid which leaks internally to provide lubrication. Too much fluid build-up will cause pressure in the case which leads to cracking and external leaks.


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