Working on a Farmall 340

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Re: Working on a Farmall 340

Postby 2cubs » Fri Mar 08, 2019 3:05 pm

After getting the fire going in the wood furnace I pulled the plugs back out of the 340. No wonder it was missing. The No. 2 plug was caked with crud and No. 1 wasn't much better. I cleaned them up again in the glass bead cabinet, installed them, and the engine fired right up. It runs good and smooth now. There is a bit of a whine or howl that sounds like hydraulic pump noise. I need to check fluid levels and see if thats the problem. I'll post a video once its uploaded.

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Re: Working on a Farmall 340

Postby 2cubs » Fri Mar 08, 2019 6:06 pm

Here is the video:


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Re: Working on a Farmall 340

Postby 2cubs » Mon Mar 11, 2019 8:52 pm

Made a road trip today to get some Trans/Hydraulic oil. The oil in the trans now has water in it. It has a milky yellow appearance to it. I also picked up a water temp gauge and a new oil gauge line. The old oil line is rust pitted to the point of leaking when the tractor is running.

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Re: Working on a Farmall 340

Postby 2cubs » Tue Mar 12, 2019 8:25 pm

Another problem with this tractor is the hydraulics didn't seem to be working. The 2-point lift wouldn't lift or drop when I move the lever. I drained the trans out today, pulled the filter cover, and found the round screen in the filter was completely plugged with thick gooey crud. I'm assuming the filter is plugged with the same stuff. I'm hoping this might be the problem with the lift.

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Re: Working on a Farmall 340

Postby Indy4570 » Wed Mar 13, 2019 12:45 am

thats not oil, its primordial ooze
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better to have it and not need it than to need it and not have it...( YES this includes CUBS! )

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Re: Working on a Farmall 340

Postby 2cubs » Wed Mar 13, 2019 9:42 pm

The lower shaft on the PTO has been leaking oil since I pulled the tractor in the shop. Figured this was a good time to put a new seal in so I dug the old one out and i will see if NAPA has one tomorrow. Now that the trans has drained really good I looked through the fill and drain plug holes and it looks clean inside. I cracked open the engine drain plug to see if there was any water or antifreeze in the oil. Not a drop of either came out.

I also picked up a new hydraulic filter today.

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Re: Working on a Farmall 340

Postby Jim Becker » Wed Mar 13, 2019 9:56 pm

Odd the "R91" part of the number isn't stamped into the existing seal. It was 260137R91. The current number is 71599C91. NAPA should be able to cross it.

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Re: Working on a Farmall 340

Postby 2cubs » Thu Mar 14, 2019 12:19 am

Jim Becker wrote:Odd the "R91" part of the number isn't stamped into the existing seal. It was 260137R91. The current number is 71599C91. NAPA should be able to cross it.


I think it was on there. Look at the 2nd pic and expand it and you can see the "R" along the top side of the shaft.

Thanks for the part numbers, Jim.

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Re: Working on a Farmall 340

Postby 2cubs » Thu Mar 14, 2019 12:23 am

It looks like the PTO has it own oil in it. This is the planetary PTO and from the info I have it uses 2 Qts. of oil. Does this just use Hy-Tran or does it take something else?

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Re: Working on a Farmall 340

Postby Jim Becker » Thu Mar 14, 2019 7:02 am

2cubs wrote:
Jim Becker wrote:Odd the "R91" part of the number isn't stamped into the existing seal. It was 260137R91. The current number is 71599C91. NAPA should be able to cross it.


I think it was on there. Look at the 2nd pic and expand it and you can see the "R" along the top side of the shaft.


I think you are right. Not very near the rest of the number is it?

Use Hy-Tran or equivalent.

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Re: Working on a Farmall 340

Postby 2cubs » Fri Mar 15, 2019 12:31 am

I checked around several parts stores including the Case IH dealer for the PTO seal and nobody had one in stock. I ordered a new one from NAPA that will be here next Tuesday. The only thing I did on the tractor was clean the screen and install the new hydraulic filter.

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Re: Working on a Farmall 340

Postby 2cubs » Fri Mar 15, 2019 3:01 pm

Filled the trans with Hy-Tran and fired it up to try the Hydraulics/2-point Lift. The hitch goes up and down now so the plugged filters must have been the problem.

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Re: Working on a Farmall 340

Postby 2cubs » Sun Mar 17, 2019 1:23 am

While I was trying out the Fast Hitch lift system I noticed the flat bars for the anti-sway were bending as the lift was raised and lowered. It looked like the lower pivot shaft was rusted solid and not turning. I got it pulled out and set it up in the press where I was able to push the shaft out. I'll get it cleaned up good and plan on putting a couple grease fittings in it before I install it. It never makes sense to me why a part like this would be built without a way to grease it.

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Re: Working on a Farmall 340

Postby 2cubs » Sun Mar 17, 2019 1:26 am

A couple more pics.

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Re: Working on a Farmall 340

Postby 2cubs » Sun Mar 17, 2019 7:56 pm

I cleaned up the hitch pieces and installed a grease fitting. I only used one zerk in the middle after seeing how it was built. The end plates act as the bearings for the shaft and the pipe center has about an 1/8" larger Dia. so it will just get filled with grease and push out of the ends. I don't think it will ever seize up again. I hope this is the last surprise that needs to be fixed and I can get this put back together this coming week.

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