Hi, This is my first post, as this looked like the most active late model tractor forum I could find. I have a JD 4700 Compact hydrostatic drive tractor. My question is this-the reverse speed is only about half that of the forward when the pedal is pressed all the way down. Is this the way they make them for safety? It is not such a problem, but I have been using the loader more lately, and it is becoming frustrating. I bought the tractor used about 3 years ago, but it has always been like this. I did look under the platform for linkage adjustment, but could not see anything obvious. Any help is greatly appreciated.
HST reverse speed adjustable?
- Thread starter terra66
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LBrown59
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BigE_
Platinum Member
Slower than normal speeds in reverse -- you probably picked up an ex-rental piece of equipment. They do this for safety reasons. I wouldn't be surprised if your loader valve was turned down as well so that you won't be able to lift as heavy of a load (also for safety reasons).
On mine, there is a bolt under the HST pedal to keep it from moving too far. This should be adjustable.
-Steve
On mine, there is a bolt under the HST pedal to keep it from moving too far. This should be adjustable.
-Steve
nmu98
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My 445 lawn tractor is the same way. I have been trying to change it for some time. Mine is limited by the pedal.
mwb
Platinum Member
I think you will find that most HST's will be a little slower in reverse; this is because of the design of the hydraulic motor. The design is optimised for best power and speed in one direction - and doesn't work as efficiently in the other.
My new Montana is slower in reverse, probably about 25% slower than forward.
Cheers,
mike
My new Montana is slower in reverse, probably about 25% slower than forward.
Cheers,
mike
schmism
Super Member
ive been told that on my TC33 the only reason it doesnt go as fast in reverse as fwd as there is a limiting stop (bolt head) that keeps the pedal from moving farther backward. should you elimiate the stop, it would go just as fast backward as forward.
mjncad
Super Member
I just took a look at my shop manual for the 4200 - 4400 series of tractors and the max ground speeds for each range were identical regardless of direction.
Therefore I have to assume the same is true for the 4700. Also, I seem to recall that there should be a speed decal on the fender next to the range selector lever.
As others have said, you may have gotten a unit that was originally a rental and someone messed around with the inner workings to make the lawyers happy.
Therefore I have to assume the same is true for the 4700. Also, I seem to recall that there should be a speed decal on the fender next to the range selector lever.
As others have said, you may have gotten a unit that was originally a rental and someone messed around with the inner workings to make the lawyers happy.
patrick_g
Elite Member
When new, my Kubota Grand L 4610HSTC was (subjectively, I didn't use a stop watch) as fast backwards as forwards and was a true delight doing loader work.
My fuel tank developed a leak in the seam (well out of warranty) and Kubota sent my dealer a replacement for free. I paid R&R labor. Seems that when they built this little cab tractor they started with a fuel tank and built a tractor around it. They had to remove the cab and basically disassemble the tractor to change the tank. Subsequent to this fuel tank R&R my reverse speed was less than 1/2 my forward speed and slow enough to be a PITA when maneuvering. Two trips back to the dealer later and they have no clue apparently but tractor still backs slower than going forward, although not 1/2 but probably 3/4.
This is the single greatest negative factor regarding my tractor. I use my tractor hard and a slow reverse speed is a true PITA. Sure you can shift to a higher gear but first you have to come to a complete stop so that ends up taking more time that just backing slowly in many back and fill maneuvers. Having to stop to shift gears over and over and over and over when doing FEL work is totally unacceptable and stupid.
When I get to a lull in my tractor use I will take to to dealer "B" and see if their mechs can get it right.
There is nothing wrong with having equal forward and reverse speeds with a hydrostat. It is a GOOD thing.
Pat
My fuel tank developed a leak in the seam (well out of warranty) and Kubota sent my dealer a replacement for free. I paid R&R labor. Seems that when they built this little cab tractor they started with a fuel tank and built a tractor around it. They had to remove the cab and basically disassemble the tractor to change the tank. Subsequent to this fuel tank R&R my reverse speed was less than 1/2 my forward speed and slow enough to be a PITA when maneuvering. Two trips back to the dealer later and they have no clue apparently but tractor still backs slower than going forward, although not 1/2 but probably 3/4.
This is the single greatest negative factor regarding my tractor. I use my tractor hard and a slow reverse speed is a true PITA. Sure you can shift to a higher gear but first you have to come to a complete stop so that ends up taking more time that just backing slowly in many back and fill maneuvers. Having to stop to shift gears over and over and over and over when doing FEL work is totally unacceptable and stupid.
When I get to a lull in my tractor use I will take to to dealer "B" and see if their mechs can get it right.
There is nothing wrong with having equal forward and reverse speeds with a hydrostat. It is a GOOD thing.
Pat