Cub Valve Tappets

Today I cleaned off the valve access cover and the side of the engine where the cover was. It took me two hours to get that old gasket material off. There was also some squeeze tube gasket material along with the cork. I used a stiff wire brush, sharp pry bar and a dental pick to get it off, then primed and painted the cover. The tappets are adjusted by using two small wrenches. The #1 spark plug is removed and the engine cranked (I have a Ford crank) until compression is felt, then the pointed on the left side of the engine is aligned with the notch on the fly wheel. At first I did not follow that plan exactly and the valves were open at #1 cylinder so I could not get the .013 feeler gauge in place. After a while I figured it out and found most of the tappets were close to where they should be. I tweaked a few. One of the nice things about these old Cubs is the firing order is cast into the engine – 1-3-4-2. The engine is revolved half a turn following the first cylinder. I just followed the firing order and completed the adjustments.

While doing this section of the tractor refurbish, I discovered the engine serial number – in the 60,600 range – and the casting date. The year was coded with a letter. My old Cub engine was manufactured in October 1948. I believe the tractor was assembled in mid January 1949.

Since I was waiting for paint to dry, I removed the access covers to get to the commutators of both the generator and the starter motor. They look okay to me so I just used compressed air to blow out dirt, then I proceeded to clean up the threads on the small screws and nuts which hold the access covers together. At this point I am waiting for paint to dry on the cover for the starter, and making a new liner for the generator cover. The old one fell apart in my hands.

The new battery is in the refurbished battery box. It is sitting on a piece of 4X4 so I can remove it easily. As soon as I can get to a suitable store I will get some flat tie down material to cut it for a means to remove the battery when it is all the way down in the battery box. This particular battery and another I saw have no lifting handle – so I will make one.

Tractor Boy

Farmall Cub Switch Replacement

It was a cold, wet, dreary day in Central Texas. Perfect weather in which to replace the light switch I replaced last week. The first replacement was blowing a 20-amp fuse in less than a second when turned to the farthest right position. Fortunately, I had added a separate fuse holder to the circuitry when the replacement did not have a fuse position. I spoke with the nice folk at Farmall Cub Forever and ordered a three position six-volt switch which arrived a few days ago. This time I took pictures so you can see what I was doing. Again, I replaced one wire at a time. The switch has a protrusion which fits in a notch in the console, and I replaced it so the two were properly aligned. I discovered it was easier to take the console off this time, and I did not need a small monkey to reach in the confined space. I did; however, forget that I placed a piece of board between the hydraulic housing and the hood/fuel tank. So, when I started up the Cub to see how well it would run, there...

Farmall Cub greasing

Replacing gear oil and greasing the ’49 Cub ought to be a straight forward task(s). Well it hasn’t been. The transmission fluid was tan, looking like tan paint. Folks on Yesterday’s Tractor Farmall forum said it meant water had got inside the transmission. I wonder whether this tractor was under water at one time. I bought a Spectricide brand insecticide pump, put kerosene in it, and flushed the transmission, then refilled with 90 weight gear oil. The gear oil looked like and had the consistency of thin honey. Pic 1300 shows the transmission filler plug. A lot easier to reach than the plug for emptying the transmission. Note it has a square head. All of these plugs are square headed. Three and a half pints later, the transmission was back together. After the transmission, I decided to check the steering gear oil. It was not tan. It was black as could be so I flushed the housing with kerosene again and refilled with ¾ pint of 90 weight gear oil and replaced the filler plug. Pic 1301 s...

Farmall Cub carb and oil

The past few days I have been working on my Jan 1949 Farmall Cub tractor. I replaced the oil filter which was made of cardboard with one from NAPA with a metal body. Pic 1264 shows the oil drain location on the right side of the engine. 1268 shows the oil drained, and 1269 shows the old oil filter. The oil was a bit dirty, but much, much cleaner than the black oil I drained from the 8N Ford. The oil filter reservoir cap needed cleaning and painting so I took care of that too. A dental pick was used to scrape off mu7ch of the dirt, followed by a small steel brush. Then a coat of primer and two coats of Farmall red made a pretty looking cap. It is a good thing I have tools! A set of used dental picks, several small brushes, a cleaning tank, left handed drill bits, and finally a can of carburetor cleaned were all used to clean and restore the carburetor. Tractor Supply sells a kit for the IH carburetor on the 59 year old tractor. Pic 1261 shows the carburetor as removed ...

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