1977 312
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    Trav1s's Avatar
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    1977 312

    I have been sitting on a '77 312 for almost a year. I picked it up really cheap after the previous owner believed it tossed a rod. I planned to rebuild the k301 Kirk-style (AKA: The Killer Kohler) and use it for snow removal with my model 49 blower. I have been planning a simple cosmetic refresh along the way. I mentioned that the K301 needed rebuilt to the son of the friend who is storing it for me. The son is starting at the local community college and asked if he could use it as the basis of the first small engine project. It turns out I am getting a fresh rebuild for the cost of parts only and he gets the experience of the project. Zach is totally psyched about this.

    Here are a few pics of my 312 which is an early machine.

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    Last edited by Trav1s; 09-23-2014 at 11:04 AM.
    Trav1s on WFM
    '67 110, '68 side tag 110, '71 120/41 deck "worker," '77 312, '88 318/38 deck/49 blower, 7 & 10 carts, 51SV Chain saw, and a couple of old JD push mowers and a 318 needing a new heart.

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    BigJim55 (12-29-2014), T-Mo (09-23-2014)

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  4. Top | #2
    Trav1s's Avatar
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    I have also included some details about 312 that I have put together along the way.

    From WFM
    Manufactured briefly from 1977 to 1978, the model 312 provided a basic, no frills 300 series tractor with 12 HP Kohler engine, no engine side panels, no ammeter, H1 hydraulics, narrower rear tires, and a single brake pedal for both rear wheels. Headlights were an option on the 312.

    Year Serial Number Range

    1977 70,001 - 80,000
    1978 80,001 - 95,000
    Also worth noting:
    Another bit more information about the 312 - The steering box/drag link/tie rods look to be the same as the 120/140 design and it uses the same style drive shaft. The 314/317 got updates in both of these areas. The 312 has one brake (like the 120) and the 314/317 use dual brakes (one on each side). The 312 uses the same cradles/isolater as the 314 but the frames are different between the early 312, late 312, and 314.

    So, while it initially seems the 314 is a 312 with side panels there are some significant differences that are more than skin deep between the two.
    Attached Thumbnails Attached Thumbnails post-5472-0-90332000-1378481626.gif   post-5472-0-52688600-1378481162.gif  
    Last edited by Trav1s; 09-23-2014 at 11:09 AM.
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    Trav1s on WFM
    '67 110, '68 side tag 110, '71 120/41 deck "worker," '77 312, '88 318/38 deck/49 blower, 7 & 10 carts, 51SV Chain saw, and a couple of old JD push mowers and a 318 needing a new heart.

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    Travis, sounds like a win-win situation. You get a rebuilt engine and he gets some experience.

    One more tidbit on the 312. It was the introduction of the 312 that prompted Deere to change the nomenclature on the 300 to 316. The 316 is a 300 just with a different model number as Deere didn't want to confuse potential buyers into thinking the 312 was more upscale than a 300. A 312 was in fact a stripped down version of the 300 with less frills and smaller engine, but the fact that "312" was greater in a numerical sense than a 300 prompted the 300 to become the "316".
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    Without ice cream, there will be darkness and chaos!
    Olympian Don Kardong

    1965 110s, 1966 110, 1967 112, 2001 LT150, 2003 GT245, 2004 GX345, 2006 X320

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    Trav1s's Avatar
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    I have a different hood for it as the one on it is in rough shape and the old seat from teh 120 is going on the 312. It seems appropriate that I start another project at the same time I work on the 110.
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    Trav1s on WFM
    '67 110, '68 side tag 110, '71 120/41 deck "worker," '77 312, '88 318/38 deck/49 blower, 7 & 10 carts, 51SV Chain saw, and a couple of old JD push mowers and a 318 needing a new heart.

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    The rebuilder removed the pan and found that it tossed the connecting rod at suspected. When it broke it also wiped out the oil splasher. He pulled the info on the engine and I am am pretty sure it is the original k301 to the tractor with a '77 production date. The class instructor suggests a .010" overbore since there is some scoring in the cylinder wall. I do know in the past it received a light hone with a new rod and piston. The crank also needs turned .010" under which I am guessing is why it threw the rod the 2nd time. This one does NOT have the ballance gears. Woohoo!

    My parts list so far includes:
    - .010" piston
    - .010" rod
    - gasket kit
    - Kohler/Carter 26 carb

    Considering the following mods while it is apart:
    - Roller crank bearings (from MidwestSupercub which is about 40 miles from me)
    - Kirk crank weight
    - Kirk Pointslayer
    - Kirk Billet engine breather cover
    Last edited by Trav1s; 09-29-2014 at 03:20 PM.
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    Trav1s on WFM
    '67 110, '68 side tag 110, '71 120/41 deck "worker," '77 312, '88 318/38 deck/49 blower, 7 & 10 carts, 51SV Chain saw, and a couple of old JD push mowers and a 318 needing a new heart.

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    I am in the Quad Cities. Good to see another Iowa tractor here!
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    Matt

    NRA Life Member

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    Trav1s's Avatar
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    Quote Originally Posted by MFreund1 View Post
    I am in the Quad Cities. Good to see another Iowa tractor here!
    Been in the QC since Sunday night for a conference. Definitely good to be back in Iowa.
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    Trav1s on WFM
    '67 110, '68 side tag 110, '71 120/41 deck "worker," '77 312, '88 318/38 deck/49 blower, 7 & 10 carts, 51SV Chain saw, and a couple of old JD push mowers and a 318 needing a new heart.

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    Trav1s's Avatar
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    The rebuilder checked the bore today and it seems the block has been bored in the past. It looks like the block will go .040" over to clean up the bore. Here are some pics.
    Attached Thumbnails Attached Thumbnails IMG_3715.jpg   IMG_3716.jpg   IMG_3717.jpg   IMG_3718.jpg   IMG_3719.jpg  

    IMG_3720.jpg   IMG_3712.jpg  
    BigJim55 likes this.
    Trav1s on WFM
    '67 110, '68 side tag 110, '71 120/41 deck "worker," '77 312, '88 318/38 deck/49 blower, 7 & 10 carts, 51SV Chain saw, and a couple of old JD push mowers and a 318 needing a new heart.

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    T-Mo's Avatar
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    Thanks, Travis, for keeping us updated. It sounds like you're making some progress on this rebuild.
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    Without ice cream, there will be darkness and chaos!
    Olympian Don Kardong

    1965 110s, 1966 110, 1967 112, 2001 LT150, 2003 GT245, 2004 GX345, 2006 X320

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    If this pace continues the 312 could easily be serving snow removal duty this winter with the 49 blower on the front. I am going to try to get the H-2 conversion done while the engine is out since all the parts are sitting in my garage waiting. If I don't get the valve in I can at least get the hard lines in place before the engine goes back in. Still want to get the correct steering wheel for it and swap in the old seat from the 120.
    BigJim55 likes this.
    Trav1s on WFM
    '67 110, '68 side tag 110, '71 120/41 deck "worker," '77 312, '88 318/38 deck/49 blower, 7 & 10 carts, 51SV Chain saw, and a couple of old JD push mowers and a 318 needing a new heart.

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