Kubota Transmissions
- Thread starter Dissolute
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texasjohn
Super Member
Try checking out this site... for a great discussion of transmission differences.
texasjohn
Super Member
Also, this TBN discussion of HST shows that it takes some explaining.
My net is that, for me, HST, is superb... I don't do much plowing but lots of general use of the tractor around the ranch. Try driving both and it may help you understand the differences.
My net is that, for me, HST, is superb... I don't do much plowing but lots of general use of the tractor around the ranch. Try driving both and it may help you understand the differences.
Muleskinner
Gold Member
The mechanical shuttle uses a dry single disk clutch plate. The hydraulic shuttle uses a wet "Multi disk" clutch pack housed inside of the transmission. The latter is MUCH stronger and less apt to wear out.
texasjohn
Super Member
You talk about shifting a selector on the column... no clutch depression. I familar mainly with my Kubota 5030 HST and will describe how it works... in practical terms. I don't know exactly what selector is on the column of the tractor you are referring to.
First, I decide which speed/gear/power I need to use and set the manual gear selector under my left hand... high or medium or low. Gotta use the clutch for this and be stopped.
Then while stopped, I set the RPM's using the column RPM stick.... I most usually run at 1500 when doing light/medium work.. more or less RPMs as the situation warrants.
Then, the tractor is ready to move... there is a rocker pedal under the right foot... rock it forward slightly to move forward slightly... rock it back with the heel of the shoe and forward motion will stop and it will reverse. Return to neutral and motion will quickly slow to a stop.. unless on significant incline it will not slip or creep... no clutch needed. The amount of forward/reverse depression of the foot pedal adjusts the forward/reverse speed... all within the same RPM setting. More forward/down means faster forward. More reverse/down means faster reverse. All this is without hitting the clutch.
This means you can (with practice) drive right up into a pile of sand with the FEL, and with continuous motions fill the FEL and start your reverse motion... all with no clutch and only rocking your foot forward or back... then speed forward to the point to dump it... let up on on the toe presssure while using the FEL to dump the load... and hit the reverse heel rocker and back away, turn and proceed forward to the sand pile again.
Bottom line is that I can do this a lot in one day and not get a tired leg from pressing the clutch.
Hope this helps.
First, I decide which speed/gear/power I need to use and set the manual gear selector under my left hand... high or medium or low. Gotta use the clutch for this and be stopped.
Then while stopped, I set the RPM's using the column RPM stick.... I most usually run at 1500 when doing light/medium work.. more or less RPMs as the situation warrants.
Then, the tractor is ready to move... there is a rocker pedal under the right foot... rock it forward slightly to move forward slightly... rock it back with the heel of the shoe and forward motion will stop and it will reverse. Return to neutral and motion will quickly slow to a stop.. unless on significant incline it will not slip or creep... no clutch needed. The amount of forward/reverse depression of the foot pedal adjusts the forward/reverse speed... all within the same RPM setting. More forward/down means faster forward. More reverse/down means faster reverse. All this is without hitting the clutch.
This means you can (with practice) drive right up into a pile of sand with the FEL, and with continuous motions fill the FEL and start your reverse motion... all with no clutch and only rocking your foot forward or back... then speed forward to the point to dump it... let up on on the toe presssure while using the FEL to dump the load... and hit the reverse heel rocker and back away, turn and proceed forward to the sand pile again.
Bottom line is that I can do this a lot in one day and not get a tired leg from pressing the clutch.
Hope this helps.
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Then, the tractor is ready to move... there is a rocker pedal under the right foot... rock it forward slightly to move forward slightly... rock it back with the heel of the shoe and forward motion will stop and it will reverse. Return to neutral and motion will quickly slow to a stop.. unless on significant incline it will not slip or creep... no clutch needed. The amount of forward/reverse depression of the foot pedal adjusts the forward/reverse speed... all within the same RPM setting. More forward/down means faster forward. More reverse/down means faster reverse. All this is without hitting the clutch.
Hope this helps. )</font>
I have used the rocker pedal on a 3830. Do you keep your right foot on entire pedal, with toes on front and heel on back, rocking back and forth, or just press on front, then when you want to go in reverse, pick up your heel and press on rear pedal to go in reverse. I tried keeping my entire foot on the rocker pedal, but my foot seems a little small. My size 12 is just a bit to small to set comfortably on both parts at the same time. I am sure it is a technique issue. So what am I doing wrong?
Bob
Then, the tractor is ready to move... there is a rocker pedal under the right foot... rock it forward slightly to move forward slightly... rock it back with the heel of the shoe and forward motion will stop and it will reverse. Return to neutral and motion will quickly slow to a stop.. unless on significant incline it will not slip or creep... no clutch needed. The amount of forward/reverse depression of the foot pedal adjusts the forward/reverse speed... all within the same RPM setting. More forward/down means faster forward. More reverse/down means faster reverse. All this is without hitting the clutch.
Hope this helps. )</font>
I have used the rocker pedal on a 3830. Do you keep your right foot on entire pedal, with toes on front and heel on back, rocking back and forth, or just press on front, then when you want to go in reverse, pick up your heel and press on rear pedal to go in reverse. I tried keeping my entire foot on the rocker pedal, but my foot seems a little small. My size 12 is just a bit to small to set comfortably on both parts at the same time. I am sure it is a technique issue. So what am I doing wrong?
Bob
Muleskinner
Gold Member
The only time you depress the clutch on a M series with shuttle shift of any kind is to shift gear ranges. To switch from forward to reverse or visa versa you just come to a stop and move the shuttle lever on the steering column. You can depress the clutch when you come to a stop but it is not necessary
DLMaine01
Silver Member
- Joined
- Jan 19, 2005
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- Location
- Maine
- Tractor
- Sold theKubota L2250DT and now have a Kubota M4900DT
That is not so. I have an M4900 with the mechanical shuttle and the manual clearly states its use requires the use of the clutch. I have never tried it without the clutch and would not. It also says you do not have to come to a complete stop to shift from forward to rev or vise versa but to use caution as a sudden shift can cause damage.
Dave
Dave
jcollins
Gold Member
The M series that end in a HD you can shift between forward and reverse with out clutching because they are hydraulic shuttle shift transmissions the others you must clutch. The others are mechanical shuttle shift transmissions.
Mr. Collins... M series ending HD S/N 50587.... You have two choices either the Hydraulic shuttle model or the Synchro model. Very simply put on the HD model it allows you to go from forward to reverse WITHOUT depressing the clutch a ( proportional reducing valve). In fact the tractor should be moving slowly. The modulation valve in series with the directional wet clutch pack takes care of the shock load that the Hydraulic transmission would experience.
On the other hand the Synchro transmission REQUIRES the use of the clutch when going from Forward to Reverse and vice versa because of the simpler single disc clutch plate that must be disengaged from the flywheel during a directional change.
The only time you wouldn't use your clutch on an HD model is going from forward to reverse. You must use the clutch when going from range to range and speed to speed or damage will occur during the service life of the product. The only advantage I see from a sales standpoint is it's a great value for duty-cycles such as use of a front end loader. From a service standpoint it's not going to be setting in one of your service bays for a new clutch and pressure plate from abusive Wives and Truckers' who don't believe in clutches anyway. HAHAHAHAHAHAHAHA!
On the other hand the Synchro transmission REQUIRES the use of the clutch when going from Forward to Reverse and vice versa because of the simpler single disc clutch plate that must be disengaged from the flywheel during a directional change.
The only time you wouldn't use your clutch on an HD model is going from forward to reverse. You must use the clutch when going from range to range and speed to speed or damage will occur during the service life of the product. The only advantage I see from a sales standpoint is it's a great value for duty-cycles such as use of a front end loader. From a service standpoint it's not going to be setting in one of your service bays for a new clutch and pressure plate from abusive Wives and Truckers' who don't believe in clutches anyway. HAHAHAHAHAHAHAHA!
texasjohn
Super Member
Doc_Bob, I personally put my shoe on only one part of the rocker at a time... I did this from safety considerations when I started learning how to use the HST and have continued. I didn't want to get confused... or thrown off balance... and reverse direction unintentionally.
Net.. I think that experience, personal preference, length of rocker pedal and shoe all determine exactly how a driver chooses to use the pedal... if what you are doing works for you and you are comfortable doing it... then stay with it!!
Net.. I think that experience, personal preference, length of rocker pedal and shoe all determine exactly how a driver chooses to use the pedal... if what you are doing works for you and you are comfortable doing it... then stay with it!!
texasjohn
Super Member
Doc_Bob, I personally put my shoe on only one part of the rocker at a time... I did this from safety considerations when I started learning how to use the HST and have continued. I didn't want to get confused... or thrown off balance... and reverse direction unintentionally.
Net.. I think that experience, personal preference, length of rocker pedal and shoe all determine exactly how a driver chooses to use the pedal... if what you are doing works for you and you are comfortable doing it... then stay with it!!
Net.. I think that experience, personal preference, length of rocker pedal and shoe all determine exactly how a driver chooses to use the pedal... if what you are doing works for you and you are comfortable doing it... then stay with it!!
Muleskinner
Gold Member
I'm glad my M7040 is an "HD." I'm not sure why you would want a non hydraulic shuttle shift. The dealer tech explained to me the wet clutch pack is by far more heavy duty than the mechanical shuttle shift single disk dry clutch. Hence the "HD" behind the model designator. "HD" standing for heavy duty I would think. If it stood for hydraulic shuttle it would be "HS."
I know my L39 has a dry single disk clutch, but you do not have to use it to use the shuttle shift. Also the GST trans shifts on the fly. It also has a wet clutch pack inside of the trans that releases when you shift gears to prevent shock loads and to allow the trans to shift. The gear shift only actuates an electrical sensor to shift the trans.
I know my L39 has a dry single disk clutch, but you do not have to use it to use the shuttle shift. Also the GST trans shifts on the fly. It also has a wet clutch pack inside of the trans that releases when you shift gears to prevent shock loads and to allow the trans to shift. The gear shift only actuates an electrical sensor to shift the trans.
Muleskinner
Gold Member
I'm glad my M7040 is an "HD." I'm not sure why you would want a non hydraulic shuttle shift. The dealer tech explained to me the wet clutch pack is by far more heavy duty than the mechanical shuttle shift single disk dry clutch. Hence the "HD" behind the model designator. "HD" standing for heavy duty I would think. If it stood for hydraulic shuttle it would be "HS."
I know my L39 has a dry single disk clutch, but you do not have to use it to use the shuttle shift. Also the GST trans shifts on the fly. It also has a wet clutch pack inside of the trans that releases when you shift gears to prevent shock loads and to allow the trans to shift. The gear shift only actuates an electrical sensor to shift the trans.
I know my L39 has a dry single disk clutch, but you do not have to use it to use the shuttle shift. Also the GST trans shifts on the fly. It also has a wet clutch pack inside of the trans that releases when you shift gears to prevent shock loads and to allow the trans to shift. The gear shift only actuates an electrical sensor to shift the trans.
jcollins
Gold Member
BTW, I love your screen name I did not get the full meaning of it untill I saw your siganature. I am waiting on the special edditino with all 6 movies. Heard a rumor that they may remake the orginal three. One can only wait and hope. We are starting to sell more and more of the HD units in box blade applications where the operators are shifting from forward to reverse at almost full engine rpms. We have seen a couple shear the main shaft going thru the transmission but only two out the 40 or 50 we have sold so far. The SD units (mechanical shuttles) just require to much clutching for the contractors to even consider them. (contractors in the box blade business).
jcollins
Gold Member
BTW, I love your screen name I did not get the full meaning of it untill I saw your siganature. I am waiting on the special edditino with all 6 movies. Heard a rumor that they may remake the orginal three. One can only wait and hope. We are starting to sell more and more of the HD units in box blade applications where the operators are shifting from forward to reverse at almost full engine rpms. We have seen a couple shear the main shaft going thru the transmission but only two out the 40 or 50 we have sold so far. The SD units (mechanical shuttles) just require to much clutching for the contractors to even consider them. (contractors in the box blade business).
Muleskinner
Gold Member
I am a grading contractor. Grading house pads, building pads, roads, debrushing, Etc, is my main business. I would never.Repeat. NEVER EVER shift my shuttle shift on either my M7040HD or my L39 before letting off the throttle. To do so would be sheer stupidity.
I would not do it with the JD 210LE either. Now you know why I buy new equipment, not used. /forums/images/graemlins/smirk.gif It's the idiot operators like that that tear up equipment!
I would not do it with the JD 210LE either. Now you know why I buy new equipment, not used. /forums/images/graemlins/smirk.gif It's the idiot operators like that that tear up equipment!
Muleskinner
Gold Member
I am a grading contractor. Grading house pads, building pads, roads, debrushing, Etc, is my main business. I would never.Repeat. NEVER EVER shift my shuttle shift on either my M7040HD or my L39 before letting off the throttle. To do so would be sheer stupidity.
I would not do it with the JD 210LE either. Now you know why I buy new equipment, not used. /forums/images/graemlins/smirk.gif It's the idiot operators like that that tear up equipment!
I would not do it with the JD 210LE either. Now you know why I buy new equipment, not used. /forums/images/graemlins/smirk.gif It's the idiot operators like that that tear up equipment!
