Geoff Weeks

A main shaft on a 2 or 3 countershaft transmission only sees rotational forces, the two or three counter shafts share the lateral forces pushing them away from the main shaft.

Well, Mack's 3 counter shaft design is strong, because all three shaft push against the main shaft and all forces counter act each other, Kind of like a 3 planet, planetary gearset. Fuller, Spicer and Meritor two countershaft design the counter shafts are 180 deg apart, so the forces counter act eachother. With three counter shafts 120 deg apart the forces counter act eachother, but when you remove one, the mainshaft is side loaded toward the missing shaft. Having the forces counter-act allow the gears on the main shaft "float" without bushing or bearing supporting the gears on the main shaft. You could use bushing and remove one countershaft but that make the transmission much weaker than a 3 countershaft or a two countershaft that are 180 deg apart. It would still be stronger than a single countershaft design of the same shaft sizes, as that one suffers from no counteracting forces on the shafts at all, they are always trying to push each other apart. The counter shafts always are being pushed out from the main shaft but with a 2 or three countershaft transmission those forces are divided equally between all the countershafts, so each would carry 1/2 or 1/3 of the force. When a three counter shaft case has one removed, the main shaft must counteract the forces normally carried by the (missing) 3rd shaft.

Yes, but the countershafts are 180 deg apart on the fuller and spicer, the Mack case has two on top and one under, each force plays against the other two.

This thread seams to confirm 2 counter shafts, I wonder why/how that works? Learn something new every day.

Re-reading this, what I see is it cooled when the mechanic "jumpered" the compressor. Now it doesn't without the jumper. Either wrong switches (if switch type is used) or an APADS problem if that is used. In short, you have an electrical problem not a refrigerant system problem.

Multiple counter shafts are arranged so all the forces on the main shaft are equal, so a twin would be 180 deg apart on the countershafts. I can't see a triple with one shaft removed even working, it would continually be trying to push the main out of alignment?

I'm with you on oil-bath's as well. The British buses had oil baths the size of waste baskets, they held well over a gal of oil. Because the buses were designed for RHD, where the right side of the bus was the "street side" they really took a beating when the right side was the curb side, Everytime the bus throttled up, it kicked up the dirt/dust at the curb and straight into the intake. Oil baths claim to fame, is they maintain a steady pressure drop across the filter through-out its service interval. Slightly more than a brand new "paper filter" but less than a well used paper filter. Properly maintained they are a excellent choice, but I do understand the concern when used with a turbo, on the other hand Detroit used them for years on their 2 strokes.

yes, I never thought about that!

but it still pulled though a common inlet (air cleaner) What is at issue is: does the intake flow enough at full power load? If it does there is no problem, that filter was to power a much bigger engine when the truck was built. If it doesn't you'll see a pressure drop in the intake tubing under full load. Easy to check.

Not just the panel, the whole evaporator, Tx and blower is gone.

In reality it is always shared, just where it comes together (air cleaner or pipe) is different. A differential pressure gauge that looks at the amount of pressure drop in the intake pipe when working the engine hard, will tell if there is a problem or not.

on, but not torqued down (test fitting)

AFAIK, there are no 6" headlights if round, 4 bulbs are 5 3/4" , 2 bulb are 7" In rectangle type there are 4 and 2 bulb styles, 4x6" for the quad and 7x 6" for the twin. so just saying 6" isn't going to get you far. any autoparts store should carry them.

At those pressures I would say air temp is around 76 deg F

Right off the bat, I'd say the compressor is not compressing, either the clutch isn't locking or the compressor isn't functioning. check voltage to the clutch. A Tx valve doesn't "open and close" it is a restriction, that gets bigger or less so, but is always a restriction between the high and low side. Forget the Tx valve and take a hard look at the compressor.

Well, I was wrong, I was able to find a N.O.S. 60 amp regulator for it. I finished the overhaul, I made a few modification that I hope will come back to bite me. Rather than solder the output wires on the last + and - diode in the string, I tapped 8-32 and used a screw and nut to make the connection. If the unit ever has to come apart again, the output leads will not have to be un-soldered from the diode to separate the stator from the rear housing. I also deviated from the instructions on how the grounded field brush gets its ground. Both modifications can be removed and re assembled as in the instructions if they cause a problem. Ready to go on the truck, but likely will not for a while yet.

Again, the SC ruling IS the law, and it was unanimous, and they trying to avoid compliance.

The court is the is the final word on what the law is, that is one of the founding principles of our republic, if you want to overturn that, you are talking about loosing our entire foundation of our nation.

Yes, and slavery was also deemed legal at some point in our country's past. What matters is how the court rules, that is the law until the court says otherwise. You can criticize the Court, you can disagree with how they rule, but when you ignore the court then we cease being a country of laws and become the worse of all we fear. I would agree that they are "incorrect" in some of their rulings, but I still abide by them until I can successfully change the law or the ruling. It isn't up to one man or one administration to choose what laws they will abide by and which they will ignore, we loose our freedom if that is allowed to happen.

If you want to enforce the law you must first abide by it. Here is a quote, you can look up the decision yourself about these deportations "On April 7, the U.S. Supreme Court unanimously held that if the Trump administration seeks to deport someone under President Donald Trump's invocation of the Alien Enemies Act (AEA), then that deportee must first be afforded due process, including "notice and an opportunity to challenge their removal." Furthermore, according to the Court's order, "the notice must be afforded within a reasonable time and in such a manner as will allow them to actually seek habeas relief in the proper venue before such removal occurs."

We claim to be better than China, now we have to live up to that claim. Citizens have already spent 10 days in"Custody" because they "didn't believe" his documents! It is why courts HAVE to be involved. I carry a drivers Lic, whether they "choose" to believe that I am a citizen or not so far hasn't been tested with me, but has for others. IF ICE gets to choose what is proof or if the document you have is valid, you better believe I want the ability to have a court review their actions.

Well the supreme court has ruled otherwise. To not do so, the accuser would only have to accuse you then deport you even if you were a citizen. I prefer to follow the Supreme Courts ruling than yours.

To be clear they do! Anybody has the right to have their right to address their accuser in a court of law. The court has said so!

Seller found one with the correct shaft/spline so this topic can be closed/deleted

The Constitution applies to everybody here, to do otherwise all a accuser would have to do is claim you are not a citizen, deny due process and wisk you out the country. Without going to court you have no way to dispute their allegations. Citizenship would then be meaningless. There are ways to deport correctly, yes it takes time, but it is the only way to uphold the rights we hold dear. This is not the same as someone at the boarder trying to gain entry, there are far less protections for anyone, citizens included, entering from outside. Even as a citizen, you don't have restrictions on searches, even very invasive ones that would not be permitted once you are in country. We are hearing more and more accounts of citizens being told to "self-deport" in E mails, so it is obvious we can not trust them to "get it right" the only thing preventing them from deporting these citizens is the constitution and you want that suspended?