New 2016 Yanmar Tractor I-HMT Transmission
Page 1 of 3 1 2 3 LastLast
Results 1 to 10 of 21
Like Tree31Likes

Thread: New 2016 Yanmar Tractor I-HMT Transmission

  1. Top | #1

    Join Date
    Dec 2012
    Last Online
    09-01-2019 @ 12:21 PM
    Location
    WI
    Posts
    446
    Thanks
    12
    Thanked 51 Times in 39 Posts

    New 2016 Yanmar Tractor I-HMT Transmission

    Some of you may have seen this on other sites, Yanmar has some new tractors coming out in the spring

    YT235 35.5HP Rops Tractor.
    YT235 35.5HP Factory Cab Tractor W/Heat & Air Conditioning.
    YT347 47HP Rops Tractor
    YT347 47HP Factory Cab Tractor W/Heat and Air Conditioning.
    YT359 59HP Rops Tractor
    YT359 59HP Factory Cab Tractor W/Heat and Air Conditioning.


    I don't really want this thread to be about the tractors, but about the YT3 lines transmission which they call I-HMT (Hydro Mechanical?). I've seen it described as "It is not mechanical, it is not hydrostatic : it is the best of both worlds." Some pictures at this foreign language site komunální technika, reportá?e

    Can anybody explain this type of transmission? I think I have read that some larger tractors have it.
    JD 1023E
    KK XB Tiller, XB subsoiler

  2. Remove Advertisements
    GreenTractorTalk.com
    Advertisements
     

  3. Top | #2

    Join Date
    Jun 2014
    Last Online
    Today @ 06:12 PM
    Location
    Berlin, MA
    Posts
    4,600
    Thanks
    94
    Thanked 868 Times in 663 Posts
    In other places "Hydro-mechanical" transmission are referred to a "CVT" or "Continuously Variable Transmissions".

    This PDF gives a pretty good explanation of the system Caterpillar uses.

    http://www.nfpa.com/events/pdf/2012_...2028%20nov.pdf
    BigJim55 likes this.
    D160 Mower/Bagger.
    2014 2032R tractor/H130 FEL w/Bolt-On Hooks/54" Snow Plow/iMatch Quick-Hitch/County Line 5' Scraper blade/County Line Carry-All/Artillian 42" Forks & QH Adapter/JD Ballast Box/Frontier SB1164 3PH Blower/Leinbach PHD/Wallenstien BX42 Chipper

  4. The Following User Says Thank You to JimR For This Useful Post:

    kabic (02-02-2016)

  5. Top | #3
    Bonehead Club Lackey Levi's Avatar
    Join Date
    Jul 2013
    Last Online
    Today @ 10:39 AM
    Location
    NE Tenn.
    Posts
    10,148
    Thanks
    2,987
    Thanked 1,896 Times in 1,064 Posts
    Yep, I still don't understand it.
    BigJim55 likes this.
    1026R -- 60D mmm -- H120 Loader -- Curtis 150 Tiller -- DR 3 point Chipper -- Howse Middle Buster -- Brinly 16 Blade Disk -- Kodiak 5' Box Blade -- 12-42 lb. suitcase weights -- Lawn roller -- Upgraded seat springs from psrumors -- Kennyd's bolt on hooks & clevis -- BXpanded tooth bar -- CMI 6' wagon -- Heavy Hitch Cultivator /garden bedder / hiller attachments --

    Donated by some great people/vendors on here: 72 lb. wheel weights -- Bro-Tek 1˝" rear wheel spacers.
    NRA Life Member

  6. Remove Advertisements
    GreenTractorTalk.com
    Advertisements
     

  7. Top | #4
    Keeper of the GTT Cookies dieselshadow's Avatar
    Join Date
    Nov 2011
    Last Online
    Today @ 05:16 PM
    Location
    Joelton TN
    Posts
    19,783
    Thanks
    1,065
    Thanked 4,294 Times in 2,583 Posts
    Hmm. Interesting concept.

    Here's what I think I got out of the PDF Jim posted.

    In a nutshell, the engine spins a shaft to a planetary gear system with its output directly tied to the final drives. This represents the mechanical or normal gear transmission if you will. A hydrostatic pump and motor is the infinitely variable part of this equation. The engine output shaft also drives this hydraulic pump. The output of the operator controlled hydraulic motor drives a part of the planetary which in turn varies the output RPM of the planetary gear set which in turn changes your wheel speed. Pretty cool.
    etcallhome and BigJim55 like this.
    - Jason

    GreenTractorTalk.com Rules, Policies, and Terms of Use

    Subscribe to dieselshadowman on YouTube

    2720 w/ 200CX FEL
    , Ken's weld-on hooks, Fit Rite Hydraulics Top and Tilt kit, Artillian forks.
    1954 60 - getting full restoration, 1964
    110 round fender in the shop for crustoration
    Ferris IS3200Zzero turn mower

  8. The Following User Says Thank You to dieselshadow For This Useful Post:

    Craig Brock (02-02-2016)

  9. Top | #5
    Bonehead Club Lackey Levi's Avatar
    Join Date
    Jul 2013
    Last Online
    Today @ 10:39 AM
    Location
    NE Tenn.
    Posts
    10,148
    Thanks
    2,987
    Thanked 1,896 Times in 1,064 Posts
    Quote Originally Posted by dieselshadow View Post
    Hmm. Interesting concept.

    Here's what I think I got out of the PDF Jim posted.

    In a nutshell, the engine spins a shaft to a planetary gear system with its output directly tied to the final drives. This represents the mechanical or normal gear transmission if you will. A hydrostatic pump and motor is the infinitely variable part of this equation. The engine output shaft also drives this hydraulic pump. The output of the operator controlled hydraulic motor drives a part of the planetary which in turn varies the output RPM of the planetary gear set which in turn changes your wheel speed. Pretty cool.
    I'm not good at this. Are you saying that as you press down on the forward pedal the RPM's and speed picks up without having to mess with the throttle control?
    etcallhome and BigJim55 like this.
    1026R -- 60D mmm -- H120 Loader -- Curtis 150 Tiller -- DR 3 point Chipper -- Howse Middle Buster -- Brinly 16 Blade Disk -- Kodiak 5' Box Blade -- 12-42 lb. suitcase weights -- Lawn roller -- Upgraded seat springs from psrumors -- Kennyd's bolt on hooks & clevis -- BXpanded tooth bar -- CMI 6' wagon -- Heavy Hitch Cultivator /garden bedder / hiller attachments --

    Donated by some great people/vendors on here: 72 lb. wheel weights -- Bro-Tek 1˝" rear wheel spacers.
    NRA Life Member

  10. Top | #6
    Keeper of the GTT Cookies dieselshadow's Avatar
    Join Date
    Nov 2011
    Last Online
    Today @ 05:16 PM
    Location
    Joelton TN
    Posts
    19,783
    Thanks
    1,065
    Thanked 4,294 Times in 2,583 Posts
    Yes, hence the variable speed/output. You essentially change gear "ranges" and use the "go pedal" to change the speed within that range. ....If I understand the concept correctly.
    etcallhome, Levi and BigJim55 like this.
    - Jason

    GreenTractorTalk.com Rules, Policies, and Terms of Use

    Subscribe to dieselshadowman on YouTube

    2720 w/ 200CX FEL
    , Ken's weld-on hooks, Fit Rite Hydraulics Top and Tilt kit, Artillian forks.
    1954 60 - getting full restoration, 1964
    110 round fender in the shop for crustoration
    Ferris IS3200Zzero turn mower

  11. The Following User Says Thank You to dieselshadow For This Useful Post:

    Levi (02-03-2016)

  12. Top | #7
    rtgt's Avatar
    Join Date
    May 2013
    Last Online
    Today @ 02:01 AM
    Location
    Kentucky
    Posts
    6,346
    Thanks
    1,774
    Thanked 1,127 Times in 798 Posts
    Quote Originally Posted by dieselshadow View Post
    Hmm. Interesting concept.

    Here's what I think I got out of the PDF Jim posted.

    In a nutshell, the engine spins a shaft to a planetary gear system with its output directly tied to the final drives. This represents the mechanical or normal gear transmission if you will. A hydrostatic pump and motor is the infinitely variable part of this equation. The engine output shaft also drives this hydraulic pump. The output of the operator controlled hydraulic motor drives a part of the planetary which in turn varies the output RPM of the planetary gear set which in turn changes your wheel speed. Pretty cool.
    And the leg bone is connected to...?????

    Thanks for the explaination Diesel.
    etcallhome, Levi, BigJim55 and 1 others like this.
    Taking the easy way is what makes rivers and men crooked.

    3039R, H160 FEL, 375A Backhoe, Artillian Grapple & Forks
    Z915E
    XUV560

  13. Top | #8
    Official "Groovie" Dude
    Join Date
    Jun 2011
    Last Online
    @
    Location
    N/A
    Posts
    5,663
    Thanks
    1,459
    Thanked 744 Times in 605 Posts
    I was Google'n this and it's truly clutchless and functions with the hydro pedal like today's hst's. The YT4 shows it having a 3 range I-HMT so a mechanical range gear would provide some choices.
    etcallhome, Levi and BigJim55 like this.

  14. Top | #9

    Join Date
    Jul 2015
    Last Online
    Today @ 06:43 PM
    Location
    Near Roa. VA
    Posts
    3,586
    Thanks
    43
    Thanked 437 Times in 337 Posts
    How about a been there,,, done that machine,,,



    This machine moves by a band stopping the outside of the planetary,,,
    it has several planetary's to "stop" for various speeds,,,



    I believe the Ford Model "T" worked like this,,, but I have never operated one,,

    I did own two of the UFT tractors, though,,,
    etcallhome, Levi and BigJim55 like this.

  15. Top | #10
    Keeper of the GTT Cookies dieselshadow's Avatar
    Join Date
    Nov 2011
    Last Online
    Today @ 05:16 PM
    Location
    Joelton TN
    Posts
    19,783
    Thanks
    1,065
    Thanked 4,294 Times in 2,583 Posts
    That's not the same. Stopping the planets or ring isn't like varying the speed at which it is rotated. Infinite speed output vs fixed. That's relatively new.
    Levi likes this.
    - Jason

    GreenTractorTalk.com Rules, Policies, and Terms of Use

    Subscribe to dieselshadowman on YouTube

    2720 w/ 200CX FEL
    , Ken's weld-on hooks, Fit Rite Hydraulics Top and Tilt kit, Artillian forks.
    1954 60 - getting full restoration, 1964
    110 round fender in the shop for crustoration
    Ferris IS3200Zzero turn mower

  16. Remove Advertisements
    GreenTractorTalk.com
    Advertisements
     

Page 1 of 3 1 2 3 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •