1940 Farmall A Split Part 2

While this post is going up in August, everything recounted below happened in July. I’m just really bad about posting it!

To recap: The Farmall developed a coolant leak in the clutch housing. The coolant would drip out slowly and drain the engine of water over a couple of days. This is most likely due to a failed expansion plug, which we are going to replace, and that requires splitting the tractor.

The next steps are to remove the various components that connect the engine block to the back of the tractor: generator, starter, wiring, fuel tank, and steering column (more on that later).

Missing a few things now

This tractor is very easy to work on, so I just methodically removed all of those things. From there, I removed the valve train cover and brought my engine hoist into place.

I needed taller jackstands

If I were to do this over again, I would have removed the front wheel assembly. My older engine hoist cannot hold the engine up for long periods of time, so I wound up just re-attaching it to the bell housing between work sessions. Without the front wheels, it would have been a lot easier to rig a stand or rest the engine block on the floor.

With everything supported, it’s straightforward to remove the six bolts that mate the engine to the bell housing. Once those are removed, if everything is aligned and level, the engine should just float forward.

A floating engine

Once I had it apart, I could very quickly see the problem. The water jacket expansion plug on the A is a 2 inch metal disc, and this one was heavily corroded.

I guess it has a right to rust after almost 80 years

I quickly removed that, and discovered a lot more sludge behind it. I used a long wire that I could bend into various shapes to clean as much of it out as I could.

Installing a new expansion plug requires removal of the flywheel. This was getting a little more complex, but I pulled the clutch pressure plate and clutch plate pretty easily! From there, there are some annoying metal covers to the flywheel bolts. They’re annoying because they are bent over the bolt heads to keep them from turning. They bend back (to allow removal) - but bending them back over the heads for re-installation was a bit frustrating. I probably should have put in new ones here.

Really a clever locking system to keep those bolts from ever loosening

I just realized I have no photos of the new plug! Trust me when I say I installed it. I wire-brushed the hole, and applied a bead of gasket material around the shoulder - the metal, having corroded over the years, couldn’t be trusted to provide a top-notch mechanical seal.

The expansion plug itself is slightly domed; you set the plug in the hole with the dome facing outward. Then you whack it with a hammer! This causes the plug to expand and fill the hole, if you’ve done it right. I recommend using a piece of wood or something that fits well over the plug in order to plant all the force in the most advantageous spot - the center.

From here on in, the re-assembly is mostly the reverse of the assembly. The flywheel is keyed, so installation on the engine is no problem. I gave everything a cleaning with some MEK - this project generated a lot of dirty rags.

I also took the time to sand and repaint part of the bell housing and peripheral equipment. The generate and starter got a nice coat of black, while the fuel tank got an internal cleaning and sealing to prevent any future rust.

Putting it all back together…

I’ve mowed three times and have had great success with everything! One thing I would (and need to) do would be to clean the block more aggressively. Since re-assembly more sludge has made its way into the radiator, which really destroys the ability of the radiator to cool the engine. I’ll be flushing the system again soon…and someday I hope to have it completely sludge free. I marvel at how much garbage could be in an engine, and yet it still worked hard week after week. Truly the raw resilience of the old iron engines is incredible!

The Kohler Sink - 1 Year Later

It’s a cold day here at the homestead! Roughly 12 degrees or less on the thermometer, lots of wind and snow.

I realized the other day, we are coming up on a 1 year anniversary with our new Kohler kitchen sink. Last year, Sarah brought up the idea of replacing our kitchen sink. I was all for it, the old one was stainless steel and starting to look its age. With our hard water, it really adds to the dingy look.

You can read about that adventure here.

In the intervening year, Sarah put up a nice curtain to mask the under sink area, since we had to remove the cabinet doors. This is a nice touch that can be updated seasonally, adding color and personalizing the kitchen.

The biggest challenge has been keeping a white sink clean! We have found that Bar Keeper’s Friend is truly a lifesaver when dealing with the various marks that come from the pots, pans, and silverware. These marks look like scratches, but the enamel itself is not damaged. A quick scour with the Bar Keeper’s Friend will remove those marks very quickly. To avoid staining, we simply use bleach - a soft-scrub bottle with bleach will help keep the enamel clean and bright.

Kohler provides a small packet of paste cleanser that is specially formulated for their enamel products. My thought is that this is probably the best cleanser for the sink; but I haven’t got around to buying any yet, and the cleaners we’ve been using just work so well we’ve had no reason to change.

One year on, things are looking as sharp as ever. The hard water does a number on the hand sprayer, but thankfully those are cheap to replace when the time comes. Frequent vinegar usage will help keep the buildup to a minimum. A water softener is somewhere in our future, but there’s a few other things to do first.