HST Just Won't Stop, Quit, Woah!

[yellowsocks93]

Re: HST Just Won\'t Stop, Quit, Woah!

I was just using the automatic car as an example(not really mechanically related as you said and I did not mean they were mechanically related) because you are putting extra strain on the car when you do that. I do know that hydros use a pump and have a motor to move the fluid around to power the wheels. Wouldn't the trans fluid heat up very quickly if you were stepping on the reverse pedal going forward since the fluid would have to go into the relief valve as stated earlier? Maybe I just thought wrong but I did not think it was good to change direction while moving even with a hydro or power reverser so I am sorry if I came off as a know it all. I don't know everything about tractors and I don't know if I come off like I try to. I just like to state the experiences I have had since I have been around them for a few years. All geared machines though. /forums/images/graemlins/grin.gif Could you check your manual to see if it mentions a warning about stopping before changing direction while moving forward? Also for the JD recall it does not say to step on the opposite pedal but rather to reduce engine speed to idle and shut off the engine.

 

[Egon]

Re: HST Just Won\'t Stop, Quit, Woah!

Endurance and longgevity of equipment often rely on a soft touch on the controls.

Egon

 

[jinman]

Re: HST Just Won\'t Stop, Quit, Woah!

</font><font color="blue" class="small">( I would not hit the reverse pedal while traveling forward. You may break something. Try hooking your foot under the front of the forward pedal to lift it up. )</font>

</font><font color="blue" class="small">( Also for the JD recall it does not say to step on the opposite pedal but rather to reduce engine speed to idle and shut off the engine. )</font>

Nick, I put a quote from your first post on this topic because you mentioned hooking your foot under the forward pedal. On a New Holland tractor, there is no difference between that action and stepping on the reverse pedal. It produces exactly the same motion of the pedal mechanism. There is only one shaft that goes from the pedals into the transmission and that shaft rotates clockwise to produce forward motion and counterclockwise to produce reverse motion. Stepping on the opposite pedal is the exact thing that should be done if the pedals stick in one direction or the other. The first time it happened to me, I automatically stepped on the brake pedal, but quickly discovered that didn't work. Just a tap on the reverse pedal stopped the tractor.

I'm not sure what JDs problem is with the hydro pedals, but their instruction to reduce the engine speed to idle and shut off the engine is probably due to a broken component or something binding which will not let the pedals come to neutral position. By reducing the engine speed to idle, movement of the tractor is reduced to minimum and will not overstress the transmission if the engine is shut down.

In the case of the Class III New Holland Boomers, the pedal mechanism is prone to collect dust and especially when the tractor is new, it may cause the pedal motion to be sluggish. There is no mechanical failure, but only the lack of free, smooth motion. To say "step on the pedal" surely doesn't mean "stomp the pedal in a panic reaction." As Egon pointed out, smooth and easy movement is always the best. Of course, if you are about to run over your barn or your new pickup truck, smooth movements may give way to a panic reaction. /forums/images/graemlins/shocked.gif

Lastly, most of our tractors move really slowly in comparison to cars or other vehicles. Most of the time when I move my foot from the forward to reverse pedal, the tractor completely stops as I lift my foot off the forward pedal. It just happens very quickly because filling the FEL bucket with dirt is measured in inches rather than miles-per-hour. Backing my rotary cutter into some brush is also done very slowly. On the other hand, if I were driving down the road at top speed (around 19 mph) and suddenly tried to change direction, that would be very foolish. Instantly changing directions is something done at very slow speeds and is a common occurance with hydrostatic transmissions.

It just happens that I and many others who own New Hollands are very familiar with the minor problem Mike (Pineridge) had with his TC40D. I am making no suggestion whatsoever regarding the John Deere transmission problem. I sure am interested in finding out what their problems turns out to be, though. Do you know if it is internal to the transmission or if it is a pedal/linkage problem?

 

[PineRidge]

Re: HST Just Won\'t Stop, Quit, Woah!

Jim it doesn't sound like linkage problems with the JD HSTs as the posts that I have read mention change out of the HST itself. /forums/images/graemlins/frown.gif That sounds like an internal flaw to me. Otherwise they would be making a repair not a replacement. You might want to drop in on the JD forum and browse.

 

[yellowsocks93]

Re: HST Just Won\'t Stop, Quit, Woah!

I don't know about the JD problem that well. Ok, I was wrong about the hydro pedals and the whole thing. Just as long as you guys are not going down the road at 10 miles an hour and trying to change direction. Oh one more thing. On the JD 400 series garden tractors they have a really slow reverse speed so I hooked my foot under the forward pedal and it went back faster than just pressing on the reverse one. I kind of forgot about that.

 

[Old_Hickory]

Re: HST Just Won\'t Stop, Quit, Woah!

I have used my JD all day in continually a forward and motion repetition. I am going forward and I need to go back,I just switch my foot from the forward pedal to the reverse pedal,I am not thinking about the tractor stopping,I am just thinking about it going in the other direction and my foot follows suite.
In other words I do not consciously wait for the tractor to stop before moving my foot to the other pedal,where as if I was driving an automatic truck/car I consciously wait for the vehicle to stop moving before I switch gears,so I will not damage the transmission.

 

[PineRidge]

Re: HST Just Won\'t Stop, Quit, Woah!

Old Hickory I think that a lot of guys don't know that a hydro was made to quickly change direction without creating problems. This is exactly the reason I sold my gear drive unit and went to the hydro as I find it much easier to change direction without even needing to take my hands off the wheel or FEL joystick. It's even nicer when you are pushing into a pile of dirt with the FEL bucket and your RPMs start to drop off, at that point you can do an automatic downshift by tapping the turtle button built into the D model FEL joystick to keep the power curve up.

I think short of running flat out wide open in range 2 and immediately kicking it in reverse, it would really be hard to mistreat a HST. I have only had mine for 91 hours but I am already a believer.

 

[yellowsocks93]

Re: HST Just Won\'t Stop, Quit, Woah!

Being a gear guy myself I think I could really benefit from using a hydro more often. It's very nice when doing manuvering work for picking up an attachment then I would not have to keep pushing in the clutch or riding it somewhat to keep a slower speed when already in the lowest gear and range.

 

[jinman]

Re: HST Just Won\'t Stop, Quit, Woah!

Yeah, Mike. I did check the JD forum and it sounds pretty rough for the 4000 ten series owners. The bad news is that the problem is internal and serious. It's so serious JD is asking owners not to use their tractors. The good news it that JD is taking the responsibility and recalling all those tractors to fix the problem.

Back in 2001 when I got my tractor, there was a recall of Class III Boomers because the transmission could jump out of high or low range to neutral while you were travelling downhill. It required splitting the tractor to fix. I don't think it was a hydrostatic problem, but rather a gear problem. I'm not sure since I was one of the lucky ones who was not affected by the NH recall.

 

[PineRidge]

Re: HST Just Won\'t Stop, Quit, Woah!

Jim a tractor that managed to pop into neutral on its own going downhill would indeed be a real problem to handle. Especially if that same scenario happened in the thick woods. Glad that recall has long been taken care of.

When I read about the JD recall I felt sad for the guys that were affected. Even though JD will be making their problems right a recall is not a pleasant situation. There is always concern that the recall might be extended like Firestone did with their tires some years back.

I have gone through several recalls myself for minor annoyances such as ignition switches and tires on vehicles that I have owned in the past. But with an automobile at least you are able most of the time to drive it to the dealership for the repairs.

Merry Christmas To All