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Thread: Differences D8 35a and 36a

  1. #1
    Join Date
    Dec 2009
    Location
    alabama and georgia
    Posts
    5

    Default Differences D8 35a and 36a

    Anyone know what the differences are between these two tractors?
    IF IT AIN'T A CAT ITS A DOG!

  2. #2
    Join Date
    Nov 2006
    Location
    Napa Valley - Newville CA
    Posts
    848

    Default

    Same tractor 36A direct drive 35A tourqe converter 46A power shift

  3. #3
    Join Date
    Nov 2006
    Location
    Pierre, S.D. USA
    Posts
    23

    Default Differences 35a 36a

    The 36 a was a 6 speed Direct drive D8H series. The 35a was a 3 speed Torque Converter D8H series. The 46 a was the Powershift model. I have operated all in Dozer and Pushcat configeration. My experience with the 35a was bulldozing over large trees for an Airstrip project and it was a dream machine to operate, just pull up to the tree, put the blade on the tree and open the decelerator, presto over the tree went. Nice for pushing scrapers out of the cut as we could double head and shift the lead pusher into 3rd then push the loaded scraper out of the cut at a faster rate of speed, not as efficient as the 46a but close. The 36 a was tough, shifting could be difficult until an operator learned the trackspeed related to the gear shifting then essentially, in pushing, could be shifted on the go to pick up the load on the scraper to be pushed. The 46 a was really good as it took the operators attention off shifting and onto the load etc. All were excellent machines, I operated them from Alaska, Cuba, Vietnam, Puerto Rico, South Dakota and I love the D8H tractors they were the best, rock solid and bullet proof.
    SeaBee Mal

  4. #4
    Join Date
    Dec 2009
    Location
    alabama and georgia
    Posts
    5

    Default

    Thanks much , really appreciate the explanation

    Quote Originally Posted by SeaBee Mal View Post
    The 36 a was a 6 speed Direct drive D8H series. The 35a was a 3 speed Torque Converter D8H series. The 46 a was the Powershift model. I have operated all in Dozer and Pushcat configeration. My experience with the 35a was bulldozing over large trees for an Airstrip project and it was a dream machine to operate, just pull up to the tree, put the blade on the tree and open the decelerator, presto over the tree went. Nice for pushing scrapers out of the cut as we could double head and shift the lead pusher into 3rd then push the loaded scraper out of the cut at a faster rate of speed, not as efficient as the 46a but close. The 36 a was tough, shifting could be difficult until an operator learned the trackspeed related to the gear shifting then essentially, in pushing, could be shifted on the go to pick up the load on the scraper to be pushed. The 46 a was really good as it took the operators attention off shifting and onto the load etc. All were excellent machines, I operated them from Alaska, Cuba, Vietnam, Puerto Rico, South Dakota and I love the D8H tractors they were the best, rock solid and bullet proof.
    SeaBee Mal
    IF IT AIN'T A CAT ITS A DOG!

  5. #5
    Join Date
    Nov 2006
    Location
    Dallas Pa.
    Posts
    1,902

    Default 46a

    Probably not many people know it but Wilkes Barre Pa. area was one of the proving grounds for the development of the 46A power shift tractor.The factory sent a Cat engineer Bob Casey here to Cleveland Bros.Cat dealer here in Wilkes Barre Pa.in 1957 or just before for the development of the power shift transmission.It first was put in a 15A tractor and had 5 speeds I think it was and no torque convertor so was pretty harsh shifting. The tractor was up dated and we had 4 tractors and improved transmissions before it was finished.The last couple were petty much the same as the 46A tractor.They were loaned out to mostly coal strippings outfits so more hours in less time could be put on them.After so many hours the tractors were brought in and disassembled and everything miked and checked for wear by the Cat engineer assisted by dealer helpers.The test took two years or more and the engineer lived here in Dallas near me and stayed here for the factory for awhile after the new tractors (46As) came out and worked on a few other things that Cat came out with.My family and I got to be close friends with the engineer and his family while they lived here but he passed away a few years ago after he moved back to Washington Ill.Was a great experience for all of us at the dealer to work on this new tractor model and the Cat engineer and we,ll never forget it.

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