New guy with a 154

IH CUB Lo-Boy Series - 154, 184, 185 Forum -- Questions and answers to all of your Lo-Boy related issues.

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Larry B
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Re: New guy with a 154

Postby Larry B » Sun Dec 11, 2016 8:06 am

Inhibit switch is another name for the clutch safety switch. It inhibits the the engine from starting if the clutch isn't depressed. Before I dropped the pan I would get a socket and breaker bar on the front crankshaft pulley bolt and check for any play. The cam distributor and hydro are gear driven. If it is one of them you can feel the gear backlash. If there is zero movement you are pulling the pan anyway.

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Re: New guy with a 154

Postby Agage1 » Sun Dec 11, 2016 12:08 pm

Put a wrench on it and freed it up to the point where I could spin the motor by turning the pulley with two hands. It turned freely for several revolutions and seemed to have good compression. After about three revolutions it became impossible to turn by hand and had to put a wrench on it. I dropped the pan and everything looked good from underneath. I'm thinking a piston is binding somehow. You think I could pull the head and spray some on blaster down the bores with the pan off to loosen things up. I've done this on small Kohler k series with success

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Re: New guy with a 154

Postby Jim Becker » Sun Dec 11, 2016 1:32 pm

Agage1 wrote:. . . After about three revolutions it became impossible to turn by hand and had to put a wrench on it. I dropped the pan and everything looked good from underneath. I'm thinking a piston is binding somehow. . . .

Seems improbable. See if you can relieve it by moving the hydraulic control.

Larry B
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Re: New guy with a 154

Postby Larry B » Sun Dec 11, 2016 3:11 pm

If you can turn it 2 revolutions I doubt it is a piston considering it ran for a few minutes. You can always put a couple tablespoons of Kroil or sometthing similar in each cylinder and try to crank the engine with the plugs out. You can remove the lines from the hydo pump and see if the engine frees up. Also check the fan bearing. If you could turn the engine by hand probably not a bad main bearing. Have you checked to make sure there is nothing wrong with the clucth? You say you bypassed the safety switch are you trying to turn the engine with the cluth engaged? Have someone depress the clutch and see if the engine is tight. The C60 engine is pretty bullet proof as long as it has oil in it. When you say it got hard to turn is it smooth but hard to turn or does it give and stick like a stuck brake? If a bearing in the PTO was bad you would probably hear it.

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Re: New guy with a 154

Postby Larry B » Sun Dec 11, 2016 3:16 pm

Oh yeah, probably want to forget about pulling the head. That is probably the single hardest thing to do on that engine. You will break a lot of the bolts as some go into the water passages and have corroded and won't come out.

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Re: New guy with a 154

Postby Agage1 » Sun Dec 11, 2016 5:02 pm

I guess I'm gonna look at the clutch. When I dropped the pan everything looked good. I pulled the head today and besides a ton of carbon build up everything looked normal. Even with the head off I could hand spin the engine easily for a turn or two then I couldn't and needed the breaker bar

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Re: New guy with a 154

Postby Agage1 » Sun Dec 11, 2016 5:04 pm

Guess I got lucky. I can see how pulling the head could get ugly real quick. Got mine off without issue with a little finesse

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Re: New guy with a 154

Postby Larry B » Sun Dec 11, 2016 5:18 pm

Next time I pull a head I may need some of your finesse. I have never gotten one off with out breaking at least a couple bolts. Glad you got it off without problems.

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Re: New guy with a 154

Postby Agage1 » Sun Dec 11, 2016 7:01 pm

I sprayed some blaster on the bolt heads last night before I took it off. Don't know if that helped or not but they all came out

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Re: New guy with a 154

Postby Larry B » Sun Dec 11, 2016 9:08 pm

When you go to put the head back on check the length of all the bolts for stretching. The torque spec is 45-50 ft lb which is actually more than is recommended for a 3/8 grade 8 bolt. The few I have done I bought new grade 8 bolts and ground them to the same length as the old ones and used some sealer on them. There are lots of guys on here more knowledgeable than me about the internals of the engine they can give you some good info.

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Re: New guy with a 154

Postby twotone » Sun Dec 11, 2016 9:41 pm

I had the flywheel bolt break on my 154, worked it's way out and got wedged, engine wouldn't turn.
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Re: New guy with a 154

Postby Agage1 » Tue Dec 13, 2016 7:07 am

I don't know guys the motor looks good and I'm thinking it's something else. Where should I start? I've never had one of these tractors so I'm learning as I go. Is there an easy way to bypass the clutch and hydraulics just to see if the motor will spin more freely.

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Re: New guy with a 154

Postby staninlowerAL » Tue Dec 13, 2016 9:01 am

Don't know about an easy way but you could disconnect the driveshaft completely. You're probably going to have to do that anyway if you get into the clutch/flywheel assembly.

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Re: New guy with a 154

Postby Jim Becker » Tue Dec 13, 2016 10:53 am

Jim Becker wrote:. . . See if you can relieve it by moving the hydraulic control.

Did you try this yet?

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Re: New guy with a 154

Postby Larry B » Tue Dec 13, 2016 5:36 pm

If you move the hydraulic lever forward it should lock into the float position and relieve any pressure in the hydraulics
there are 2 belts at the back of the engine that drive thePTO. Move them off the pulleys.
Remove the driveshaft (easier said than done)
Remove the fan belt
see if any of that frees it up


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