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720 Allis Chalmers

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Mike K View Drop Down
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Joined: 27 Sep 2009
Location: Edgar, WI
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike K Quote  Post ReplyReply Direct Link To This Post Topic: 720 Allis Chalmers
    Posted: 19 Apr 2020 at 10:22pm
Put my tiller on today. When I try to till in the ground, the motor slows and will not come back. what is wrong with the onan motor.
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exSW View Drop Down
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Joined: 21 Jul 2017
Location: Pennsylvania
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Post Options Post Options   Thanks (0) Thanks(0)   Quote exSW Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 2020 at 8:28am
Governor? This is a swag answer.
Learning AC...slowly
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Steve in NJ View Drop Down
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Joined: 12 Sep 2009
Location: Andover, NJ
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 2020 at 9:41am
Mike,
Check your fuel delivery and your air intake. Maybe air cleaner is pluggin' up and not getting enough air. Inspect the spark plugs to. Might need a couple new plugs. (especially if they're Champions) Few easy things to check...
Steve@B&B
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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injpumpEd View Drop Down
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Joined: 13 Sep 2009
Location: Walnut IL
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Post Options Post Options   Thanks (1) Thanks(1)   Quote injpumpEd Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 2020 at 3:16pm
Mine loses a lot of power when the points need re-set.
210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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AC720Man View Drop Down
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Joined: 10 Oct 2016
Location: Shenandoah, Va
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AC720Man Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 2020 at 3:29pm
Points is a good place to start, they require to be checked every 100 hours or sooner. I also had a fuel filter slowly clog over the winter last year. Drove me nuts until I saw very little fuel in the clear filter. Replaced it and she ran like a champ.
1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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AC720Man View Drop Down
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Joined: 10 Oct 2016
Location: Shenandoah, Va
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AC720Man Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2020 at 7:33pm
Well, interesting thing happened yesterday. Got one of my 720’s out for the first time this year. I usually use it to till my garden and run the bush hog. Yesterday while tilling the garden she sputtered about 5 minutes after I began. Came back about 5 minutes later, she started right back up for 30 seconds and shut down again. So, 2 years ago same thing happen. Replaced the fuel filter and off she went and never gave anymore issues. Same thing yesterday, replaced what appeared to be a perfectly good filter. Turned it upside down and a bunch of rust came out. Filter was mostly clogged. New filter and I finished tilling the garden, bush hogged, and used the blade to level some gravel for a patio. Simple fix
1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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AC720Man View Drop Down
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Joined: 10 Oct 2016
Location: Shenandoah, Va
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AC720Man Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2020 at 7:37pm
1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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Steve in NJ View Drop Down
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Joined: 12 Sep 2009
Location: Andover, NJ
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2020 at 6:28am
Great pics Rob! I like to see em' workin'. Like I said, that fuel delivery system sometimes bites ya.  LOL!
Steve@B&B
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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8070nc View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8070nc Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2020 at 6:26pm
Id like to know where you got the rotary cutter

1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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AC720Man View Drop Down
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Joined: 10 Oct 2016
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AC720Man Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 2020 at 7:49pm
Got very lucky. Went to buy another 720 a few years ago. Had a front blade to go with it and a parts tractor that was involved in a garage fire. As I was loading it the fella surprised me and said do you want the ole bush hog that goes with it? I said absolutely, where is it? He said you walked right by it, it’s covered up under that tarp. Needless to say I was ecstatic. I brought it home, sandblasted it, and gave it a paint job. It works great mowing around my fence rows.
1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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Gary Burnett View Drop Down
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Joined: 11 Sep 2009
Location: Virginia
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary Burnett Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jun 2020 at 6:20am
Originally posted by 8070nc 8070nc wrote:

Id like to know where you got the rotary cutter



I have one I'll sell.Mechanically fine deck needs some work.
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