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Thread: My Tatra T815 VT 8x8

  1. #1
    Corporal
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    Default My Tatra T815 VT 8x8

    A work in progress:
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    Another Ahab (12-26-2014), bchauvette (12-26-2014)

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    4 Star General shenkmen's Avatar
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    Jealous.
    1970 Kaiser M35A2 w/ow, T831's
    2006 M105A2
    Lancaster, PA

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    Many thanks to T-815 who let me pick his brain because I was completely ignorant on Tatras. Best advice was that the crew cab on the 815 puts the motor to the rear. So: flat floor in front seating area (4 seats) and a quieter ride. The 19L V12 twin turbo is behind you. A conversation can be had while you are on the highway. Another surprise was the road speed-literature said 80 kph. I had it up to almost 100 and it was not as loud as I thought it would be-still safe rpm. That was with the stock bias ply tires and the fact it has hub reductions. Using the hand test prolonged highway didn't appear to heat the hubs up too bad. A set of Michelin XZL's is on deck ready to go. Pictures show functional 80's technology NCB system, dash and box off view which shows mid-mount winch. Winch is driven from rear of transmission. Includes tensioner, power in, power out, brake. Controlled from inside cabin-no remote of course.
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    Last edited by Rusty Loads; 03-22-2014 at 23:39.

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    Colonel muthkw25's Avatar
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    What a great find! Where did you pick this up if I may ask? Does the 815 require you to double clutch or are they all syncros?
    1971 M35A2 w/winch
    1971 M35a2C
    2009 M105a2 Rebuild w/s-250 shelter (camper build)
    1968 M105A1
    MKT-85. Saw service in Germany

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    Someone will probably shoot me down who knows better-I believe it does have synchros. The closest trans I have used that is similar would be the one on a French Mack. (midliner) The Mercedes trucks in the 80's were similar too. 5 speed stick, It can be driven as a straight stick but she still likes the clutch-not like a Fuller or Eaton trans where once you get out of first the clutch is not required. Each of those 5 speeds and reverse can be split. To achieve the split the clutch needs to be put to the floor to actuate the air solenoid. So each gear has a low/high. You also have a Tortoise/ Hare selector that you switch when stationary. I wouldn't call the Tortoise a super crawler like the one on a Unimog but it's more of a regular crawler or working group. Effectively 20 speeds forward and 4 in reverse. I imported it myself. Was not easy..took about a year.
    Last edited by Rusty Loads; 03-23-2014 at 02:39.

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    Colonel muthkw25's Avatar
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    Have you driven a Tatra before and/or knew what you wanted or did you just take a gamble?
    1971 M35A2 w/winch
    1971 M35a2C
    2009 M105a2 Rebuild w/s-250 shelter (camper build)
    1968 M105A1
    MKT-85. Saw service in Germany

  9. #7
    General PaFarmer's Avatar
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    That truck looks to be in very nice condition. I enjoy the European trials they run with Tatras and the like.
    1939 BMW R71 cycle with sidecar
    1942 White M3A1 scout car
    1943 Diamond T M3A1 halftrack
    1944 Dodge WC51
    1945 Dodge WC 52
    Willys Jeeps x 3
    1970 M- 818 w/w on 53"s
    1970 M-35A2
    1990 M923A2
    1992 M998 HMMWV

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    Quote Originally Posted by muthkw25 View Post
    Have you driven a Tatra before and/or knew what you wanted or did you just take a gamble?
    Never drove one or saw one in the flesh. Grew up around a lot of different vehicles but never anything Czech. Owned Unimogs since 1989 and they are different than most of what you see here in North America. I think gamble would be the right word, some people might say naive or worse. The truck was in very good shape except for one thing: It did not move at all when it arrived. It came over ro-ro and one of the stories I have heard (unconfirmed) is that they get the largest truck and use it to drag all the non-moving stuff off the boat. It may have worked when it was loaded but she-a-no-move when I got it. We went through a lot of examination and hypotheses until we arrived at the clutch. Completely smoked down to the rivets. Ok-take clutch out and put in a new one. Truck still did not move. We then realized the clutch plate that came with it was installed backwards. D'oh. Might have been a young military mechanic in training who did it -who knows. After we got that sorted she ran fine. Learning curve for sure on these things. Had about 900 hours on it and 33,000 KM's. Almost no rust-but we are cleaning up what little surface rust there was. Rear box was sandblasted and painted. Cab is being done now-getting a light scuff and paint and I am replacing 90 percent of the rubber trim/ weatherstrip in cab. It is a 1985. To answer earlier question it came from the Czech Republic.

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    I have the dozer blade to mount yet; maybe this summer I will get it hooked up. Missing a few parts and still trying to figure out the PTO output at front of motor. Here is a picture of the same truck with dozer mounted. As if the approach angle wasn't bad enough already! I guess what it can't negotiate it just pushes through it anyways.
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  13. #10
    4 Star General two.fiveM35's Avatar
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    Very nice Sir.
    1970 M35A2
    M105A2
    M149A2
    M101A1
    M101A2
    MEP-003A

    http://www.youtube.com/watch?v=Yco1d...e_gdata_player

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