Did I do any major damage yet???

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myusersname
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Did I do any major damage yet???

Postby myusersname » Tue Jul 28, 2015 8:35 pm

Hi guys, I'm in a bit of a bind.

I came across a farmall cub serial 60891 1800rpm max, that's all that is legible on the tag. The guy said it has been sitting for at least 10 years but looks to be mostly complete. It lacked the battery and a few other body parts, no lights. I couldn't tell if it is 6V or 12V and the "owner" didn't know either. I must remove it from his property tomorrow, but before I bought it I wanted to see if the engine was locked up. The gas tank and radiator were dry. I splashed a little bit of gas in the tank and made sure the flow was wide open on the tank. I had a 12V battery and hooked it up as negative ground. I hit the starter and it chucked about 5 times. Then dust and dirt came out the exhaust and the old girl came to life purring like a kitten!!! It was an awesome sight to see and hear. It ran great no smoke, I checked the hydraulic lift it worked and then shut her down. In all about 30 seconds of run time. But once shut off there was still a noise up front, either the generator/alternator or starter, something electrical buzzing. I quickly pulled one of the battery connections loose and the noise stopped.

So, I'm thinking maybe its a 6V??? The guy had another one that was 12V or at least the battery was, and it has a big voltage regulator mounted on it. The old one I'm fooling with didn't have that. But both alternator/generators of both tractors look the same, about 7" long, not short like a car alternator. The coil is about 4" long if that matters. Also when it was running the ammeter was discharging not charging. So this makes me also lean toward a 6V positive ground system.

Would the thing start and run if I hooked a 12V battery up to negative ground if it was 6V positive ground system?

I have to move this thing tomorrow and would love to just drive it on the trailer but need to know if I should buy a 6V battery or a 12V.

Thanks in advance guys!!

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Barnyard
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Re: Did I do any major damage yet???

Postby Barnyard » Tue Jul 28, 2015 9:52 pm

According to the serial number it would be a 1949, so it is 6 volt. Hook it up with pos ground. Also, before running it too long you need to check the oil pressure. It probably needs to be primed after sitting so long. Don't run it long if there is no pressure.
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Re: Did I do any major damage yet???

Postby Bob McCarty » Tue Jul 28, 2015 10:07 pm

If you can winch it onto your trailer for the trip home, you're less likely to damage something due to lack of lubrication, shorted wiring, etc.

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Don McCombs
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Re: Did I do any major damage yet???

Postby Don McCombs » Tue Jul 28, 2015 10:16 pm

In my opinion, you have already run it as much as you should without proper lubrication. Winch or push it onto the trailer, as Bob suggests.
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bob in CT
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Re: Did I do any major damage yet???

Postby bob in CT » Tue Jul 28, 2015 10:16 pm

Welcome to the forum and congratulations.

I would not run it at all without an oil change at a minimum. Better yet, download a free owner's manual in PDF manuals above and read it from cover-to-cover and go through a FULL lube service as recommended. That will keep you busy for a weekend. Winch it on and be patient. Each cylinder should have had a good dose of penetrating oil and a day and then a good shot of oil before starting after a long layover. Most engine wear occurs on a cold start

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Re: Did I do any major damage yet???

Postby pickerandsinger » Wed Jul 29, 2015 6:04 am

Welcome to the forum…..Get some advice and ask questions before you tackle into anything…You will likely do more damage if you haphazardly attempt to address issues you are not familiar with….The advice is here and free for the asking….If you are not familiar with how to proceed start with the asking bit…..Good luck….. :D Dave
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Re: Did I do any major damage yet???

Postby Matt Kirsch » Wed Jul 29, 2015 8:20 am

Even if it's 6V, odds are the electrical system is not working anyway, so you did not make things any worse.

The starter doesn't care about 6V or 12V. Just avoid prolonged cranking with the starter on 12V and it will be fine.

If you want to make it original, get a 6V battery, but the 12V battery you have now will work to drive it up on the trailer if you want. The ramifications of running the engine without oil pressure, or bad stuff in the crankcase notwithstanding...

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Mike in Louisiana
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Re: Did I do any major damage yet???

Postby Mike in Louisiana » Wed Jul 29, 2015 8:46 am

Welcome to the forum.

Be sure to read that owners manual. There are hidden lube and grease fittings, throw out bearing, fan hub, generator etc.
1975 cub (LouAnn) serial # 245946, 1941 John Deere Model H

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Re: Did I do any major damage yet???

Postby staninlowerAL » Wed Jul 29, 2015 9:07 am

Congratulations on your find and being able to start it without major problems. You have already recieved a lot of good advice on bringing it back to a useful life. Welcome to the FORUM.

myusersname
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Re: Did I do any major damage yet???

Postby myusersname » Wed Jul 29, 2015 8:36 pm

Well thanks everyone for the replies. I actually had one more day so I want to read up on the priming oil pump, that sounds very important. I didn't think to look to see if the oil pressure gauge showed pressure when it was running. The oil looks ok as far as used oil goes, no water or sludgely clumps. I did get a 6V battery for sport I guess. $105 bucks :shock: geez, and I can't use it on anything else for the other half of the year.

So if I pull the coil wire and turn her over and the oil pressure gauge shows pressure, do I need to prime the oil pump??

Supposedly the guy's dad used it up until his death. So my guess is it was parked in running condition. I'm wondering if he winterized it and dumped the water and gasoline, it that common practice with these?

My main pain with getting it on the trailer without power is that there is a cultivator rake (or little chisel plow??) hooked to the back and I have no clue how to get it off, as the weeds are all up in it. the back tires are in good shape and holding air, the front are beyond done, however there may be tubes in them, which may be ok.

What an awesome forum, free pdf manuals :worthy: :worthy: :worthy: :thanx:

myusersname
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Re: Did I do any major damage yet???

Postby myusersname » Wed Jul 29, 2015 8:50 pm

Also the guy said he thought his dad converted everything to 12V. Without the battery there are there any easy signs that a conversion has been done? Like I said, it did start and run off a 12V battery connected as negative ground, so I'm still baffled by this. Thanks Fellas!

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bob in CT
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Re: Did I do any major damage yet???

Postby bob in CT » Wed Jul 29, 2015 9:04 pm

See if you have 12 volt light bulbs. Pop one out and they should be marked.

Take a small pump oiler with you. Take the top off the oil filter and if you look inside you will see an opening near the top. This gallery goes directly to the oil pump. Squirt some oil in the hole and put the filter cover back on and you will be good to go.

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Re: Did I do any major damage yet???

Postby Eugene » Wed Jul 29, 2015 9:16 pm

Generator: Black Delco tag = 6 volts. Red tag = 12 volts. Alternator = normally 12 volts.
I have an excuse. CRS.

myusersname
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Re: Did I do any major damage yet???

Postby myusersname » Thu Jul 30, 2015 7:23 am

No light bulbs. I'll look for a tag on the generator. Thanks guys. I'm thinking it is still 6V. I'll prime the pump and run it as minimal as possible until I can get it lubed up well.

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Re: Did I do any major damage yet???

Postby Matt Kirsch » Thu Jul 30, 2015 12:08 pm

How to tell if it's converted to 12V: In 99.999999% of cases, the original generator would be replaced with an automotive type alternator.

Nothing to be baffled about that it ran on 12V. The electrical systems on these are VERY rugged, are VERY simple, and have no electronic devices that would instantly self-destruct on 12V aside from the light bulbs.

As I said before the starter can't tell and doesn't care.

The ignition coil is sensitive to voltage, but it will work for short runs. If you were to run it on 12V for prolonged periods you would want to install a ballast resistor in the supply wire to the coil to prevent overheating.

As long as you don't turn on the lights, nothing is going to go "kaffffoooofff!" and it will run like a champ for about 20 minutes on 12V.


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