Geoff Weeks
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Everything posted by Geoff Weeks
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My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
Sorry I didn't see that earlier. I don't think there is a way that would give the factory result, if it would work at all. For 12 volts, I would look at L/N and a SAE #1 mount. I don't know the cost, but you will have something that can be repaired/replaced easily. I am sticking with 6 volt so staying with the old Delco. I did try an new "aftermarket" armature and found them to work well. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
I don't think that is correct? What does your old one look like? If needed I can open one of mine and see if my memory is any good. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
Do both the "ends" have holes in them to be screwed to the brush holders? If that is the case the center covered in black gets attached to the stud. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
Joey, one thing I just noticed, It looks like coils are all in series? IIRC on mine there are two sets of coils, each had a "north and south " in series and the two groups are in parallel, so two coil ends at a brush holder. In your picture I only see one lead that connects to the stud and one end that ends at the brush holder. Either I am not seeing something, or those are different then what I have in the 4 starters of that type I have. It is possible my memory is faulty, but I remember it being different. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
It shouldn't get hot, but it can. the surface area where the windings connect to the stud is small. Solder has worked for me, but if I was going to do it over, I would use silver solder. Absolutely necessary? no, my starters are proof of that. I just feel it is worth the effort. It will take future stiff nut threads (from)breaking the soft solder. Where he is putting in new windings, I'd go the extra mile. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
The issue /question is can you get the stud in place with the field welded to it? I hadn't pulled my field pole shoes, so there was very little room to work. With the pole shoes out you should a lot more room/options, but I didn't do it that way, I was just trying to repair a connection that had broke loose. With the pole shoes bolted in there isn't enough movement in the ends of the windings to do much more than depress the stud away from the case. So not having done any repair with the pole shoes out, I can't give concrete advice on what is possible. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
There isn't a lot of room in there, so I don't think there is a mechanical means to tie them to the stud. I tried propane and found it wasn't hot/concentrated enough. I used my smallest oxy tip and worked fast, but as I said, If I had to do over I'd use a jewelers torch. The way I did it worked, but was less than ideal. some of insulation wrap got hotter than I'd like. Mine still work just fine. Every time I have to crank a bit to prime, I cringe thinking "you dummy, you should have silver soldered it"! I'd "dry fit" the field to the stud then push the stud away from the case and insulator (to minimize the heat transfer to the case) and solder. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
Silver Solder is a bridge between brazing and soldering. Silver content can vary with higher silver content having a higher melt point. In this application both the ability to hold the pole windings to the stud when heated and the ability of silver to conduct better then "soft solders" are a benefit. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
Joey, If I were to do it over again. I'd buy a "jeweler's" air-acetylene torch and a small tip. You need heat but in a smaller area then the typical oxy-acetylene, and go with silver solder. I think that way you'll have the best chance of a permanent repair regardless of what voltage/current draw passes through the connection. The key is the small, concentrated heat source. -
Last I looked brake bolt were still available.
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Worse case you can order the raw materials from McMaster-Carr. Brake lining material and rivets.
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blank lining can be cut, formed, drilled for rivets, and counter sunk. I used to get brake shoes for the English buses re-lined, and there was no buying pre-made linings for them here. I assume there are still places (likely not as many) that do that. I cut bulk lining and drilled, counter-sunk and riveted brake bands for the semi-auto transmissions in the buses. Worked like a charm.
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My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
I have used solder but I suspect silver solder would be better. At least you starting with all new and clean parts. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
One thing that came to me after a nights sleep. Have you had the pan off? These old engines with non-detergent oil allowed the sludge to accumulate in the bottom of the pan. The oil pick-up screen was designed to "float" above the bottom. (it actually pivots on its tube). If you haven't had the pan off, I would pull it and clean. On mine I wanted to re-bearing but being as old as it was thought I better look at the bearing size 1st. Dropped the pan and cleaned it out, sparkling clean. I put the pan back and it was a while before I found new bearings (may be a month of running) and was shocked at how much more junk had been washed into the pan again. P.S. 15w-40 works great, just don't try and start it after sitting at -23F all night on 6 volts with that in the sump, like I did. I was moving and we stopped at a motel, and the temp took a nose dive while we were sleeping. We had my Explorer also, so pull started it. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
It will, mine was 12 volt - when I bought it. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
Since the filter provides a restriction between the main oil rifle and the sump, removing will not change the pressure. the restriction in the housing limits the flow through the filter to the sump. a restricted filter would not change the pressure. You could try shimming the relief, but I would guess the bearing clearances are more likely. I can't remember if you went through the engine or not. Main bearing sets are hard to find and come in two types, thrust washer type and conventional rear main with thrust surface on the bearing shell. You can use either type, but you have to either remove the thrust washer retaining pin or notch the shell to clear the pin and leave it in place. On mine, I tend to think may be the oil pump shaft bushing may be worn and leaking pressure out of the pump past the shaft bushing. It tops out at about 40 PSI but hot it drops a bit. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
Although they are a bypass and don't do a great deal of filtering, I don't see any gain by not having it in there. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
No, no change to the valve cover. There is (on mine anyway) a 1/4" NPT port that is hooked to the air cleaner in the original set up. I remove this tube and the flare adapter in the valve cover and use a thread in PCV valve in its place and connect to the vacuum port on the manifold. So it draws air in through the fill cap metal gauze and the fumes out the valve to the manifold. As to oil filter, I have one, my 1942 has a Michiana with a paper element and two with a Deluxe with the "sock type" filter. I can get the paper element from Baldwin filters, and have a few sock filters. I had thought of making an adapter and fitting an industrial "Spinner" filter. The ones for trucks need air pressure to return the oil to the sump, the industrial versions are set for gravity return. Unless you want to re-route the oil from the oil pump to the main oil rifle, full flow filtering is not an option. I think you know the relief valve is in the filter adapter, so you can't remove the filter adapter as you'll be removing the relief valve as well. I think the socks are still available, but you may have to look a bit. -
My '48 Int. KB-7 (Sanford)
Geoff Weeks replied to Joey Mack's topic in Antique and Classic Mack Trucks General Discussion
It is what I use, and much better than anything they had "back in the day". I put a PCV system on mine and it helped alot keeping moisture out of the crankcase. -
Need some big help.
Geoff Weeks replied to hicrop10's topic in Antique and Classic Mack Trucks General Discussion
My understanding from previous posts is: he removed all the wiring before working on the cab, so telling by the ammeter will not work. Modern gen regulators are universal. Original regulators will work fine on reverse polarity but the point contact make up was optimized for one polarity to give the longest life. Not something a Hobby truck will ever even notice. Without the original to go on, it is unlikely to matter and negative ground is universal today. If he needed to change, it is as simple as re-polarizing the generator and swapping the battery cables. It is the generator, not the regulator that needs to be polarized, but that is easiest done at the regulator terminals. Regulator doesn't require any change to run "reversed". Some early Western Star and Autocar's use gauges that are positive ground only and can not be made to work (at least easily) on neg ground. Transistor radios will be harmed on reverse polarity. Alternators with one pole grounded to the case will be damaged if hooked up reverse. -
Need some big help.
Geoff Weeks replied to hicrop10's topic in Antique and Classic Mack Trucks General Discussion
Connect the chosen polarity battery to the frame of the truck. with the rest of the batteries hooked up, go to the regulator, jump the battery terminal (B) on the regulator to the armature (A) for a second or two, and that is it. You have polarized the generator and it should start charging the correct way for the way the batteries are hooked. -
Need some big help.
Geoff Weeks replied to hicrop10's topic in Antique and Classic Mack Trucks General Discussion
Looks like it is wired for neg ground, but I can't say for sure. Once again, look to the alternator (if there is one) or the voltage regulator for a generator (they are sometimes marked as to polarity). If not marked, and there are no electronics, then chose one polarity and run with it. Neg ground makes the most sense today. -
That is a very good way to approach the problem. If the drums are worn but not terrible, a re-lined set of shoes will outlast your lifetime if you aren't stopping 80K lbs on a daily biases. Don't let perfection prevent good enough. Talk to some heavy truck parts houses and find one that will either re-line or send your shoes out for re-line. Last time I did that it was a week + or- for them to be ready for pick-up. Being a hobby truck you can wait that long.
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Start by assessing the drums, if they are serviceable and you can get the casting number off them, it will help looking for parts. If the drums are trash, and an odd size, then it is going to be a struggle to find what will bolt in place and work.
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As long as the shoes themselves are not damaged, having new linings installed on the old shoes is likely the best solution.
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