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Farmall 756 with German 310 ( few Questions)

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migraine

05-14-2007 22:12:37

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I.H. dealer finally got this 756 in they been telling me about. Very nice original tractor with hardly a mark on it. Grill and hoods and fenders are near perfect, paint a little faded, dual lights in the fenders and light and flasher on the back. Dual pto and dual hydraulics out the back. 8 bolt 16 inch wheels on the front and 16.9 goodyears on the rear. I asked them to put it on the dyno for me to check it out. It pulled 74 hp with quite a bit of smoke and slobbered a little at first then cleared up. Also saw a little water condensation drops out the blowby when we got it warmed up then seemed to clean up some. Is this pretty normal for a tracotr that has been babied most of its life? Don't think this thing has ever worked very hard for very long. Probably needs a good 5 hour disc or plow workout or is there concern over head gasket or valve issues here. I don't need a motor project. Willing to sell it to me for trade in allowance of 6500 dollars U.S. Seems to shift very smooth, TA is strong and brakes will skid the tires and motor is so smooth. What else should I check out tomorrow cause I have to give them an answer on it. Thanks for bearing with me thru this rambling!

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Jimmy King

05-15-2007 05:55:21

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Re: Farmall 756 with German 310 ( few Questions) in reply to migraine, 05-14-2007 22:12:37

I have a 706 and a 756 both with a 310. I have not used the 706 on had pulls that much, but I have used the 756 since 1981. I over hauled it at 9000 hrs. I pulled a 10 tooth chisel plow, a 16 ft disc, a 15ft batt wing mower, 12ft New Holand Haybine, and a 605F Veermer Round baler. I have a friend that has a dino and had it on it onced at 540 it put out a constant 88 and at 350 it lugged a flat 100. If he turned it down any more it fell on it"s face. at 100 it would have started to heat a little though. The loads I have always had on it it really almost runs too cool, except when baling Alfalfa then the grill plugs with leave some times. That is not problem just shut it off take the screen out wipe it off and put it back. On the chisel plow I checked it once because that was the hardest pull I have had it on constantly, it burned 3 and 1/4 gals an hr, not bad.

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Glenn F.

05-15-2007 09:27:01

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Re: Farmall 756 with German 310 ( few Questions) in reply to Jimmy King, 05-15-2007 05:55:21

I have a 14' disk I'd like to watch you pull.

Glenn

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Nothing to it.

05-15-2007 17:33:48

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Re: Farmall 756 with German 310 ( few Questions) in reply to Glenn F., 05-15-2007 09:27:01

I can pull it with my M..... .....on hard ground with all the angle out

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georgeky

05-15-2007 16:45:50

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Re: Farmall 756 with German 310 ( few Questions) in reply to Glenn F., 05-15-2007 09:27:01

I pull a 15 foot Allis Chalmers disk with my 666. I have pulled it with the 584, but 3rd gear was a little slow.

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nw_bearcat

05-15-2007 05:29:39

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Re: Farmall 756 with German 310 ( few Questions) in reply to migraine, 05-14-2007 22:12:37

Maybe I just work mine a little too hard, i have trouble keeping it cool. we clip pastures and CRP w/ a 15' batwing, and you get about 4 hours of running in the morning until 10, then you get to go back after 4 in the afternoon, anything more and it just seems to get too hot. we've flushed the rad, running good coolant,and we keep the nose clean. I've been measuring to figure out if i can put a deeper rad. core in there from something like a 1066 to see if that might help

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Allan In NE

05-15-2007 06:45:21

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Re: Farmall 756 with German 310 ( few Questions) in reply to nw_bearcat, 05-15-2007 05:29:39

Oh Yeah, that.

Stick a candy thermometer in the radiator and I'll betcha ya it's not really running hot at all.

Put a heat gauge in it. Been thru this so darned many times on so darned many tractors that I can do it in my sleep.

I just don't know why IH's heat gauges don't last over about 20 years.

Allan

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chadd

05-15-2007 05:50:21

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Re: Farmall 756 with German 310 ( few Questions) in reply to nw_bearcat, 05-15-2007 05:29:39

Just out of curious, did you own the tractor since new? Has it been cranked up? A stock tractor shouldn't really overheat regardless of how hard it is worked or how long. If it is cranked up, well. . . that is another story, but it must have been cranked up pretty heavily or it had marginal cooling capacity to begin with. Just because you flushed the radiator doesn't mean it is clean. Have you felt around the radiator for cold spots? Can you look through the radiator everywhere (including the area behind the oil cooler)? Is the coolant actually circulating or flowing? Is the fan belt tight? Is the thermostat opening? Most older tractors were run with hard well water in the coolant. The lime and rust builds up in the coolant passages and in the radiator cores plugging up areas and forming cold spots in the radiator and hot spots in the head. I would check out all of the above before I would try getting a bigger radiator.

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nw_bearcat

05-15-2007 08:49:07

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Re: Farmall 756 with German 310 ( few Questions) in reply to chadd, 05-15-2007 05:50:21

The tractor's older than me, i'm the 2nd owner, 6900 hours w/ a engine OH, clutch, and TA somewhere in there ~3500 hrs. you can see light through the rad all over, the fins are clean and straight. the belt is tight, and we've replaced the thermostat just to see if that would help, no difference. I've never had it dyno'ed, but given it was supposedly an older gent that had it before, I'm doubting he had it screwed down too hard. I wouldn't mind, but if it heats as it is, any more would just be foolish.

I don't have a "real" gauge on it, but figure when it boils over, we need to slow down a bit. May put one on this summer and find out the real truth, and if i get motivated enough, might pull the rad and have it boiled, or put a different one on.

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randy hall

05-15-2007 05:39:57

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Re: Farmall 756 with German 310 ( few Questions) in reply to nw_bearcat, 05-15-2007 05:29:39

have you tried just running water in the radiator? water has a better heat exchange rate than antifreeze.

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nw_bearcat

05-15-2007 05:30:31

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Re: Farmall 756 with German 310 ( few Questions) in reply to nw_bearcat, 05-15-2007 05:29:39

another pic

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the tractor vet

05-15-2007 04:51:46

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Re: Farmall 756 with German 310 ( few Questions) in reply to migraine, 05-14-2007 22:12:37

Like the rest have said don't sound to bad and set at the 74 ponys means that nobody has tweeded her , the ones i have worked on have all been turned up as most of the guys around here that have them want a bit more for our hills but they work them for the most part and that keeps them cleared out . Getting to know the best way of starting them differs with each of them as no two that i have been around start the same . IF ya get it run it like ya stole if keep good oil and filters on her keep good clean fuel and filters on it and keep the charging system in top shape with good batterys and cables . If the fuel smoke seams heavy to you have them check the timing on the pump myself if i have more smoke then i think it should have i put a couple degrees more advance and this helps clear it up .

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TGIN

05-15-2007 02:24:10

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Re: Farmall 756 with German 310 ( few Questions) in reply to migraine, 05-14-2007 22:12:37

I`m with Allan , That tractor just needs a job !! I`ve got a 706 with the same motor and it always makes a big show with the smoke and all till it gets out workin . You`ll love the tractor it just aint real fond of idlein around with barnyard dutys , it will slober around like a back alley drunk . It wants to work !!

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Allan In NE

05-15-2007 03:08:23

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Re: Farmall 756 with German 310 ( few Questions) in reply to TGIN, 05-15-2007 02:24:10

Yep,

My 310 shines the best when it is pullin' clear up against the nuts. Just absolutely impresses me to no end.

Put it on a hay rake or a planter and the thing acts like it is being insulted. Almost sticks out it's lower lip and "pouts". :>)

Has yet to use a drop of oil and runs for days on end on a tank of fuel. One of the best tractors I've ever owned.

Cold blooded as he!! tho; anything below about 50 degrees and I give 'er a quick shot of the good stuff. :>)

Allan

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georgeky

05-15-2007 06:02:51

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Re: Farmall 756 with German 310 ( few Questions) in reply to Allan In NE, 05-15-2007 03:08:23

Hey Allen, I like that hay rake set up there. The good old American 312 starts right up down to 30 or a little less. It to is easy on fuel and will roar. I wouldn't take a farm in Georgia for my 666.

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chadd

05-15-2007 07:31:13

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Re: Farmall 756 with German 310 ( few Questions) in reply to georgeky, 05-15-2007 06:02:51

Yeah, that is impressive! Our 806 is pretty good down to about 40. The thirties are about where it becomes difficult to start and a squirt of either goes in and the twenties are where the block heater is turned on. We use the gas 2500A in winter, though so it really doesn't run much when it is cold.
I still see a bunch of those 6 and 7 's around here. Even the farms that have gone to all green for the new stuff have their silage blowers and other smaller stuff run by their 656's and 706's. There are still a ton of them around Wisconsin.

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georgeky

05-15-2007 10:13:12

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Re: Farmall 756 with German 310 ( few Questions) in reply to chadd, 05-15-2007 07:31:13

I plug mine in at 35 or less, so it don't take so long to warm it up. I use to have 656 with glow plugs, if they didn't work, you couldn't start it with dynomite. It was a real tractor, just hard to start.

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Allan In NE

05-15-2007 07:00:49

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Re: Farmall 756 with German 310 ( few Questions) in reply to georgeky, 05-15-2007 06:02:51

Hi George,

I've been told by some pretty sharp people that the 312 is hands down the finest engine that IH ever built.

Always wanted one, but I've never owned one. :>(

Allan

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georgeky

05-15-2007 10:21:39

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Re: Farmall 756 with German 310 ( few Questions) in reply to Allan In NE, 05-15-2007 07:00:49

I tried to buy this one from the local MF dealor. He ask 6500 for it and I offered 5000 in cash and he wouldn't take it. About a month later I was looking over a bunch of stuff in a tobacco warehouse that was going to be auctioned off the coming saturday. And don't you know there it was. I bought it at the auction for 4400. It had recent paint and brand new 16.9x38s on the back. I have had it 5 years the boy turned it over and it is still one of the best I have ever had or operated.

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wayne from wi

05-15-2007 05:55:52

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Re: Farmall 756 with German 310 ( few Questions) in reply to Allan In NE, 05-15-2007 03:08:23

Allen, your 310 should not start that hard cold. Are you using the primer position on the fuel shut off cable to start when it is cold? If you hold the cable out 1/4 of the way or so when starting engages the primer and puts more fuel in for starting. It makes a big difference. Wayne

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Allan In NE

05-15-2007 06:58:32

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Re: Farmall 756 with German 310 ( few Questions) in reply to wayne from wi, 05-15-2007 05:55:52

This one is a later 1980 model. Doesn't have the cable and still has the old 15:1 compression pistons in 'er.

I cussed it and I fought it for over a year until I figured that one out. Put a new can of either in the old sow and it completely made a new tractor out of it. :>)

Allan

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wayne from wi

05-15-2007 07:14:32

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Re: Farmall 756 with German 310 ( few Questions) in reply to Allan In NE, 05-15-2007 06:58:32

Allen, I guess I wasn't aware of the shutoff not using a cable. Of the 310's and 358's I have been around all used the cable, and many of the people using them were not aware of the starting primer. Is there any chance yours has an alternative such as position of the throttle for starting? It bothers me you need ether at 50 degrees to start. Wayne

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Allan In NE

05-15-2007 07:55:35

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Re: Farmall 756 with German 310 ( few Questions) in reply to wayne from wi, 05-15-2007 07:14:32

Wayne,

Now you've got me wondering. This old tractor was a total ship-wreck when I got it. I mean, it was a disaster area of unequaled proportions. Totally had to be rebuilt.

Does this pump look like it should have a cable attached down there on the bottom?

Somewhere along the line, I was told that the later ones didn't use the cable. I dunno.

Thanks,

Allan

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chadd

05-15-2007 09:32:02

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Re: Farmall 756 with German 310 ( few Questions) in reply to Allan In NE, 05-15-2007 07:55:35

Allan,

Is that a 686? If so, the Case IH parts site shows the choke control cable (PN 363709R95) listed under the Power tab. The only problem is that it doesn't show where it attaches. What about that little arm that looks like it is directly below the throttle control arm? It looks like there is a hole there that looks like it might accept a cable.

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wayne from wi

05-15-2007 08:24:25

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Re: Farmall 756 with German 310 ( few Questions) in reply to Allan In NE, 05-15-2007 07:55:35

Allan, There may be a serial number change. I really don't know about that. On your tractor where is the fuel shutoff? If yours is some type of electric solenoid shutoff, the primer that I am familiar with will not function, and the tractor will start hard. On the ones I have been around the cable is attached to a lever and shaft on the injection pump. I do not recall if it was an override of the throttle shaft or a seperate shaft. If you would pull the cable all the way out, that shuts off the fuel. If you pull it 1/4 to 1/3 out engages the primer. It overfuels in that position to start. It makes a huge difference in starting. Wayne

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Allan In NE

05-14-2007 23:37:21

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Re: Farmall 756 with German 310 ( few Questions) in reply to migraine, 05-14-2007 22:12:37

Oh Yeah,

Sounds plumb normal to me; slobber and smoke. But, oh what an engine!

If you can pour 2 gallons an hour down the thing, it would really surprise me. :>)

Allan

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