B 2620 reverse pedal sticking.

[gregrocky]

I own a 2010 B 2620 117 hrs and the reverse pedal sticks when its mostly cold out. Anybody else having this problem? I know about the grease fitting underneath. Didn't work. I haven't called the dealer yet, but thats my next step if I don`t get good info from this web site. Thank you in advance.

 

[WaxMan]

If its anything like my B3030 there is a switch, a lever and a adjustment for neutral.
I hit a rock and bent the switch bracket and it would not stay in neural. It would stick forward and reverse until I straighten the bracket out. While I was under there I saw how it worked. Maybe the lever is bent just a little and touching when in reverse. May not be the case on yours since yours only does it while cold but worth a look. While under there move the pedal back and forth while watching it.

 

[tractchores]

There is also a grease fitting under the deck behind the pedal pivot point. If only happens when cold try to get new clean grease and maybe lighter grease in there.

 

[DieselDon]

I have the same tractor and have had a few minor bouts with it sticking. Sometimes its a bit freaky when the tractor keeps going. Can't be too huge of an issue though and I'll probably take the advice of an earlier poster. Get underneath and loosen some things up with grease and spray.

 

[ericher69]

Yup

Pretty scary the first time as the tractor kept barreling down towards a garage door!

Almost wrecked the panel with the 5' blade

Back to normal in warmer weather

 

[Notforhire]

I own a 2010 B 2620 117 hrs and the reverse pedal sticks when its mostly cold out. Anybody else having this problem? I know about the grease fitting underneath. Didn't work. I haven't called the dealer yet, but thats my next step if I don`t get good info from this web site. Thank you in advance.

I have a NH TC40D that will do the same thing. It is normal, at least for New Hollands, to act like that if they arn't throttled up enough. For an explanation of why this happens you will need to talk to someone smarter than me. You can try jinman on the TBN NH owner operator. He is a bright guy, and knows how hydrostats work.
Tractors like mine, need to be turning around 1500-2000rpm to work correctly. When the trans oil is cold and thick it is more of a problem. I changed to Amsoil syn. hyd-trans. fluid, and the cold weather operation improved.
I would imagine there isn't much of a design difference in Hydro drives, if they are NH or Kubota.

Good luck, Bill

 

[Notforhire]

I did find this on the NH site, the OP had the same problem;

"There's one thing that has not been mentioned in this post that I think is important. An HST uses hyd. pressure called charge pressure. It uses it for lubrication and to kind of keep things together so to speak. The charge pressure also acts as an internal spring to help return the swash plate to neutral. The charge pressure changes with the rpm of the engine as the charge pump is driven directly by the engine. When the rpm is low, the charge pressure is low, compared to when the engine is at a higher rpm, and flow is also affected. If you are running the engine at lower rpms with a load (going up a hill), the "hyd return spring" is not as strong, hence the HST not returning to neutral. All of the other points (the external spring and lubing piviot points) are right on, but the rpm does play a role in the equasion. Unfortunately, the problem is the nature of the beast to an extent, but can be dealt with." /forums/images/graemlins/smirk.gif

I hope that explanation helps.

Bill

 

[BrierPatch]

I did find this on the NH site, the OP had the same problem;

"There's one thing that has not been mentioned in this post that I think is important. An HST uses hyd. pressure called charge pressure. It uses it for lubrication and to kind of keep things together so to speak. The charge pressure also acts as an internal spring to help return the swash plate to neutral. The charge pressure changes with the rpm of the engine as the charge pump is driven directly by the engine. When the rpm is low, the charge pressure is low, compared to when the engine is at a higher rpm, and flow is also affected. If you are running the engine at lower rpms with a load (going up a hill), the "hyd return spring" is not as strong, hence the HST not returning to neutral. All of the other points (the external spring and lubing piviot points) are right on, but the rpm does play a role in the equasion. Unfortunately, the problem is the nature of the beast to an extent, but can be dealt with." /forums/images/graemlins/smirk.gif

I hope that explanation helps.

Bill

Interesting info. My 2620 has only done it maybe 3 times in 155hrs and I have been pretty good about greasing the pivot shaft. I will have to pay more attention next time and see if it is doing it whith the rpm's low.

:thumbsup:

 

[Notforhire]

Interesting info. My 2620 has only done it maybe 3 times in 155hrs and I have been pretty good about greasing the pivot shaft. I will have to pay more attention next time and see if it is doing it whith the rpm's low.

:thumbsup:

My pedal will stick on myTC40D if I climb my driveway at 1200rpm. If I push it up to 2000rpm there is no problem.
This is one reason that I am going back to a manual trans.
While running at higher rpm solves the trans. problem, it tends to make operating the loader smoothly more difficult, unless I keep readjusting the throttle.
I don't know if the weight of the machine has any influence on this, but I here more about it in the larger hydros.
I read somewhere on TBN that Kubota improved their hydro system for the Grand L, so it is less prone to the sticking problem, while the less expensive units still use the old system. How true this is I don't know.

Bill

 

[wowwee]

My B2320 does this also. I see in the parts diagram there is a dampener in the linkage. I'm thinking the dampener, basically a shock absorber, gets stiff in cooler weather. Maybe they could have chosen a to put a different viscosity fluid or maybe a silicone based oil in this. Someday I'm going to get into mine a little deeper and play with it, see if I can improve it.

Dale