Hydrostatic vs. Manual pro's and con's
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Richard
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Re: Hydrostatic vs. Manual pro\'s and con\'s
Probably...
/forums/images/graemlins/crazy.gif
Probably...
/forums/images/graemlins/crazy.gif
Re: Hydrostatic vs. Manual pro\'s and con\'s
An awful lot depends on how much pressure the HST is set for. If you have an HST system that has pressure relief that is XX amount, it's going to hit relief when that pressure is met. A gear drive tractor is not going to stop at that point, but keep trying until the wheels are spinning. Of course, once the wheels are spinning, it makes no difference, but the wheels may not spin until you've gotten a little more done than you would have with the HST.
This is rather hypothetical, and some posters will state they don't hit relief that often when working, but I have.
I like both HST and shuttle shifts. There are times when both have the advantage, and obviously, it would be ideal if one could have both. I'd love a tractor that was mixed. I could use HST for those loading tasks, and mowing, and then when I want to do some serious plowing or pulling out trees etc. I could switch it over to shuttle, overriding the relief limitation.
I wouldn't think of getting rid of my HST tractor, but I'll probably add a shuttle shift tractor for those other jobs.
John
An awful lot depends on how much pressure the HST is set for. If you have an HST system that has pressure relief that is XX amount, it's going to hit relief when that pressure is met. A gear drive tractor is not going to stop at that point, but keep trying until the wheels are spinning. Of course, once the wheels are spinning, it makes no difference, but the wheels may not spin until you've gotten a little more done than you would have with the HST.
This is rather hypothetical, and some posters will state they don't hit relief that often when working, but I have.
I like both HST and shuttle shifts. There are times when both have the advantage, and obviously, it would be ideal if one could have both. I'd love a tractor that was mixed. I could use HST for those loading tasks, and mowing, and then when I want to do some serious plowing or pulling out trees etc. I could switch it over to shuttle, overriding the relief limitation.
I wouldn't think of getting rid of my HST tractor, but I'll probably add a shuttle shift tractor for those other jobs.
John
kensfarm
Veteran Member
Re: Hydrostatic vs. Manual pro\'s and con\'s
"An awful lot depends on how much pressure the HST is set for. If you have an HST system that has pressure relief that is XX amount, it's going to hit relief when that pressure is met. A gear drive tractor is not going to stop at that point, "
My experience when plowing,discing, or towing is that the engine bogs down or the wheels spin.. just like a gear tractor does when loaded.
Is there a pressure relief valve for the HST drive train system.. like the hydralics for the FEL?
"An awful lot depends on how much pressure the HST is set for. If you have an HST system that has pressure relief that is XX amount, it's going to hit relief when that pressure is met. A gear drive tractor is not going to stop at that point, "
My experience when plowing,discing, or towing is that the engine bogs down or the wheels spin.. just like a gear tractor does when loaded.
Is there a pressure relief valve for the HST drive train system.. like the hydralics for the FEL?
Re: Hydrostatic vs. Manual pro\'s and con\'s
</font><font color="blue" class="small">( Is there a pressure relief valve for the HST drive train system.. like the hydralics for the FEL? )</font>
Yes, there sure is. On my CK20, it's set for 240 bar. When pulling trees, I've often hit the limit. Sometimes I hit it when pulling the BB and grab some tough roots. Larger tractors generally have higher PRV settings and it won't be as noticable.
John
</font><font color="blue" class="small">( Is there a pressure relief valve for the HST drive train system.. like the hydralics for the FEL? )</font>
Yes, there sure is. On my CK20, it's set for 240 bar. When pulling trees, I've often hit the limit. Sometimes I hit it when pulling the BB and grab some tough roots. Larger tractors generally have higher PRV settings and it won't be as noticable.
John
JerryG
Super Member
Re: Hydrostatic vs. Manual pro\'s and con\'s
I don't know if you have read about the member that was here a couple of years ago with HST problems or not. He had his tractor in a hollow and the relief would blow and he couldn't get out. Maybe someone remembers what the name of the thread was, I don't. Seems like the had to get a dozer to pull him out.
I don't know if you have read about the member that was here a couple of years ago with HST problems or not. He had his tractor in a hollow and the relief would blow and he couldn't get out. Maybe someone remembers what the name of the thread was, I don't. Seems like the had to get a dozer to pull him out.
Re: Hydrostatic vs. Manual pro\'s and con\'s
</font><font color="blue" class="small">( <font color="blue"> My experience when plowing,discing, or towing is that the engine bogs down or the wheels spin.. just like a gear tractor does when loaded. </font> )</font>
Same here...if a relief is lifting before it breaks traction...something is wrong...
</font><font color="blue" class="small">( <font color="blue"> My experience when plowing,discing, or towing is that the engine bogs down or the wheels spin.. just like a gear tractor does when loaded. </font> )</font>
Same here...if a relief is lifting before it breaks traction...something is wrong...
SkyPup
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Re: Hydrostatic vs. Manual pro\'s and con\'s
Our HST will bury all four AG1's in 4WD right down to the frame with no problem.
Our HST will bury all four AG1's in 4WD right down to the frame with no problem.
Soundguy
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Re: Hydrostatic vs. Manual pro\'s and con\'s
</font><font color="blue" class="small">( He went to a NH 24 HP Boomer cupholder tractor FROM a JD A. There is a bit of difference in the newer gear transmissions than in the real old ones. )</font>
Yeah.. like no hand clutch!
Soundguy
</font><font color="blue" class="small">( He went to a NH 24 HP Boomer cupholder tractor FROM a JD A. There is a bit of difference in the newer gear transmissions than in the real old ones. )</font>
Yeah.. like no hand clutch!
Soundguy
timb
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Re: Hydrostatic vs. Manual pro\'s and con\'s
Um... isn't a power shuttle lever more-or-less in effect hand clutch? Thought about that one day when flipping directions - something along the lines of what was old is new again. /forums/images/graemlins/wink.gif
Um... isn't a power shuttle lever more-or-less in effect hand clutch? Thought about that one day when flipping directions - something along the lines of what was old is new again. /forums/images/graemlins/wink.gif
