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The Cummins 5.9L engine (359 cu in) is physically smaller than the M11 (661 cu in). The housings look the same but are not. I've heard people have modified the M11 housing to replace a 5.9L engine, but it requires a bit of machining work. There's also that weight factor again. The M11 is a mid...

There is no way to convert this engine to a "non computer" engine. It was designed from the ground up as a computer controlled unit. You will see what I mean if you pop the valve cover off. They can run well over 500,000 miles with a little maintenance like replacing the injectors and adjusting...

Just so you know, the Cummins M11 engine weighs in at 2200 Ibs . I worked on these engines at the transit agency here in the Seattle area. Good engines but they are computer controlled and have had problems with the valve train and injectors. Also be very careful about the fuel you use and...

You know what is so frustrating ? I had those manuals for YEARS and never used them . The moment I tossed them away I needed them ! This has happened to me several times now. It's gotten to the point that I'm afraid to throw away anything anymore. In fact I have these old 1955 Cadillac and...

I looked for my old manuals today. Sadly, they got thrown out during last spring's house cleaning. I totally forgot about that. Now I remember thinking "why keep all these old manuals that I will never use again. There just using up space and collecting dust" . I did keep all my "Cummins...

The check valves need to be installed in front of the air tanks. Just think of a stream of water. No water can be allowed to come back up-stream. Of course that is USA regulations. I don't know about Canadian laws.

I finished cleaning the oil cooler and oil cooler housing. Since "1944mb" from Montana asked how I clean my parts I thought I would show you a little bit of the process. First, all parts have the outside crud removed and then degreased. Once that is done, I usually dissemble whatever part or...

I almost didn't post that tip. I had already loosened the cooler and was going to remove it when I thought someone might come across another stuck cooler. Since these parts are becoming as scarce as "hens teeth" you don't want to damage your cooler. So I posted the tip.

I thought I should let people know what spanner wrench I use. It's the "Blue Point AHS300B" spanner wrench. You can buy new ones on eBay for just $34.00 . I have several as this is my favorite spanner. It is small enough to reach tight places, yet strong enough to take a hit from a hammer.

Today I tore down the oil pan from the last 303M transmission I brought in a few weeks ago. Since it is such a pain to completely tear down a 303M transmission I usually take it in sections. The oil pan comes off and is set aside as is the reduction housing. Later I come back and finish the tear...

They actually do have the pump suck fluid out of the reduction area though it is not really needed. The real reason they keep the pump is for the "governor" assembly. The pump is just an afterthought. But with our transmissions being so old and worn out now, the extra fluid would help tremendously.

I haven't posted much lately partly to being sick, but mostly I'm waiting on the machinist to finish some parts I'm having him make for me. So I've been cleaning and sorting out parts. What to keep and what to throw away. Here is a shift valve I cleaned today. As you can plainly see it is junk...

Yes, that's the one.

I put a 500 Caddy and TH400 into my old CUCV truck. Sold it to the neighbor boy (18yrs old) who promptly drove it into the ground. I told him NOT to over-rev it, but he didn't listen.

I have been thinking about ways to fix the rear pump. The steel sleeve idea is a good one. The only problem is finding the "center" of the "Gerotor's" outer ring. The center part fits on the output shaft, but the outer ring is "offset" . Finding the proper offset and aligning it with the output...

You will need another R-12 valve for the front axle. Also another Primary air tank up there too with safety "one-way" check valves installed in all primary lines. If you want I'll try and find some of my Semi-Truck air system diagrams.

I've been sick for a few weeks and then my family went to Victoria BC for Christmas. So no new HydraMatic information. I do have some pictures of damaged parts I will share today. I tore this HydraMatic down just before I got sick. It had a catastrophic failure of the oil system. You can see...

You know you could use the brake master cylinders used in the M105 trailers. The only problem I see with your idea is the lag time you will have from first applying the foot valve until the brakes are actually applied. You will also experience different apply times between the three brake...

I thought you said you where going to use a 1-1/2" wheel cylinder. On six wheels that is quite a bit more fluid.

Going to a larger internal bore size will give you more braking power. It will also use more fluid and will require a larger master cylinder. Besides that, I believe it is a good modification. On the later M35 deuces many have converted to a larger wheel cylinder and have no problems. I planned...