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  #1  
Old 10-02-2017, 06:35 PM
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Alvy Alvy is offline
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Default Attention Low boy owners, 154 having issues

Looking for thoughts here on 3 issues with my Low Boy 154.

First is that the choke shaft on the carb is frozen solid, won't budge and have soaked it down many times with PB. I'm assuming it froze because of the dissimilar metals. Should I use low heat like a map gas torch concentrated on the outside bore of the shaft to try to free it up? Worried about warping it. Or better to submerge it in a penetrant or oil for a while?

IMG_2740.jpg

Also, it has a weird issue of running the fuel out of the line between the sediment bowl and tank and then dies. Cracking the line at either end or loosening the sediment bowl will make fuel flow again. Everything is good and clean and free flowing if I "burp" it if you will, but with the system sealed, it will have this issue. And yes I ran it without the tank lid on. Also, If I empty the see through sediment bowl and hook up the fuel line, when I open the petcock fuel will barely seep into the sediment bowl but if I disconnect the line just for a second, you can see it flow out like crazy into the bowl and make it's way to the carb. Am I right to think it's a sticking needle? It's an updraft carb but same principles apply.

Third issue is that the big coolant outlet on the block to the top of the radiator is pouring antifreeze out of the what looks to be a "weep" hole when it warms up. As we know this is a siphon feed system correct? Not sure why this is happening, doesn't seem to be over heating and I can take off the radiator cap, no steam or anything pours out. Thanks in advance, Mike
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Old 10-02-2017, 06:49 PM
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darkminion_17 darkminion_17 is offline
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Try the PB blaster rout.
Maybe vent in carb is clogged?
Blown head gasket?

Too bad you don't has a 184 as I have a carb...
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Old 10-02-2017, 08:05 PM
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Small update on 2 issues. Decided to use my small butane soldering iron with a torch top and heated both ends of the choke lever housing, a few cycles with some pen oil and it freed up.

Also didn't realize that the fuel inlet of the carb has a sort of 3/8 brake line deal and behind that is a screen that is apparently very plugged. This is more than likely causing my fuel supply issue. See the white area, that should look like a screen. It's getting a soak now.

IMG_2742.jpg
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Old 10-02-2017, 08:43 PM
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Quote:
Originally Posted by Alvy View Post
Also didn't realize that the fuel inlet of the carb has a sort of 3/8 brake line deal and behind that is a screen that is apparently very plugged. This is more than likely causing my fuel supply issue. See the white area, that should look like a screen. It's getting a soak now.

Attachment 87851
Welcome to small Farmall tractor repair 101. FYI, Super A's, 140's etc all use that filter/elbow. Some folks get desperate and cut it off, guess they want the trash to flow into the carb???

You'll notice you have an IH carb. As far as I know, the A,B,C and their later equivalents used either Carter or Marvel carbs--much better than the pot metal IH carb you have there. Guess I should say it seems the Cub carb doesn't hold up as well over time as the others. Now that I think of it, the threads for the inlet pipe tend to get stripped out on those--I think that was their biggest problem.

Your coolant leak, doesn't seem right to me, or maybe I'm just confused. Unless I'm wrong there is a "gooseneck" that bolts on top of the head with 2 bolts that connects to the top radiator hose. The coolant does not come out of the block. Should just be an ordinary gasket between that piece and the head.
Got a pic of the area leaking?
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Old 10-02-2017, 08:44 PM
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Oh yeah, Cub engines are bad about cracking on top of the head.
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Old 10-02-2017, 08:47 PM
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Thanks John I will tomorrow when it gets light. I believe it's the goose neck piece that you're referring to and it has what looked to me to be a weep hole in it that was pouring out but I will verify when I get the carb rebuilt and it runs again.
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Old 10-02-2017, 08:59 PM
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Looks like there may be a place on that gooseneck to put a temp gauge, right below where the radiator hose slides on. Take a look and see what you think.

https://partstore.caseih.com/us/part...r51453ar681375

I've worked on and used only a handful of 154's and to be honest it has been 10+ years since I messed with one, that's why I can't remember about a gauge, maybe it was an option (didn't see it in the parts book).
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Old 10-02-2017, 09:38 PM
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No weep hole on the neck. Maybe get us a pic of where it is leaking. Yes, you are correct, just a heat siphon system. No water pump, not really much pressure in it either.

Good deal you got the carb freed up!

The screen is a common IH thing. Not sure why as the sediment bowl has a screen. Extra protection I suppose... the days before paper fuel filters.

Lew's carb will work on a your tractor too.

The IH carbs weren't that great. I've seen them so warped you couldn't seal them up. Literally with the two halves together with no gasket, there was a gap wide enough to put two quarters into.
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Old 10-02-2017, 11:10 PM
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Wow. That's interesting. And I thought I had the better one cause it says IH on it.

I will take better pics of what I have tomorrow as far as the coolant neck, maybe a hole developed in it some how?

I can't believe how many parts Hamilton Bobs shows for these things either and also apparently I'm missing a few, ugg.

I don't know why but this ones growing on me. That little 4 cylinder runs so super smooth I think I could balance a quarter on it. Deck looks like it will mow pretty good too.

Maybe im liking it so much because I finally have a tractor that Lew doesn't have

Thanks for the advice guys
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Old 10-03-2017, 09:46 AM
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I know of two in storage, I can get for a myself price and they look a lot better than yours.
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