Tractors4u
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- Deere 4310, Kubota L355, John Deere SST18 Spin Steer, 2006 Polaris Ranger
Grimreaper how did you change your User ID?
HST Transmission
- Thread starter yooperdave
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art
Super Member
When the tractors are shut off the hydraulic system is still charged. After some time they do drain out and then your tractor can be rolled. What ever you do, don't tow it unless the range lever is in neutral. More people ruin hydro's from towing them then use will. The hydraulic pump to charge the system only runs off the engine so it is not working when being towed and the parts dry up real quick!
MossRoad
Super Moderator
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- Power Trac PT425 2001 Model Year
Yeah, I know... there is no physical connection(hence, the smirkey face /forums/images/graemlins/smirk.gif). There is a bypass pedal that you can push with your heel when starting the engine. This takes the load off the pump so the engine can crank without having to push the hydraulic fluid. If you don't push that pedal, especially in cold weather, the starter isn't going to turn fast enough to start the engine.
And if the range selector is in neutral, the unit can roll with the engine off. That's why I park it in low range with the parking brakes set and the bucket down. As long as the range selector is engaged, you can't move the unit when the engine is off.
From the little experience I have, I have found that the HST in this old International Harvestor runs very warm when under constant load. If I am doing loader work, it runs much cooler as I am constantly changing speeds and directions. Completely unscientific observation, but just what I have noticed.
And if the range selector is in neutral, the unit can roll with the engine off. That's why I park it in low range with the parking brakes set and the bucket down. As long as the range selector is engaged, you can't move the unit when the engine is off.
From the little experience I have, I have found that the HST in this old International Harvestor runs very warm when under constant load. If I am doing loader work, it runs much cooler as I am constantly changing speeds and directions. Completely unscientific observation, but just what I have noticed.
art
Super Member
Can't say that when things are being used that they won't make heat. Many of the new tractors today you have to be careful when checking the fluid because of the heat.
MossRoad
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- Power Trac PT425 2001 Model Year
Yes, my owner's manual gives very specific instructions on towing this unit. You also have to add quite a bit of hydraulic fluid before you tow it, then drain it back down to operating level before running it again.
Someting else that was mentioned was creeping. Mine will creep when the pedals are centered... sometimes. Sometimes it will not. This is dangerous. I don't think the thing is out of adjustment, I think it is worn out. And I don't think I will ever put any money into it, as the re-sale value is so low. I will just drive it into the ground, then turn it over to the salvage guy. Parts are very hard to locate for late 70's HST IH tranny, or so they tell me at the repair place. Of course, I don't know if the tranny will ever give out. It hasn't yet. /forums/images/graemlins/tongue.gif
I haven't run it for a few years. I need to get it out of my garage. Fluid/fliter changes and such... bad tire stems on fluid filled tires, too. Yucky mess to deal with. Hopefully it is just the valves and not the stems. The tires are huge and I don't think I could safely move them myself, etc... lots of work and more important things to do, like kid's basketball games, cheerleading, ice fishing and surfing TBN! /forums/images/graemlins/laugh.gif
Someting else that was mentioned was creeping. Mine will creep when the pedals are centered... sometimes. Sometimes it will not. This is dangerous. I don't think the thing is out of adjustment, I think it is worn out. And I don't think I will ever put any money into it, as the re-sale value is so low. I will just drive it into the ground, then turn it over to the salvage guy. Parts are very hard to locate for late 70's HST IH tranny, or so they tell me at the repair place. Of course, I don't know if the tranny will ever give out. It hasn't yet. /forums/images/graemlins/tongue.gif
I haven't run it for a few years. I need to get it out of my garage. Fluid/fliter changes and such... bad tire stems on fluid filled tires, too. Yucky mess to deal with. Hopefully it is just the valves and not the stems. The tires are huge and I don't think I could safely move them myself, etc... lots of work and more important things to do, like kid's basketball games, cheerleading, ice fishing and surfing TBN! /forums/images/graemlins/laugh.gif
MossRoad
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- Power Trac PT425 2001 Model Year
<font color="blue"> Can't say that when things are being used that they won't make heat. Many of the new tractors today you have to be careful when checking the fluid because of the heat. </font>
Oh, I know... it's just an observation that it gets very warm when under constant load, like driving at the same speed for a few hours while running the brushhog. It runs much cooler when moving back and forth, like doing loader work or hauling brush and trees around or box scraping. This was something that Doc mentioned and I tend to agree, just from my own non-farming experience. It has no temp gauge on the tranny fluid, so how hot it gets, I don't know. It just becomes unbearable in the cab while brush hogging, but not bad when doing other tasks.
My new PT425 is much smaller and it will heat up, too. You don't want to mess with the quick connects without gloves right after running the mower... you'll burn yourself on the hot metal. I'd like to get a temp gauge for the hydraulics, but the only ones I've seen are pretty expensive.
Anyone have any leads on reasonably priced hydraulic temperature gauges?
Oh, I know... it's just an observation that it gets very warm when under constant load, like driving at the same speed for a few hours while running the brushhog. It runs much cooler when moving back and forth, like doing loader work or hauling brush and trees around or box scraping. This was something that Doc mentioned and I tend to agree, just from my own non-farming experience. It has no temp gauge on the tranny fluid, so how hot it gets, I don't know. It just becomes unbearable in the cab while brush hogging, but not bad when doing other tasks.
My new PT425 is much smaller and it will heat up, too. You don't want to mess with the quick connects without gloves right after running the mower... you'll burn yourself on the hot metal. I'd like to get a temp gauge for the hydraulics, but the only ones I've seen are pretty expensive.
Anyone have any leads on reasonably priced hydraulic temperature gauges?
JerryG
Super Member
I don't know, but I would say that any automotive or truck transmission temperature gauge would work. But the big if is if you could find a place that it would fit.
_RaT_
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- Kioti 3510-SE HST
Jerry, my first time using hydraulic shuttle shift always involved the clutch. I had no operators manual and the owner of the tractor, a Kubota L4850 did not know either. After using it a few hours, I began to get it through my head that this thing is going to forward and reverse so smooth that I'm going to try shifting the shuttle with no clutch. The rest is history and the wet shuttle clutch works very, very well. This is true unless I'm in reverse still rolling backward down hill and engage to forward, then there is some rough jerking, same with our NH 2120 shuttle. I also have a International with a manual but with a 3 puck ceramic clutch and while it is not a shuttle, does have just about the easiest F/R shifting I have seen on a manual. I have a soft spot for it, it's a massive chunk of iron and gobs of power in a 179 cu inch 3 cylinder diesel. Rat...
Libertine
Gold Member
_RaT_:
<font color="blue">That viscous coupling is precisely one of the reasons why the HST does what it does so very well. I look at parking a tractor on a hill with the engine off a job well done by the parking brake. </font>
Like most things in life, there are pros and cons. If you're dragging something heavy up a hill and the engine quits on you, you could be in deep doo doo. In fact one guy posting on this site had that happen to him - almost got wiped out. The reason I posted what I did was not to suggest that HST's were "no good." It was in response to Tractors4u's comment about the fact many of the pro-HST guys seem to take an almost religious fanaticism about them. If someone said something like "I realize there are aome safety issues with HSTs, they are power robbers and cost more fuel to operate, but, their benefits "for me", such as infinitely variable speeds, etc. etc., are worth the costs" I would have no objection to that. Its the lack of balance, especially those who tout the HST to new tractor people as the end-all be-all WITHOUT offering an explanation of the risks/costs etc.
That's all. I've used HST stuff and for some types of things I would buy one. But, FOR ME (not for everyone) they arn't worth the money/safety risks/ etc. But that's just me.
We're not supposed to talk politics, but do you like your new governor??????
JEH
<font color="blue">That viscous coupling is precisely one of the reasons why the HST does what it does so very well. I look at parking a tractor on a hill with the engine off a job well done by the parking brake. </font>
Like most things in life, there are pros and cons. If you're dragging something heavy up a hill and the engine quits on you, you could be in deep doo doo. In fact one guy posting on this site had that happen to him - almost got wiped out. The reason I posted what I did was not to suggest that HST's were "no good." It was in response to Tractors4u's comment about the fact many of the pro-HST guys seem to take an almost religious fanaticism about them. If someone said something like "I realize there are aome safety issues with HSTs, they are power robbers and cost more fuel to operate, but, their benefits "for me", such as infinitely variable speeds, etc. etc., are worth the costs" I would have no objection to that. Its the lack of balance, especially those who tout the HST to new tractor people as the end-all be-all WITHOUT offering an explanation of the risks/costs etc.
That's all. I've used HST stuff and for some types of things I would buy one. But, FOR ME (not for everyone) they arn't worth the money/safety risks/ etc. But that's just me.
We're not supposed to talk politics, but do you like your new governor??????
JEH